Precision Digital Corporation PD6100-6H0, Instruction Manual

Page: 25 / 47

P
RO
V
U
™ PD6100 Strain Gauge, Load Cell, and mV Meter
Instruction Manual
25
Calibrating the Meter with Strain
Gauge/Load Cell (
Cal
)
To scale the meter without a signal source, refer to
Scaling the Meter (
SCALE
) on page 25 .
The meter can be calibrated to display the process
variable in engineering units by applying the
appropriate input signal and following the calibration
procedure.
The use of a calibrated signal source is strongly
recommended to calibrate the meter.
Warm up the meter for at least 15 minutes before
performing calibration to ensure specified
accuracy.
Multi-Point Calibration & Scaling
The meter is set up at the factory for 2-point linear
calibration. The number of points for multi-point
calibration/scaling is set up in the
Advanced Features
menu. Up to 32 linearization points may be selected
for PV1 and up to 8 linearization points may be
selected for PV2. See
Multi-Point Linearization
(
Linear
) on page 38 for details.
Scaling the Meter (
SCALE
)
The strain gauge input (e.g. 0-100 mV) can be scaled
to display the process variable in engineering units.
A signal source is not needed to scale the meter;
simply program the inputs and corresponding display
values.
For instructions on how to program numeric values
see
Setting Numeric Values on page 22 .
Dual-Scale Application
The mV input can be displayed in two different scales,
by enabling the dual-scale feature in the
Setup Input
menu. See Dual-Scale (
d-sCal
) on page 23.
To enable the dual-scale feature you must select it in
the Input selection menu. See
Setting the Input Signal
(
Input
) on page 23 for details.
Scaling the Input for PV1 (
SCAL 1
)
Scaling the Input for PV2 (
SCAL 2
)
Error Message (
Error
)
An error message indicates that the calibration or
scaling process was not successful.
After the error message is displayed, the meter
reverts to input 2 during calibration or scaling and to
input 1 during internal calibration, allowing the
appropriate input signal to be applied or programmed.
The error message might be caused by any of the
following conditions:
1. Input signal is not connected to the proper
terminals or it is connected backwards.
2. Wrong signal selection in Setup menu.
3. Minimum input span requirements not
maintained.
4. Input 1 signal inadvertently applied to calibrate
input 2.
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.
Input Range Input 1 & Input 2 Span
15 mV 0.2 mV
25 mV, 30 mV 0.4 mV
150 mV 2.0 mV
250 mV, 300 mV 4.0 mV