艾默生PH传感器
General Purpose pH/ORP SensorThe wetted sensor materials may not be compatible with process com position and operating conditions. Application compat ibility is entirely the responsibility of the user.CAUTION: SENSOR/PROCESS APPLICATION COMPATIBILITYBefore removing the sensor, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is lowered to a safe level!WARNINGSpecificationsSensor Type: General purpose 3900Measured Range: pH AccuGlass 0-14ORP -1500 to +1500 mV Percent Linearity Over pH Range:Operating Temperature: -10° to 100°C (14° to 212°F) Automatic temperature compensation -10° to 100°C (14° to 212°F)Maximum Pressure: 790 kPa [abs] (100 psig) at 100°C (212°F) CRN rating: 60 psig up to 100°C (212°F).Materials of Construction: stainless steel, glass, Teflon, polyphenylene sulfide (PPS), and EPDMRange Linearity 0 - 7 97% 1 - 7 98% 4 - 7 98% 7 - 10 99% 7 - 12 97% 7 - 1396%7 - 14 95%Materials of ORP: PlatinumProcess Connections:Front facing: 3⁄4˝ and 1˝ MNPTRear facing: 1˝ MNPTIntegral Cable: 32 ft (10m) cable with integral SMART preamp; 15 ft (4.7m) cable without preamp sensor VP8 Cable: use 24281-XX, 2.5 ft (.8m) to 100 ft (31m)Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)The solution used during calibration is an acid and should be handled with care. Follow the directions of the acid manufacturer. Wear the proper protective equipment. Do not let the solution come in contact with skin or clothing. If contact with skin is made, immedi-ately rinse with clean water.CAUTIONFigure 1. 3900 Insertion/Submersion SensorStorage1. It is recommended that electrodes be stored in theiroriginal shipping containers until needed.2. Do not store at temperatures below -10°C (14°F).3. Electrodes should be stored with a protective capcontaining KCl solution (PN 9210342).4. For overnight storage, immerse the sensor in tapwater or 4 pH buffer solution.5. A pH glass electrode has a limited shelf life of one year.Electrode preparation1. Remove electrode from shipping container.2. Remove the protective boot covering the electrodebulb.3. Rinse away salt film with clean water, then shake theelectrode so that the internal solution fills the bulb,thus removing any air trapped there.InstallationFor sensor orientation, see Figure 2.For sensor dimensions, see Figure 3.For mounting options, see Figures 4-7.For wiring, see Figures 8-41.For additional wiring information, please visit our website at /raihome/liquid/wiring. Wrap the sensor threads with six or seven (6–7) turns of Teflon tape to prevent leakage. Do not over tighten the sensor into it’s receptacle. Hand tighten the sensor, and then tighten one or two (1–2) turns with a wrench. Two point buffer calibration Select two stable buffer solutions, preferably pH 4.0 and 10.0 (pH buffers other than pH 4.0 and pH 10.0 can be used as long as the pH values are at least two pH units apart). NOTE: A pH 7 buffer solution reads a mV value of approx. zero, and pH buffers read approximately ± 59.1 mV for each pH unit above or below pH 7. Check the pH buffer manufacturer specifications for millivolt values at various temperatures since it may affect the actual value of the buffer solution mV/pH value.1. Immerse sensor in the first buffer solution. Allowsensor to equilibrate to the buffer temperature (toavoid errors due to temperature differences between the buffer solution and sensor temperature) and wait for reading to stabilize. Value of buffer can now beacknowledged by analyzer/ transmitter.2. Once the first buffer has been acknowledged by theanalyzer/transmitter, rinse the buffer solution off ofthe sensor with distilled or deionized water.3. Repeat steps 1 and 2 using the second buffersolution.4. The theoretical slope value, according to the Nernstequation for calculating pH, is approximately 59.1mV/pH. Over time the sensor will age, both in theprocess and in storage, which will result in reducedslope values. To ensure accurate readings, it isrecommended that the electrode be replaced whenthe slope value falls below 47 to 49 mV/pH. Recommended pH Sensor StandardizationFor maximum accuracy, the sensor can be standardized on-line or with a process grab sample after a buffer calibration has been performed and the sensor has been conditioned to the process. Standardization accountsfor the sensor junction potential and other interferences. Standardization will not change the sensor’s slope but will simply adjust the analyzer’s reading to match that of the known process pH.Maintenance for pH electrode Electrodes should respond rapidly. Sluggishness, offsets, and erratic readings are indicators that the electrodes may need cleaning or replacement.1. All pH/ORP sensors have a plastic enclosure which must only be cleaned with a damp cloth to avoid the