TSI Instruments PRESSURA 8630-PM, Operation And Service Manual

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Part Two
30
TEST - DIM
Press TEST key to verify Digital Interface Module (DIM) electronics are functioning
correctly. At the end of the self test, the display will show SELF TEST - PASSED if
all DIM electronics are good. If unit displays DATA ERROR at the end of the test,
the electronics may be corrupted. Check all software items to determine cause of
DATA ERROR.
If SELF TEST - PASSED is displayed proceed to test individual components. Enter
Diagnostics menu and check the following:
Sensor input
Sensor status
Analog output
Key input
These diagnostic menu items are explained in detail in the next section
(
Diagnostics Menu ) of the manual, so their function is not reviewed here. If the
PresSura system passes each of the tests, the mechanical piece parts are all
functioning correctly.
TEST - Sensor input
Enter SENSOR INPUT menu item in diagnostics menu. A voltage between 0 and
10 volts DC will be displayed. It is not important what the exact voltage is to pass
this test. Tape over the pressure sensor (slide pressure sensor door open) and
voltage should read approximately 5 volts (zero pressure). Remove tape and blow
on sensor. Displayed value should change. If voltage changes, the unit passes. If
voltage doesn’t change, proceed to Sensor status test.
TEST - Sensor status
Enter SENSOR STAT menu item in diagnostics menu. If NORMAL is displayed,
the unit passes test. If an error message is displayed, go to diagnostic menu
section of the manual, SENSOR STAT menu item for explanation of error
message.
TEST - Analog output
NOTE : This test is only performed if analog output feature is being used.
Enter ANALOG OUT menu item in diagnostics menu. A value between 0 and 255
will be displayed. Hook up a DC voltmeter to pins 9 and 10. Press the

/

keys to
change output from 0 to 255. Voltage should change from 10 volts to zero volts (20
mA to 0 mA if current output).
TEST - Key input
NOTE : This test is only performed if system has a TSI key switch installed.
Enter ROOM MODE item in control menu. Verify KEY SWITCH option is selected.
Exit menu item and enter KEY INPUT item in diagnostics menu. Note the position
of the key switch. Verify that key switch position and key input match. Rotate key
switch to verify key input works for all positions.
If unit passed all tests, the mechanical components are physically working. If problems
still exist, go to troubleshooting chart for additional information on both hardware and
software symptoms.