Applications; Example 1: Load Cell With Tensile/Compressive Loading - HBM RM220 Bedienungsanleitung

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Applications

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