BT CGA-411 Operation Manual page 29

To Change Alarm Levels. If an alarm level is to be changed, rather than turned OFF,
select the relevant display by pressing switch #2 an appropriate number of times, then press
switch #1 until ON appears, then press switch #2. The display will show a number (the previous
alarm level) with a flashing first digit. If this digit does not need to be changed, press switch #2
again. The next digit will now be flashing. To change the digit, press switch #1 to advance
sequentially through 1,2,3,...0. Once the proper digit is reached, press switch #2 to advance the
flashing digit to the next position. Repeat until all digits are adjusted. At the end, the display
will show the relevant symbol followed by the new alarm level.
Examples of Selection or Adjustments
To Disable the Beeper on the TRACK GAS Scale. Set selector switch to AUTO
ZERO and press switch #2.
Switch #1
Switch #2
Exit by placing the front panel switch to a position other than AUTO ZERO. The
beeper on the TRACK GAS scale can be activated again by repeating the above procedure.
To Change the Alarm Level for the % GAS Display to 0.5% Gas. Set the front panel
selector switch to AUTO ZERO and press switch #2 three times. The display will advance to
GAS followed by a number (the current alarm limit). Continue by
Press
Switch #1
Switch #2
Switch #2
Switch #1
Switch #2
Switch #1
Switch #2
Switch #2
Exit by placing the front panel switch to a position other than AUTO ZERO.
Press
Display
ON
01.00
01.00
00.00
00.00
00.50
00.50
GAS followed by 0.50
Display Followed By
BEEP
OFF
BEEP
Underlined digit is flashing
Underlined digit is flashing
Continue pressing switch #1 until
0 appears as the second digit
Continue pressing switch #1 until
5 appears as the third digit
26
ON
OFF
Comment