P
RO
V
U
™ PD6001 Analog Input Feet & Inches Meter
Instruction Manual
44
Internal Source Calibration (
ICAL
)
The meter is
factory calibrated
prior to shipment
for milliamps and volts with calibration equipment
that is certified to NIST standards.
The use of calibrated signal sources is necessary to
calibrate the internal source of the meter. The meter’s
internal source is what allows the user to scale the
meter without applying a signal.
Check calibration of the meter at least every
12 months. Each input must be recalibrated
separately.
Notes:
1. If meter is in operation and it is intended to
accept only one input type (e.g. 4-20 mA),
recalibration of other input is not necessary.
2. Allow the meter to warm up for at least
15 minutes before performing the internal source
calibration procedure.
The
Internal
calibration
menu is part of the
Advanced
Features
menu.
1. Press and hold the Menu button for three
seconds to access the advanced features of the
meter.
2. Press the Up
arrow button to scroll to the
Internal
calibration
menu (
ICAL
) and press Enter.
3. The meter displays either current calibration
(
C CAL
) or voltage calibration (
V CAL
), according
to the input setup. Press Enter
to start the
calibration process.
Example of Internal Calibration for current
input:
4. The meter displays
low
input current message
(
C lo
). Apply the low input signal and press
Enter. The display flashes for a moment while the
meter is accepting the low input signal.
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
signal being calibrated, typically 4.000 mA.
7. The display moves to the
high
input calibration
(
C Hi
). Apply the high input signal and press
Enter.
8. Set the display for the high input calibration, in
the same way as it was set for the low input
calibration, typically 20.000 mA.
The graphic below shows the calibration of the current
input. The voltage input is calibrated in a similar way.
Tips:
•
Low and high input signals can be any valid
values within the range of the meter.
•
Observe minimum input span requirements
between input 1 and input 2.
•
Low input should be less than high input
signal.
Error Message (
Error
)
An error message indicates that the calibration or
scaling process was not successful.
The error message might be caused by any of the
following conditions:
1. Input signal is not connected to the proper
terminals, or it is connected backwards.
2. Wrong signal selection in
Setup
menu.
3. Minimum input span requirements not
maintained.
