RM4220
16
A1091-4.0 en/de
HBM
7
Applications
7.1
Example 1: Load cell with tensile/compressive
loading
Load cell
•
Resistance:
350
Ω
•
Full bridge:
Six‐wire configuration
•
Sensitivity
3mV/V
Configuration (‐3 mV/V for ‐10 V (4 mA) and 3 mV/V for 10 V (20 mA))
•
Set OUTPUT switch to +/- 10V.
•
Set 4 WIRE/6 WIRE switch to six‐wire configuration.
•
Set EXCITATION switch to supply voltage 10V (factory setting).
•
Set GAIN switch to position 3:
G
10
Sensitivity
Supply
voltage
•
Set ZERO switch to position 2 (zero =
0.035mV/V).
•
3 Hz bandwidth (factory setting).
Adjustment
•
Relieve the transducer.
•
Adjust with
Zero
on the front to 0V (12mA) with a voltmeter (amperemeter),
if the zero point is unstable, then change the zero point setting ZERO to
position 3 and adjust
Zero
again.
•
Load the transducer with the required full scale.
•
Adjust the
Gain
on the front to 10V (20mA) with a voltmeter
(amperemeter).
•
Check the zero point adjustment again.
•
The measurement chain is now adjusted and ready for operation.
Alternative setting
For 0
…
10V (4
…
20mA) output:
•
Set OUTPUT switch to position 0/10V (factory setting).
•
Set 4 WIRE/6 WIRE switch to six‐wire configuration.
•
Set EXCITATION switch to supply voltage 10V (factory setting).
•
Set GAIN switch to position 2:
