SKC AirChek ESSENTIAL Operating Instructions Manual page 5

Relative Flow—A number between 1 and 99 that is relative to a flow rate and changes as flow is
adjusted: 1 corresponds to the minimum and 99 to the maximum flow at which the pump can be set.
Relative flow is different for each pump. In most cases, 10 ± 5 will correspond to 1 L/min and 80 ± 5 will
correspond to 5 L/min. Also displayed on the sampling screen when you touch the up or down arrow
key during a run (if Screen Lock is not activated).
Sampling Screen
Sampling Screen Indicators
Screen lock
feature activated
Note: The relative flow indicator is displayed in place of seconds on sampling screen when up or down arrow key is
touched during sampling. Also displayed on set/calibrate flow screen. See Set/Calibrate Flow Screen for details.
See Options/Modes during Sampling for details about the screen lock feature and flow fault mode.
Reading Pump Status Indicators
The status LEDs that bracket the screen display (see Figure 1) indicate pump status:
Green, flashing = Running
Red, flashing = Flow fault
Note: Status LEDs will flash red/green to indicate that the pump is out of flow tolerance just before entering flow fault
mode and during each auto-restart attempt while in flow fault mode.
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Touch the PUMP key to begin sampling.
Touch the PUMP key again to pause or stop sampling.
Flow Fault or Low Battery Fault
Elapsed run time HH:MM:SS
Form 37165 Rev 200217
Battery status
See Note
Page 5