Omega DPF500 Series manual Error Messages / Analog Output Calibration

Chapter 6 Error Messages / Analog Output Calibration

6.1 Error Messages

The DPF500 is provided with extensive self checking which assists the user in the location of setup entry errors and in reporting malfunctions or unusual operating conditions. When an error occurs, the display will flash. Press any key to see the error message corresponding to the error that has occurred. Press any key again to acknowl- edge the error. (If the error can be eliminated by a change of setup values, the unit will automatically advance to the MENU so that the appropriate setup changes can be made).

Table - 1 illustrates the warning message, problem, and recommended corrective actions.

Diagnostic Error Messages Table-1
WARNING MESSAGE	CAUSE	CORRECTIVE ACTION
RATE ER	Rate Low set	Set Rate Hi greater
	higher than Rate Hi	than Rate Lo
FAC ERR	Factor = 0	Set in correct Factor
“BAT” Descriptor	Low Battery	Replace battery(ies)
E total	Total rollover	None required
E RATE	Rate exceeds 99999	Use lower rate dec point
E pulse	Pulse out Overfl ow	Use different pulse scaler or
		totalizer decimal point
E FLASH	Save to fl ash	Write down displayed total and
	memory failed	setup values if you are changing
		the battery. If total wasn't saved,
		it will display an arbitrary total
		when new battery is installed. In
		this case, reset the total to 0 and
		check the setup information.

6.2 Analog Output Calibration

CAUTION: Performing the analog output calibration will erase all programming values. Please record all programmed values before beginning the analog output calibration

If the unit is equipped with the analog output option, the 4-20 mA has been accurately set to 4.000 and 20.000 mA by the factory. No calibrationshould be required.

The 4-20 mA output may be verifi ed periodically by installing a digital milliamp meter(DMM) in series with the analog output and simulating a full scale or over range fl ow rate.

If the output is out of calibration, perform the following:

Remove power and/or disconnect battery(ies). Hold down the scroll ( ↑ ) key and replace the battery. This will initiallize the unit and advance to the analog output calibration mode. Connect a DMM set to read current in series with a power supply (8.5 to 30 volts DC) to TB12 (+) and TB11 (–). The output should read 4.000 ma (± 0.005).

If it does not, Adjust the numbers on the display up or down until the output reads 4.000 ma (± 0.005). Press the "E" key. The DMM should now read 20.000 ma (± 0.005). If it does not, Adjust the numbers on the display up or down until the output reads 20.000 ma (± 0.005). Press "E" and the unit will return to the "RUN" mode.

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