Precision Digital Corporation PD663, Instruction Manual

Page: 9 / 16

PD663 Explosion-Proof Loop-Powered Meter Instruction Manual
9
Main Menu Display Functions &
Messages
The meter displays various functions and messages
during setup, programming, and operation. The
following table shows the main menu functions and
messages in the order they appear in the menu.
Display Parameter Action/Setting
dp
Decimal point
Set decimal point
SCL Scale
Enter the
Scale
menu
Npt
Number of Points
Set number of linearization
points
in1 Scale Input 1
Input signal 1 value (mA)
D1 Scale Display 1
Scaled value for input 1
in2
Scale Input 2
Input signal 2 value (mA)
D2
Scale Display 2
Scaled value for input 2
CAL
Calibrate
Enter the
Calibrate
menu
Npt
Number of Points
Set number of linearization
points
in1
Calibrate Input 1
Read input signal 1
D1
Calibrate
Display 1
Enter value for input 1
in2 Calibrate Input 2
Read input signal 2
D2
Calibrate
Display 2
Enter value for input 2
Setting the Decimal Point (
dP
)
Decimal point may be set with up to three decimal
places or with no decimal point at all.
Pressing the
Right or Up arrow moves the decimal
point one place to the right until no decimal point is
displayed, then it moves to the left most position.
Scaling the Meter (
SCL
)
The 4-20 mA input can be scaled to display the
process in engineering units.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
If using linear signal input conditioning, enter the
number of scale points (2-32), followed by the input
values and display values. If using square root signal
input conditioning, the number of points input menu
will not be present.
Number of Points (
npt
)
Set the number of linearization points used in the
Scale
menu. 2 to 32 points may be used. The
Scale
menu is entered after entering the number of points.
For instructions on how to program numeric values
see
Setting Numeric Values
, page
8
.
Minimum Input Span
The minimum input span is the minimum difference
between input 1 and input 2 signals required to
complete the calibration or scaling of the meter. The
minimum span is 0.40 mA.
If the minimum span is not maintained, the meter
reverts to input 2, allowing the appropriate input
signals to be applied.