TROUBLESHOOTING
8-6
The pump current draw is higher when the pump is running
at the high speed than when it is running at the low speed,
so both thresholds need to be set separately. Press the
[Y/+]
key to adjust the low speed, press the
[N/-]
key to
adjust the high speed. Calculate and adjust the threshold as
follows:
1. The maximum “xxx” and minimum “zzz” raw counts of
the pump are displayed on the first row: “Pump =
xxx/zzz”. The pump stall count is displayed on the
second row: “Stall = yyy +/-.” The user can block the
gas inlet and watch the raw count reading. Note: the
firmware will hold the reading for a moment after the
blockage to allow a user read the raw count. If the
reading does not increase significantly (i.e. more than 3–
5 counts), then there may be a leak in the gas inlet or
the pump might be weak or defective.
2. Use the
[Y/+]
or the
[N/-]
key to increase or decrease
the stall value until it is the average of the idle and the
blocked counts of the maximum “xxx”. That is: “yyy”
stall
value
= (“xxx”
idle
+ “xxx”
block
) / 2.
3. Press the
[MODE]
key to exit this display. If the
threshold value is changed, a message “Save new stall
threshold?” will appear. Press
[Y/+]
to confirm the
change. Press
[N/-]
or
[MODE
] to abandon the change.
Note:
The pump threshold may also need to be adjusted
after the pump speed or the water trap filter has been
changed, or as the pump ages.
10) Serial Number
This displays the unit’s serial number.
11) Display Battery Duration Time
This display shows how long the unit has been on.
12) Communicate with a PC?
This display allows the user to transfer data between the
unit and a PC.
Summary of Contents for QRAE PLUS PGM-2000
Page 5: ...NOTE THE SYMBOL MEANS CAUTION RISK OF DANGER CONSULT OPERATION AND MAINTENANCE MANUAL ...
Page 8: ......
Page 12: ...GENERAL INFORMATION 1 4 non condensing ...
Page 33: ...OPERATION 2 20 A new datalog event is created when the datalogging is resumed ...
Page 34: ......
Page 65: ......
Page 67: ......
Page 73: ......
Page 81: ...TROUBLESHOOTING 8 8 ...
Page 83: ...APPENDIX A A 2 ü Function allowed Password required ...
Page 87: ...APPENDIX B B 3 Xylene p 2 8 1 1 Lower Explosion Limit of the gas in volume percent ...