Foxcroft FX-Mini, Руководство по эксплуатации

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Calibration
Full Calibration, Toxic Gas Sensors
Warning: The gas regulator and tubing must be dedicated to one type of gas only, do not use a
regulator and tubing for chlorine that was used on sulfur dioxide or ammonia, or vice versa.
5. Apply target calibration gas with a known concentration that matches the operating range of the
sensor and detector and wait until the readings stabilize on the detector display. The reading will
initially go down for several seconds before rising due to differences in humidity and pressure
between the gas in the cylinder and the gas sensor.
6. Allow five minutes, sometimes slightly less, for the readings to stabilize.
7. Adjust the span potentiometer on the gas sensor until the correct reading is shown on the
display or until 200mV is displayed on a millivolt meter.
8. You may also calibrate by using a millivolt meter:
9. Connect the meter leads, observing polarity, to millivolt test connector CN2.
10. Apply the target gas to the sensor and allow the readings to stabilize as described above.
11. At full concentration the millivolt meter should display 200 mV, if not adjust using the span
potentiometer.