Omega Speaker Systems RD8300 Calibrating Linear Voltage Inputs, Set Channel, Zero Cal, Full Cal

Figure 7.2 – Calibration Window

Section 7 - Instrument Care and Maintenance

for each channel.

Current Cal RTD – Calibrate the unit‟s current excitation source. Apply a 250 Ohm precision resistor. Doing this on one channel calibrates all channels.

1 Hz Cal – Calibrate the units frequency reference. Apply a 1 Hz signal to channel 1, 6, 7 or 12. Doing this on one channel calibrates all four channels.

Store Cal – This saves the new calibration settings into non-volatile memory.

Set Channel: Activate the Channel to be calibrated. This will enable the Live Data.

Calibrate: Perform the calibration – This is non-reversible.

Live Data: Shows the actual live input on the selected Channel.

Restore Factory Calibration: Will restore the calibration data that was in effect when the unit shipped from the factory by pressing the “Restore” button

Note: Restoring the factory calibration values may negate the current calibration of your unit unless the factory calibrates the unit on a regular basis.

7.3.1 Calibrating Linear Voltage Inputs:

You will need a shorting jumper (no connection to COM) and the voltage calibrator.

7.3.1.1Set Channel

Select the Channel the calibrator is connected to and select the Voltage Range to be calibrated from the drop down menus and press the “Set Chan” button.

The “Live Data” window will show the current value from the connected source and a “Channel has been set successfully” popup will appear. Press “OK” in the top right corner

7.3.1.2Zero Cal

Select the Zero Cal function from the Calibration

Function drop down menu.

Apply 0 Volts (Shorting jumper or set Calibrator to 0V) to the channel selected in step one and press the “Calibrate” button. Doing this on

one channel calibrates all channels. On completion of the step you will get a “Calibration Function OK" popup dialog. Press “OK” in the top right corner.

7.3.1.3Full Cal

Select the Full Cal function from the Calibration Function drop down menu.

Select the Range to be calibrated from the Range drop down menu.

Apply the Full Scale Input voltage for the selected range from the table to the right. The output of the calibrator is connected to the IN+ and IN- inputs on the selected channel. There is NO CONNECTION to COM. (See Wiring Section for connection detail). Note that the full scale calibration value is greater than the voltage range. The “Live Data” window will show the current value from the connected source. Press the “Calibrate” button to complete the calibration. Doing this on

Voltage Range Full Scale Input

±125mV 146mV

±250mV 292.5mV

±500mV 585mV

±1.00V 1.170V

±3.00V 3.125V

±6.00V 6.250V

±12.00V 12.50V

±24.00V 25.00V

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