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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:
www.
stepsystems.de
5. Changing the battery, connection and working position
5.1 Changing the battery
For your battery to operate correctly, it must be fitted with a 9V battery. If the low-battery symbol LBT
appears at the top left of the display (at a battery voltage below about 6.5V to 7.5V), you will have to do a
battery change to maintain 'full' precision of measurement. To do this proceed as follows:
Disconnect the sensor from the measuring instrument which should be switched off. Using a suitable flat-
blade screwdriver, carefully prise off the battery compartment cover on the lower underside of the casing.
Unclip the used battery from the connector and replace it with an unused battery of the same type,
observing the correct polarity. After completing the battery change, lay the battery in the battery
compartment which should then be carefully closed again. Take care not to pinch the connector leads to
the battery clip.
Caution!
False polarity will inevitably lead to destruction of the instrument. Under no circumstances operate the
instrument when opened. Do not leave used batteries in the instrument since even leak-proof batteries
can corrode, thereby releasing chemicals which are harmful to your health and will destroy the battery
compartment. Used batteries do not belong in normal waste: they are to be regarded as hazardous waste
and must therefore be disposed of carefully, compatible with the environment.
5.2 Connecting the light sensor
The measuring instrument comes with a light sensor and its cover. Connect the 4-pole plug of the light
sensor to the INPUT socket on the instrument so that the lug of the plug points to the underside of the
casing. Ensure the plug is always firmly seated in the socket otherwise errors in readings may occur.
5.3 Working position
The Lux-Multimeter must not be operated whilst lying on its keys: the display must always be readable.
6. Operation and taking measurements
6.1 General
a)
Switch on the Lux-Multimeter by the ON/OFF switch. After a short initialisation phase, during which all
segments of the LCD appear (self-test), the instrument is ready for operation.
b)
Cover the light sensor (4-10) with the cover cap (4-11) and set the range switch to 2000 lx (200 ft-cd).
c)
Operate the ZERO key once: the display will then be set to '0'. Next remove the sensor cover again.
Caution!
Above a casing temperature of about +60°C the display may darken or the LCD become black with the
result that the display will no longer be readable. The luxmeter is not defective: the blackening
disappears as soon as the temperature falls below about 60°C. (Take note of the technical data, including
the working temperature range of the instrument).
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