DataPro 500 Operator Guide
Troubleshooting
Troubleshooting
General
Problem
Possible cause(s)
Corrective Action
Display does not
turn on
No AC power
Sensor cable damaged
Check power switch
Unplug 25 pin sensor cable to remove
a possible short-circuit if the cable is
damaged
No laser output
from the gauge
Indicator is off and laser is off
No power to the indicator / fuse
blown
Cable not plugged in or damaged
Indicator is on but laser is off
Laser interlock is open
Indicator is on and laser light is on
Shutter signal is open
If unit was just turned on, and the
sensor is hot or cold, it can take a
few minutes for the sensor to bring
the laser to the proper temperature
LaserSpeed sensor temperature
specification exceeded
Check and replace fuses as required
Inspect cables for damage, verify
connections
Check laser interlock key switch and
make sure it is on
Check rear panel shutter interlock
connection
Wait a few minutes for the laser to turn
on
Cooling / heating may be required. Run
compressed air or 28-30 °C water
through sensor’s coolant ports. To
avoid condensation, the sensor
temperature should not be allowed to
go below dewpoint
Gauge is rebooting
/ laser on light on
sensor cycles on &
off / comm led on
sensor is
perpetually blinking
Not enough power to the gauge
Make sure a good quality sensor cable,
of the proper length, is being used.
Refer to the LaserSpeed handbook for
information on cables
Fuse blow
Fuse blown
Replace the fuse with 1.5A 250V Type
T or Slo fuses. The fuse holder can
hold two ¼”x 1” or two 5mm x 20mm
fuses.
Disconnect all cables before powering
the DataPro 500 back on. Reconnect
cables one at a time to determine the
source of the problem.
Display reads zero
Improper scale factor
No laser
Check indicator scale factor
Check interlocks and shutter
Improper count or
rate on the
indicator
Scale factors in sensor and
indicator do not match
Pulse frequency too high
Correct either indicator scale factor or
sensor scale factor to match
Lower the scale factor in the sensor
and indicator
Part No. MAN/EN5400-0001
Page 13 of 14
Revision B (Jun 2010)