Maintenance, Service, & Calibration
EPM2000/EPM2000e Reference Guide
54
Thermopile output appears noisy once the curve levels off.
Either deactivate the display speedup or set it to selective mode.
While transmitting data via IEEE-488, the EPM2000 crashes, reporting "018F SF".
This is a firmware error that Molectron has repaired in subsequent firmware/hardware upgrades.
Please contact a Molectron Applications Engineer to upgrade/calibrate your EPM2000 to the
latest revision.
The EPM2000 refuses to acknowledge commands sent via the IEEE-488 interface.
Verify the IEEE-488 port has been activated.
Verify the EPM2000 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.
The EPM2000 refuses to acknowledge commands sent via the RS-232 interface.
As above, verify the RS-232 option on the EPM2000 has been activated.
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.
Verify hardware handshaking is implemented.
The ch units ? command returns the text string, chan a: units ?
The EPM2000 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.
Some commands in a string of commands are not always implemented.
Be sure to allow sufficient time for the EPM2000 to complete a command before sending the
next one. 300 ms is ideal, although some commands will execute in less time.
The EPM2000 won't save anything in its output buffer or dump its output buffer.
If the EPM2000 is set for continuous output, the buffer will not contain data and the out dump
command will be ignored. Deactivate the continuous output with out cont off.
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