General Purpose ph/orp Sensor

Transcription

1 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 General Purpose ph/orp Sensor Specifications Figure Insertion/Submersion Sensor Sensor Type: General purpose 3900 Measured Range: ph AccuGlass 0-14 ORP to mv Percent Linearity Over ph Range: Range Linearity % % % % % % % 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 EPDM Materials of ORP: Platinum Process Connections: Front facing: 3 4 and 1 MNPT Rear facing: 1 MNPT Integral Cable: 32 ft (10m) cable with integral SMART preamp; 15 ft (4.7m) cable without preamp sensor VP8 Cable: use XX, 2.5 ft (.8m) to 100 ft (31m) Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb) OPERATIONAL NOTE The 3900 Sensor responds to changes in ph at a minimum conductivity of 0.1mS/cm in deionized water. Sample flow rate must be controlled to 2 gph (7.6L/hr). The offset is approximately -0.2 ph after 3 months at ambient temperature. CAUTION: SENSOR/PROCESS APPLICATION COMPATIBILITY The wetted sensor materials may not be compatible with process com position and operating conditions. Application compat ibility is entirely the responsibility of the user. WARNING Before 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!

2 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 CAUTION 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, immediately rinse with clean water. ATEX DIRECTIVE: Special Conditions for safe use 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. Storage 1. It is recommended that electrodes be stored in their original shipping containers until needed. 2. Do not store at temperatures below -10 C (14 F). 3. Electrodes should be stored with a protective cap containing KCl solution (PN ). 4. For overnight storage, immerse the sensor in tap water or 4 ph buffer solution. 5. ph glass electrodes slowly deteriorate in storage. There is no specific expiration date. However, the calibration procedure described below should be followed to determine that the sensor calibrates properly. Electrode preparation 1. Remove electrode from shipping container. 2. Remove the protective boot covering the electrode bulb. 3. Rinse away salt film with clean water, then shake the electrode so that the internal solution fills the bulb, thus removing any air trapped there. Installation For sensor orientation, see Figure 2. For sensor dimensions, see Figure 3. For mounting options, see Figures 4-7. For wiring, see Figures For additional wiring information, please visit our website at 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 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. Allow sensor to equilibrate to the buffer temperature (to avoid errors due to temperature differences between the buffer solution and sensor temperature) and wait for reading to stabilize. Value of buffer can now be acknowledged by analyzer/ transmitter. 2. Once the first buffer has been acknowledged by the analyzer/transmitter, rinse the buffer solution off of the sensor with distilled or deionized water. 3. Repeat steps 1 and 2 using the second buffer solution. 4. The theoretical slope value, according to the Nernst equation for calculating ph, is approximately 59.1 mv/ph. Over time the sensor will age, both in the process and in storage, which will result in reduced slope values. To ensure accurate readings, it is recommended that the electrode be replaced when the slope value falls below 47 to 49 mv/ph. Recommended ph Sensor Standardization For 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 accounts for 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.

3 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Maintenance for ph electrode Electrodes 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 mild non-abrasive detergent. 2. To remove scale deposits, soak electrodes for 1 to 5 minutes in a 5% hydrochloric acid solution. 3. Temperature effect on life expectancy: If glass electrode 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). CAUTION Hydrochloric acid is toxic and highly corrosive. Avoid skin contact, wear protective gloves. Use only in a well ventilated area. Do not inhale fumes. In case of an accident, consult a doctor immediately. ORP Calibration 1. After making an electrical connection between the 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. Allow 1-2 minutes for the ORP sensor to stabilize. 3. Standardize the instrument to the solution value shown in the table, right. The resulting potentials, measured with a clean platinum electrode and Figure 2. Sensor Orientation 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 stable over 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 install in the process. Maintenance for ORP Electrode Electrodes 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 mild non-abrasive detergent. 2. To remove scale deposits, soak electrodes for 1 to 5 minutes in a 5% hydrochloric acid solution. 3. ORP (metallic) electrodes should be polished with moistened baking soda. Figure 3. Sensor Dimensions 3/4 IN MNPT 1 IN MNPT WRENCH FLATS 1.30 IN ACROSS 1 IN MNPT TEMP COMP SOLN GND REFERENCE JUNCTION ph ELECTRODE

