Quick Start Guide
Part Number: 51A-397
Rev. G
February 2016
TUpH
For additional information, please visit our website at EmersonProcess.com/LiquidAnalysis.
Sensor/process application compatibility
The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsibility of the user.
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!
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 inteneded to be in contact with the process uid and may not meet the 500V r.m.s. a.c. test to earth. This must be taken into consideration at
installation.
Do not allow lubricant to coat electrode bulb or reference junction. If it does, wipe it clean before installation.
TM
pH Sensors
Specifications
397 performance and physical specications
pH range: AccuGlass: 0-14 pH
Wetted materials: glass, polypropylene, EP
Interconnecting cable: 15 ft. (4.6 m), for use with remote preamplier
Temperature rating: 32 to 176 °F (0 to 100 °C)
Pressure range: 100 - 790 kPa abs (0 - 100 psig)
Minimum conductivity: 75 µS/cm, nominal 100 µS/cm
Weight/shipping weight: 1 lb. / 2 lb. (0.45 kg / 0.9 kg)
Process connections: None; must use Quik-Loc kit which includes a 1 in. MNPT process connection
Quik-Loc kit physical specifications
Process connections: 1 in. MNPT
Wetted materials: 316 SST, EP, PEEK
Weight/shipping weight: 1 lb. / 2 lb. (0.45 kg / 0.9 kg)
Storage
1. It is recommended that electrodes be stored in their original shipping containers until needed.
2. Do not store at temperatures below 23 °F (-5 °C).
3. Electrodes should be stored with a protective cap containing KCL solution.
Quick Start Guide February 2016
4. For overnight storage, immerse the sensor in tap water or a pH buffer solution.
5. A pH glass electrode has 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. 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.
Sensor installation
For sensor dimensions, see Figure 1.
For recommended installation, see Figure 2.
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 the gasket shows signs of corrosion, you must replace it to
ensure a proper and secure seal between the coupler and adapter.
Quik-Loc kit A
23757-00
23757-01 2.0 in. / 50 mm
2
Sensor length
6.15 in. / 156 mm
B
Insertion depth
1.4 in. / 35 mm
February 2016 Quick Start Guide
Quik-Loc mounting
Wrap the pipe threads of the coupler with Teon 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, position the
adapter on the back end of the sensor.
Remove the paralm wrapping from the two O-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, install the retaining ring (which is included with every 397
sensor) 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 cannot be inserted completely or properly unless both arms are in the fully released position (see Figure 1).
Once the adapter has been properly placed in the coupler, position both arms in the locked position.
The sensor may obstruct ow through smaller pipes.
It is recommended that a thermometer, drain valve to release pressure, and pressure gauge be inserted near the Quik-Loc assembly (see Figure 2).
Once the Quik-Loc unit is installed, 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-Lok 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 Quik-Loc kit/397 TUpH sensor to train personnel about 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-Lok unit.
Only use the Quik-Loc unit within the pressure and temperature limits stated for the 397 sensor.
Figure 2. Recommended flow-through and insertion installation for the 397
3
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