RAM 6000 Technical Information PDF herunterladen (Seite 169)

Software Manual 169

Automation Tab

Calibration

• Click on the Calibration button and the following dialog window will appear:

Channel: A channel is a physical IO point that can be either analog or digital.

User Zero Correction: Manually adjust the user offset calibration for analog inputs/outputs. Every analog/input is cali-

brated at the factory according to the specified accuracy. The user calibration is supplied to account to adjust the

reported values to account for wiring or instrumentation errors. For this reason, most inputs/outputs will NOT need to

be calibrated.

Zero or Offset calibrations are used to adjust the reported value from 5 to 15% full scale. The calibration can be

adjusted coarsely by moving the slide bar from left to right with a mouse. For fine adjustments, use the -/+ buttons on

either side of the slide bar. The corresponding adjustment will be displayed in the calibration configuration. The cali-

bration will not take effect until the apply button is clicked.

A negative adjustment (negative calibration value) will cause the reported channel value to go down. A positive adjust-

ment (positive calibration value) will cause the reported channel value to go up. The larger the calibration value the

greater the difference will be between the reported channel value and the actual measured value.

Instructions on adding user calibrations:

Use this method to calibrate a channel using the manual slide bar user calibration.

1. Set your analog signal device for a near minimum (5 to 15% full scale) output. Measure the device’s output at the mod-

ule’s screw terminals with a precision meter or external standard monitor.

2. Apply the small signal to the analog input channel. Compare the value currently being reported with the value on your

meter. If they are not equal, adjust the Offset value by the using the slide bar and arrows in the Offset display box. Click

the Apply button and observe the effect of the new offset factor. Repeat this step until a satisfactory reading is obtained.

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RAM 6000 Technical Information Seite 169