104 • Leak Testing
Gas Tracer Operator’s Manual, CSA Version
5. Use the increasing and decreasing of the reading to locate the leak point.
6. To exit Leak Check Mode and return to the Leak Check Mode Select Screen at
any time, press and hold the (SHIFT)
▼
button for 5 seconds.
Overscale Conditions
There are two overscale conditions that the Gas Tracer may experience while
operating in Leak Check Mode.
• Exceeding display range
If you are using a display range of 500, 1000, or 2000 ppm and the gas level
goes above the display range, the full scale value of the display range will be
displayed but it will not be an overscale condition unless the gas level is above
5000 ppm. If the gas level exceeds 5000 ppm, the ppm sensor will be shut off
and the instrument will enter a 30 second warm up period.
• Exceeding 100% LEL
If the combustible gas level exceeds 100% LEL, the Gas Tracer will display an
overscale alarm and the ppm sensor will be shut off.
NOTE:
If a vol% sensor is installed, “OVER” will still appear at the bottom of the
screen but the instrument will display the gas reading in %volume.
The Gas Tracer will continue to be in overscale alarm until the gas reading
decreases. The instrument will then enter a 30 second warm up period while
the ppm sensor turns on again.
Turning the Alarm On and Off in Leak Check Mode
The alarm buzzer can be turned off and on when the Gas Tracer is in Leak Check
Mode. This setting only applies to Leak Check Mode and does not affect buzzer
operation in Normal or Bar Hole Mode. When the buzzer is set to Off, NO
ALARM appears in the upper left hand corner of the display. If the buzzer is
turned off, then it will remain off in Leak Check Mode even if you enter Normal
Mode or Bar Hole Mode and return to Leak Check Mode or turn the unit off and
on unless the buzzer is manually turned on.
To turn the buzzer off or on while in Leak Check Mode:
1. Press and hold the DISPLAY(ADJ) button for 5 seconds.
NOTE:
Pressing and holding the DISPLAY (ADJ) button will change the full
scale setting for Leak Check Mode. Once you have made your buzzer
selection, use the DISPLAY (ADJ) button to display the desired full
scale.
5000
%LEL
ppm
LEAK CK MODE
CH
4
OVER
