2.6 Performing Zero Calibration
Procedure
1.
Maintain the CA700 in an orientation for measuring pressure, and open the input.
When the pressure measurement display is showing, press
ZERO
.
A message appears for you to confirm the execution of the zero calibration.
2.
Press
ENTER
. Zero calibration is executed.
To cancel zero calibration, press
ESC
.
Explanation
Zero calibration refers to the act of correcting the influence caused by changes in the temperature and
installation environment in order to perform highly accurate pressure measurements.
Be sure to perform zero calibration before making measurements.
To use the external pressure sensor, you also need to perform zero calibration of the sensor. For the
zero calibration of the external pressure sensor, see the manual of the sensor.
If the environmental conditions change while you perform continuous measurements, occasionally
perform zero calibration.
Note
• Zero calibration is effective even if you change the unit of pressure.
• Perform zero calibration after warm-up.
• For liquid measurements, fill the pipe and the instrument (measurement system) with liquid first, and then
perform zero calibration.
• Every time you change the orientation of the CA700, perform zero calibration.
• If it is necessary to match the pressure reference with a gauge, such as a pressure balance whose
pressure reference position is clear, align it with the reference point of the pressure receiving section as
shown below before starting zero calibration.
38
Reference point of the
pressure receiving section
96
Measurement Orientation
To measure pressure, install the instrument horizontally with the front panel facing up or tilted using
the rear panel stand. If you change the orientation of the CA700 when the measurement display is
showing, the “ZERO CAL” indicator will blink in the display. If this happens, be sure to perform zero
calibration.
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IM CA700-02EN
Summary of Contents for CA700
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