RKI Instruments Gas Tracer - Manual (Page 118)

110 • Leak Testing Gas Tracer Operator’s Manual
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.
5000
%LEL
ppm
LEAK CK MODE
CH
4
OVER