Precision Digital Corporation Loop Leader+ PD4-6624, Инструкция по эксплуатации

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PD4-6624 & PD4-6628 Loop-Powered Flow Rate/Totalizers Instruction Manual
65
Enabling the Function Key Hint
Feature (
HINT
)
Enabling the function key hint feature will cause a hint
message to be displayed when pressing the F1, F2,
or F3 function keys. This text gives a brief description
of what the button is programmed to do. Pressing that
function key a second time will execute that action.
The hint feature does not affect the digital input (DI)
which is intended for immediate execution.
Changing System Settings (
SYSTEM
)
The System menu contains the following menus:
Analog Output Calibration, Restore Factory Defaults,
Totalizer, Backlight, Information, and Internal
Calibration.
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 Loop
mA output should now be close to 4 mA. Enter
the actual value read by the digital mA meter
on the second line of the display and press
Enter.
3. The display will show 20 mA. The Loop
mA output should now be close to 20
mA. Enter the actual value read by the digital
mA meter on the second line of the display
and press Enter.
4. The Loop 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 PD4-6604 process meter. Refer to
the PD4-6604 instruction manual for instructions
about programming a PD4-6604 process meter.
Enabling or Disabling the
Backlight (
BACKLITE
)
The backlight may be enabled or disabled using the
Backlight menu. The backlight is enabled by default,
but the input must be wired appropriately for the back-
light to function. The backlight must be powered by an
external power source. See
Wiring Diagrams on page
25 . The voltage drop is the same if the backlight is not
wired or if it is disabled in the System menu.
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.
SYSTEM
SYSTM
AOUTCAL
SYSTM
DEFAULT
SYSTM
TOTAL
SYSTM
BACKLITE
SYSTM
INFO
SYSTM
ICAL
ENTER
F3
MENU
F2 F1 F2 F1 F2 F1
F2 F1 F2 F1