Models 947, 948 and 960 Leak Detectors Operations and Service Manual
3-16
5. Press the
START
button.
❑
The VENT LED goes off.
❑
The START and TEST LEDs illuminate a second later.
❑
The START LED turns off and the LED Rate Range (exponent) displays at the
selected range.
6. Introduce helium to the item under test. The leak detector automatically traces the
helium signal within the selected range. If larger than the pre-set Reject value, the leak
rate signal reads the maximum level and the Reject LED illuminates.
7. Press and hold the
VENT
button for approximately 1 second until the unit switches to
the VENT mode.
❑
The TEST LED turns off.
❑
The VENT LED illuminates.
NOTE
If the VENT button is pressed for less than one second,
the leak detector moves to HOLD.
8. Remove the tested part from the test port.
The Leak test is now complete.
3.6 Standby
When continued use of 947/948/960 is not anticipated, STANDBY
mode, a partial
shutdown, can be used to save energy. To put the 947/948/960 into STANDBY
mode:
1. Press the
VENT
button and hold it until the Vent LED comes on.
2. Place the Rough pump power switch in the
OFF
position.
3. Turn the Rough pump switch breaker to the
ON
position to return the Leak Detector to
the READY FOR OPERATION mode.
NOTE
When the unit is returned to Ready for Operation from
Standby, the warmup periods do not apply.
