Bedfont NoxBox - Page 61

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Zero Calibration is automatically performed upon system power-on. The results of the zero
calibration are displayed during the set-up procedure prior to performing the system test.
Duringuse,thesystemautomaticallyremindsyouonceevery24hourstoperformthezero
calibration procedure. This helps maintain the accuracy of the monitoring system and is a regular
quick check to ensure safe performance of the system.
You can perform the zero calibration procedure at any time. To perform a zero calibration from the
mainscreen:
1. SelecttheSettingstab, 
press Sensor Zero.
The zero test will take
approximately 2 minutes to
run. A progress animation
is displayed under the test
table.
6. If all sensors perform within
 theexpectedparameters,a
 “ZeroingSuccessful” 
 messageisdisplayed,with 
green check marks against
each sensor result.
5.
2.
When entering the zero
calibration screens from either
thealarmstateagorfrom
thesettingsscreen,the
following message is
displayed.
3.
Press Next to continue with
the zero calibration.
4.
Press Back to return to the
previousscreen.
7.
Press Next to return to the
main screen. The monitored
gasvalueswilltakeaminute
toreadthetruegasdelivery
values.