58
CALIBRATION VALUE
H
2
S
20.0
PPM
Save Changes?
YES
NO CANCEL
9. Press the MODE button with YES highlighted to save the
new settings.
CALIBRATION VALUE
Saved
Do not use multi-component
calibration gas mixtures containing both carbon monoxide
and hydrogen sulfide when calibrating the CO Plus sensor
In the Cannonball3. Calibration of the CO Plus sensor
with multi-component calibration gas mixtures containing
both CO and H
2
S may lead to dangerously inaccurate
readings.
Sperian Instrumentation’s multi-component calibration
gas mixtures containing both carbon monoxide and
hydrogen sulfide are labeled as “Not for use with CO Plus
sensors”.
Caution:
With the CO Plus sensor, the calibration gas
setting determines whether the instrument is configured
for the direct reading of CO, or for the direct reading of
H
2
S. Calibration gas corresponding to the calibration gas
setting must be used in the calibration of the instrument.
If carbon monoxide is chosen in the calibration gas
setting, the display will show CO+ and carbon monoxide
must be used to verify accuracy. Similarly, if hydrogen
sulfide is chosen in the calibration gas setting, the
instrument will display H
2
S+ and hydrogen sulfide must be
used to verify accuracy. Use of the incorrect calibration
gas may lead to inaccurate readings and potentially
dangerous readings.
4.7.3 Calibration
history
The Cannonball3 automatically remembers the latest
successful calibration dates for all sensors currently
recognized in the unit. To view the calibration history, do the
following:
1. Enter the Calibration Menu as described in above in
section 4.7.1.
CALIBRATION MENU
GAS VALUES
SPAN CAL
HISTORY
O
2
ZERO CAL
FRESH
AIR
REMINDER
EXIT
2. Use the navigation arrows to highlight HISTORY and
press the MODE button.
Last Calibration Dates
O
2
ZERO
13 OCT 2001
EXIT
3. Use the right and left navigation arrows to scroll through
the information for the individual sensors.
Last Calibration Dates
LEL
ZERO
13 OCT 2001
SPAN
13 OCT 2001
Calibrated to
25
Max possible 227
EXIT
↓
Last Calibration Dates
CO
ZERO
13 OCT 2001
SPAN
13 OCT 2001
Calibrated to
50
Max possible 145
EXIT
↓
Last Calibration Dates
H
2
S
ZERO
13 OCT 2001
SPAN
13 OCT 2001
Calibrated to
25
Max possible
70
EXIT
Summary of Contents for Cannonball3
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