STEP SYSTEMS LUX Operating Instruction page 2

Dear customer,
we thank you for your acquiring the Lightmeter. With this product, you acquired a state-of-the-art
device. We kindly request the user to respect this operating manual to preserve this condition and to
ensure safe operation.
Prescribed Use
The Lightmeter is a high-precision measuring instrument for the precise measuring of the illuminance
and the incidence of light on a particular area. The measurement is performed via a photoelectric cell
and the measuring result is indicated in four measuring ranges on the LC display. The voltage supply
is ensured by a 12V alkaline battery of the type A23. Do not expose the device directly to water or
humidity; the housing is not water-proof! Clean the exterior of the device only with a dry and lint-free
cloth. Do not use cleansing agents!
A use different from the one described above leads to damaging of this product. Furthermore,
it involves dangers such as e.g. short-circuit, burns, etc. The entire product must not be
opened, modified or rebuilt.
Scope of Delivery:
Digital Lightmeter with permanently installed sensor · carrying and storage case · operating manual
Safety Instructions
Any claims for guarantee will become invalid in the event of damage that results from the non-
observance of the operating manual. We do not accept responsibility for such damage. Nor do
we accept responsibility for damage to property or for personal injuries caused by improper
use or non-observance of safety instructions. Guarantees will not be accepted in any such
case.
The unauthorized conversion and/or modification of the product is inadmissible because of safety and
approval reasons (CE). This device is not a toy. Keep the device out of reach of children! Do not
expose the device to mechanical stress, to moisture or liquids. Only use the device outdoors under
appropriate weather condition or with appropriate protection. The light sensor or the device must not
be heated by the light source. Keep sufficient distance to light sources with strong heat development.
Information on the Correct Illuminance
The illuminance is measured in lux. The adaptability of the human eye is almost unlimited. This easily
leads to demanding of the eye visual performance even if the illumination is not sufficient. If there is no
light or the illumination is not sufficient, the eye can fulfill its visual performance only with great effort or
even cannot see. Very often, this involves eye injuries the number of accidents increases. With the
Digital Luxmeter you acquired a product by means of which you can verify everywhere if the
illuminance is sufficient for the normal visual performance (i.e. everyday tasks). Eyesight means the
detection of brightness and colour differences, form, motion as well as distance. Only with the correct
illuminance, the eye can fulfil its visual performance. Therefore, sufficient illumination is so important.
Concerning light, we often save at the wrong end. Dark zones give an unfriendly atmosphere. Allow
yourself more light. The kind of illumination influences the information that is transmitted by the eye to
the brain. Increase the illumination where precise seeing is necessary. In rooms with an illuminance
inferior to 30 lux, the danger of accidents increases! Older people need more light, because their
visual performance decreased. A 60-year old needs approx. twice the light of a 30-year old.
Description of the Device
(for figure see page 4)
1. Low-Bat indication: symbol for an empty battery. If this symbol appears on the display, the battery
has to be replaced.
2. Indicated value of the measured illuminance. If the display indicates "1", the selected measuring
range is exceeded; switch to the next measuring range.
3. Light sensor with built-in long-life photodiode and protective cap
4. 12V alkaline battery of type A23
5. On/Off and measuring range selector switch
6. Screw for opening of the housing in case of battery replacement
All rights reserved.
Printed in Germany.
STEP Systems GmbH 2016
Duisburger Str. 44
Tel: ++49 (0) 911 96 26 05-0
Fax: ++49 (0) 911 96 26 05-9
D-90451 Nürnberg
e-mail: info@stepsystems.de
www.stepsystems.de