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BT21i Current sensor User’s Guide
Technical Specifications
Sensor kind
Analog, generates an output voltage between
-‐7 and 7
V
Measurement range
-‐ 5 A .. 5 A
Resolution
3.8 mA
Sensitivity
1.28 V/A
Calibration function
I (A) = 0.78125 * V
out
(V) – 0.0047
Shunt
0.04
Ω
(2 Watt)
Input impedance to ground
each terminal 400 k
Ω
Input offset current error
typical ± 8 mA
Common mode input voltage error
typical 1.5 mA/V (0 – 500 Hz)
Non-‐linearity
< 0.001 %
Slew rate
3 V/
µ
s (maximum output voltage variation)
Bandwidth (small signal)
120 kHz (-‐3dB)
Maximum common input voltage
Maximum current
± 50 V (max. voltage related to ground)
7 A
Supply voltage
5 V DC
Supply current
typical 23 mA
Connection
IEEE1394 connector for BT-‐IEEE1394 sensor
cable. Sensor cable not delivered with the
sensor.
Warranty:
The Current sensor BT21i is warranted to be free from defects in materials and
workmanship for a period of 12 months from the date of purchase provided that it
has been used under normal laboratory conditions. This warranty does not apply if
the sensor has been damaged by accident or misuse.
Note:
This product is to be used for educational purposes only. It is not appropriate
for industrial, medical, research, or commercial applications.
Rev. 20
/11/2014
