4�8 Refitting The Main Chassis; 4�9 Installing The Sensor Cartridge - Honeywell Midas User Manual

4.8 Refitting the Main Chassis
The main chassis can be refitted to the mounting
bracket assembly using the following steps.
1. Align the PCB at the top rear of the main
chassis with the connector located at the
top of the mounting bracket assembly
2. At the same time align the two tubes at
the bottom rear of the main chassis with
the two tubes located on the bottom of the
mounting bracket assembly.
3. Slide the chassis backwards on the
mounting bracket assembly so that the
PCB and connector and tubes engage
simultaneously. (See diagram below).
4. Ensure the PCB, connector and tubes are
fully engaged by firmly pushing the main
chassis horizontally backward on the
mounting bracket assembly
(WARNING: DO NOT PUSH ON THE LCD
AS THIS MAY CAUSE DAMAGE).
5. Align the two attaching screws located at
the bottom of the chassis with the screw
threads on the mounting bracket assembly.
6. Tighten the screws to secure the chassis
to the mounting bracket assembly.
Diagram 4-20. Refitting the chassis.
Midas
CONNECTOR
4.9 Installing the Sensor Cartridge
The Midas sensor cartridge is supplied separately
®
and needs to be fitted to the detector's main chassis.
The following steps and diagrams detail the procedure
for installing the sensor cartridge for the first time.
This procedure is carried out with the power off and
the detector cover removed.
1. Verify the part number and type of sensor
cartridge is correct for your application, then
remove sensor cartridge from its packaging.
2. Remove cap from cartridge and bias battery
(if applicable).
3. Add label for secondary gases (if necessary).
4. Align pins at the top of the sensor cartridge
with the socket in the sensor cartridge
chamber.
4-23
Gas Detector
®
PCB
TUBES
Sensor Cartridge ID Number
Gas ID Number