Mutec MF3000 Ex, Руководство по обслуживанию

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11/2018
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10.3. Products: Input calibration
Fig. 21
Calibration of measuring value:
Calibration time - Filter 1
st
order adjustable between 1 … 999 s
Number of calibration - 2-point-calibration for linear characteristic line or up to
points
10-point-calibration for not linear characteristic curve
Input attenuator - 4 dividing factors: 140:1, 70:1, 18:1 and 1:1 enable an
optimal input signal adaption
Gain - available gain factors between 70 and 1280
1. / 2. Calibration point/ - The raw value can be inserted manually or
Read raw value automatically by using the button read raw value
Any calibration value in the calibration mask must be stored first, before pressing another button in the
screen mask.
Changed parameters and calibration values will be lost by leaving the screen mask. They will be
transferred and stored in the MFI3000 by the instruction
Extras/Program parameters and calibration
.
Important information about sensor calibration:
The measured value is digitized by a 10-Bit ADC and consists of values between 0 and 1023. In order
to avoid any distortion of the characteristic curve, the product of input attenuator and gain has to be
adjusted in the way that the available value range of max. 1023 digit will not be exceeded. For a high
measuring accuracy, the smallest possible input attenuator should be used in order to keep the
adjustable gain factor small as well. The input attenuator and gain should be selected with respect to
the digital value at the end of the measuring range (100 % - value).