3.QUICK START
3.1 Overview
The gas sensor module has been supplied factory cali- brated and ready for immediate installation and opera- tion. An installer familiar with installation and opera- tion of gas detection products can use this section to begin immediate use of the monitor.
3.2 Wiring
Provide three conductor wiring from the power sup- ply/control device to the sensor module location. See section 2.2 for wiring specifications.
3.3 Module Installation
Remove spring on electromechanical sensor prior to installation. See Figure below.
The module can either be installed on the end of a 3/4" conduit, or attached to a vertical surface using the mounting flange on the enclosure.
WARNING:
- The installation must meet any hazardous envi- ronment codes for electrical equipment.
-The sensor module enclosure mounting must be far enough from any vertical surface to allow re- moval and replacement of the sensor assembly which is threaded into the second 3/4" conduit hub.
3.4Wiring Connection
To gain access to the I/O PCB for wiring or mounting purposes, loosen the two captive thumb screws in the
Instruction Manual
PPM |
|
| MODEL |
| H2S PPM |
| GAS MONITOR |
Unity | FAULT |
SPAN | ZERO |
Figure 3.1
Typical Vertical Mounting on Conduit
Terminal positions on the I/O printed circuit assembly are labeled PWR (power), OUTSIG (signal), GND (TB2). Make the corresponding connections to the control device/power supply.
The sensor harness should remain connected to the I/O assembly at “TB1”.
3.5 Transmitter Installation
To install the front panel assembly, align the two thumb screws with their mating
WARNING:
- If the sensor transmitter is installed in a classi- fied hazardous area, replace the threaded cover prior to providing power.
3.6
To begin operation of the sensor module provide
Model 4105 Gas Sensor Module (12/02) | Page: 3 |
