ASHA Beam Profile PMB-201 Посібник - Сторінка 14

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Preparation and Measurement

To set up the device, first it is necessary to put the sensor perpen-

dicular to the beam axis with the proper connection at the desired

location, and then connect the sensor cable to the device.

The device has a display on its front panel, and it's possible to directly

display the result on the screen in addition to measuring through the

multimeter. The output of this device, according to the order, is able

to be calibrated for required ranges, so that the output voltage of the

device will be a coefficient of beam power.

The display on the device shows the exact amount of optical power

according to the selected range. If the voltmeter is used at the range

of 200mW, the measured voltage is ten times the real power value. In

the 20W range, the measured voltage is one-tenth of real power and

in the 2 W power range, the reported voltage is the same as the real

value of power.

If you want to measure power using a voltmeter, using the supplied

cable, connect the analog output of the device (BNC port) to the cor-

responding BNC cable, then connect the black probe to the COM port

and the red probe to the voltmeter. Then turn on the device by using

the On/Off key. If the device has enough battery, the display on the

front panel of the console will turn on. Otherwise, connect the adapter

to the input power connector. In this case, the charging light turns on,

which means that the battery is charging and you can use the console

at the same time. When the battery is fully charged, the red light will