AreaRAE Plus & AreaRAE Pro User’s Guide
102
Verifying the Stall High Setting
Exit Diagnostic Mode. In Normal Mode, with the pump at high speed, block the inlet. The pump should
stall after a few seconds, sending the instrument into alarm. This tells you that the pump’s Stall High
setting is correct.
If the gas inlet is blocked but the pump does not shut down, or the pump shuts down too easily with a
slight blockage, the pump stall threshold value may be set too high or too low.
If the pump does not stall or send the instrument into alarm, then there may be a leak in the gas inlet
or the pump is weak or defective and should be replaced.
Stall Low Threshold Setting - Static
In Diagnostic Mode, press the [MODE] key repeatedly until the “Pump” screen is displayed. “Low”
should be highlighted. Otherwise, press [Y/+] to select the “Low” value.
The Idle (shown as a value for “I”) value should be 100 to 200. Record the value.
Block the inlet, and record the value after it goes up.
The blocked value minus the idle (unblocked) value should be greater than 100 counts:
(Blocked value – Unblocked value) > 100
If it is greater than 100, then the pump is working correctly and tubing leading from the inlet is not
leaking.
To set the Low value, first add the blocked and unblocked values and divide by 2:
(Blocked value + Unblocked value) / 2 = correct Stall Low value
Then, using the [Y/+] and [N/-] keys, set the Stall Low value to this number.
Verifying the Stall Low Setting - Static
Exit Diagnostic Mode. In Normal Mode, block the inlet. The pump should stall after a few seconds,
sending the instrument into alarm. This tells you that the pump’s Low setting is correct.
If the gas inlet is blocked but the pump does not shut down, or the pump shuts down too easily with a
slight blockage, the pump stall threshold value may be set too high or too low.
If the pump does not stall and send the instrument into alarm, then there may be a leak in the gas inlet
or the pump is weak or defective and should be replaced.
Important! When you are done setting thresholds, exit Diagnostic Mode and test the instrument before
actual use.
19.5 Exit Diagnostic Mode
Hold [MODE] until the AreaRAE Plus/Pro shuts off. When you start it up again, it is in normal operating
mode.
To Next Page
Loading...
