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1.3
Calibration Feature
The calibration feature is useful for calibrating and adjusting pressure transmitters and pressure
switches.
Transmitter Calibration
The CA700 can generate (source) an input signal to a pressure transmitter and measure the output
from the transmitter. If the transmitter input is pressure, you can use a pressure pump to apply the
pressure to the transmitter and monitor the pressure from the pressure pump on the CA700.
The following source and measurement combinations are available.
Measure
Pressure (P)
Pressure (EXT P)
Current (mA)
mA Loop (mA LOOP)
Voltage (V)
1 The CA700 cannot generate pressure. It monitors the input to the calibration target.
Calibration Procedure
You can save up to twenty calibration procedures.
You can set the pressure unit, averaging, scaling, calibration range (0 and 100%), tolerance (%), the
number of calibration points, and the calibration point slope.
Averaging and Scaling
Averaging and scaling are the same as with normal measurement.
Calibration Range
Set the boundaries (0% and 100%) of the range to calibrate in relation to the transmitter input and
output.
The CA700 divides the calibration range by the number of calibration points to determine the
reference value of the transmitter input and output at each calibration point.
Tolerance
The tolerance is the difference between the transmitter output and the reference value that is
determined from the calibration range and the number of calibration points at each calibration
point. The CA700 indicates pass or fail depending on whether the transmitter output is within the
tolerance.
Number of Calibration Points
This is the number of calibration points within the calibration range. This number and the calibration
range determine the calibration points. If this number is set to 1, calibration will be performed at 0%
or 100% (0% if the calibration point slope is up or up/down; 100% if it is down).
Calibration Point Slope
You can set whether to calibrate from 0% to 100% or from 100% to 0% or from 0% to 100% to 0%
in a round-trip fashion. When calibrating in a round-trip fashion, the number of calibration points is (the
specified number of calibration points × 2 – 1).
IM CA700-01EN
Source
Current (mA)
mA loop (mA LOOP)
Voltage (V)
1
Pressure (P)
1
Pressure (EXT P)
1
2
3
4
5
6
7
Index
1-5
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