HBM RM4220 - Load Cell: Compressive

17
RM4220
A1091-4.0 en/de HBM
G 
5
Sensitivity  Supplyvoltage
• Set ZERO switch to position 7 (zero = 4.0mV/V).
• Load the transducer with the required full scale and set the voltage full scale
V
m
(current end scale I
m
).
• Check that V
out
= 5V (I
out
= 12mA) for the zero point, if this is not the case,
adjust the Gain (front) so that V
out
= 5V (I
out
= 12mA).
• Relieve the transducer, adjust Zero (front) to 5V (12mA).
• Check the amplification adjustment again.
• The measuring chain is now adjusted and ready for operation.
7.2 Example 2: Load cell with compressive loading
Load cell
• Resistance: 350 Ω
• Full bridge: Six‐wire configuration
• Sensitivity 3mV/V
Configuration (0mV/V for 0V (4mA) and 3mV/V for 10V (20mA))
• 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 3:
G 
10
Sensitivity  Supplyvoltage
• Set ZERO switch to position 2 (zero = 0.035mV/V).
• 3 Hz bandwidth (factory setting).
Adjustment
• Adjust with Zero on the front to 0V (4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).