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b) Connect power supply (optional)
• The power supply must provide a stabilised voltage of 9 V/DC and a current of at least 300 mA.
• The DC barrel plug must have the following specifications:
- Outer diameter 5.5 mm
- Inner diameter 2.5 mm
- Polarity: Inside positive pole, outside negative pole.
• To connect the power supply, open the side cover (12). Use a small flat-head screwdriver for this
purpose, for example.
• Insert the DC barrel plug of the power supply into the “DC IN” socket.
• Connect the mains adapter to a common household wall socket.
The wall socket must be nearby and easily accessible.
After completion of the measurement, disconnect the power supply from the meter and close the cover.
9. Setup
a) Connecting the sensor
The sensor is a high-precision component that wears out due to excessive humidity and thus
becomes inaccurate. Therefore, the sensor head should always be stored in as dry an environment
as possible.
It is also recommended that the sensor be stored in an airtight foil bag. Put a packet of dry granules
in the foil bag. Replace or regenerate these dry granules on a regular basis to ensure a dry storage
environment.
Remove the sensor from the bag for measurement purposes only. This measure extends the ser-
vice life of the UV sensor. Otherwise, the sensitivity decreases and the recalibration interval is
shortened.
When connecting the sensor, make sure that the meter is turned off.
Insert the sensor connection plug (14) into the sensor socket (1) on the meter, observing the correct polarity. The flat
side of the plug should thus face the back of the meter.
b) Switching the measuring instrument on and off
• Use the “POWER” on/off button (4) to turn the meter on and off. Each time you press the button, the device turns
on and off.
• The meter will turn on with a short beep and display the start screen with all display segments for approx. 3 seconds.
• After the display test is completed, the display shows the current measured value.
• Press the on/off button to turn off the device. The device turns off with a long beep.