danger due to a build up of an electrostatic charge.2. All pH/ORP sensor models are intended to be in contact with the process fluid and may not meet the 500V r.m.s. a.c. test to earth. This must be taken into consideration at installation.ATEX DIRECTIVE: Special Conditions for safe use21. To remove oil deposit, clean the electrode with a mildnon-abrasive detergent.2. To remove scale deposits, soak electrodes for 1 to 5minutes in a 5% hydrochloric acid solution.3. Temperature effect on life expectancy: If glasselectrode life expectancy is 100% at 25°C (77°F), then it will be approximately 25% at 80°C (176°F), and approximately 10% at 100°C (212°F).ORP Calibration1. After making an electrical connection betweenthe sensor and the instrument, obtain a standard solution of saturated quinhydrone PN R508-8OZ (475mV). This can also be made quite simply by adding a few crystals of quinhydrone to either pH 4 or pH 7 buffer. Quinhydrone is only slightly soluble, therefore only a few crystals will be required.2. Immerse the sensor in the standard solution. Allow1-2 minutes for the ORP sensor to stabilize.3. Standardize the instrument to the solution valueshown in the table, right. The resulting potentials, measured with a clean platinum electrode and saturated KCl/AgCl reference electrode, should be within +/- 20 millivolts of the value shown in the table below. Solution temperature must be noted to ensure accurate interpretation of results. The ORP value of saturated quinhydrone solution is not stableHydrochloric acid is toxic and highly corrosive. Avoid skin contact, wear protective gloves. Use only in a well venti-lated area. Do not inhale fumes. In case of an accident, consult a doctor immediately.CAUTIONover long periods of time. Therefore, these standards should be made up fresh each time they are used.4. Remove the sensor from the buffer, rinse, and installin the process.Maintenance for ORP ElectrodeElectrodes should respond rapidly. Sluggishness, offsets, and erratic readings are indicators that the electrodes may need cleaning or replacement.1. To remove oil deposit, clean the electrode with a mildnon-abrasive detergent.2. To remove scale deposits, soak electrodes for 1 to 5minutes in a 5% hydrochloric acid solution.3. ORP (metallic) electrodes should be polished withmoistened baking soda. p H 4 Solution p H 7 Solution Temp °C 20 25 30 20 25 30 mV Potential268 264 260 94 87 80ORP of Saturated Quinhydrone Solution (millivolts)Figure 2. Sensor OrientationFigure 3. Sensor DimensionsFigure 4. Typical Flow Through insertion installation using PN 2002011 Pipe Tee (sensor must be installed at least 10° above the horizon)Figure 5. Low Flow Cell PN 24091-00psig (kPa [abs]) °F (°C)150 (1136) 150 (65)128 (984) 160 (71)102 (805) 170 (77)80 (653) 180 (82)57 (494) 200 (93)48 (432) 210 (99) Horizontal Pipe Tee (PN 2002011) Pressure/Temperature RatingsInlet and outlet connections are stainless steel and take 1/4-inch OD tubing. Flow cell is polycarbonate with 1/4-inch FNPT fittings.Wetted materials:Body & Nut – Polyester/PolycarbonateFittings – 316 SSTSeals – SiliconeFlow cell ratings:Temperature: 32˚-158˚F (0-70˚C)Max. Pressure: 90 PSIG (721 kPa [abs])Flow rate: 2-5 GPH (7.6-18.9 LPH)INCH MILLIMETER4Figure 6. Jet Spray Cleaner PN 12707-00 (sensor must be installed at least 10° above the horizon)Figure 7. Low Flow Panel PN SQP10077-LQDThe Jet Spray Cleaner eliminates routine, manual sensor maintenance by cleaning the sensor with water or compressed air. Flow through the cleaner can be controlled by a solenoid valve.NOTE: The Jet Spray Cleaner can be used with Handrail Mounting Assembly (PN 11275-01, not shown) or can be mounted through conduit as shown below.Jet Spray Cleaner shown with 3900VP pH sensorInlet flow 3-80 gph (11.4-304 L/hr)Inlet pressure 3 – 65 psig (122 – 549 kPa abs)*Temperature32 - 122°F (0 - 50°C)*The minimum inlet pressure is required to open a check valve, which pre-vents the flow cell from draining if sample flow is lost. Removing the check valve lowers the inlet pressure requirement to a few feet of water head.Low Flow Panel SpecificationsFigure 8. 3900-01 and 3900VP-01 to 54epH/ORPFigure 9. 3900-02 and 3900VP-02 to 54epH/ORPFor additional wiring information on this product, including sensor combinations not shown here, please refer to either our online wiring programs or the Manual DVD enclosed with each product.1056, 1057, 56, 5081, 6081, 54e, and XMT: /raihome/sp/liquid/wiring/XMT/1066 and sensors with SMART preamps: /en-US/brands/rosemountanalytical/Liquid/Sensors/Pages/ Wiring_Diagram.aspx 1055: /raihome/sp/liquid/wiring/1055NOTEFigure 10. Sensor Wiring 3900VP-01 gray cable to 54epH/ORP Figure 11. Sensor Wiring 3900VP-02 gray cable to 54epH/ORPFigure 12. 