Javelin D
Ɣ
Model PD644 Voltmeter
Instruction Manual
44
Internal Calibration (
ICal
)
x
There is
no need to recalibrate
the meter
when first received from the factory.
x
The meter is
factory calibrated
prior to
shipment. The calibration equipment used
at the factory is certified to NIST stan-
dards.
x
Allow the meter to warm up for at least
15 minutes before performing the internal
calibration procedure.
The internal calibration allows the user to scale the meter without apply-
ing a signal.
The use of calibrated signal sources is necessary to perform the internal
calibration of the meter.
Check calibration of the meter at least every 12 months.
The
Internal
calibration
menu is part of the
Advanced
features menu.
1. Press and hold the
Right
arrow and the
Menu
buttons, for three
seconds, to access the Advanced features of the meter (Tip: press
and hold
Right
arrow first then press
Menu).
2. Press
the
Up
arrow button to scroll to the
Internal calibration
menu
and press
Enter/Ack
.
3. The meter displays voltage (
volt
). Press
Enter/Ack
to start the
calibration process.
4. The meter displays
VLow
(
u lo
) prompt. Apply the lower voltage
input signal and press
Enter/Ack
. The display flashes for a moment
while meter is sampling the input.
5. After the display stops flashing, a number is displayed with the
leftmost digit brighter than the rest. The bright digit is the active digit
that can be changed by pressing the
Up
arrow button. Press the
Right
arrow button to move to the next digit.
6. Set the display value to correspond to the input voltage being ap-
plied.
7. The display moves to the high input calibration (
u Hi
). Apply the
higher voltage input signal and press
Enter/Ack
.
8. Set the display for the high input calibration in the same way as it
was set for the low input calibration.
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