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RETRACTING AND INSERTING THE MODEL 140 SENSOR
RETRACTING THE SENSOR
1. Push in on the sensor junction box and slowly loosen the sensor compression fitting nut by reversing the
sensor tightening procedure illustrated in Figure 2.
2. When the sensor compression nut is completely unscrewed, slowly ease the sensor out until the flared tip
of the electrode rests firmly within the body of the compression fitting body.
3. Close the ball valve completely.
4. Unscrew the compression fitting body from the reducing bushing and remove the sensor from the ball valve
assembly.
Before removing the sensor be sure the ball valve is
completely closed.
Model 140 sensors are retractable. BEFORE
RETRACTING THE SENSOR, be absolutely certain
the process pressure is less than 100 psig (791 kPa
abs) and the process temperature is at a safe level!
CAUTION
CAUTION
MODEL 140,141, and 142 sensors WIRING
6
INSERTING THE SENSOR
1. DO NOT open the ball valve.
2. Thread the sensor compression fitting body into the reducing bushing in the rear of the ball valve and tighten.
NOTE: Do not push past this point. Damage to the sensor could result.
Make sure process O-ring is clean, lubricated, and in
place before installing sensor. Replace if worn.
The system pressure must be less than 100
psig (791 kPa).
WARNING
WARNING
CAUTION
If the sensor comes free of the valve, refer to
Figures 2 and 13 and verify that the valve and
associated fittings are as shown. Do not proceed
until the sensor is correctly restrained.