3900-01 and 3900VP-01 to XmtFigure 13. 3900-02 and 3900VP-02 to XmtFigure 14. Sensor Wiring 3900VP-01 with gray cable to XMT Figure 15. Sensor Wiring 3900VP-02 with gray cable to XmtFigure 16. 3900-01 and 3900VP-01 to 1055Figure 17. Two-Input 3900-01 and 3900VP-01 to 1055Instruction Sheet General Purpose pH/ORP Sensor Sensors LIQ_MAN_ABR_3900 August 2013 Figure 18. 3900-02 and 3900VP-02 to 1055Figure 19. Two-Input 3900-02 and 3900VP-02 to 1055General Purpose pH/ORP Sensor Instruction Sheet August 2013 LIQ_MAN_ABR_3900 Figure 20. Wiring with Remote Junction Box and Preamp (PN 23555-00) to 3900-02 and 3900VP-02Figure 21. 1055pH/pH Wiring through Remote Junction Boxes to 3900-02 and 3900VP-02Instruction SheetGeneral Purpose pH/ORP Sensor SensorsLIQ_MAN_ABR_3900August 2013Figure 22. 3900 Sensors, Preamplifier in Junction Box4 5 1210 11 3 6 9 7 2 8 1 4 5 1011 3 6 97 2 8 4 5 10 3 6 97 2 8 145103 69 728 B N C N o C o n n e c t i o n T B 2T B 1G r e e nW h i t e /R e dW h i t eR e dW h i t e /G r a yG r a yB l u eC l e a rO r a n g eG r e e n (+5 V D C )B r o w n (-5V DC )54e p H /O R P 5081W h i t e /B l a c k ( m V /p H S h i e l d) B l u e (S o l u t i o n G r o u n d )G r a y (R e f e r e n c e i n ) W h i t e /G r a y (R e f e r e n c e S h i e l d ) R e d (R T D i n ) W h i t e (R T D R e t u r n ) I D (i n n e r d r a i n ) B l a c k ( m V /p H i n )X M T+5V D C / +V S N S RR T D S E N S E /S N SR T D I Np H /p H i n-5V D C / -V S N S RR T D R T N /R T NR e f S H L D / S H L D /G U A R Dp H S H L D / S H L D / G U A R DR E F / R E F I NG N D /S O L G N D12145101136972814510369728W h i t e /R e d (R T D S e n s e )I D (i n n e r d r a i n ) (N o C o n n e c t i o nR o s e m o u n t A n a l y t i c a l i n t r u m e n t s :56 / 1056 / 1057 /1066 / 6081• F o r 3900-02 a n d 3900V P -02 s e n s o r s • N o n -p r e a m p s e n s o r s • B l u e C a b l e3900 S e n s o r s , P r e a m p l i f i e r i n J u n c t i o n B o xR e m o t e J u n c t i o n B o x P N 23555-00 o r S e n s o r H e a d J u n c t i o n B o x P N 23709-00(B o t h J -b o x e s i n c l u d e P r e a m p l i f i e r B o a r d P N 23557-00)E x t e n s i o n C a b l e P N 23646-01 o r 9200273 s h o w n E x t e n s i o n C a b l e P N 9200348 c a n a l s o b e u s e d ; e x t e n d c o l o r s c h e m e f r o m s e n s o r o r V P 8 c a b l e i n s t e a d o f u s i n g s h o w n w i r i n g s c h e m e . C o n n e c t t o i n s t r u m e n tg r o u n d o r a s s h o w nGeneral Purpose pH/ORP SensorInstruction SheetAugust 2013LIQ_MAN_ABR_3900Figure 23. 3900 Sensors, Preamplifier in Sensor• F o r 3900-01 a n d 3900V P -01 s e n s o r s • P r e a m p l i f i e r i n s e n s o r • B l u e C a b l e3900 S e n s o r s , P r e a m p l i f i e r i n S e n s o rInstruction SheetGeneral Purpose pH/ORP Sensor SensorsLIQ_MAN_ABR_3900August 2013Figure 23. 3900 Sensors, Preamplifier in SensorR e m o t e J u n c t i o n B o x P N 23550-00 (w i t hE x t e n s i o n b o a r d f o r p o i n t -t o -p o i n t w i r i n g )c a n a l s o b e u s ed ; W h i te /g r a yi s r e p l a c e m e n t w i r e c o l o r f o r B r o w n w i r e .3900 S e n s o r s , P r e a m p l i f i e r i n S e n s o r , J u n c t i o n B o x u s e d f o r e x t e n d i n g c a b l e1066 / 6081• F o r 3900-01 a n d 3900V P -02 s e n s o r s • P r e a m p l i f i e r i n s e n s o r • B l u e C a b l eGeneral Purpose pH/ORP Sensor Instruction Sheet August 2013 LIQ_MAN_ABR_3900 Figure 22. 3900-01 and 3900VP-01 to Models 5081, 4081 or 3081Figure 23. 3900-02 and 3900VP-02 to Models 5081, 4081 or 3081Instruction Sheet General Purpose pH/ORP Sensor Sensors LIQ_MAN_ABR_3900 August 2013 Figure 10. Wiring for 3900-01 and 3900VP-01 to 56, 1056 & 1057 pHFigure 11. Wiring for 3900-02 and 3900VP-02 to 56, 1056 & 1057 pHGeneral Purpose pH/ORP Sensor Instruction Sheet August 2013 LIQ_MAN_ABR_3900 Figure 26. Sensor Wiring 3900VP-01 with gray cable to 1056/56Figure 27. Sensor Wiring 3900VP-02 with gray cable to 1056/56Instruction Sheet General Purpose pH/ORP Sensor Sensors LIQ_MAN_ABR_3900 August 2013 Figure 28. Sensor Wiring 3900VP-01 with gray cable to 1057Figure 29. Sensor Wiring 3900VP-01 with gray cable to 1057General Purpose pH/ORP Sensor Instruction Sheet August 2013 LIQ_MAN_ABR_3900 Figure 30. pH/ORP Sensor Wiring – 1066/3900VP-01 (blue cable – refer to manual for recommended cable order)Figure 31. pH/ORP Sensor Wiring – 1066/3900VP-02 (gray cable – refer to manual for recommended cable order)Instruction SheetGeneral Purpose pH/ORP Sensor SensorsLIQ_MAN_ABR_3900August 2013Figure 32. pH/ORP Sensor Wiring – 1066/3900VP-01 (refer to manual for recommended cable order)Figure 33. pH/ORP Sensor Wiring – 1066/3900VP-01 (blue cable – refer to manual for recommended cable order)General Purpose pH/ORP SensorInstruction SheetAugust 2013LIQ_MAN_ABR_3900Figure 34. pH/ORP Sensor Wiring – 1066/3900VP-02 (refer to manual for recommended cable order)Figure 35. pH/ORP Sensor Wiring – 1066/3900VP-02 (blue cable – refer to manual for recommended cable order)Instruction Sheet General Purpose pH/ORP Sensor Sensors LIQ_MAN_ABR_3900 August 2013 Figure 36. Sensor Wiring 3900VP-01 with gray cable to 5081Figure 37. Sensor Wiring 3900VP-01 with gray cable to 5081General Purpose pH/ORP SensorInstruction SheetAugust 2013LIQ_MAN_ABR_3900Figure 38. 