Emerson Process Management 396PVP, 369P User Manual
Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
Submersion/Insertion pH/ORP Sensors
Specifications
Sensor Type: TUpH 396P, 396 PVP; GPLR hemi or
at glass
Range: *pH: 0–14
ORP: -1500 to 1500 mv
Percent Linearity*
pH Range GPLR hemi bulb GPLR flat bulb
0 – 2 pH 94% –
2 – 12 pH 97% 98%
12 – 13 pH 98% 95%
13 – 14 pH 98% –
Pressure Range-Hemi bulb: 100–1136 kPa [abs]
(0–150 psig)
Temperature Range: 0–100 °C (32-212 °F)
Minimum Conductivity: 75 µS/cm, min; 100 µS/cm
nominal
Flow Rate: up to 2 ft/sec
Wetted Materials: Titanium, Polypropylene, EPDM,
glass; platinum (ORP only)
Process Connection: 1 in. MNPT front and rear
facing threads
Integral Cable: 396P: (-01) -25 ft; (02) -15 ft coaxial
VP8 Cable: use PN 24281-00 15ft VP8 cable
Preamplifier Options:
396P: Remote or Integral SMART (-01)
396PVP: Remote or Integral SMART (-70)
Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)
Pressure Range-Flat bulb: 100–790 kPa [abs]
(0–100 psig)
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!
WARNING
Glass electrode must be wetted at all times (in storage and in line) to maximize sensor life.
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.
CAUTION
The buffer in the protective boot may cause skin or eye irritation.
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.
TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Storage
1. It is recommended that electrodes be stored in their original shipping containers until needed.
2. Do not store at temperatures below -5 °C (23 °F).
3. Electrodes should be stored with a protective cap containing KCI solution.
4. For overnight storage, immerse the sensor in tap water or 4 pH buffer solution.
5. A pH glass electrode does have a limited shelf life of one year.
Electrode preparation
1. Remove electrode from shipping container.
2. Remove the protective boot covering the electrode bulb.
3. For pH electrode, rinse away salt lm with clean water, then shake the electrode so that the internal solution lls the
bulb, thus removing any air trapped there.
Note
Do not allow lubricant to coat electrode bulb or reference junction. If it does, wipe it clean before installation.
Installation
For sensor dimensions, see Figure 1.
For sensor orientation, see Figure 2.
For VP sensor or -02 sensor (no preamp) wiring, see Figures 3 thru 22.
For -01 sensor (with preamp) wiring, see Figures 23 thru 28.
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 specications 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 rst 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 rst 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 59.17 mV/pH. Over
time the sensor will age, both in the process and in storage, and 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.
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 30 to 60 minutes in a 5% hydrochloric acid solution.
3. Temperature effect on life expectancy: If glass electrode life expectancy is 100% @ 25 °C (77 °F), then it will be
approximately 25% @ 80 °C (176 °F).
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Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
ORP Calibration
1. After making an electrical connection between the sensor and the instrument, obtain a standard solution of
saturated quinhydrone. 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. Adjust the standardize control of the instrument to the solution value shown in the table below. 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 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 30 to 60 minutes in a 5% hydrochloric acid solution.
3. ORP (metallic) electrodes should be polished with moistened baking soda.
pH 4 Solution pH 7 Solution
Temp °C
mV Potential
20 25 30 20 25 30
268 264 260 94 87 80
Installation
Figure 1. Dimensional Drawing
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TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Figure 2. Flow Through and Insertion Installation
Figure 3. Wiring for 81
Figure 4. Wiring for 1181
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Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
Figure 5. Wiring 81 through Remote Junction Box Figure 6. Wiring 1181, 1050/1060, and 1003/1023
through Remote Junction Box
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TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Figure 7. Wiring Details of 396P-01-50 for use with and without Junction Box (PN 22719-02) for 1181, 1050, and
1060.
Figure 8. Wiring for 2081
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Figure 9. Wiring for 3081, 4081
Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
Figure 10. Wiring 2081 through Remote Junction Box
Figure 11. Wiring 3081, 4081 through Remote
Junction Box
Figure 12. Wiring for 1054 A/B and 2054
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TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Figure 13. Wiring 1054 A/B and 2054 Through a Remote Junction Box
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Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
Figure 14. Wiring 54 through Remote Junction Box
Figure 15. Wiring for 54
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TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Figure 16. Wiring Details of 396P-01-54 for use with and without Junction Box (PN 22719-02) for 1054, 1054A,
1054B, 2054, 2081, and Extension Cable (9200254).
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Instruction Sheet TUpH 396P and 396PVP Sensors
LIQ_MAN_ABR_396P_396PVP July 2013
Figure 17. Wiring of 396P-01-55 for use with 54, 81, 3081, and 4081.
Figure 18. Junction Box (PN 23550-00) for 54, 3081, 4081, and 81.
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TUpH 396P and 396PVP Sensors Instruction Sheet
July 2013 LIQ_MAN_ABR_396P_396PVP
Figure 19. Wiring Details of 396P-01 Gray Cable for use with 54e pH/ORP-01-09
If present, reove shrink sleeve from gray reference wire before connecting wire to terminal. For XMT and
1056, terminate Inner Drain with a wire nut.
Figure 20. Wiring Details of 396P-01 Blue Cable for use with 54e pH/ORP-01-09
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If present, reove shrink sleeve from gray reference wire before connecting wire to terminal. For XMT
and 1056, terminate Inner Drain with a wire nut.
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