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2021-01
3.1
Power supply
The Vario Photometer II can be operated as desired using a power supply, a (9V
block) battery or (model 6F22 or PP3) rechargeable battery.
3.1.1
Mains power operation
The Photometer is supplied with a power supply unit for operation on a mains
voltage in the range of 100 V ... 240 V AC. The mains plug is marked with a
Diaglobal logo (sticker).
The connector plug of the power supply unit is connected to the power supply
socket on the back of the device.
3.1.2
Network-independent operation
To insert the rechargeable battery or the normal battery:
Unscrew the knurled screws on the bottom of the unit and remove the battery
compartment cover. Connect the battery to the push-button contact and insert it
into the device. Replace the battery compartment cover and screw in the knurled
screws.
Please note:
The Vario Photometer plus can be operated using a power supply without the need
to remove the rechargeable battery or the normal battery.
The rechargeable battery cannot be charged while it is installed. A separate
battery charger is required for this purpose.
3.2
Measuring system
The optical section is shown in Fig. 2.
Fig. 2
The light emitted by an LED is first selected into its wavelength ranges (365 nm
and 520 nm) by an interference filter IF (HBW ~ 5 nm) and then bundled and
directed onto the cuvette in the shaft. After passing through the cuvette, a
broadband photosensor converts the light falling on its sensor surface into a
current, proportional to the intensity.
