OHAUS Defender 6000 Series, Руководство по обслуживанию

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Ohaus Corporation www.ohaus.com 9 Defender
™ Series Bases Service Manual
Figure 1-3. Route of electrical Load Cell input and output through Wheatstone Bridge circuit.
A Load Cell is a force sensor, which receives a voltage (excitation) from a regulated power source in the
Indicator, and sends back a low-voltage milli-volt (mV) relative to the force applied. The Load Cell signal is
read by the Indicator, which converts it to a numeric value and shows it visually. This output value increases
as weight is loaded to the Load Cell.
For example, a 500kg Load Cell with 2mV/V output and 5V excitation would have a change of 0.02mV per kg
change in the load, that is, 10mV/500=0.02mV per kg. At a load of 250kg the signal voltage would thus
increase by 5mV from the value measured at no load.
1.11 Load Cell Connection
Type1. For models i-D3K1S, i-D6K1S, i-D15K1R, i-D30K1R, i-D60K1L bases
FUNCTION WIRE COLOR
+ Excitation Blue
- Excitation Black
+ Signal White
- Signal Red
+ Sense Green
- Sense Grey
Shield Yellow
Tension
Tension
Compression
Compression
+Excitation
(Supply)
– Excitation
(Supply)
INPUT(volts)
LOADCELL
2 mV/V
Strain
Gauges
4 strain gauges
connected as a
Wheatstone
Bridge
OUTPUT (milli volts)
+ Sig
– Sig