RKI Instruments RM-5000 Series Indicator/Alarm Unit - Manual (Page 40)

5 How to Operate 5-7. User mode
RM-5000 - 40 -
This is used to perform the zero adjustment. Before starting the zero adjustment, let the detector head
(sensor) draw the zero adjustment gas and wait until the reading is stabilized.
For oxygen deficiency alarm specification (O2:0 - 25%), "1-1" is the span adjustment. In this case, the AIR
adjustment is performed, so that fresh air must be introduced to adjust it to 20.9%. For information on the
span adjustment, see “7-3. How to perform a gas calibration”.
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During maintenance
During inhibit
Lamp on
Lamp off
Lamp blinking
1-1. ZERO
Press SET key.
Present Concentration Value Display
Press the SET key to perform the
zero adjustment.
Zero Adjustment Completed
The menu returns to 1-1. ZERO
automatically.
Return to 1-1.ZERO
Return to 1-1.ZERO
* When the zero adjustment fails
CAUTION
In case of GH-5001, always perform both the zero adjustment and the span adjustment. Perform the
zero adjustment and the span adjustment in this order. If they are performed in a wrong order or
only one of them is performed, accurate gas detection cannot be ensured.