Analog Output; Battery Charging; Computer Interface - THORLABS PM100A Quick Reference

3.2.4 Analog Output

The analog output provides on its SMA connector the amplified and buffered
photo-diode current or thermal sensor voltage.
The signals from the analog outputs are not wavelength, zero and attenuation
corrected! The analog output voltage is range dependent and can be calculated to:
U = 2V / power range value x displayed power value
Analog Out
The analog output voltage can range from -0.3V to +2.3V.

3.2.5 Battery Charging

+
The PM100A is powered by a 1 cell LiPo battery that needs to be recharged
intermittently by plugging the AC adapter or plugging the USB cable to a
computer. To fully charge the battery it takes approximately 3-4 hours. A built in
charging circuit automatically regulates and terminates the charging.
Following battery icons in the display header show the charging state from empty
to full battery
To prevent the battery from total discharge the unit automatically shuts off at a
critical level. Prior to shutting off, the empty battery symbol starts blinking for
approximately one minute.
When an external power supply is plugged the symbols above change sequently
until the battery is fully charged.
In case a wrong power supply is connected, or the charger terminates before the
battery is fully charged, the icon 'terminated' will appear: Please check your
power supply. After disconnecting the power supply, the icon must switch back to
one of the icons shown above.

3.3 Computer Interface

The PM100A optical power meter contains a USB 2.0 interface. When connecting
the PM100A to a PC first time, a new hardware will be found. For proper installing
the PM100A it requires a NI-VISA runtime version on this PC (available on the
National Instruments website www.ni.com) or from the data carrier that comes with
the instrument. Allow installing and follow the dialog instructions.
The PM100A comes with a utility software that easily enables remotely operating
the PM100A (works also with PM100D and PM100USB) for visualizing and logging
measurement data. Perform the setup.exe and follow the installing instructions.
The LabVIEW source code of this application is included on the data carrier as well
and can be used as sample to build own applications or to modify the program to
specific requirements (LabVIEW 8.5.1 or higher required).
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