SONOPAN L-50 User manual

L-50 LUXMETER
INSTRUCTION MANUAL
SONOPAN Sp. z o. o.
ul. Ciołkowskiego 2/2, 15-950 Białystok, Poland
phone/fa [phone]
[email protected]
http://www.sonopan.com.pl

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STANDARDS
Lu meter L-50 fulfills recommendations of International Commission On Illumina-
tion (CIE), published in publication no. 69-1987: „Methods of characterizing illuminance
meters and luminance meters: Performance, characteristics and specifications”.
Device was approved by Polish Central Office of Measures (decision no.
RP T 96 381).
Lu meter L-50 fulfills requirements of EMC standards:
EN 61326 „Electrical equipment for measurement, control and laboratory
use. EMC requirements ”.
EN 61000-6-2 „Electromagnetic compatibility (EMC). Generic standards. Im-
munity standard for industrial environments ”
EN 61000-6-3 „Electromagnetic compatibility (EMC). Generic standards.
Emission standard for residential, commercial and light-
industrial environments ”

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METER CHARACTERISTICS
Lu meter L-50 is designed to measure illuminance of natu-
ral and artificial light, in the range 5.0 ÷ 199 900 l . It can
be used in home, light industrial and heavy industrial envi-
ronment, both indoors and outdoors. It is a universal device
of wide use (e. g. work safety, environmental protection,
laboratory measurements). Thanks to a very good matching
spectral characteristics of detector to the spectral sensitiv-
ity of the human eye for photopic vision, using color cor-
rection factors for light sources other than tungsten is un-
necessary. Photometric probe is equipped with a very good
angular correction, matching the directional characteristic
to cosine curve.

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Reading of measured value is done on the LCD, directly in lu or kilolu . E ceeding the
measuring range (overload) is indicated by one on the first digit and e tinguishing of re-
maining digits.
Lu meter is equipped with HOLD function, which temporary suspends measuring proc-
ess. In that case, last measured illuminance result is displayed on the LCD. In that mode,
changing of measuring range is not possible.
WARNING: Luxmete and measu ing p obe a e a complete set which should be
calib ated togethe .
Meter has a foil keyboard consisting of four keys:
on/off - turning on / off the meter,
- changing measuring range to directly higher,
- changing measuring range to directly lower,
hold - turning on / off HOLD function.
Selected measuring range is indicated by measuring unit selection (lx or klx) and appro-
priate placement of the decimal point on the display.
The device turns off automatically after about 10 minutes after last keystroke.

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TECHNICAL SPECIFICATION
• accuracy class A (CIE)
• accuracy ≤ 2.5% (CIE)
• spectral matching: f
1
’ ≤ 2% (CIE)
• cosine correction matching: f
2
≤ 1.5% (CIE)
• reading range: 0 ÷ 199 900l
• measuring range: 5.0 ÷ 199 900l in subranges:
(200l ) 5.0 ÷ 199.9l (resolution 0.1l )
(2000l ) 50 ÷ 1999l (resolution 1l )
(20kl ) 0.5 ÷ 19.99kl (resolution 10l )
(200kl ) 5.0 ÷ 199.9kl (resolution 100l )
• changing of measuring range: manual
• power supply: Battery 9V (IEC: 6F22)
• current consumption: ca 3mA
• weight with battery: ca 300g
• dimensions: 152 83 33mm
• operating temperature: 0 ÷ 40°C
• operating relative humidity ≤ 80%

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BASIC ACCESSORIES
• photometric probe, • battery,
• carrying case, • instruction manual,
• warranty card, • photometric probe relative spectral sensi-
tivity chart.
ADDITIONAL ACCESSORIES
• photometric probe handle.
OPERATION
• Connect covered photometric probe to the lu meter. Make sure that cover on the
probe is completely sealed
• Turn lu meter on using on/off key. Measuring range 2000l will be chosen auto-
matically.
• Check and if necessary correct zero on the lowest measuring range (use screw-
driver on the hole located on the right side of the instrument).
• Uncover photometric probe and select appropriate measuring range using keys
.
• Read measured value.

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• To freeze reading use hold key. Continue of the measure is possible after ne t
pressing of that key.
WARNING: Calib ation knob is located on the left side of the inst ument. Chang-
ing calib ation adjustment will void calib ation ce tificate.
RECOMENDATIONS FOR INSTRUMENT USE
• Glass surface of photometric probe should be clean. In case of dirt, clean up gently
using soft cloth. Uncover photometric probe only for the time of measurement.
Protect the probe from e cessive moisture and temperature. Do not e pose it to
prolonged e posure of strong sunlight. Continuous measure is permitted only to il-
luminance value of 150kl . Above this value, measure time should be reduced to
no more than 30s.
• Do not use the instrument at too low supply voltage. Battery voltage drop below
limit value is signaled by bat indicator.
• For long term storage, remove the battery.
• The instrument with measuring probe should be stored and transported only in the
factory carrying case.
• Keep the device with measuring probe away from factors that can cause mechani-
cal damage.

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BATTERY REPLACEMENT
To open the battery compartment, remove the two screws from bottom of the in-
strument case.
MAINTENANCE AND REPAIRS
Lu meter L-50 does not require any special maintenance e cept to follow the rec-
ommendations for instrument use. User only need to check the condition of the bat-
tery. All epai s of the inst ument a e pe fo med by manufactu e .
CE MARKING AND CONFORMANCE TO EU COUNCIL DIRECTIVES
The product described in this instruction conforms to following EU Council Directives:
2004/108/EC Electromagnetic Compatibility.
The conformance to above-mentioned requirements is confirmed by CE
mark.
This product cannot be thrown away with household waste. Deposit the
product in an authorized electrical and electronic waste collection area for
recycling. Contact local Municipal Bureau or nearest waste disposal com-
pany to get more detailed information.