The Hagner Digital Radiometer EC1 UV-A
The Hagner Digital Radiometer, model EC1 UV-A, is a small, handy and extremely easy-to-use instrument for accurate measurement of radiation over a range of 0.001-2,000 W/m². With both automatic zeroing and on/off switch, the only controls needed are a four-position range selection switch and a hold button for retaining the display value.

Operation
To open the lid, press the forward part lightly downward with your thumb and at the same time pull the latch upwards with the first two fingers of the same hand. The Radiometer comes on when the cover is opened and turns off when it is closed. Move the range switch to the range which will give the greatest accuracy and read the display. The hold function keeps the reading on the display until the hold button is released. Full instructions can be found on the inside of the cover.

Maintenance
The power source is a standard 9 volt battery. To avoid battery leakage only alkaline batteries should be used. When LOBAT appears on the display, it is time to replace the battery. However, the Radiometer can be used for approximately 20 hours longer before replacing is necessary.
Change the battery by removing the screw at the front edge of the cover plate, which permits the plate to be lifted up and removed. When replacing it the lower edge of the plate must fit under the two bosses at the lower edge of the case before it can be closed again. The white plastic disc over the detector may be cleaned when necessary with a light damp cloth.

Calibration
The Radiometer is carefully calibrated when it is delivered. Intervals of recalibration may be 1-3 years, depending on the intensity of the radiation to which the detector is exposed, time intervals of exposure and the general environment in which the instrument is used.

The Hagner Digital Radiometer EC1-X UV-A
The EC1-X UV-A has been designed for measurement of radiation levels in places where it is important that the operator does not shade the detector. The EC1-X UV-A has the detector connected with a 2 meter long cable. An extension cable can also be connected.

Operation
The EC1-X UV-A is used exactly as the EC1 UV-A. The detector can be connected or disconnected without causing any damage to the instrument. Care should be taken to ensure that the cable is not twisted when replacing the cable. It is recommended that the detector is rotated rather than winding the cable around the detector.

PLEASE NOTE
The detector is individually calibrated to the respective instrument and can not be interchanged with other detectors. Check carefully that the instrument number in the cover corresponds with the number on the detector.

The controls and other parts of the Radiometer

A. Detector
B. Range switch
C. Holdbutton
D. Screw for coverplate
E. Locking bosses for the coverplate
F. Magnet that switches the instrument on and off

The spectral sensitivity of
the Hagner Radiometer EC1 UV-A

Instrument data for
EC1 UV-A and EC1-X UV-A

Detector

Silicon photodiode

Measuring range

0.001-2,000 W/m² (0.1-200,000 µW/cm²)

Spectral sensitivity

315-380 nm

The angular response of
the Hagner Radiometer EC1 UV-A

Accuracy

Better than ± 4% (± 1 in last digit)

Power supply

9 volt battery type PP3 Alkaline

Dimensions

135 x 75 x 35 mm

Weight

B.Hagner AB, Box 2256, SE-169 02 Solna, Sweden
Phone: 0046 8 83 61 50 Fax: 0046 8 83 93 57
E-mail: hagner@hagner.se