Status Outputs; Control Inputs; Cpu - Teledyne T101 Operation Manual

Troubleshooting & Service
3
4
5
6

9.5.9.3. Status Outputs

9.5.9.4. Control Inputs

9.5.10. CPU

230
40 40 mV
60 60 mV
80 80 mV
100 100 mV
The procedure below can be used to test the Status outputs.
1. Connect a cable jumper between the "-" pin and the "" pin on the status
output connector.
21. Connect a 1000 Ω resistor between the +5 V and the pin for the status
output that is being tested.
Table 9-8. Status Outputs Check Pin Out
PIN
(left to right)
1
2
3
4
5
6
7
8
22. Connect a voltmeter between the "-" pin and the pin of the output being
tested (Table 11-8).
23. Under the DIAG > SIGNAL I/O menu (Section 4.6.1), scroll through
the inputs and outputs until you get to the output in question. Alternately
turn on and off the output noting the voltage on the voltmeter, it should
vary between 0 volts for ON and 5 volts for OFF.
The control input bits can be tested by the following procedure:
1. Connect a jumper from the +5 V pin on the STATUS connector to the +5 V
on the CONTROL IN connector.
24. Connect a second jumper from the '-' pin on the STATUS connector to
the A pin on the CONTROL IN connector. The instrument should switch
from SAMPLE mode to ZERO CAL R mode.
25. Connect a second jumper from the '-' pin on the STATUS connector to
the B pin on the CONTROL IN connector. The instrument should switch
from SAMPLE mode to SPAN CAL R mode.
In each case, the T101 should return to SAMPLE mode when the jumper is removed.
There are two major types of CPU board failures, a complete failure and a failure
associated with the Disk-On-Module (DOM). If either of these failures occur, contact
the factory.
Teledyne ML - T101 Operation Manual
0.4 2
0.6 3
0.8 4
1.0 5
STATUS
System Ok
Conc Valid
High Range
Zero Cal
Span Cal
Diag Mode
Spare
Spare
4
6
8
10