Precision Digital Corporation Loop Leader PD6600 Series, Instruction Manual

Page: 44 / 51

PD6600 Series Loop-Powered Process Meters Instruction Manual
44
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 ,
Dual-Scale (PV2) , Backlight , Information , and Internal
Calibration .
Analog Output Calibration
(
AOUTCAL
)
To perform the analog output calibration, it is recom-
mended to use a milliamp meter with a resolution of at
least 0.1 µA to measure the output current. The val-
ues 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 Leader
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 Leader
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 Leader will now calculate the
calibration factors and store them.
5. Press Menu to exit.
Enabling the Dual-Scale Feature
(
PV2
)
Dual-Scale Mode
Top Display:
Toggling Between Process Variable and Units
Bottom Display: Toggling Between Process Variable
(in different scale) and Different Units
For some level applications, such as displaying the
height and volume of a tank, a second PV can be en-
abled which can be scaled to display a different value
based on the same 4-20 mA input. This is accom-
plished by enabling the dual-scale feature (
PV2
).
When the dual-scale feature is enabled, additional
menus will be displayed to allow for the programming
of the second PV. The input menu will display PV1
and PV2 for scaling and the display menu will allow
both PVs to be displayed on either line, for example.
See
Display Functions & Messages on page 23 for
additional information on where additional dual-scale
specific menus will appear.
PV2 must be enabled to use the Round Horizontal
Tank feature. See
Round Horizontal Tank
Linearization (
RH TANK
) on page 40 .
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. See
Wiring Diagrams on page 20 .
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
PV2
SYSTM
BACKLITE
SYSTM
INFO
SYSTM
ICAL
SYSTM
PV2
PV2
DISABLE
PV2
ENABLE