ENMET PGD2 - Manual (Page 18)

ENMET Corporation PGD2
15
6.22 Overrange Indication
If the concentration of the sampled gas exceeds the range of the sensors, the reading on the display changes to “HIGH” and the fault
indicators in the red lens section flash.
Readings are restored once the concentration falls back within the range of the sensor.
Note, however, that the flammable gas readings will permanently show “HIGH” until the instrument is switched off and then on again in
a fresh air base.
6.23 Fault Indication
The instrument is designed to continuously self-check itself for errors, either in the software or the hardware. Various fault messages
are displayed dependent on the program version and are accompanied by flashing fault indicators in the red lens section.
For example the following message is displayed if the PGD requires configuring:
Failure of a flammable gas sensor would lead to the following display:-
6.24 Aspiration
The PGD2 instrument normally relies upon the gases present in the atmosphere naturally diffusing into the instrument sensors through
the gas inlets either side of the instrument. However, for certain gases, and in some situations it is necessary to take in gas samples
from an atmosphere away from the location of the instrument, for example, from down inside a manhole or from up in the roof of an
underground tunnel.
This can be accomplished by use of the optionally available internal pump in conjunction with the specially designed sampling kits –
see Section 7.
Required Accessories:
Description ENMET Part Number
Sampling Adaptor, Stainless Steel 03700-048
Sampling Adapter PTFE 03700-050
Sampling Hose 03700-031
Sampling Probe 03700-018
Filter Assembly Hydrophobic 02612-011
PGD NOT
CONFIGURED
H
2
S 0.0
▐
LEL FAIL
CO 0
▐
O
2
20.9