Precision-digital PD663 User Manual download pdf (Page 26)

PD663 Loop-Powered Meter Instruction Manual

Internal Calibration (ICal)

There is no need to recalibrate the meter for milliamps when first received

from the factory.

The meter is factory calibrated for milliamps prior to shipment. The

calibration equipment is certified to NIST standards.

The internal calibration allows the user to scale the meter without applying a

signal. The use of a calibrated signal source is necessary to perform the internal

calibration of the meter. Check calibration of the meter at least every 12 months.

Notes:

The signal source must have a full-scale accuracy of 0.01% or better between

4 and 20 mA in order to maintain the specified accuracy of the meter.

Allow the meter to warm up for at least 15 minutes before performing the

internal calibration procedure.

The Internal calibration menu is part of the Advanced features menu.

Press and hold the Menu button for 5 seconds to enter the Advanced features

menu. Press the Up arrow button to scroll to the Internal Calibration menu (ICAL)

and press Enter.

The meter displays 4.00 mA. Apply a 4.00 mA signal and press Enter. The

display flashes for a moment while the meter is accepting the signal.

After the signal is accepted, the meter displays 20.00 mA. Apply a 20.00 mA

signal and press Enter. The display flashes for a moment while the meter is

accepting the signal.

Error Message (Err)

An error message indicates that the calibration process was not successful. After

the error message is displayed, the meter will revert to input 2 calibration

settings. The error message might be caused by inadvertently leaving the signal

at the previous level or not maintaining a 0.40 mA minimum span. Press the

Menu button to cancel the current calibration process if necessary.

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Precision-digital PD663 User Manual Page 26