How to connect the cable to the OTT FAD 5:
Caution:
䊳 Only remove the transport protection for the pressure probe cable immediately
before connecting!
䊳 Do not damage the pressure compensation capillary, do not block it, and protect
it from contamination and humidity!
䡵 Feed the pressure probe cable through a cable gland on the OTT FAD 5.
䡵 Only if the OTT FAD 5 is used as the fixing point for hanging the OTT PLS:
secure ring terminal with the Phillips screw and put the pressure probe cable
under tension.
䡵 Tighten the cable gland firmly by hand.
䡵 Remove approx. 80 … 100 mm of the insulation of the datalogger connection
cable/electrical supply.
䡵 Feed the connection cable through the second cable gland on the OTT FAD 5
and tighten the cable gland firmly by hand.
䡵 Connect the wires of both cables with each other appropriately: To do this,
c
ompletely open the connectors (raise orange lever by approx. 90 °), insert
wires with 10 mm insulation removed, close lever. Size range 0.08 … 2.5 mm
2
.
Fine-wired conductors do not require end sleeves. For wire allocation, see
sticker on the housing lid of the OTT FAD 5.
How to insert the dessicant cartridge and check it:
䡵 Insert the dessicant cartridge into the shaped foam part. The coloured indicator
must be orange!
䡵 Immediately replace the housing lid and secure with the four captive screws.
䡵 C
heck the colour of the coloured indicator at regular intervals.
The intervals are heavily dependent on the atmospheric humidity present.
Recommendation: after initial installation, check at monthly intervals. Afterwards
the intervals can be adapted to the local conditions. Take seasonal climate
changes into account.
䡵 Follow the directions on the slip enclosed with the dessicant cartridge to regen-
erate the dessicant cartridge.
Information on the functional principle of the dessicant cartridges:
The air entering the humidity absorbing system through an air-permeable mem-
brane in the side wall of the OTT FAD 5 is dried by the dessicant cartridge. This
prevents humid air from entering the pressure compensation capillary as a result
of temperature and air variations. Humidity could block the pressure compen -
sation capillary due to the formation of condensation and lead to inaccurate
measurement results.
The dessicant cartridge contains silica gel with a coloured indicator. It has the
property of extracting water from the surrounding air and is therefore used for
drying air that is contained in a device. Due to the coloured indicator, the silica
gel is orange when dry and white when wet. Once the silica gel has become
white, it can no longer keep the air dry and must be exchanged for a dessicant
cartridge with orange silica gel.
31
To Next Page
Loading...
