Maintenance, Service, & Calibration
EPM2000/EPM2000e Reference Guide
53
MAINTENANCE, SERVICE, & CALIBRATION
TROUBLESHOOTING
The EPM2000 Dual-Channel Joulemeter/Power Meter is designed to provide a lifetime of simple,
worry-free use. Most perceived problems are typically configuration errors. In addition to the
questions and answers below, check Molectron Detector’s website (http://www.molectron.com) for
the latest FAQ documents.
The EPM2000 does not respond to anything, the screen is dark.
Verify the power cord is plugged securely to the back of the EPM2000 and that the AC socket is
powered. Check the fuse and replace if necessary. (see Maintenance, Service, & Calibration
-- Fuse Replacement)
The EPM2000 is on, but no reading occurs at a laser pulse.
Properly align the probe in the beam. Verify the probe is connected to the Pulse In or Smart
Probe connector.
If the trigger source is external, be sure an actual trigger pulse is applied to the Trigger In
connector. If the EPM2000 is expected to extract a trigger from the incoming laser pulse, set the
trigger source for internal.
Lower the trigger level.
Lower the EPM2000's range.
The EPM2000 ignores an attached PowerMax or other thermopile probe.
Verify the probe is connected securely. Verify the PowerMax function is enabled by pressing
. When “ON” appears on the LCD, the PowerMax function is enabled.
The EPM2000 ignores an attached pyroelectric/silicon probe.
If the EPM2000 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.
The EPM2000 won't go into Ratio mode on either channel.
Verify that exactly one channel is slave-triggered.
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