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17 Pump Stall Threshold Adjustment
Proper setting of the pump stall threshold is necessary so that if there is an obstruction to the
inlet, the pump will stop and the instrument will go into alarm. This prevents unwanted debris or
liquid from entering the pump and causing disruption or damage. The MultiRAE provides two
methods to set the pump stall threshold: Static and Dynamic.
Note:
The Dynamic method uses an algorithm that takes external temperature into consideration
for greater accuracy.
If it is necessary to set the pump stall threshold, you must enter Diagnostic Mode. Also,
regardless of which method is used, when you are done setting thresholds, exit Diagnostic Mode
and test the instrument before actual use.
17.1 Entering Diagnostic Mode To Set The Pump Stall Threshold
1.
Start with the instrument turned off. Hold down the [Y/+] and [MODE] keys until the
MultiRAE starts.
2.
When you see the password screen, input your 4-digit password, and then press [MODE].
3.
Once you have entered Diagnostic Mode, press [N/-] until the “Pump” screen is
displayed.
4.
Set the high and low threshold settings for pump stall using the instructions in this
section.
17.2 Selecting The Pump Stall Threshold Method
At the Pump screen, the settings are shown, including the Pump Speed and Pump Stall
Algorithm (which can be Dynamic or Static).
To change the Pump Speed or Pump Stall Algorithm setting:
1.
Press [MODE]. Either the Pump Speed or the Pump Stall Algorithm is highlighted.
2.
To change from “High” to “Low” or “Dynamic” to “Static,” press [Y/+].
Important!
The Pump Speed must be set to “High” in order to access Dynamic pump stall
settings.
Now follow directions to change the pump stall threshold values, using the method that matches
your choice of either Dynamic or Static.
