ENMET PGD2Manual.pdf - Manual (Page 17)

ENMET Corporation PGD3-IR
14
7 P
UMPED
I
NSTRUMENTS
Instruments having the pump option are fitted with an integral pump inside the lens.
When the pump is switched on the gas sample is drawn through one sensor inlet and exhausted through the opposite sensor inlet
such that all of the sensors are exposed to the gas sample.
There are two different types of accessories available for use with pumped instruments, either an aspirator or aspirator probe.
7.1 Pump Operation
Turn the instrument on. When the normal gas display appears, press the menu key:
until the following display appears:
Press the up arrow key. The pump will start and the following display appears:
At this stage, connect the adaptors of the sampling kit into the gas inlets of the instruments. Note that the inlets are different sizes and
will only fit the appropriate gas inlet. This prevents the sampling kit being fitted incorrectly.
After the sampling kit has been tightly fitted, press the up arrow key and the following display appears:
Example :
The gas readings are masked for 10 seconds. This is because the oxygen sensor is pressure sensitive and would otherwise create a
false oxygen alarm when the pump is turned on due to the temporary pressure transient that is created.
To turn the pump off, press the menu key:
Until the following display appears:
Press the up arrow key and the following display appears:
Remove the sampling kit and then press the up arrow key.
The pump switches off and the readings are masked for 10 seconds before the display returns to normal operation.
7.2 Pump Blockage
If a blockage occurs in the sampling kit during pump operation, the instrument will activate the audio alarm and red flashing led.
This is accompanied by an alarm and fault indication.
The blockage must be located and removed before attempting further use.
If the blockage is within the instrument it must be returned to an approved workshop for dismantling and repair.
LEL 0
▌ ▌ ▌ ▌
O2 WAIT
H
2
S 0
▌ ▌ ▌ ▌
CO2 WAIT
PUMP ON
PRESS [ ] KEY
CONNECT TUBING
PRESS [ ] KEY
PUMP OFF
PRESS [ ] KEY
DISCONNECT TUBING
PRESS [ ] KEY