Page 22 (40)
Rev 1 2018-03-21 www.elcon.se
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7 ADJUSTMENTS.
7.1 GENERAL.
The calibration of is done with the software BTS11. Refer to User manual for operating instructions. All analogue
inputs on the are software calibrated. Calibration can easy be done from a calibration guide. All calibration
constants and password for changing constants are saved in the .
Note! Password at delivery is “elcon”
Principle of calibration. Two points are measured at abt.10 respective about 90% of full scale for selected input. The
values are measured with both the and a connected reference instrument. With the equation for the straight
line, new calibration constants are then calculated.
Inputs that shall be calibrated
Coil voltage Uc
Coil current Ic
Motor voltage Um
Motor current Im
Voltage input Uk, Ul
Analog transducers T1, T2, T3
Voltage for resistance Ur
Current for resistance Ir
See 5. Technical Specification for input range and accuracy.
7.1.1 INSTRUMENT NEEDED.
Stable DC-voltage source 1: ±0-250 V DC (used for calibration of motor and coil voltage)
Stable DC-voltage source 2: 0 -5 V DC (used for calibration of transducers analog input)
Stable DC-voltage source 3: 0-200 mV DC (used for calibration of voltage measurement)
Stable DC-current source: 0-10 A (min) (used for calibration of motor and coil current)
Calibrated voltage instrument: 0 -300 VDC accuracy ± 0.2%
Calibrated current instrument: 0 -10 A (min) accuracy ± 0.2%
Calibrated current shunt: 100 -500 µohm accuracy 0.5% or better
Computer: With the software BTS11 installed.
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