LightWave Systems Microwave Oven Silicon Power / Wavehead User Manual download pdf (Page 36)

CALIBRATION

Manual Operation User Calibration

20 OMH-6722B

CHAPTER 4

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Manual Operation User Calibration

Front Panel execution of the User Calibration using the OMM-6810B is described

in the procedure below:

• Identify ambient conditions and zero the instrument as described in Section 2.6.4.

• Launch a laser of known wavelength and power into the OMH-6722B.

• Start the calibration by pressing the CAL USER button to place the unit in User Calibration

Mode. The LED above the CAL USER button will light. Press the CAL SET button to initiate

the User Calibration Procedure. The left display will show "CAL-λ".

• The measured wavelength is shown on the right display. Adjust the displayed wavelength to

match the laser's known wavelength using the WAVELENGTH LEFT and RIGHT buttons to

select a digit and then use the WAVELENGTH UP and DOWN arrow buttons to change the

wavelength.

• Press the CAL SET button to complete the wavelength calibration.

• The right display will now indicate “CAL-P”. The measured power will be shown on the left

display. Adjust the displayed power to match the laser’s known power using the POWER UP

and DOWN arrow buttons. If large adjustments are necessary, hold down the UP or DOWN

button to accelerate the change.

• Press the CAL SET button to complete the calibration. The unit returns to real time

wavelength and power measurements.

Remote (GPIB) Operation User Calibration

Remote controlled User Calibration is described in the following procedure. It

may help to be familiar with the manual calibration in Section 6.3 before

attempting it remotely.

• Identify ambient conditions. Block the laser beam from entering the aperture of the OMH-

6722B.

• Start the calibration by clearing the status registers, then zeroing the instrument by issuing

the following GPIB commands:

*CLS

RANGE:AUTO ON

ZERO

• Wait for the zero to finish. The controlling software can monitor the status of zeroing by

sending the following query in a loop. Exit the loop when the response is '1'.

ZERO?

• Launch a laser of known wavelength and power into the aperture of the 6722B. Start the

calibration by sending the following commands.

CAL:USER ON

CAL:USER START

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LightWave Systems Microwave Oven Silicon Power / Wavehead User Manual Page 36