4 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure 3. Sensor Dimensions 3/4 IN MNPT 1 IN MNPT WRENCH FLATS 1.30 IN ACROSS 1 IN MNPT TEMP COMP SOLN GND REFERENCE JUNCTION ph ELECTRODE Figure 4. Typical Flow Through insertion installation using PN Pipe Tee (sensor must be installed at least 10 above the horizon) Horizontal Pipe Tee (PN ) Pressure/Temperature Ratings psig (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) Figure 5. Low Flow Cell PN INCH MILLIMETER Inlet 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/Polycarbonate Fittings 316 SST Seals Silicone Flow cell ratings: Temperature: F (0-70 C) Max. Pressure: 90 PSIG (721 kpa [abs]) Flow rate: 2-5 GPH ( LPH) 4

5 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 6. Jet Spray Cleaner PN (sensor must be installed at least 10 above the horizon) The 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 , not shown) or can be mounted through conduit as shown below. Jet Spray Cleaner shown with 3900VP ph sensor Figure 7. Low Flow Panel PN SQP10077-LQD Low Flow Panel Specifications Inlet flow Inlet pressure Temperature 3-80 gph ( L/hr) 3 65 psig ( kpa abs)* F (0-50 C) *The minimum inlet pressure is required to open a check valve, which prevents 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. 5

6 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 NOTE For 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: and sensors with SMART preamps: Wiring_Diagram.aspx 1055: Figure and 3900VP-01 to 54epH/ORP Figure and 3900VP-02 to 54epH/ORP 6

7 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 10. Sensor Wiring 3900VP-01 gray cable to 54epH/ORP Figure 11. Sensor Wiring 3900VP-02 gray cable to 54epH/ORP 7

8 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure and 3900VP-01 to Xmt Figure and 3900VP-02 to Xmt 8

9 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 14. Sensor Wiring 3900VP-01 with gray cable to XMT Figure 15. Sensor Wiring 3900VP-02 with gray cable to Xmt 9

10 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure and 3900VP-01 to 1055 Figure 17. Two-Input and 3900VP-01 to

11 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure and 3900VP-02 to 1055 Figure 19. Two-Input and 3900VP-02 to

12 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure 20. Wiring with Remote Junction Box and Preamp (PN ) to and 3900VP-02 Figure pH/pH Wiring through Remote Junction Boxes to and 3900VP-02 12

13 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure Sensors, Preamplifier in Junction Box ID (inner drain) (No Connection Green White White/Red Red White/Gray Gray Blue Clear Orange 3900 Sensors, Preamplifier in Junction Box For and 3900VP-02 sensors Non-preamp sensors Blue Cable ID (inner drain) Connect to instrument ground or as shown 3 White (RTD Return) 3 RTD RTN /RTN 4 White/Red (RTD Sense) 4 RTD SENSE /SNS 5 Red (RTD in) 5 RTD IN 6 White/Gray (Reference Shield) 6 Ref SHLD / SHLD /GUARD 7 8 Gray (Reference in) 7 REF / REF IN Blue (Solution Ground) 8 GND/SOL GND 9 9 White/Black ( mv/ph Shield) ph SHLD / SHLD / GUARD 10 Black ( mv/ph in) 10 ph/ph in TB 1 BNC No Connection TB 2 Brown (-5VDC) Green (+5 VDC) Extension Cable PN or shown Extension Cable PN can also be used; extend color scheme from sensor or VP8 cable instead of using shown wiring scheme. -5VDC / -V SNSR +5VDC / +V SNSR Rosemount Analytical intruments: 56 / 1056 / 1057 / 1066 / 6081 Remote Junction Box PN or Sensor Head Junction Box PN (Both J-boxes include Preamplifier Board PN ) epH/ORP XMT 13

14 General Purpose ph/orp Sensor October 2014 Figure Sensors, Preamplifier in Sensor Instruction Sheet LIQ_MAN_ABR_3900 Green White White/Red Red White/Gray Gray Blue Clear Orange 3900 Sensors, Preamplifier in Sensor For and 3900VP-01 sensors Preamplifier in sensor Blue Cable Green Connect to instrument ground or as shown White (RTD Return) RTD RTN /RTN White/Red (RTD Sense) Red (RTD in) RTD SENSE /SNS RTD IN Gray (Reference in) Blue (Solution Ground) Clear ( mv/ph Shield) Orange ( mv/ph in) White/Gray (-5V) ID (inner drain) (+5V) Ref SHLD / SHLD /GUARD REF / REF IN GND/SOL GND ph SHLD / SHLD / GUARD ph/ph in -5VDC / -V SNSR +5VDC / +V SNSR Rosemount Analytical intruments: 56 / 1056 / 1057 / 1066 / epH/ORP , 3400HTVP-70, 10 XMT

