19
5.9 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. Remove sensor cartridge from packaging
2. Check the part number and type of sensor cartridge is correct.
3. Check the activate by date.
4. Align the pins at the top of the sensor cartridge with the socket in the sensor cartridge chamber.
5. Carefully push the sensor cartridge into the sensor cartridge chamber until fully home.
6. Lock the sensor cartridge in place using the tabs either side of the sensor cartridge to lock the sensor
cartridge to the main chassis.
7. Switch the power switch located on the terminal module to the ‘on’ position.
8. Refit the detector’s cover by aligning the slots either side with the locating tabs on the mounting bracket
assembly.
9. Push the cover horizontally until home.
10. Tighten the thumbscrew located on the front panel.
Diagram 20. Installing the sensor cartridge
6 DETECTOR START UP PROCEDURES
WARNING
Prior to carrying out any work ensure local and site procedures are followed. Ensure that the associated control
panel is inhibited so as to prevent false alarms.
The following procedure should be followed carefully and only performed by suitably trained personnel.
1. Ensure the detector is wired correctly according to sections 5.6 and 5.7.
2. Ensure that the correct sensor cartridge is fitted. (If the cartridge has not been stored at room temperature,
allow one hour for equilibration.)
3. Ensure the on/off switch on the mounting bracket assembly is in the on position.
4. Apply power to the system.
5. After the start up routine the detector will display normal operating mode as shown in section 7.
6. If using a multi gas sensor cartridge refer to section 8.2.2 to ensure the correct gas id code is selected.
7. Allow the detector to stabilize using the table over to determine the maximum sensor cartridge
warm up time.
midas
Gas Senso
r Cartridge
NITROGEN TRIFL
UORIDE
NF3
PN : MIDA
S-S-HFX
SN : 02
34456670
Use by : 07
-09-2006
zellweger
analytics
HOW CARTRIDGE IS FITTED
chassis
cartridge
midas
Gas Senso
r Cartridge
NITROGEN TRIFL
UORIDE
NF3
PN : MIDA
S-S-HFX
SN : 02344
56670
Use by : 07
-09-2006
zellweg
er analytics
slots
tighten
HOW COVER IS FITTED
tabs
cartridge fitted