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8 9 To set the automatic shutdown.
Select sets the automatic shutdown function. (1/5/10/15/30/45/60/90/120 minutes and off function can,
be set)
8 10 To set the 4 or 5 digit display.
Select to change the 4 or 5 digit display.
8.11 Set custom unit factor
Select , sets the coefficient of customized pressure units. In the other words, user can customize a
pressure unit by setting a conversion ratio based on pressure unit “kPa”. This ratio's range is from 0.0001 to 99999,
but only shows 5 digits.
For example: The coefficient is 1000 as coefficient, the display pressure value is equal with the pressure with unit
“Pa”. The symbol of customized pressure unit is “C”. The conversion format: 1kPa = coefficient x C.
8 12 Set tare function.
Select , sets a pressure as new reference zero (the pressure unit should be kept the same as main menu).
8.13 Set single-point calibration
Select , sets single point calibration.
(1) Pressure zeroing
(2) Set one non-zero pressure point, records the display pressure readings.
(3) Calculate the adjustment ratio accordingly and set it in the Additel 681.
Example: Set 1.65kPa standard pressure, but the display pressure reading is 1.5kPa. In order to correct the display
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