STATUS SCIENTIFIC CONTROLS
Installation, Commissioning & Routine Gas Testing
FGD10A-M Gas Detector
TD18/032
Issue:
10
Change Note:
1869
Page 12
5.1.
Cable entries
The cable entry threads are
20mm, ½” or ¾” NPT female.
The FGD10A-M enclosure is manufactured from die cast aluminium.
Therefore, the use of glands, conduit fittings and blanks made from brass
should be avoided because if moisture is present, bi-metallic corrosion may
occur due to the chemical reaction between the two materials.
Glands and fittings plated with nickel, tin or zinc will provide improved
protection but in harsh environments the use of stainless steel is
recommended.
When connecting the cores inside the unit it is beneficial to use pointed-nose
pliers to carefully guide the cable cores from the cable entries at the rear of
the enclosure towards the PCB mounted terminal connections situated near
to the front of the enclosure.
5.2.
Mounting and terminal access
The FGD10A-M should be mounted and secured using the mounting holes
on the main unit.
Figures 2 and 3 shows details of the FGD10A-M terminal connections
–
these can be accessed as follows:-.
1. Switch OFF the supply to the FGD10A-M.
2. Release the grub screw located near the lip of the enclosure
cover.
Note: It is not necessary to completely remove the grub screw
to release the enclosure front cover.
3. Remove the enclosure front cover by rotating it several times in
an anti-clockwise direction.
4. Unplug the top display board from within the enclosure by
pulling it forwards. The board is captivated by means of a nylon
wire in order to prevent it falling from the unit
– take care to
ensure that the board is not damaged during installation. See
Figure 1.
5. The terminals can now be accessed.
Store the front cover such that it cannot be damaged or the thread
contaminated with dirt.