15 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure Sensors, Preamplifier in Sensor 3900 Sensors, Preamplifier in Sensor, Junction Box used for extending cable For and 3900VP-02 sensors Preamplifier in sensor Blue Cable Green White White/Red Red Gray Blue Clear (Orange shield) Orange White/Gray ID (inner drain) TB TB 2 Remote Junction Box PN (with Extension board for point-to-point wiring) Inner Drain White (RTD Return) White/Red (RTD Sense) Red (RTD in) White/Gray (No connection) Gray (Reference in) Blue (Solution Ground) White/Black (mv/ph Sheild) Black ( mv/ph in) Brown (-5VDC) Green (+5 VDC) Extension Cable PN or shown. Connect to instrument ground or as shown Extension Cable PN can also be used; White/gray is replacement wire color for Brown wire. RTD RTN /RTN RTD SENSE /SNS RTD IN Ref SHLD / SHLD /GUARD REF / REF IN GND/SOL GND ph SHLD / SHLD / GUARD ph/ph in -5VDC / -V SNSR +5VDC / +V SNSR Rosemount Analytical intruments: 56 / 1056 / 1057 / 1066 / epH/ORP XMT 15

16 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure and 3900VP-01 to Models 5081, 4081 or 3081 Figure and 3900VP-02 to Models 5081, 4081 or

17 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 10. Wiring for and 3900VP-01 to 56, 1056 & 1057 ph Figure 11. Wiring for and 3900VP-02 to 56, 1056 & 1057 ph 17

18 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure 26. Sensor Wiring 3900VP-01 with gray cable to 1056/56 Figure 27. Sensor Wiring 3900VP-02 with gray cable to 1056/56 18

19 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 28. Sensor Wiring 3900VP-01 with gray cable to 1057 Figure 29. Sensor Wiring 3900VP-01 with gray cable to

20 General Purpose ph/orp Sensor October 2014 Instruction Sheet 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) 20

21 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 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) 21

22 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure 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) 22

23 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 36. Sensor Wiring 3900VP-01 with gray cable to 5081 Figure 37. Sensor Wiring 3900VP-01 with gray cable to

24 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Figure and 3900VP-01 to 6081-P Figure and 3900VP-02 to 6081-P 24

25 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Figure 40. Sensor Wiring 3900VP-01 with gray cable to 6081 Figure 41. Sensor Wiring 3900VP-02 with gray cable to

26 General Purpose ph/orp Sensor October 2014 Instruction Sheet LIQ_MAN_ABR_3900 Ordering Information The 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 temperature compensator. The sensor is available with an integral cable or VP8 connector. Junction box kits with preamplifiers can 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 preamplifier option, and is compatible with models XMT, 3081, 5081, 6081, 54e, 1055 and 1056 analyzers/transmitters ph/orp Sensor - New Generation general purpose sensor Code Preamplifier Option 01 Preamplifier 02 No preamplifier Code Measuring Electrode 10 General Purpose Low resistivity GPLR ph Glass (0-14pH) 12 Platinum ORP EXAMPLE VP ph/orp Sensor - New Generation general purpose sensor with VP Code Preamplifier Option 01 Preamplifier 02 No preamplifier Code Measuring Electrode 10 General Purpose Low resistivity GPLR ph Glass (0-14pH) 12 Platinum ORP EXAMPLE 3900VP

27 Instruction Sheet General Purpose ph/orp Sensor Sensors LIQ_MAN_ABR_3900 October 2014 Accessories Part Number Description ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector ft. cable with mating VP8 connector Jet cleaner Insertion adapter Low flow cell Junction Box with Preamplifier for Models 54e, 3081, 4081, 5081, XMT, 1055, CPVC flow through Tee, 1-1/2 in. NPT process connection Sensor handrail assembly Buffer solution, 4.01 ph, 16oz Buffer solution, 6.86 ph, 16oz Buffer solution, 9.18 ph, 16oz Extension cable, gray Extension cable, blue SQP10077-LQD Low Flow Control Panel 27

28 LIQ_MAN_ABR_3900 Rev. E October 2014 facebook.com/emersonrosemountanalytical AnalyticExpert.com twitter.com/raihome youtube.com/user/rosemountanalytical 8 Credit Cards for U.S. Purchases Only. Emerson Process Management 2400 Barranca Parkway Irvine, CA USA Tel: (949) Fax: (949) RosemountAnalytical.com 2014 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.