ATI Technologies SmartTachSmartTach, User Manual

Page: 90 / 110

TROUBLESHOOTING
Page 6-4 SmartTach Operating Manual
Display is Always 0 or Erratic
This indicates that the input signal may be bad or the SmartTach is
improperly configured. The front panel Pulse LED can be used to monitor
the activity of this input. Possible faults include:
No signal from sensor (bad sensor or connection)
Solution: Check sensor output and wiring
Inductive Pick-up or other source connected to Pulse Input while using
TachSensor
Solution: Disconnect input not being used
Improper Signal Conditioning Input Setting (06)
Solution: Verify Spark or Trigger input
Signal Conditioning Input set to SPK when using TachSensor
Solution: Set Parameter 6 to TRG
Improper Spark Input Threshold Setting (10)
Solution: Insure proper method selected for application, see Common Faults
and Configuration Errors section for details.
Incorrect Value Displayed
This indicates an improper configuration. If the error is consistent in
magnitude, the source of the fault is most likely configuration or system
setup related. This can be as simple as an incorrectly set Pulses/Patterns
Per Cam Rev (parameter 02).
Incorrect Analog Output Voltage
This indicates that the Analog Output related configuration parameters
are incorrectly set, or the output is heavily loaded. First, verify that the
parameters (30 - 36) are correctly set, parameter 30 set to “min” before
startup will cause output to stay at zero volts. Second, disconnect the
Analog output signal from the device to which it is connected and use a
high input impedance voltmeter to check the voltage output. Parameter
35 is convenient for testing the full range of the analog output. Please
refer to Chapter 2 for details on connecting the Analog output.