Precision Digital Corporation PD6900 Series, Instruction Manual

Page: 68 / 82

PD6928 Ex-Proof & I.S. Loop-Powered Flow Rate/Totalizer Instruction Manual
68
Enabling or Disabling the
Backlight (
BACKLITE
)
The backlight may be enabled or disabled using the
System - Backlight menu. The backlight is enabled by
default, but the input must be wired appropriately for
the backlight to function. See
Wiring Diagrams on
page 24 .
CapTouch Buttons Operation
Mode (
CAPTOUCH
)
CapTouch buttons have two modes of operation:
Normal and Delayed. Delayed mode prevents
accidental trigger of the buttons. In the Delayed
mode, the buttons enter into a low sensitivity state
(sleep) and they ignore quick button presses after 20
seconds of inactivity. To wake up the buttons, press
and hold any button for more than 2 seconds, the
buttons respond normally.
Viewing System Information
(
INFO
)
System information, such as software (firmware)
number and version, model number, and system tag,
may be viewed in the
INFO
menu. Press the Right
Arrow button to cycle through all available meter
information. Press Menu to go back to the previous
menu.
Calibrating the Internal mA
Reference (
ICAL
)
The meter is factory calibrated prior to shipment to display
0.00 to 100.00, which corresponds to the 4-20 mA input.
The calibration equipment is traceable 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.
Note: 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
menu. Internal Calibration is performed as follows:
1. Press the Menu button to enter
Programming Mode .
2. Press the Up-Arrow button twice and press
Enter to access the Advanced menu.
3. Press the Up-Arrow button and press Enter
to access the System menu.
4. Press the Up-Arrow button and press Enter
to access the ICAL menu.
5. The meter displays low input current
message
(
4.000 mA
). Apply a 4 mA signal and press
Enter . The display flashes for a moment
while the meter is accepting the low input
signal.
6.
After the display stops flashing, the display
moves to the
high input calibration (
20.000
mA
). Apply the high input signal and press
Enter . The display will flash again while the
meter is accepting the high input signal.