AMC AMC-1BXX, Руководство пользователя, Страница: 41 / 57

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5.3.3 PRE BUMP TEST
Before calibration, a
n “As Found” bump test) is usually performed to ensure each sensor is in
working order and returning reasonable responses. The bump test involves applying a test gas to
the sensor. However, sensors such as CO have a recovery time measured in multiple hours. As
a result, the calibration routine would find a zero at a concentration that is not the true background
concentration, should the sensor not have sufficient recovery time.
The “As ound” menu item allo s the user to enter the measured ac ground concentration
before performing a bump test. This value is persisted in memory for 24 hours. If a calibration is
performed during this 24h period, the persisted background concentration will be used to negate
the effect of the bump test and sensor recovery time on the calibration process.
efore performing a ump test, navigate to the “As ound” menu and enter the current
background reading. The user should then navigate to the main screen so that the gas
concentration may be monitored during the bump test. The user may then apply a target gas and
monitor the response.
onte t sensitive help for the currentl highlighted menu item
A A Ti al
indo
re ump Tes t
As ound
ac ground
.
Enter To Adv ursor
ac ground serves as a la el onl .
onte t sensitive help
Edit the current ac ground one digit at a time using the uttons.
ress E TER to advance the cursor to the ne t digit.
ress E TER hen the last digit is highlighted to save the value.