pressure readings, you should make an adjustment ratio q=1.65/1.5=1.1. After input the ratio 1.1, all readings will be
multiplied 1.1. Therefore, if you set 1.65KPa again, the display reading is 1.650 (1.500 x 1.1 =1.650)
Remark: the adjustment ratio range is 0.0001 ~ 9.9999
9.Calibration function
It is recommended that the ADT681 be calibrated once per year by a trained professional. For best results before
,.calibration the ADT681 should be exercised to full scale three times If there is an error during the process then use
.the cancellation function
Note: all calibration must place in stable ambient laboratory conditions.take
9.1 Calibration conditions
(1) Environment: temperature: 20℃±2℃ relative humidity: (45-75) % atmosphere pressure: (86~106) kPa.,,
(2) Standard pressure source. Example: Dead weight tester or Additel 9XX series pressure pumps.
(3) High precision reference standard.
9 2 Calibration process.
Select Menu to enter the calibration menu. There are two different pressure gauges:
(1) Single scale gauge: to calibrate first set the low , then pressurize to set the high .,"" ""
,,(2) Dual scale gauge: first set the lower limit then zero then set the higher limit.
The calibration point can be modified if it meets the following conditions:
(1) The pressure value of the 1 point is lower than the 2 point.
st nd
(2) The pressure value of the 2 point value is lower than the 3 point.
nd rd
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