STEP SYSTEMS LUX Operating Instruction page 3

Carrying out Measurements
Before commissioning, please observe the instructions concerning the Prescribed Use as well
as the Safety Instructions and the Technical Data.
- Turn the On/Off switch (5) to the desired measuring range.
- Remove the protective cap from the light sensor and hold it horizontally ensuring that the light hits
the light sensor vertically. Avoid shadows of your own body in direction of the sensor.
- Read the value (2) indicated on the display. In the measuring ranges of 200 and 2000 lux, the
indicated value corresponds to the intensity of light in lux. In the measuring range of 20000 lux,
you have to multiply the indicated value on the display by 10; in the measuring range of 50000 lux, you
have to multiply it by 100 to determine the correct light intensity.
- In case of overflow indication ( "1" is indicated on the display), please switch to the next measuring
range to determine the correct light intensity.
- After the measuring process, please switch off the device (On/Off switch to "OFF") and put the
protective cap back onto the sensor.
Replacing the Batteries
The device is already equipped with a built-in 12V alkaline battery of the type A23 when being
delivered. As soon as the Low-Bat indication (1) appears on the display, please replace the battery
because otherwise, the precision of the indication is no longer guaranteed. To replace the battery,
proceed as follows.
- Remove the housing screw (6) on the back of the device with an appropriate screwdriver for
recessed-head screws and carefully remove the back of the device.
- Remove the empty battery and replace it by a new one of the same type. Ensure correct and secure
position of the battery.
- Put the back of the housing back onto the device and close the device by fastening the housing
screw (6).
The user is legally obliged (old battery regulation) to return all used batteries (from round cells to lead
storage batteries) to a specialist dealer's shop where there are special facilities (collecting boxes). It is
forbidden to dispose of batteries in the garbage bin or litter. You can return your used batteries and
storage batteries free of charge either to our subsidiaries or to our central office in Nürnberg or
reusable-waste facilities which are obliged to take back old batteries. Make your contribution to
environmental protection!
Stairs, basement, loft
Garage, hall, lumber rooms
Kitchen, hobby workshops, living rooms, housework rooms, waiting rooms
Meals, kitchen work and hobbies, office and laboratory work
Hall, cloakroom, toilet, bathroom, children's room, storeroom
Reading, writing, homework or handicrafts, painting, cosmetics
technical drawing, precision work, precise testing, judging colours
Disposal
Dispose of the unserviceable device according to the relevant statutory requirements.
Technical Data
Measuring range . . . . . . . . . . . . . : 0.01 up to 50,000 lux
Accuracy . . . . . . . . . . . . . . . . . . . : ± 5% + 10 digits (< 10,000 lux)
. . . . . . . . . . . . . . . . . . . . . . . . . . . ± 10% + 10 digits ( > 10,000 lux)
Repeatability . . . . . . . . . . . . . . . . : ± 2%
Measuring rate . . . . . . . . . . . . . . : 1.5 times per second, nominal
Voltage supply. . . . . . . . . . . . . . . : 12V alkaline batteries of type A23
Overflow indication . . . . . . . . .
. : 1 (highest digit)
Standard Values for Illuminance
All rights reserved.
Printed in Germany.
STEP Systems GmbH 2016
30 lux
60 lux
250 lux
500 lux
720 lux
750 lux
7000 lux
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