Switch Test (Test 1)
D. Self Test
CAUTION
:
Avoid detector damage by removing it from the
chamber before executing any of the high voltage
tests.
The 7401 will execute several internal tests when in the test mode, which is enabled
by resetting the module. This is done by cycling power or using the front panel reset
switches (
Initializing the Display
on page 9). Immediately after the reset, press the
RESET and DIGIT SELECT buttons simultaneously and hold the switches until the
software revision level is displayed. Then the numeral “1” will be displayed
signifying that the unit is ready to perform test number one. Use the INC/DEC switch
to choose a test.
Press the START switch to start the test. The letter “P” will be displayed if the test
was passed. The letter “E” indicates an error. After each test is finished, the program
returns to the select mode.
NOTE: When the self-tests are executed, the digital pot settings for Bias,
Calibration pulse level, and Discriminator level will be altered.
After completing the self-tests, resume normal operation by cycling power or using
the front panel switches to reset the unit (see
Initializing the Display
on page 9).
Switch Test (Test 1)
This tests all front panel switches. After the START switch is pressed, the number
1.0 will be displayed, meaning press the START switch (again). If the test is passed,
the number will increment and the test will wait for the next switch to be pressed.
1.0 – Press the START switch (again).
1.1 – Press the STOP switch.
1.2 – Press the RESET switch.
1.3 – Press the INCREMENT switch.
1.4 – Press the DECREMENT switch.
1.5 – Press the DIGIT SELECT switch.
After the DIGIT SELECT test passes, the program returns to the select mode.
7401/7401VR Alpha Spectrometer User’s Manual - 9231603C
27
