Precision Digital Corporation PROVU PD6363, Instruction Manual

Page: 30 / 56

P
RO
V
U
™ PD6363 Dual Analog Input Rate/Totalizer
Instruction Manual
30
Programming the Rate/Totalizer
(
prog
)
The meter may either be scaled (
SCALE
) without
applying an input, calibrated (
Cal
) by applying an
input, or you may use the K-Factor menu to match the
rate/totalizer with a flowmeter’s k-factor (pulse/unit of
measure). The meter comes factory calibrated to
NIST standards, so for initial setup, it is
recommended to use the (
SCALE
) function.
The Program menu contains the following menus for
each channel A and B:
1. K-Factor calibration
2. Scale without a signal source
3. Calibrate with a calibrated signal source
4. Total time base & conversion factor
5. Grand total time base & conversion factor
6. Reset modes for total & grand total
The pulse inputs may be calibrated or scaled to any
display value within the range of the meter.
Additional parameters, not needed for most
applications, are found in the
Advanced Features
menu; see Advanced Features Menu , page 42.
Input Calibration Method (
InCAL
)
There are three methods of calibrating (or scaling) the
display for each input channel to show the correct
engineering units.
•
Use the Factor menu to enter the k-factor of a
flowmeter in units/pulse
•
Use the Scale menu to enter the scaling without a
signal source.
•
Use the Calibrate menu to apply a signal from a
signal source.
Note: The Scale, Calibrate, and K-Factor functions
are exclusive of each other. The meter uses the last
function programmed. Only one of these methods can
be employed at a time.
Multi-Point Calibration & Scaling
The Scale and Calibrate functions can use up to 32
points (default is 2). The number of points should be
set in the Advanced menu under the
Multi-Point
Linearization (
Linear
) menu selection prior to scaling
and calibration of the meter, see page 45 for details.
K-Factor Calibration (
Fact-A
,
Fact-
b
)
The meter may be calibrated using the K-Factor
function. Most flowmeter manufacturers provide this
information with the device. Enter the
K-Factor
(
Fact-A
,
Fact-b
) menu and select the decimal point
with highest resolution possible and program the k-
factor value (
i.e. pulses/gal). The meter will
automatically calculate the flow rate using the k-factor
and the time base selected.
Scaling the Meter without a Signal
Source (
SCAL-A
,
SCAL-B
)
The inputs can be scaled to display the process
variables in engineering units.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
From the
INCAL
menu, select channel A or B,
followed by
SCal-A
or
SCal-B
, and then set the input
signal value and display value for each of the scaling
points (default is two). Enter the input signal values in
pulses/second (Hz), and the corresponding display
values in appropriate engineering units.
Channel B is scaled similarly to Channel A, shown
below.