3900-01 and 3900VP-01 to 6081-PFigure 39. 3900-02 and 3900VP-02 to 6081-PInstruction SheetGeneral Purpose pH/ORP Sensor SensorsLIQ_MAN_ABR_3900August 2013Figure 40. Sensor Wiring 3900VP-01 with gray cable to 6081Figure 41. Sensor Wiring 3900VP-02 with gray cable to 508126General Purpose pH/ORP SensorInstruction SheetAugust 2013LIQ_MAN_ABR_3900Ordering InformationThe 3900/3900VP pH/ORP Sensor is housed in a PSS plastic body with built-in solution ground for advanced diagnostics. A Pt-100 RTD is offered for temperaturecompensator. The sensor is available with an integral cable or VP8 connector. Junction box kits with preamplifierscan be ordered separately if an analyzer/ transmitter with an integral preamplifier is not located within 15 ft. of the sensor. SMART preamplifier (-01) is the standard pream-plifier option, and is compatible with models XMT, 3081, 5081, 6081, 54e, 1055 and 1056 analyzers/transmitters.3900 pH/ORP Sensor - New Generation general purpose sensor3900VP pH/ORP Sensor - New Generation general purpose sensor with VPEXAMPLE 3900 - 01 - 12EXAMPLE 3900VP - 02 - 10Instruction Sheet General Purpose pH/ORP Sensor Sensors LIQ_MAN_ABR_3900 August 2013 Accessories27Credit Cards for U.S. Purchases Only.©2013 Rosemount Analytical, Inc. All rights reserved.The Emerson logo is a trademark and service mark of Emerson Electric Co. Brand name is a mark of one of the Emerson Process Management family of companies. All other marks are the property of their respective owners.The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available on request. We reserve the right to modify or improve the designs or specifications of our products at any time without notice./EmersonRosemountAnalytical /RAIhome/user/RosemountAnalytical Emerson Process Management2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500Fax: (949) LIQ_MAN_ABR_3900Rev. D August 2013。
S-PH-01 pH 传感器用户指南说明书
User GuidepH Sensor(S-pH-01)User GuideVersion:V2.11/20©2008-2021Seeed Technology Co.,Ltd.All rights reserved.Content1.Introduction (3)2.Wiring diagrams (4)3.Dimension (5)4.Installation Maintenance and Calibration (6)4.1Installation (6)4.2Maintenance (6)5.Output Signal Conversion (7)6.RS485Modbus Protocol (8)6.1Modbus Protocol (8)6.2Modbus Register (9)6.3Modbus Register Detail Description (12)7.Software Configuration Utility (20)1.IntroductionS-PH-01transmitter measures the PH of solution or semi-solid substrate.The output signal can be RS485and Analog Voltage.The sensor is applicable for industrial,water processing,sewerage system,irrigation,smart agriculture etc.■Can be used for PH measurement ■Output Interface with RS485,Voltage ■High impedance and isolated electrode input ■High accuracy with excellent stability■Reverse power protection and Built-in TVS/ESD protectionSpecificationsOutput Interface Analog Voltage 0-2V(Output resistance ~0ohm)RS485Modbus-RTU Power Supply 3.9-30V/DC 3.9-30V/DC Power Consumption 35mA@24V DC 35mA@24V DCStart-up time <2secondsPH Measurement High impedance and isolated input;Range:0-14PH,Resolution:0.01PH,Accuracy:+/-0.1PH;Can be used for solution or semi-solid substrate Temperature Measurement (Option)Range:-40~80°C,Resolution:0.1°C,Accuracy:+/-0.5°C IP Ratings Electrode:IP68;Transmitter:IP65Operating Temperature -40~85°CInstallationElectrode:3/4"NPT screw threads;Transmitter:Mounting holeCable Length Power and Signal Cable:2meters or Customize;Electrode Cable:5mete rsDimensionElectrode:Width*Diameter 160*30mm;3/4"NPT screw threads Transmitter:140mm*65mm*50mm2.Wiring diagramsType Wiring diagram Analo gVoltag eOutpu tRed (V+):Power Supply +Black (G):Power Supply -Blue (O1):Analog OutputRS485ModbusRed (V+):Power Supply +Black (G):Power Supply -Yellow (T+):RS485+/A/T+White (T-):RS485-/B/T-3.DimensionElectrode DimensionTransmitter Dimension*Note:Do not put the Transmitter into the liquid.4.Installation Maintenance and Calibration4.1InstallationInstallation locations of Electrodes will vary depending on the system design.The key is to monitor a good representative sample of the whole solution directly after introduction of chlorine.The installation location must allow for complete contact of the scrubber liquid with the probes.Some example installation