GasTech Cannonball3, Reference Manual

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12. Recalibrate the Cannonball3 with calibration gas
appropriate for the new sensor before the instrument is put
back into service.
Figure 2.6.3 Internal assembly diagram
Cannonball3 programming includes safeguards to recognize
maladjusted sensors. If the settings on the new sensor are
significantly different from those of the old sensor it will trigger
a message that the sensor is reading “Too Low” or “Too High”
for One-Button Auto-Calibration fresh air adjustment.
Once the new sensor has been fresh air calibrated using the
“manual” calibration procedures, it will then be possible to do
subsequent fresh air and span calibrations by using the mode
button and One-Button Auto-Calibration procedures.
Note: The first fresh air calibration adjustment after
installation of a new sensor should be done using the
“manual” calibration procedure as discussed in section
4.6 of this manual.
2.6.4 Missing sensor
The Cannonball3 is able to recognize when a sensor is
removed or becomes disconnected while the instrument is in
normal operation. Disconnection of a sensor while the
instrument is turned on will trigger a missing sensor alarm, the
corresponding channel of the display will show an “X” in place
of the normal sensor readings and the audible and visible
alarms will be activated.
2.6.5 “Sensor not found”
If the Cannonball3 is suddenly unable to read the EEPROM of
a smart sensor currently installed the channel will “X” out and
the audible and visual alarms for the affected sensor channel
will be activated.
If a smart sensor is removed while the instrument is turned off
without being replaced with another sensor, a message will be
displayed during the start-up sequence indicating that the
sensor is missing. Pressing the MODE button acknowledges
the condition, and allows the use of the instrument for those
sensors that have been successfully detected.
Chapter 3. Advanced Functions
The microprocessor circuitry in the Cannonball3 makes
modifications to the operational set-up parameters easy. By
using the MODE button and four navigation arrows located on
the instrument keypad, the user can reach the Main Menu,
which provides access to the operational set-up choices for the
instrument.
Note: This chapter covers advanced functions in units
without the datalogger upgrade. Some menu items may
be slightly different for instruments with the datalogger
upgrade. Chapter 5 covers datalogging options in detail.
Caution: Reprogramming the Cannonball3 is reserved for
authorized personnel.
3.1 The Main Menu
The Main Menu provides access to all user-configurable
functions of the Cannonball3.
3.1.1 Entering the Main Menu
1. Turn the instrument on and wait until the gas readings
screen appears.
2. Press the MODE button until the information screen is
displayed.
INFORMATION
Date 31 JUL 04
Time of day 14:51
Runtime 0:00
Points logged
0
Temperature 77F 25C
Battery
6.6V
EXIT
MENU
3. Hold down the left navigation arrow for 3 seconds or until
EXIT appears and is highlighted.
INFORMATION
Date 31 JUL 04
Time of day 14:51
Runtime 10:07
Points logged
100
Temperature 77F 25C
Battery 6.6V
E
E
X
X
I
I
T
T
MENU
4. Press the down navigation arrow once to highlight MENU
and press the MODE button.
MAIN MENU
SCREEN CALIBRATION
VIEW ALARMS
TIME OPTIONS
ID INFO
EXIT
3.2 The Screen Menu