June 12, 2012
Page 14 out of 14
<12> ZERO CALIBRATION
In CAL [ZERO], when you touch ENT key, LCD shows “ZERO GAS <0.0 PPM>” with random
value. Then, please infuse clean air or 100% nitrogen gas into sensor cap. Then, after the
LCD value get stable, please touch ENT key. Then, LCD shows “ [OK]”.
However, if the calibration is not successful, LCD shows “[FAIL]” during 2 seconds.
<13> SPAN CALIBRATION)
(ex) Target gas : H2S
Standard gas: H2S(25 PPM) + Air Balance
(1) In CAL [SPAN], please touch ENT key.
(2) Please input H2S standard gas density value using UP & DOWN key. And then,
please touch ENT key)
(3) Please infuse H2S standard gas and wait until LCD value gets stable. After the value
gets stable, please touch ENT key.
(4) When span calibration is successful, LCD shows:
(5) Please eliminate the span gas from gas inlet and wait the LCD value gets less than
10 PPM. When the LCD value goes less than 10 PPM, measuring mode starts
automatically.
SPAN ADJ
025 PPM
SPAN GAS
025 PPM
SPAN GAS
[OK]
Holding
009 PPM