locations for Electrodes include the following:■Outlet of packed tower■Outlet of recycle pump■Pump bypass line■Heat Exchanger bypass line4.2MaintenanceUnder normal conditions,electrodes can last anywhere from several months to several years depending on the type of operation,rate of production,strength of product,and quality of the raw materials used in the process.Because each application is different,there is no average life expectancy.Because the pH responsive glass bulb or flat surface is relatively thin,care should be taken so that the bulb does not become scratched or broken.It is also important that ORP measuring surfaces are not scratched or gouged.The suggestions in this sheet are intended to help avoid these problems.Coating of an electrode’s measuring surface can lead to erroneous readings including shortened span and slow response times.The type of coating determines the type of cleaning technique.Soft Coatings can be removed by vigorous stirring,by use of a squirt bottle or,very carefully,by gently wiping with a soft,clean non-abrasive paper or cloth.Hard Coatings should be chemically removed.The chemical used to remove the coating should be the least harsh chemical that dissolves the coating in1or2minutes and does not attack the electrode’s materials of construction.For example,a calcium carbonate coating might be removed with5%HCl(muriatic acid).Oily or Organic Coatings are best removed with detergents or an appropriate solvent that does not attack the electrode’s materials of construction.For example,isopropyl alcohol might be used but acetone should be avoided if the electrode’s body is made of CPVC.5.Output Signal ConversionPH output conversionOutput Interface Parameters Range Conversion FormulaAnalog Voltage Output0-2V PH range:0-14PH PH=7.00*VOLTAGE.When VOLTAGE=1.0V,thenPH=7.00*1.00=7.RS485 Modbus-RTU PH range:0-14PH PH=(REGISTER VALUE)/100.When REGISTERVALUE=7000,then PH=7000/100=7.00. Temperature range:-40-80°C TEMPERATURE=(REGISTERVALUE)/100.WhenREGISTER VALUE=2013,then TEMPERATURE=2013/100=20.13°C.NOTE:The unit of VOLTAGE is(V)6.RS485Modbus Protocol6.1Modbus ProtocolModbus Protocol is widely used to establish master-slave communication between intelligent devices or sensors.A MODBUS message sent from a master to a slave contains the address of the slave,the function code(e.g.'read register'or'write register'),the data,and a check sum(LRC or CRC).The sensor is RS485interface with Modbus protocol.The default serial communication settings is slave address1,modbus rtu,9600bps,8databits and1stop bit.All communication settings can be changed with modbus command,and take effective after re-power up the sensor.Following modbus function code are supported by sensor.Modbus Function Code0x03:used for reading holdingregister.Modbus Function Code0x04:used for readinginput register.Modbus Function Code0x06:used for writing single holding register.Modbus Function Code0x10:used for writing multiple holdingregister.6.2Modbus RegisterParameters RegisterAddr.(HEX/DEC)DataTypeModbusFunctionCode(DEC)Range and Comments DefaultValueTEMPRATURE0x0000/0INT16RO 3/4-4000-8000for-40.00~80.00°C.N/APH PHVALUE 0x0001/1UINT16RO3/40-1400for0.00-14.00N/ATEMPCOMPENSA TEE N 0x0020/32UINT16R/W3/6/160:ExternalTemperature sensor1:Disabled2:On boardtemperature sensor1PHCALIBRAWAD0 PH calibration point for PH=4.010x0030/48UINT16R/W3/6/16-2000~2000for-2000~2000;Write0xFFFF tocalibrate.N/APHCALIBRAWAD1 PH calibration point for PH=7.000x0031/49UINT16R/W3/6/16-2000~2000for-2000~2000;Write0xFFFF tocalibrate.N/APHCALIBRAWAD2 PH calibration point forPH=10.010x0032/50UINT16R/W3/6/16-2000~2000for-2000~2000;Write0xFFFF tocalibrate.N/ASLAVEADDRESS0x0200/512UINT16R/W3/6/160-2551or12BAUDRATE0x0201/513UINT16R/W 3/6/160-60:1200bps1:2400bps2:4800bps3:9600bps4:19200bps5:38400bps3:9600bpsPROTOCOL0x0202/514UINT16R/W 3/6/160-10:Modbus RTU0:Modbus RTUPARITY0x0203/515UINT16R/W 3/6/160-20:None1:Even2:Odd0:NoneParityDATABITS0x0204/516UINT163/6/1611:8databitsR/W1:8databits STOPBITS 0x0205/517UINT16R/W 3/6/160-10:1stopbit 1:2stopbits0:1stopbitRESPONSEDELAY 0x0206/518UINT16R/W 3/6/160-255for 0-2550milliseconds 0ACTIVEOUTPUTINTE R VAL0x0207/519UINT16R/W3/6/160-255for 0-255seconds.NOTE:UINT16:16bit unsigned integer,INT16:16bit signed integer NOTE:RO:Register is Read Only,R/W:Register is Read/Write NOTE:HEX is Hexadecimal (data with 0x/0X prefix),DEC is Decimal6.3Modbus Register Detail DescriptionTEMPERATURE Data Range-4000-8000For -40.00~80.00°CDefault:N/APower Down Save N/ANote:Temperature value (Binary complement).Example:When REGISTER =0x0702(HEX format),thenVALUE=(0x07*256+0x02)/100=17.94°C.When REGISTER=FF05H (HEX format),then VALUE=((0xFF*256+0x05)-0xFFFF-0x01)/100=(0xFF05-0xFFFF-0x01)/100=-2.51°C.PH VALUE Data