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Atmospheric Pressure Calibration
Prepare a standard pressure gage, remove the atmospheric pressure sensor tube, and connect the
gage.
1. In the calibration mode, set the atmospheric pressure span value to 1.000, and return the zero
value to 0.000.
2. Set the mode display to atmospheric pressure display. (See page 21.)
3. Record the value of standard atmospheric pressure gage and the sampler's atmospheric
pressure display value.
4. Calculate the zero value.
5. If you are performing a 2 point calibration, establish a different pressure, and proceed from step 2.
6. Switch to the calibration mode, and enter the obtained span value and zero value.
Flow Rate Correction Method
This product can display a 20
°
C 1 atmospheric pressure corrected flow rate, a 25
°
C 1 atmospheric
pressure corrected flow rate, a 0
°
C 1 atmospheric pressure corrected flow rate, or the actual flow rate.
In addition, the blower can be controlled so as to ensure that the flow rate display matches the
configured flow rate. The flow rate is calculated from the following flow rate formula, and correction is
performed in accordance with the selected flow rate correction method.
Qc: Flow rate calculated under standard conditions (L/min)
Qa: Actual flow rate (L/min)
Pa: Atmospheric pressure (hPa)
Ps: Standard atmospheric pressure (1013.25 hPa)
Ta: Atmospheric temperature (
°
C)
Ts: Standard temperature (
°
C)
The cumulative flow rate is calculated by summing the instantaneous flow rate units corresponding to
the selected flow rate correction method, in 1 second units.
Communications
Sampling data can be retrieved by connecting a PC using the USB port provided on the product. No
particular communications software is prepared, but products such as HyperTerminal can be used.
A special USB driver is required for communications. The USB driver can be downloaded from Sibata
website:
(http://www.sibata.co.jp/technology/technology-27640/)
In addition, please refer to the online manual available at Sibata website for details on communications
commands.