Emerson 397 TUpH pH/ORP Sensor Instruction Sheet
Industry Manual Repository
Join the AnalyzeDetectNetwork and Read This Manual and Hundreds of Others Like It! It's Free!
TUpH pH Sensors
For additional information, please refer visit our website at www.rosemountanalytical.com.
397 Performance and Physical
Sensor/Process Application Compatibility
pH Range: AccuGlass: 0–14 pH
Wetted Materials: glass, polypropylene, EP
Interconnecting Cable: 15 ft (4.6 m), for use with remote
Temperature Rating: 0 to 100 °C (32 to 176 °F)
Pressure Range: 100–790 kPa abs (0–100 psig)
Minimum Conductivity: 75 μS/cm, nominal 100 μS/cm
Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)
Process Connections: NONE; must use Quik-Loc Kit which
includes a 1 in. MNPT Process Connection
The wetted sensor materials may not be compatible with
process composition and operating conditions.
Application compatibility is entirely the responsibility of
Quick-Loc Kit Physical Specifications
Process Connections: 1-in. MNPT
Wetted Materials: 316 SST, EP, PEEK
Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb)
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!
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
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 KCl solution.
4. For overnight storage, immerse the sensor in tap water
or 4 pH buffer solution.
5. A pH glass electrode has a limited shelf life of one year.
For recommended installation, see Figure 2
1. Remove electrode from shipping container.
2. Remove the protective boot covering the electrode
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.
Do not allow lubricant to coat electrode bulb or reference
junction. If it does, wipe it clean before installation.
For sensor dimensions, see Figure 1.
For wiring, see Figures 3 - 13.
Figure 1. Dimensional Drawings For the 397 in the Quik-Loc Unit
The EP gasket (see drawing #40039702) provided
with the coupler should be periodically inspected. If
gasket shows signs of corrosion, replacement will be
necessary to ensure a proper and secure seal between
the coupler and adapter.
6.15 in. / 156 mm
1.4 in. / 35 mm
2.0 in. / 50 mm
Wrap the pipe threads of the coupler with Teflon tape
before placing it into the process pipe. The coupler can be
connected to any 1 in. process connection and must be
mounted within 80° of vertical, with the electrode facing
down. Once the coupler is in place, the adapter should be
positioned onto the back end of the sensor.
Remove the parafilm wrapping from the two 0-rings on
the sensor, grease the o-rings with the lube provided,
and feed the sensor cable through the adapter. Once
the adapter is slipped over the sensor’s back end, the
retaining ring (which is included with every 397 sensor)
should be installed on the black, grooved, back end of the
sensor body. The retaining ring secures the sensor into the
adapter. The adapter/sensor assembly is now ready to be
inserted into the coupler. With both arms of the coupler in
the released position, insert the adapter/sensor assembly
into the coupler.
The adapter can not be inserted completely or properly
unless both arms are in the fully released position (see Figure
Once the adapter has been properly placed in the coupler, both
arms should be positioned in the locked position.
It is recommended that a thermometer, drain valve to
relieve pressure, and pressure gauge be inserted near the
Quik-Loc assembly (see Figure 2).
Once the Quik-Loc unit is installed the operator should
wait for the process to cool to a safe temperature, use the
pressure drain valve to relieve all process pressure and
observe the pressure on the pressure gauge for proper
removal of the sensor without spray or bodily injury. The
Quik-Loc kit used with the 397 TUpH sensor is not recommended for use with hazardous, corrosive, or strong
oxidizing chemicals due to a risk of spray or bodily injury.
It is the responsibility of each company using the QuikLoc Kit/ 397 TUpH Sensor to train personnel of the injury
risks associated with using a quick-release coupler that is
placed in a hot or pressurized process.
Once the arms of the coupler have been locked in position, use
tamper-evident safety wire on the metal rings of the coupler
arms to prevent unauthorized and/or untrained personnel from
using the Quik-Loc unit.
The Quik-Loc unit should be used only within the pressure and
temperature limits stated for the 397 sensor.
The sensor may obstruct flow through smaller
Figure 2. Recommended Flow-Through and Insertion Installation for the 397
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 : http://www3.emersonprocess.com/raihome/sp/liquid/wiring/XMT/
1066 and sensors with SMART preamps: http://www2.emersonprocess.com/en-US/brands/rosemountanalytical/Liquid/Sensors/
Figure 3. 397 Standard Wiring Option used with
1054A, 1054B, 2054, and Preamplifiers PN 22698-02
Figure 5. Wiring to 1181 pH Analyzer.
Figure 4. The 397 Option -62 for Wiring to 1054, 1055,
1181, 2081, 54, 54e, 81, 3081, 4081, 5081-P, Xmt-P,
SoluComp, and 2700 Preamplifier (PN 23054-03). Also
for use with remote Junction Box PN 23555-00.
Figure 6. Preparing Coax Cable for Wiring to 54e, 1055, 81, 2081, 3081, 4081, 5081, and Xmt.
Figure 7. Wiring to 2081
Figure 8. Wiring to 54e, 81, 3081, 4081, and 5081
Figure 9. Wiring to Xmt-P-XX-10
Figure 10. Wiring to 1054A, 1054B, and 2054
Figure 11. Wiring through Junction Box PN 23309-04 (03) and Remote Preamplifier
Figure 12. Wiring to 1055-01-10-22-32
Figure 13. Wiring to 1055-11-22-32 through a Remote Junction Box
Two Point Buffer Calibration
Select two stable buffer solutions (at least two pH units apart), preferably pH 4.0 and 10.0.
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 59.17 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.
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), and approximately 5% @ 120 °C (248 °F).
Credit Cards for U.S. Purchases Only.
©2013 Rosemount Analytical, Inc. All rights reserved.
Emerson Process Management
2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: (949) 757-8500
Fax: (949) 474-7250
© Rosemount Analytical Inc. 2013
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