Range0-1400for 0-14.00PHDefault:N/APower Down Save N/ANote:PH valueExample:When REGISTER =0x02BC (HEX format),then VALUE=(0x02*256+0xBC)/100=7.00PHTEMPCOMPENSATEEN Data Range0:External Temperature sensor 1:Disabled2:On board temperature sensorDefault:1Power Down Save YESNote:Temperature compensationPHCALIBRAWAD0Data Range-2000~2000Default:N/APower Down Save YESNote:PH calibration AD value for PH=4.01;Immerse the electrode into PH=4.01solution and wait until the reading value being stable,then write 0xFFFF to this register to calibrate.PHCALIBRAWAD1Data Range-2000~2000Default:N/APower Down Save YESNote:PH calibration AD value for PH=7.00;Immerse the electrode into PH=7.00solution and wait until the reading value being stable,then write 0xFFFF to this register to calibrate.Data Range-2000~2000Default:N/APower Down Save YESNote:PH calibration AD value for PH=10.01;Immerse the electrode into PH=10.01solution and wait until the reading value being stable,then write 0xFFFF to this register to calibrate.SLAVEADDRESS ---Modbus Slave Address Data Range0-255Default:1or 12Power Down Save YESNote:Please re-power on the sensor to take effective after set.BAUDRATE ---Serial Comm Baudrate Data Range0-50:1200bps 1:2400bps 2:4800bps 3:9600bps 4:19200bp s5:38400bpsDefault:3Power Down Save YESPROTOCOL ---Serial Comm Protocol Data Range0:Modbus RTUDefault:0Power Down Save YESNote:Please re-power on the sensor to take effective after set.PARITY ---Serial Comm Parity Data Range0-20:NONE 1:EVEN 2:ODDDefault:0Power Down Save YESNote:Please re-power on the sensor to take effective after set.DATABITS ---Serial Comm Databits Data Range11:8databitsDefault:1Power Down Save YESNote:Please re-power on the sensor to take effective after set.STOPBITS ---Serial Comm Stopbits Data Range0-10:1stopbit 1:2stopbitsDefault:0Power Down Save YESNote:Please re-power on the sensor to take effective after set.RESPONSEDELAY ---Serial Comm Response Delay Data Range0-255for 0-2550milliseconds,0for disabledDefault:0Power Down Save YESNote:Sensor will delay a period before response to master request command.Example:When set to 5and receive a request from master device,then sensor will delay 5*10ms=50ms,then response to master.ACTIVEOUTPUTINTERVAL ---Serial Comm Active Output Interval time Data Range0-255for 0-255seconds,0for disabledDefault:0Power Down Save YESNote:Please re-power on the sensor to take effective after set.Note:Sensor will output thedata actively without any master request command.Note:Only ONE sensor should be on RS485network,or there will be data collision and corrupt the data on line.Note:Use key button to restore the serial comm parameters factory value to exit the active output mode.Example:When set to 5then sensor will output the data every 5seconds without any master request command.6.4Modbus Function CodeFor description below,data started with 0X/0x means that it’s in HEX format.6.4.1Function Code 3Protocol ExampleMaster Request:AA 03RRRR NNNN CCCCAA 1byte Slave Address,0-2550x031byte Function Code 3RRRR 2byte Starting Register Addr NNNN 2byte Quantity of Register to read CCCC2byteCRC CHECKSUMSlave Response:AA 03MM VV0VV1VV2VV3…CCCCAA 1byte Slave Address,0-2550x031byte Function Code 3MM 1byte Register Data Byte Count VV0,VV12byte Register Value (High8bits first)VV2,VV32byte Register Value (High8bits first)……Register Value (High8bits first)CCCC2byteCRC CHECKSUMExample:Read register 0x0200-0x0201,that is slave address and baudrate.Master Request:010*********C5B3Slave Response:01030400010003EB F2Slave Addr.1byte0x01Slave Addr.1byte 0x01Function Code 1byte 0x03Starting Register Addr.2byte0x0200Quantity of Register to read 2byte0x0002Checksum2byte0xC5B3Function Code1byte0x03 Register Data ByteCount1byte0x04Register Value: Address 2byte0x00(HIGH8Bits)0x01(LOW8Bits)Register Value: Baudrate 2byte0x00(HIGH8Bits)0x03(LOW8Bits)Checksum2byte0xEBF26.4.2Function Code4Protocol Example Master Request:AA04RRRR NNNN CCCCAA1byte Slave Address,0-2550x041byte Function Code4RRRR2byte Starting Register AddrNNNN2byte Quantity of Register to readCCCC2byte CRC CHECKSUMSlave Response:AA04MM VV0VV1VV2VV3…CCCC AA1byte Slave Address,0-2550x041byte Function Code4MM1byte Register Data Byte CountVV0,VV12byte Register Value(High8bits first)VV2,VV32byte Register Value(High8bits first)……Register Value(High8bits first)CCCC2byte CRC CHECKSUM Example:Read register0x0000-0x0002,that is temperature,PH value.Master Request:01040000000271CBSlave Addr.1byte0x01Function Code1byte0x04Starting RegisterAddr.2byte0x0000Quantity ofRegisterto read2byte0x0002 Checksum2byte0x71CB Slave Response:01040408C3029E8910 Slave Addr.1byte0x01Function Code1byte0x04Register Data ByteCount1byte0x04Register Value: Temperature 2byte0x08(HIGH8Bits)0xC3(LOW8Bits)Register