TIF ZX Heated Pentode Refrigerant Detector - Manual (Page 9)

7
automatic circuit/Reset feature
The unit features Automatic Circuit and Reset functions that set the unit to ignore
ambient concentrations of refrigerant .
automatic circuit - Upon initial power-on and completion of the warm-up, the unit
automatically sets itself to ignore the level of refrigerant present at the tip . Only a level,
or concentration, greater than this level will cause an alarm . Note: Since this feature
causes the unit to ignore any refrigerant present at the probe tip after warm-up is
completed, the unit should be powered on and allowed to warm up in fresh air.
Reset feature - Resetting the unit during operation performs a similar function; it
programs the circuit to ignore the level of refrigerant present at the tip . Each time the
Reset Key is pressed (and released), the unit sets its threshold for detection to a
level above the current concentration being detected . By moving closer to a large leak,
and pressing Reset each time a full detection is indicated, the user can pinpoint the
source of the leak (higher concentration) .
Similarly, the unit can be moved to fresh air and reset for maximum sensitivity .
Resetting the unit with no refrigerant present (fresh air) causes any level above zero to
be detected . The unit is set to its maximum sensitivity in the chosen sensitivity level .
To reset the unit, press the Reset Key . Each time the Reset Key is pressed, the LEDs
briefly show orange to provide a visual confirmation of the reset action .
sensitivity adjustment
The unit provides two levels of sensitivity . When the unit is switched on, it is set to the
high sensitivity position .
1 . To change the sensitivity of the unit, press the Sensitivity Key . When the key is
pressed, the LEDs light in orange from right to left, providing a visual confirmation
and indication that the unit is in LOW sensitivity mode .
2 . To switch back to high sensitivity again, press the Sensitivity Key . The LEDs light in
orange from left to right, providing a visual confirmation and indication that the unit
is in HIGH sensitivity mode .