- OMEGA Engineering, Inc. Power Supply Product Manual

11.. . APPENDIX J: TROUBLESHOOTING TIPS
USING THE OMP-MODL11-132
of the Relay switches in the TEST position while observing the voltage.
New batteries will read approximately 9 VDC and batteries below apx 7
volts are essentially dead.
OR... apply an external supply to the EXT power terminals on the MLCPU-1
module.
The OMP-MODL may have a corrupted Program Net:
Perform a system intialization with the following procedure:
A. Depress and hold the NEXT button down on the front panel.
B. Momentarily, depress the STOP and RESET buttons
simultaneously, then release them.
C. After a second or so, release the NEXT button.
NOTE: This 3 button reset will erase all internal data as well as the
currently loaded Program Net. Use with caution.
Power Failure / Batteries drain with External Power Source Connected:
The external power fuse may be blown. This would prevent the logger from
running from the external power source and it would continue running from
the batteries until they discharged. Refer to Appendix D for the location of
this fuse. The fuse can be checked with a continuity meter and should read
less than 1 ohm of resistance. If it is open, replace it with a 1.5A, Littelfuse
P/N: 273.015 available from Omega Engineering Incorporated or an
electronic components distributor.
SERIAL COMMUNICATION PROBLEMS:
Cannot establish an RS-232 link:
Insure that only Omega Engineering OMP-MODL adapters and cables
are used. Also, insure that no gender or pinout adapters (eg 9 pin to 25
pin) are used. Pinout is critical and must be correct for communication to
work. Pinout details are provided in Appendix I.
Check the Port number and that the port is actually working with another
serial package and device (eg a modem).
Refer to addtional considerations in the HyperComm Serial
Communications chapter.
Modem Communication Problems:
Refer to Appendix K for modem configuration details.
Refer to the HyperComm Serial Communications chapter.
HYPERPLOT :
No Data Displays upon loading of File:
Data may actually be loaded but compressed. Select the
Calculations\Zoom All menu choice to view.
ANALOG READINGS:
Incorrect readings on HLIM-1 Channels:
Ensure that the fuse for the particular channel is not blown.