Maintenance, Service, and Calibration
EPM1000 User’s Guide
43
Maintenance, Service, & Calibration
Troubleshooting
Verify the power cord is plugged securely to the back of the EPM1000
and that the AC socket is powered. Check the fuse and replace if
necessary (see Maintenance , Service, & Calibration -- Fuse
Replacement)
Properly align the probe in the beam. Verify the probe is connected to
the Pulse In or Smart Probe connector. If the trigger source (see
Operation -- Operations Settings -- Trigger Settings -- Trigger
Source) is external, be sure an actual trigger pulse is applied to the
Trigger In connector. If the EPM1000 is expected to extract a trigger
from the incoming laser pulse, set the trigger source for internal. Lower
the trigger level (see Operation -- Operations Settings -- Trigger
Settings -- Trigger Level). Lower the EPM1000's range.
Verify the probe is connected securely. Verify the PowerMax
®
function
is enabled by pressing . Likewise, disable the function by
pressing .
If the EPM1000 senses a PowerMax
®
thermopile probe upon startup, it
will ignore pyroelectric/silicon probe input. Either disconnect the
PowerMax
®
probe or deactivate it using the method described above.
Either deactivate the display speedup (see Operation -- Operation
Settings -- System Settings -- Display Speedup) or set it to selective
mode.
Verify the IEEE-488 port has been activated (see Operation --
Operation Settings -- Communications Settings -- IEEE-488 Enable/
Disable). Verify the EPM1000 IEEE-488 address matches the host
computer's address. Verify the cable is securely attached to both
devices. Verify that other IEEE-488 devices can be used on the same
bus.
As above, verify the RS-232 option on the EPM1000 has been activated
(see Operation -- Operation Settings -- Communications Settings --
RS-232 Enable/Disable) Verify the host computer has selected the
correct COM port address. Verify the cable is connected and in good
condition. If the cable has become disconnected, the COM port may
have to be reinitialized. Verify the COM port works with other devices.
Add a CR (Carriage Return, ASCII 13) to the end of a command string.
The EPM1000 may be in the middle of collecting the first of a series of
statistical batches. Until the first batch is completed, a units query returns
the above response. Either query units before entering statistics mode or
wait until the first batch has been taken.
.
.
The EPM1000 does not
respond to anything, the
screen is dark.
The EPM1000 is on, but no
reading occurs at a laser
pulse.
The EPM1000 ignores an
attached PowerMax
®
or other
thermopile probe.
The EPM1000 ignores an
attached pyroelectric/silicon
probe.
Thermopile output appears
noisy once the curve levels
off.
The EPM1000 refuses to
acknowledge commands sent
via the IEEE-488 interface.
The EPM1000 refuses to
acknowledge commands sent
via the RS-232 interface.
The
ch units ?
command
returns the string
CHAN A: UNITS ?
.
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