Value: PH 2byte0x02(HIGH8Bits)0x9E(LOW8Bits)Checksum2byte0x8910 Temperature=(0x08*256+0xC3)/100=2243/100=22.43°C PH=(0x02*256+0x9E)/100=670/100=6.70PH6.4.3Function Code6Protocol Example Master Request:AA06RRRR VVVV CCCCAA1byte Slave Address,0-2550x061byte Function Code6RRRR2byte Register Addr(High8bits first)VVVV2byte Register Value(High8bits first)CCCC2byte CRCCHECKSUMSlave Response:AA06RRRR VVVV CCCCAA1byte Slave Address,0-2550x061byte Function Code6RRRR2byte Register Addr(High8bits first)VVVV2byte Register Value(High8bits first)CCCC2byte CRC CHECKSUMExample:Write Register0x0020,that is set temperature compensationRequest:0106002000008800Slave Addr.1byte0x01Function Code1byte0x06Register Addr.2byte0x0020(High8bits first)Register Value2byte0x0000(High8bits first)Checksum2byte0x8800Response:0106002100011800Slave Addr.1byte0x01Function Code1byte0x06Register Addr.2byte0x0020(High8bits first)Register Value2byte0x0000(High8bits first)Checksum2byte0x88006.4.4Function Code16Protocol Example Master Request:AA10RRRR NNNN MM VVVV1VVVV2…CCCC AA1byte Slave Address,0-2550x101byte Function Code0x10RRRR2byte Starting Register AddrNNNN2byte Quantity of Register to writeMM1byte Register Data Byte CountVVVV12byte Register Value(High8bits first)VVVV22byte Register Value(High8bits first)……Register Value(High8bits first)CCCC2byte CRC CHECKSUMSlave Response:AA10RRRR NNNN CCCCAA1byte Slave Address,0-2550x101byte Function Code0x10RRRR2byte Starting Register AddrNNNN2byte Quantity of Register to writeCCCC2byte CRC CHECKSUMExample:Write Register 0x0200-0x0201,that is set slave address to 1,and baudrate to 19200bp.Master Request:0110020000020400010004BACCSalve Response:01100200000240700x011byte Slave Addr.0x10(HEX)1byte Function Code 0x100x02002byte Starting Register Addr(High8bits first)0x00022byte Quantity of Register to write(High8bits first)0x40702byteCRC CHECKSUM0x011byte Slave Addr.0x10(HEX)1byte Function Code 0x100x02002byte Starting Register Addr 0x00022byte Quantity of Register to write 0x041byte Register Data Byte Count 0x00012byte Register Value:Slave Address 10x00042byte Register Value:Baudrate 19200bps 0xBACC2byteCRC CHECKSUM7.Software Configuration UtilityYou can use software listed below to try reading/writing the register of sensor: https:///ed-chemnitz/qmodbus/releases/User Guide8.Document VersionVersion Date Description EditorV2.0First editionV2.111/18/2022Add Note in chapter3Kelvin.Lee。
艾默生PH 选型手册
测量参数 测量范围 测量精度
pH 0-4pH ± 0.01pH
ORP -1500 - +1500mV ± 1mV
1056双通道智能分析仪
选型代码 电源
01 115/230VAC，50/60Hz，不带继电器
02 24VDC，带4个报警继电器
03 85-265VAC通用电源，50/60Hz，带4个报警继电器
选型代码 测量通道1
20 接触电导率
接触电导率/溶解氧双通道：1056-01-20-35-AN，1056-02-20-35-AN，1056-03-20-35-AN
环形电导率/pH双通道：1056-01-21-32-AN，1056-02-21-32-AN，1056-03-21-32-AN
环形电导率/溶解氧双通道：1056-01-21-35-AN，1056-02-21-35-AN，1056-03-21-35-AN
1056-03-20-30-AN，1056-03-20-38-AN
环形电导率：1056-01-21-31-AN，1056-01-21-38-AN
1056-02-21-31-AN，1056-02-21-38-AN
1056-03-21-31-AN，1056-03-21-38-AN
总氯 0-20ppm ± 1%
一氯胺 0-20ppm ± 1%
溶解氧 0-20ppm ± 1%
杭州固特科技有限公司，艾默生过程自动化产品,浙江省代理商
罗斯蒙特1056变送器，Rosemount 1056变送器，罗斯蒙特1056 pH变送器，Rosemount 1056电导率变送器，罗斯蒙特 1056溶氧变送器
1056 双通道智能分析仪允许接 1 个或 2 个传感器，测量参数可以任意组合，从而减少分析回路成本和仪器 安装空间。测量参数的选择范围宽，适用于绝大多数工业、商业和市政应用。仪器的标准配置：2 个隔离的传 感器输入；7 种语言选择；2 个 4-20mA 输出；插拔式电源线和信号线电缆接头；4 个电缆进线孔（现场开孔） 和盘装仪表安装附件。
ph传感器工作原理
ph传感器工作原理
pH传感器是一种常用的电化学传感器，用于测量溶液的酸碱度。
它的工作原理基于溶液中氢离子（H+）的浓度与电势之间的关系。
pH传感器通常由两个电极组成：一个是感应电极，另一个是参比电极。
感应电极由玻璃制成，内部充满了一种特殊的电解质溶液。
当感应电极浸入溶液中时，溶液中的氢离子会与电解质溶液中的离子发生交换，从而导致电离质溶液内部的电位变化。
参比电极通常由银银氯化物电极构成，它提供了一个稳定的参考电位，以便与感应电极进行比较。
通过测量感应电极与参比电极之间的电势差，可以计算出溶液中氢离子的浓度，进而确定溶液的酸碱度。
为了确保准确测量，pH传感器需要定期校准。
校准通常涉及将传感器浸入已知pH值的标准缓冲液中，并根据测量结果进行调整。
pH传感器广泛应用于许多领域，包括环境监测、食品和饮料生产、医疗诊断等。
通过监测溶液的酸碱度，pH传感器可以提供重要的信息，用于控制和调整各种过程，以确保产品质量和环境安全。
总之，pH传感器的工作原理是基于感应电极与参比电极之间的电势差，通过测量溶液中氢离子的浓度来确定溶液的酸碱度。
它是一种广泛应用的传感器，可在许多领域提供准确的酸碱度测量。
艾默生Ph计中文说明书
艾默生Ph计中文说明书一、产品介绍二、功能特点1.高精度：艾默生Ph计采用先进的传感器技术，能够提供非常准确的测量结果。
2.多功能：艾默生Ph计不仅可以测量水中的酸碱度，还可以测量温度、离子浓度等参数。
3.显示便捷：艾默生Ph计采用大屏幕液晶显示屏，显示结果清晰易读。
4.数据记录：艾默生Ph计内置存储器，可以记录多次测量结果，并通过USB接口与电脑相连，方便数据的传输和分析。
5.自动校准：艾默生Ph计具备自动校准功能，可以根据标准溶液进行校准，提高测量的准确性。
6.电池寿命长：艾默生Ph计采用低功耗设计，电池寿命长达数年。
三、使用方法1.打开电源开关，等待仪器自行校准。
2.将测量电极浸入待测液体中，搅拌几秒钟，使测量尖端充分与液体接触。
3.抬起电极，将其放在空气中，等待数秒钟，直至仪器读数稳定。
4.记录测量结果。
5.清洗电极：用纯净水冲洗测量电极，把测量电极放入盐溶液中浸泡几分钟，再用纯净水冲洗干净。
四、注意事项1.使用前，请检查电池电量是否充足。
2.使用过程中，避免将仪器暴露在阳光下，以免损坏液晶屏。
3.使用前和使用后，请仔细清洗测量电极，以确保测量结果的准确性。
4.请勿将测量电极接触带有腐蚀性溶液的容器或物体。
5.请勿使测量电极受到剧烈撞击，以免损坏电极。
6.长时间不使用时，请及时将电池取出，以免电池漏液损坏仪器。
五、维护保养1.仪器在长期存放前，请将电池取出。
2.使用完毕后，请将电极清洗干净，并用除尘布擦拭仪器表面。
3.定期校准仪器，以保证测量结果的准确性。
六、常见问题解答1.仪器无法开机：请检查电池是否安装正确，电池电量是否充足。
2.仪器显示异常：请尝试重新校准仪器。
3.仪器测量结果不准确：请检查电极是否清洗干净，是否正确使用校准液校准仪器。
METTLER TOLEDO M300系列PH变送器
METTLER TOLEDOM300系列PH变送器1.简介M300 PH变送器是一台具有单测量通道的在线过程控制仪表，用于测量流体的PH值，它可以配合多种不同应用的梅特勒-托利多(METTER TOLEDO)传感器，并能够适应不同长度的连接电缆。
