56
CALIBRATION VALUE
CH
4
2.50
%/Vol
CALIBRATION VALUE
LEL
50.0
%
6. To change the concentration of LEL or CH
4
used in
calibration, use the right navigation arrow to highlight the
calibration gas concentration. With the concentration
value highlighted, adjustments to the gas concentration
may then be made using the up and down navigation
arrows.
CALIBRATION VALUE
CH
4
1.62
%/Vol
7. Once the appropriate calibration gas concentration is
reached, press the MODE button to confirm the setting.
CALIBRATION VALUE
CH
4
1.62
%/Vol
Save Changes?
YES
NO CANCEL
8. Press the MODE button with YES highlighted to save the
new settings.
CALIBRATION VALUE
Saved
4.7.2.2 Changing the direct reading setting of the CO
Plus sensor from CO to H
2
S
Sperian Instrumentation’s CO Plus sensor is designed for the
simultaneous detection of both carbon monoxide and hydrogen
sulfide, but it can only be calibrated for the direct detection of
one of these hazards.
Calibration gas settings determine whether the Cannonball3 is
configured for the direct detection of CO or H
2
S. When the
calibration gas selected is CO, the Cannonball3 will show CO+
on the current gas readings screen. Alternately, when the
calibration gas selected is H
2
S, the Cannonball3 will show
H
2
S+ on the current gas readings screen.
O
2
LEL
20.9
0
CO+
SO
2
0
0.0
Time 8:30 RT 1:15
Current gas readings screens with CO Plus sensor; calibration
gas setting set to CO.
O
2
LEL
20.9
0
H
2
S+
SO
2
0
0.0
Time 8:30 RT 1:15
Current gas readings screens with CO Plus sensor; calibration
gas setting set to H
2
S.
To change the direct reading selection of the CO Plus sensor
through the calibration gas value settings:
1. Enter the Calibration Menu as detailed above in section
4.7.1.
Summary of Contents for Cannonball3
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