ENMET PGD2 - Manual (Page 10)

ENMET Corporation PGD2
7
6.1 Switching on
To switch the instrument on, press buttons A and D together.
The instrument goes through a self-check cycle, check that the audible and visual alarms are operating and that the display shows the
following sequence: -
Note : Instruments fitted with PGD1 emulation code do not show PGD2
Note - The top line of this display will vary according to the software and instrument configuration.
*V=1.13 is the software version which may vary
After 2 seconds the display shows the date and time followed by the gas levels.
The gas level display shown depends upon the gas sensors fitted. A typical display for a 4-gas instrument is shown below: -
6.2 Switching off
To switch the instrument off, press and hold buttons A and D together until the display goes off.
6.3 Peak Readings mode
The instrument can be set to measure and hold the highest flammable and toxic gas readings and the lowest oxygen reading, this
feature is particularly useful for carrying out pre-entry testing for gas. For example, by lowering the instrument into a manhole and then
withdrawing it to observe the peak readings to ensure that it is safe to enter.
To turn Peak Readings on / off, press buttons B and C together until the display reads: -
either
or
When Peak Readings is on, the display alternates between :-
typically
and
6.4 Sentinel working mode
Because of it’s large, 360 degree visible, red alarm top, the instrument can be suspended in a hazardous area to provide protection to
more than one person. Used in this way, all personnel in the vicinity will be able to observe the change in visual flash rate should an
alarm occur.
This method eliminates both the requirement for multi-headed devices traditionally used in the past, or for additional units in order to
achieve sentinel working.
CHECKING PROGRAM
PGD2 V4.4.2PAp Da
FLAM = METHANE
DATE 10 / 04 / 07
TIME 14 : 12 : 34
H
2
S 0.0
▐
LEL 0
CO 0
▐
O
2
20.9
PEAK READINGS ON PEAK READINGS OFF
H
2
S 0.0
▐
LEL 0
CO 0
▐
O
2
20.9
PEAK READINGS