Download MODEL 700E DYNAMIC DILUTION CALIBRATOR

TELEDYNE INSTRUMENTS
M700E Calibrator Operator’s Manual
General Troubleshooting & Repair of the M700E Calibrator
11.3.3. VALVE DRIVER PCA STATUS LEDS
The Signal I/O submenu also includes VARS that can be used to turn the various input gas valves on and off as
part of a diagnostic investigation.
WATCHDOG INDICATOR
CAL GAS
VALVE 1
PURGE
VALVE
CAL GAS
VALVE 2
DILUENT
VALVE
CAL GAS
VALVE 3
CAL GAS
VALVE 4
Figure 11-4: Valve Driver PCA Status LEDS Used for Troubleshooting
Table 11-6: Valve Driver Board Watchdog LED Failure Indications
LED
Function
Fault Status
Indicated Failure(s)
 Failed/Halted CPU
D1
(Red)
I2C bus Health
(Watchdog Circuit)
Continuously ON
or
Continuously OFF
 Faulty Mother Board, Keyboard or Relay PCA
 Faulty Connectors/Wiring between Mother Board,
Keyboard or Relay PCA
 Failed/Faulty +5 VDC Power Supply (PS1)
Table 11-7: Relay PCA Status LED Failure Indications
LED
FUNCTION
ACTIVATED BY SIGNAL
I/O PARAMETER
D3
Cal Gas CYL1
CYL_VALVE_1
D4
Cal Gas CYL2
CYL_VALVE_2
D5
Cal Gas CYL3
CYL_VALVE_3
 Failed Valve
D6
Cal Gas CYL4
CYL_VALVE_4
 Failed Valve Driver IC on Relay PCA
D9
Purge Valve
Status
PURGE_VALVE
 Failed Valve Driver Board
D10
Diluent Valve
Status
INPUT_VALVE
05622 REV B
DCN 5169
DIAGNOSTIC TECHNIQUE
Valve should audibly change states and
LED should glow.
If not:
 Faulty +12 VDC Supply (PS2)
 Faulty Connectors/Wiring
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