MTI AccuMeasure 9000, Руководство пользователя

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PROBLEM CORRECTIVE ACTION REFERENCE
The rear panel
output voltage is
not +10.00 VDC at
the full-scale probe
gap or +1.00 VDC
at 10% of full-scale
probe gap.
1. Check the front panel offset switch
position. If the offset indicator is lighted,
press and release the offset switch to
remove the offset.
2. Check that the range of the probe under
test is correct.
3. Verify that the probe and target are
touching when the probe gap should be
zero.
4. Check the calibration of the front panel
GAIN adjustment.
5. Ensure that the ground return
connection from the target to the unit is
intact.
1. PROBE AMPLIFIER CALIBRATION
CHECK for gain adjustment.
2. PROBE MOUNTING manual section.
The rear-panel
output voltage is
higher than
+12 VDC at all
probe-to-target gap
settings and all the
bargraph elements
for the channel
being tested are
lighted.
1. Check the probe cable connection to
the front panel; ensure that the cable is
securely attached to the receptacle.
2. Check for an open circuit in the center
wire of the probe cable.
3. Check for open circuit in the probe
between the connector and the sensing
element on the probe face.
4. Ensure that the ground return
connection from the target to the unit is
intact.
1. TARGET GROUNDING manual section.
2. PROBE MOUNTING manual section.
The noise on the
rear-panel output
voltage is
abnormally high.
1. Check the probe and probe cable for
loose or high resistance connections.
2. Check along the length of the probe
cable for cuts or defects.
1. TARGET GROUNDING manual section.
2. PROBE MOUNTING manual section
Excessive 60-Hz
noise on the rear
panel output signal. 1. Check for a good AC power line ground
between the power source and the case
of the unit.
2. Ensure that there is a good low
resistance ground return connection
between the target and the unit.
1. TARGET GROUNDING manual section.
2. PROBE MOUNTING manual section