Fluke 6135A/PMU, Руководство оператора

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Troubleshooting, Maintenance, and Care
Troubleshooting
8
8-5
6135A/PMU System Timing Unit (cont.)
Problem Probable Cause Action
Host Activity LED is flashing
steadily and “No PMU-Cal
Device” error message appears
during a test.
USB Connection between the
Server PC and the 6135A/PMU
System Timing Unit has a
problem.
Complete these steps in order:
1. Check the USB connection
between the Server PC and
the 6135A/PMU System
Timing Unit. See Figure 8-1.
2. Reset power to the
6135A/PMU System Timing
Unit.
3. Restart the Server PC.
One PPS LED is not flashing one
time per second when connected
to GPS receiver.
When the LED is off, the system
is not reading the UTC time from
the GPS Receiver.
Complete these steps in order:
1. Make sure the GPS receiver
is locked onto a satellite. See
“GPS Receiver in Chapter 3.
2. Check the IRIG connection.
See Figure 8-1.
Status LED does not flash when
the power is on (on or off all the
time when power is on).
If the Timing Unit is functional, the
light will flash in a simulated
“heartbeat” pattern. If the light is
continually on or off, this could be
an indication that the system has
malfunctioned.
Reset power to the 6135A/PMU
System Timing Unit. If this does
not fix the issue, contact Fluke
Calibration.
AUX Indicator LED flashes. Lost connection to Server PC. Restart the Server PC.
Server PC
For information on the LEDs on the front panel, see “6135A/PMU System Timing Unit”
in Chapter 1.
Problem Probable Cause Action
POWER LED is off when power is
on.
When the LED is off, the PC is not
on indicating that there is an
internal problem.
See the Server PC Users Manual.
Contact Fluke Calibration if the
problem cannot be determined
(see Contact Fluke Calibration in
Chapter 1).
HDD LED is not flashing when
power is on.
When the LED is not flashing,
data is not being transferred.
6135A Three Phase Power Standard
For troubleshooting information on the 6135A, see “
6100B/6105A Three Phase Power
Standard Operators Manual
”.