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model 2704 controller installation and operation handbook - Soliton

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Transducer Scaling<br />

<strong>2704</strong> Controller<br />

19.3. LOAD CELL CALIBRATION<br />

A load cell with V, mV or mA output may be connected to the PV Input, Analogue Input or<br />

Modules 1, 3, 4, 5, 6 supplied as analogue inputs. The wiring connections are shown in<br />

Sections 2.3.3, 2.3.4, <strong>and</strong> 2.4.2 respectively.<br />

The load cell is calibrated as follows:<br />

1. Remove any load <strong>and</strong> start the procedure using the low point calibration parameter ‘Start<br />

Pnt1 Cal’, or a digital input wired to this parameter. The <strong>controller</strong> will calculate the low<br />

calibration point<br />

2. Place a reference weight on the load cell <strong>and</strong> turn on the high point calibration parameter<br />

‘Start Pnt2 Cal’, or a digital input wired to this parameter. The <strong>controller</strong> will then<br />

calculate the high calibration point.<br />

Note:-<br />

If ‘Start Pnt1 Cal’ = ‘On’, ‘Start Pnt2 Cal’ cannot be turned to ‘On’.<br />

If ‘Start Pnt2 Cal’ = ‘On’, ‘Start Pnt1 Cal’ cannot be turned to ‘On’.<br />

Either must complete before the other can be set to ‘On’.<br />

Reference Weight<br />

Controller under<br />

Calibration<br />

Load Cell<br />

Figure 19-2: Load Cell Calibration<br />

19-6 Installation <strong>and</strong> Operation H<strong>and</strong>book. Part No HA026502 Issue 1.0 Apr -00

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