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Electronics 590-24 User Manual

Page 18

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A) Decimal Location:
Purpose: To change the resolution of the display. There are 2 modes that toggle when the A
key is selected.

1. 999.99 for Air Valves.

2. 9999.9 for Wheel Valves.


B) Std/Metric:
Purpose: To change the display from lb/min. to kg/min. by pressing the B key.

C) Auto Zero on/off
Purpose: To activate or deactivate the auto-zero function. The auto-zero routine will establish
zero output voltage automatically thus accommodating minor output signal voltage changes
that occur with time or temperature.

Function: To turn auto-zero function on or off press “C” repeatedly.

Auto-zero on:
When the valve is not enabled: The unit will automatically establish a zero output signal un-
less the sensor detects a signal greater than 10%. This identifies an abnormal end-of-cycle
condition indicating possible malfunction, such as a sensor not purging at end of a cycle.

When the valve is enabled: The unit will hold its last established value. Auto-zero off disables
this feature.