Precision Digital Corporation ProVu PD6210, Instruction Manual

Page: 50 / 56

P
RO
V
U
™ PD6210 Analog Input Batch Controller
Instruction Manual
50
Internal Source Calibration (
ICAL
)
The controller is factory calibrated prior to
shipment for milliamps and volts with calibration
equipment that is certified to NIST standards.
The use of a calibrated signal source is necessary to
calibrate the internal source of the controller. The
controller
’s internal source is what allows the user to
scale the controller without applying a signal.
Check calibration of the controller at least every
12 months. Each input type must be recalibrated
separately.
Notes:
1. If controller 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 controller 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
controller.
2. Press the Up arrow button to scroll to the Internal
calibration menu (
ICAL
) and press Enter.
3. The controller 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 controller displays low input current message
(
C lo
). Apply the low input signal and press
Enter. The display flashes for a moment while the
controller 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 above 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 value
within the range of the controller.
•
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.
After the error message is displayed, the controller
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.
The error message might be caused by any of the
following conditions:
5. Input signal is not connected to the proper
terminals or it is connected backwards.
6. Wrong signal selection in Setup menu.
7. Minimum input span requirements not
maintained.
8. Input 1 signal inadvertently applied to calibrate
input 2.
Minimum Input Span
The minimum input span is the minimum difference
between input 1 and 2 signals required to complete
the calibration or scaling of the controller.
Input range Input 1 & input 2 span
4-20 mA 0.15 mA

10 VDC
0.10 VDC