Precision Digital Corporation PD6928, Инструкция по эксплуатации

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PD6928 Loop-Powered Flow Rate/Totalizer Instruction Manual
66
Changing System Settings (
SYSTEM
)
The System menu contains the following menus:
Analog Output Calibration, Restore Factory Defaults,
Totalizer, Backlight, CapTouch Buttons Operation
Mode, Information, and Internal Calibration
.
Note: The Analog Output Calibration menu is
available only if the option is installed.
Analog Output Calibration
(
AOUTCAL
)
To perform the analog output calibration, it is
recommended to use a milliamp meter with a
resolution of at least 0.1 µA to measure the output
current. The values saved internally during this
procedure are used for scaling the 4-20 mA output in
the
Setup menu.
4-20 mA Output Calibration Procedure
1. Go to the Advanced Features menu and
navigate to the
SYSTEM
menu and press
Enter. Navigate to
AOUTCAL
and press Enter.
2. The display will show 4 mA. The
Vant mA output should now be close
to 4 mA. Enter the actual value read by the
digital mA meter on the bottom display and
press Enter.
3. The display will show 20 mA. The
Vant mA output should now be close
to 20 mA. Enter the actual value read by the
digital mA meter on the bottom display and
press Enter.
4. The Vant will now calculate the
calibration factors and store them.
5. Press Menu to exit.
Disabling the Totalizer (
TOTAL
)
The totalizer can be disabled using the
SYSTEM
-
TOTAL
menu. With the totalizer disabled, the meter
will behave as a PD6908 process meter. Refer to the
LIM6908 instruction manual for instructions about
programming the process meter.