ENMET Venturi Gas Sampler - Manual (Page 5)

Venturi Module ENMET Corporation
3
2.2 Installation of MOS/Combustible Sample Draw Adapter
Proper operation and gas detection require that there be no leaks in the system.
To insure proper operation a seal must be formed between the MOS sensor or Combustible sensor and the sample draw adapter.
This is accomplished with the use of Teflon Tape.
Steps to Teflon Tape sensor and adapter:
1. Wrap the threads of the MOS sensor with Teflon tape, 4 to 6 complete rotations. Be sure to pull the tape tight as you wrap
it, to insure the tape fills the threads.
2. F OR MOS S ENSORS :
• Remove the black retaining ring from the sensor and place 1 rotation of Teflon tape around the sensor to cover the TRU-
Arc. See figure 2 and 3 sensor assembly and sensor detail below. Note the direction of the black retaining ring.
• Replace the black retaining ring and attach the sample draw adapter.
3. Tighten the sample draw adapter onto the sensor as far as possible.
4. Attach the input and output tubing to the adapter.
5. Check for leaks. With the sample draw system operating, plug the input connection to the sample draw adapter. Proper
installation will register 0 flow rate on the flow meter.
If the flow meter does not register 0, remove the sample draw adapter and re-tape it.
6. In order to remove the sample draw adapter you must first disconnect the tubing from the adapter fitting.
Press and hold the inner ring of the fitting while removing the tubing.
C AUTION : Do Not pull out the inner ring of adapter fitting. See detail of adapter fitting in figure 1.
Type 03033-XXX
Figure 2: MOS Sensor Assembly
Sample In
Sample Out
Black Retaining Ring
Sensor
See Detail
Sensor
Enclosure
Top View
Threads of MOS Sensor
Apply Teflon Tape
TRU-Arc must be covered
with Teflon Tape
Sensor
Sample Out
Sample In