PD662 Loop-Powered Meter
Instruction Manual
23
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.
1. Press and hold the
MENU
button for 5 seconds to enter the
Advanced
Features
menu.
2. Press the
Up
arrow button to scroll to the
Internal Calibration
menu
(
ICAL
) and press
Enter
.
3. 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.
4. 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.