变送器具有同时显示数字和字符能力，带背光的大尺寸四行液晶显示器，可以同时显示测量数据和设置信息，简洁、灵活、清晰的菜单结够使您可以通过面板上的按键对变送器的各项操作参数进行设置，为了避免非法和末经授权的人员对设置进行修改，M300的菜单还设置了分级密码保护的菜单锁，M300变送器配置了两路模拟量输出和四路继电器触点输出，方便在过程控制系统中使用。
M300变送器还具有USB通讯接口和完备的控制指令，可以允许您通过个人电脑（PC）实时采集测量数据或对变送器进行远程监控和设置。
2.当心：本产品为四线制仪表，已使用有源4-20mA模拟输出，请勿向TB2 1~6引脚供电。
3.菜单机构Measurement modeMenu cal infoMenuQulck setupConfigureMeasurementChannel setupTemperaturePHSet averagingAnalog outputsSet poinsAlarm/cleanDisplayHold outputsSystemSet languageUSBPasswordSet/clear lockoutResetPID setupPID A/MTune parametersModePID display setupServiceDiagnostlcsMode/software revisionDigital inputDisplayKeypadMemorySet relaysRead relaysSet analog outputsRead analog outputsCallbrateTech serviceCallInfoMessagesCallbration dateMode/software revision4.操作按键5.菜单树的操作通过键，键，键，进入所需的主菜单。
全面分析解决方案 - Emerson Process Management
产品解决方案
> 气相色谱分析和过程气体分析.....................16 > 排放和燃烧分析 ...........................................18 > 工业危害安全防护........................................20 > 连续在线液体分析........................................22
核算
通过对关键组分的快速测量，提 供准确的定性和定量分析，从而 更快、更好地作出可能影响运营 绩效的决策。
更准确的数据还可以改善炼油厂 和化工过程的安全性和环境监测 能力。通过精确测量有害污染物 和监测环境空气，艾默生解决
加氢装置 在炼油厂的加氢装置中，可以使用 Rosemount Analytical 过 程气相色谱仪，监测循环氢中的杂质，以便根据需要，向 补给氢中补充氢气。此外，还通过最大限度地减少成品中 的 C3 和轻组分含量，提高产品质量。
4
乙烯工厂 针对乙烯应用解决方案，Rosemount Analytical 采 用的 战略方针是限制初始资本支出，最大限度降低持续性运 营 费 用 ， 并 提 高 分 析 设 备 的 总 体 性 能 。 Rosemount Analytical 可将整个乙烯工厂的产品纯度保持在规格范 围以内，并确保最大限度地回收产品：
流程工业提高了对于能源效率的重视程度。更好地控制工 艺装置可以最大限度地减少锅炉和加热炉燃烧时产生的燃 料废气。
地方和国家环境监管机构不断施压，要求减少 NOX 及其它 污染物的排放。这对过程加热器、熔炉、锅炉、焚烧炉、 废酸炉和催化再生工艺等所有燃烧过程都提出了更高的控 制要求。
ph传感器的使用方法和注意事项
ph传感器的使用方法和注意事项
哇塞，ph 传感器可是个很重要的东西呢！那咱就来好好聊聊它的使用方法和注意事项哈。
首先，使用 ph 传感器要先进行校准，这就好比给它定个准星一样。
把传感器放入标准缓冲溶液中，根据仪器的指示进行校准操作。
然后呢，就可以把它放入要测量的溶液中啦，但要注意传感器要完全浸没哦，可别只沾个边就完事了。
测量的时候要等数值稳定了再读数，别着急忙慌的。
还有啊，使用后要及时清洗传感器，不然残留的物质会影响下次测量的准确性哟。
这些步骤和注意事项可千万不能马虎呀！
在这个过程中，安全性和稳定性那是相当重要的呀！就像走钢丝一样，得稳稳当当的。
如果操作不当，不仅会得到错误的结果，还可能损坏传感器呢。
所以一定要小心谨慎，按照要求来操作。
只有这样，才能保证测量的顺利进行，让我们得到可靠的数据呀。
ph 传感器的应用场景那可多了去了！在化工、环保、食品等领域都大显身手呢。
它的优势也很明显呀，能够快速、准确地测量溶液的 ph 值，这就好比有了一双火眼金睛，能一下子看穿溶液的性质。
这多厉害呀！而且它操作起来也相对简单，不需要特别复杂的技能和知识。
咱就说个实际案例吧，在食品加工中，ph 传感器可以用来监测食品的酸碱度，确保食品的质量和安全。
比如在制作酸奶的时候，就需要严格控制ph 值，这时候 ph 传感器就能发挥大作用啦，能让酸奶的口感和质量都棒棒哒！你说这效果好不好？
总之呀，ph 传感器真的是个超级实用的好东西，只要我们正确使用它，注意那些事项，它就能为我们的工作和生活带来很多便利和好处呢！。
艾默生 5081两线制分析变送器
两线制分析变送器两线制分析变送器（（适用于pH 、ORP 、电导率电导率、、氧、臭氧和氯臭氧和氯））两线制两线制变送器变送器 --- 5081系列产品• 两种通讯协议可供选择两种通讯协议可供选择：：HART 通讯或FF 现场总线现场总线；；• 两行大屏幕显示两行大屏幕显示，，清晰清晰、、易懂易懂，，分别显示被测工艺参数和 过程温度过程温度；； • 菜单结构简单菜单结构简单；；• 坚固的外壳设计满足NEMA 4X 和NEMA 7B 防护等级防护等级；； • 本安设计使变送器适用于爆炸环境本安设计使变送器适用于爆炸环境（（选择适配的安全栅的安全栅）；）； •在电源故障情况下在电源故障情况下，，非易失存储器保存程序设置内容和标 定数据定数据。
性能和应用5081系列分析变送器可以检测的参数包括：pH 、ORP 、电导率（连接接触电导率传感器和环形电导率传感器）、电阻率、溶解氧（ppm 级和ppb 级）、总氯、余氯和溶解臭氧。
5081可以与Rosemount Analytical 的绝大多数传感器配套使用，有关详细内容，请见技术规格说明。
5081变送器是铸铝喷环氧聚酯外壳，坚固，全天候，防腐蚀，满足NEMA 4X 和IP65防护等级，也满足NEMA 7B 防爆标准。
5081变送器有两行LCD 显示。
第一行显示字符高0.8英寸（20毫米），显示主要测量参数，如pH 、电导率等。
第二行显示字符高0.3英寸（7毫米），显示次要测量参数，如温度；如果检测余氯，则显示pH 值。
5081变送器有两种可供选择的数字通讯方式：HART 通讯（选型代码-HT ）和FF 现场总线（选型代码-FF ）。
这两种通讯方式都可以使用AMS 软件（设备管理程序），通过AMS 软件，借助于个人计算机或工厂主机，操作人员可以对变送器进行设置、组态、读取过程变量和诊断故障。
手持红外遥控器或HART 375手操器也可以对变送器进行组态和标定。
SE555 系列 pH 值传感器操作说明书
1c1b SE555 系列 pH 值传感器操作说明书请阅读本操作说明书，注意技术数据并遵守安全提示。
1 安全提示1.1 所有使用区域 — 所有型号的传感器根据使用地点的不同，压力、温度、 腐蚀性介质或爆炸性气体均可能造成危险。
因此，传感器的安装、操作和维护必须由经过系统运营商授权和培训的人员进行。
1.2 易爆区域 — 所有型号的传感器必须遵守安装所在地适用的关于在易爆区域安装电气设备的规定和标准。
用于参考：IEC 60079-14、欧盟指令 2014/34/EU 和 1999/92/EC (ATEX)、NFPA 70 (NEC)、ANSI/ISA-RP12.06.01。
必须遵守传感器的电气参数和热学参数。
1.3 易爆区域 — 带 Memosens 插接头的传感器Memosens 防爆传感器标有橙红色环。
连接有 CA/MS-***X** 型或 CA/MS-***X**-L 型测量电缆的传感器，或连接有硬件和功能方面完全相同且经认证测量电缆的传感器，可按 BVS 15 ATEX E141 X 和 IECEx BVS 15.0114X 证书所述，连接适当的测量设备。
1.4 易爆区域 — 带 VP 插接头的传感器只允许在不接地的本质安全电路上， 用经批准的设备操作传感器。
2 用途该传感器用于对液体介质中的 pH 值和氧化还原电位（AMSN 型）进行连续测量。
SE555 传感器的维护量极低，带有加压电解液和用于自动温度补偿的内置温度探头。
它可以通过高压灭菌进行消毒， 并兼容 CIP 和 SIP。
该传感器针对工业过程而设计： •卫生过程•生物技术、食品、制药 •高温、高 pH 值、电镀3 安装和调试•请在拆开包装时，检查传感器是否有机械缺陷。
如有任何损坏，请告知您的 Knick 服务团队。
•取下保湿帽，用附带的小刀拆下膜片的硅胶密封。
用纯净水短暂冲洗传感器。
冲洗后，传感器仅需擦干即可。
由于静电充电，反复擦拭 pH 敏感玻璃会大大增加响应时间。
PH传感器使用说明
PH传感器使用说明一、PH传感器基本原理1.酸碱指数（PH值）是描述溶液酸碱程度的量度，其值范围在0-14之间，其中7表示中性，小于7表示酸性，大于7表示碱性。
2.PH传感器通过测量电极表面的氢离子（H+）浓度来确定溶液的PH 值，通常由玻璃电极和参比电极组成。
3.玻璃电极是最关键的部分，其表面涂有特殊液体，并与环境中的H+离子发生化学反应，产生微小电流，进而转换成PH值。
二、PH传感器的安装1.安装前确认传感器是否完好无损，检查电极是否干净，没有残留物。
2.将PH传感器插入需要测试溶液中，确保电极与溶液充分接触，而不受泡沫、气泡的干扰。
3.可根据需要选择将PH传感器固定在容器的底部或悬挂在容器中，确保传感器的稳定性和准确性。
三、PH传感器的校准1.在使用前，需要进行PH传感器的校准，以确保准确的测量结果。
一般来说，校准时使用标准缓冲溶液（PH4.01、PH7.01和PH10.01）进行三点校准更为准确。
2.将PH传感器分别放入标准缓冲溶液中，等待PH值稳定后，按照说明书进行校准操作。
3.校准过程中，确保PH传感器充分浸泡在溶液中，并在校准完成后用纯水进行冲洗干净。
四、PH传感器的使用注意事项1.避免将PH传感器暴露在极端温度下，以免影响传感器的精度和使用寿命。
2.PH传感器不宜与氧化剂、酸或碱性液体接触，以免损坏传感器。
3.使用过程中，避免将PH传感器强烈震动或撞击，以防传感器损坏或失效。
4.长期不使用时，应将PH传感器放在干燥的环境中，并用保护盖或保护液体盖住电极，以延长传感器的寿命。
5.定期清洗PH传感器，以去除可能附着在电极表面的污垢和沉积物。
6.若PH值较低（酸性溶液），可以在PH传感器的电极表面涂覆一层硅脂，以提高传感器的使用寿命。
五、PH传感器的维护与保养1.定期检查PH传感器的外观和电极状态，如发现损坏或异常，及时更换或维修。
2.根据使用频率和使用环境的不同，选择合适的时间间隔进行校准和调整。