Sauter GmbH
Ziegelei 1 Tel: +49-[0]7433- 9933-199
D-72336 Balingen Fax: +49-[0]7433-9933-149
E-Mail: info@sauter.eu Internet: www.sauter.eu
Instruction Manual
Digital Lightmeter
SAUTER SP 200K
Version 1.0
01/2017
GB
SP_200K-BA-e-1710
SAUTER SP 200K
GB Version 1.0 01/2017
Instruction Manual
Digital Lightmeter
The purchase of this SAUTER Digital Light meter marks a step forward into the field
of measurement precision. Although this is a complex and delicate instrument, its
ruggedness will allow many years of use. Please read the following instructions care-
fully and always keep this manual within easy reach.
We hope you are pleased with your high quality Light Meter. If you have any queries,
wishes or helpful suggestions, do not hesitate to call our service number.
Table of contents:
1. Instruction ...................................................................................................... 3
2. Features .......................................................................................................... 3
3. Specifications ................................................................................................ 3
4. Name of parts and positions ......................................................................... 4
5. Spectral sensitivity characteristics .............................................................. 5
6. Operation instructions .................................................................................. 5
7. Battery check and replacement .................................................................... 6
8. Maintenance ................................................................................................... 6
9. Recommended illumination .......................................................................... 6
2 SP_200K-BA-e-1710
1. Instruction
This digital light meter is a precision instrument used to measure illuminance in the
working area. It is totally cosine corrected for the angular incidence of light.
The light meter is compact, tough and easy to handle due to its construction. The
light sensitive component used in the meter is a very stable, long life silicone diode.
2. Features
• Light-measuring levels ranging from 0.1Lux to 200.000 Lux, or in FC from 0 to
20.000 FC (foot candle)
• High accuracy and rapid response
• Peak-Hold function for capturing peak values
• Unit and numeral display for easy reading
• Automatic zeroing
• The Correction factor doesn’t have to be manually calculated for non-standard
light sources
• Short rise and fall times
• Suitable for LED light
3. Specifications
Display: 3 ½ digit LCD
Measuring range: 200; 2.000; 20.000; 200.000 Lux
(20.000 Lux range reading x 10, 200.000 Lux range reading x 100)
20; 200; 2.000; 20.000 FC
(20.000 FC range reading x 10)
1 FC= 10.76 Lux
Over range display: Highest digit of “1” is displayed
Accuracy: ± 4% rdg ± 10 Digit bis 20.000 lux / 2.000 FC
± 5% rdg ± 10 Digit bis 200.000 lux / 20.000 FC
Calibrated to standard with an incandescent lamp at colour temperature 2856K
Repeatability: ± 2%
Temperature Characteristics: ± 1%/°C
Measuring Rate: approximately 2 times/sec.
SP_200K-BA-e-1710 3
Photo detector: one silicone photo diode with filter
Operating Temperature: 0°C to 40°C (32°F to 104°F)
Operating Humidity: 0 to 70 RH
Storage Temperature: -10°C to 50°C (14°F to 122°F)
Storage Temperature: 0 to 80% RH
Power Source: One 9V battery, 6F22
Battery life (typically):200h
Dimensions: 185mmx68mmx38mm
Weight: 130g
Accessories: Carrying bag, instruction manual, battery
4. Name of parts and positions
1. LCD Display: 3 ½ digits with a maximum reading of 1999.
2. Power key: the power key turns the light meter ON or OFF.
4 SP_200K-BA-e-1710
3. HOLD button: With the HOLD key you can freeze the actual measurement
value. The device does not show any other measurement values, unless the
HOLD button is pressed again.
4. Range button: the range button has to be pressed to change the ranges of
200Lux/20FC; 2.000Lux/200FC; 20.000Lux/2.000FC; 200.000Lux/ 20.000FC
circularly.
5. Lux/FC Unit button: This key has to be pressed to change between the Lux or
FC unit.
6. Photo detector
7. Cover of the photo sensor. It serves to protect the sensor if you don’t use the
light meter.
5. Spectral sensitivity characteristics
Concerning the detector, the applied photo diode with filters makes the spectral sen-
sitivity characteristic almost meeting the standard C.I.E. (International Commission
on Illumination) photopic curve V ( ) as described in the following chart below:
6. Operation instructions
1. Power-key: The power key has to be pressed to turn the light meter ON or
OFF.
2. Selection of the Lux/FC scale: The range selection switch has to be set to
the desired Lux/FC range.
3. The photo detector cap has to be removed and it has to be faced to the light
source in a horizontal position.
4. The illuminance nominal value can now be read from the LCD display.
5. Over range: If the instrument only displays one “1” in the M.S.D., the input
signal has been too strong and a higher range should be selected.
6. Data-HOLD mode: The HOLD key has to be pressed to select the HOLD
mode, the light meter will stop all further measurements. If the HOLD button is
pressed again, this operation will be cancelled and the light meter will return to
normal operation.
7. When the measurement is completed, the photo detector cap has to be
clipped on again and the power key has to be turned off.
8. Turn the device off
SP_200K-BA-e-1710 5
7. Battery check and replacement
1. As the battery power is not sufficient, the LCD will display the symbol
and replacement of a new battery type 9V is required.
2. Therefore, the instrument has to be powered off. Then the battery cover has to
be pressed and pushed (at the same time) in the direction of the arrow shows
to open.
3. The battery has to be disconnected from the instrument and replaced with a
standard 9V transistor battery.
4. The battery cover has to be snapped on again.
8. Maintenance
1. The white plastic disc on the top of the detector should be cleaned with a
damp cloth from time to time and if necessary.
2. The instrument may not be stored when temperature or humidity is exces-
sively high.
3. The calibration interval for the photo detector will vary according to operational
conditions, but generally the sensitivity decreases in direct proportion to the
product of luminous intensity by the operational time.
In order to maintain the basic accuracy of the instrument, a periodical calibration is
recommended.
9. Recommended illumination
Office
Meeting room 200-750
Office work 700-1500
Drawing, PC work 1000-2000
School
Big Classroom, Gym 100-300
Classroom 200-750
Labratory, libary, drawing room 500-1500
Hospital
Sickroom, Storage 100-200
Treatment room 300-750
Operating 750-1500
Emergancy department 750-1500
6 SP_200K-BA-e-1710
Factory
Goods income 150-300
Work at a production line 300-750
Quality check 750-1500
Assembly work of electronic parts 1500-3000
Hotel
Public room, cloakroom 100-200
Reception, Counter 220-1000
Shop
Entrance area 150-200
Shop window, packing counter 750-1500
Front sector of a shop window 1500-3000
Note:
If the protective cap is placed on the photoelectric sensor, the reading shows
“0.00” on a continuous basis; if this is the case, do not manipulate the potenti-
ometer at the back of the housing.
SP_200K-BA-e-1710 7
