PD663 Loop-Powered Meter
Instruction Manual
26
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.
