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2. Enter the Main Menu as described above in section 3.1.
MAIN MENU
SCREEN
CALIBRATION
VIEW ALARMS
DATALOGGER OPTIONS
ID INFO
EXIT
3. Use the navigation arrows to highlight CALIBRATION and
press the MODE button.
CALIBRATION MENU
GAS VALUES
SPAN CAL
HISTORY O
2
ZERO CAL
FRESH
AIR
REMINDER
EXIT
4. Use the navigation arrows to highlight SPAN CAL and
press the MODE button.
SPAN CALIBRATION
LEL
0
CO
0
H
2
S 0
SO
2
0.0
EXIT
5. Use the up and down navigation arrows to highlight the
sensor that requires calibration. Confirm the sensor
selection by pressing the MODE button.
SPAN CALIBRATION
LEL
0
CO
0
H
2
S 0
SO
2
0.0
EXIT
As discussed above, the Cannonball3 includes a built-in
continuous sample draw pump that draws the gas sample into
the sensor compartment. As such, there are two viable
methods for delivering the gas to the sensor chamber for span
calibration: a standard 1 liter/minute regulator with the
calibration balloon that is included with every Cannonball3, or
with a demand flow regulator and a small piece of tubing.
6.a If using a calibration balloon, fill the empty balloon with
calibration gas until it is full. Connect the calibration
balloon assembly to the inlet coupling on the Cannonball3.
Continue to flow gas to the balloon throughout the span
calibration procedure.
6.b. If using a demand flow regulator, attach the regulator to
the gas cylinder and then connect it to end of the sample
probe assembly with a short piece of tubing. The
Cannonball3’s continuous sample pump will draw the
appropriate amount of calibration gas throughout the span
calibration procedure.
Make sure the regulator, cylinder
seating surfaces and threads are clean and dry before
attaching the regulator to the cylinder of gas. Introduction
of contaminants through the regulator fittings may alter or
degrade the concentration of the gas contained in the
cylinder and may lead to inaccurate and potentially
dangerous gas readings.
Make sure the calibration balloon is
filled with the appropriate calibration gas before
attempting to calibrate the Cannonball3. Use of improper
calibration gas or failure to fill the calibration balloon
before calibration may lead to inaccurate and potentially
dangerous gas readings.
7. When the readings stabilize, use the up and down
navigation arrows to raise or lower the readings to match
the level of the gas concentration printed on the calibration
cylinder label.
SPAN CALIBRATION
LEL
0
CO
0.0
H
2
S 0.0
SO
2
10.0
EXIT
8. When the span calibration for a particular sensor is
completed, press the MODE button to confirm the
calibration and then use the navigation arrows to advance
to the next sensor channel to be span adjusted. The
sensor that was just span calibrated will then be marked
with an arrow as shown below.
SPAN CALIBRATION
LEL
0
CO
0.0
H
2
S
0.0
→
SO
2
10.0
EXIT
If using the calibration balloon and the
calibration of more than one sensor is required, deflate the
calibration balloon fully before filling it with new gas for
subsequent calibrations. Failure to fully deflate the
calibration balloon between calibrations may lead to
inaccurate and potentially dangerous readings.
Содержание Cannonball3
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