sauter SO 200K User manual

Sauter GmbH
Ziegelei 1
D-72336 Balingen
e-mail: [e-mail]
Phone : +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.sauter.eu
Instruction manual digital light meter
SAUTER SO 200K
Version 2.0
011/2020
GB
SO-BA-e-2020
PROFESSIONAL MEASURING

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D
SAUTER SO 200K
V. 2.0 12/2021
Instruction manual digital light meter
Congratulations on purchasing this lighting knife from SAUTER. The purchase of this
device once again enables a step forward in the accuracy of measurement technology.
Although it is a complex and very sensitive instrument, it is still very robust and will last
you many years if used correctly. Please therefore read the operating instructions
carefully and keep them within easy reach.
We wish you much pleasure with your quality measuring instrument. For questions,
wishes or suggestions we are always at your disposal.
Table of contents
1General information....................................................................................... 3
2Functions........................................................................................................ 3
3Technical description.................................................................................... 3
4Function keys and part designation............................................................. 4
5Influencing variables of spectral sensitivity................................................ 5
6Steps to commissioning ............................................................................... 5
7Check and replace batteries ......................................................................... 5
8Maintenance................................................................................................... 5
9Examples of recommended illuminance levels........................................... 6

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1 General information
This digital illuminance meter is a precision instrument for measuring illuminance in the
work area. The sensor has a full cosine correction for oblique light incidence. The
instrument is compact, robust and easy to use due to its design. The light-sensitive
component used in this light meter is a very stable, long-life silicon diode.
2 Functions
* The light measuring level ranges from 0.1Lux to
200,000 Lux, 0.01 FC (food candle) to 20,000 FC, in repetition
* High accuracy and fast response
* Peak-Hold function for recording peak values
* Unit and number display for easy reading
* Automatic zero setting
* Non-standard light sources are automatically
corrected
* Short rise and fall times
3 Technical description
Display: 3 ½ digit LCD
Measuring range: 200; 2,000; 20,000; 200,000 Lux
(20,000 Lux reading value x 10,
200,000 Lux reading value x 100)
20; 200; 2,000; 20,000 FC
(20,000 FC reading x 10)
1 FC= 10.76 Lux
Exceeded display range: Display of the highest
Digit "1" appears on the display
Accuracy: ± 3% rdg ± 0.5% f.s (± 5% rdg ± 10 dgt at >
20,000 Lux / 2,000 FC area).
Calibrated with a standard incandescent lamp at a colour temperature of 2856K
Repeatability: ± 2%.
Temperature Characteristic value: ± 1%/°C
Measuring rate: approximately 2.0 times/sec.
Photosensor: Silicon photo diode with filter

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Working temperature: 0°C to 40°C (32°F to 104°F)
Humidity at work: 0 to 70 RH
Storage temperature: -10°C to 50°C (14°F to 122°F)
Storage humidity: 0 to 80% RH
Power source: 1 x 9V block battery, 6F22
Lifetime with an alkaline battery (as a rule) 200h
Dimensions: 148mm x 70mm x 40mm
Photo sensor lead length: 1500mm (approx.)
Dimensions photo sensor: 100mm x 60mm x 28mm
weight: approx. 250g (5.8 oz)
Accessories: carrying case, operating instructions, battery
4 Function keys and part designation
1st LCD display: 3 ½ digits with maximum reading value until 1999.
2. on/off key: this key is used to switch the luxmeter on or off
3rd Data-PEAK key: Press this key to cancel the peak recording mode.
4th selection key: Press this key to change the selection of 200Lux/20FC;
2,000Lux/200FC; 20,000Lux/2,000FC; 200,000Lux/ 20,000FC (always repeating in a
circle).
5. data- hold key: this key is pressed to fix the current measured value. All further
measurements are stopped by the luxmeter. If the HOLD key is pressed again, this is
cancelled and the unit can take measurements again.
6. lux/FC unit key: Press this key to select between the Lux or Foodcandle (FC) unit.
7. photo sensor

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5 Influencing variables of spectral sensitivity
As for the photo sensor: the photodiode with filters used almost reaches the C.I.E.
(International Commission on Illumination) standard of spectral sensitivity test
characteristics. The photo-optical curve V ( ) is shown in the table below:
6 Steps to commissioning
1. on/off button: The on/off button is used to switch the light meter on/off.
2. selection of the Lux/FC scale: Press this key to select the desired light metering
unit.
The photo sensor cover must first be removed and the photo sensor is then held
against the light source in a horizontal position.
The nominal illuminance value can now be read off the LCD display.
5. measuring range exceeded: If the unit only shows a "1" on the display, the input
signal was too strong and a higher range must be selected.
6. data HOLD mode: The HOLD key is pressed to enter the HOLD mode. The
luxmeter stops all further measurements. If this key is pressed again, this command is
cancelled and the instrument returns to normal operation.
7. data PEAK mode: Press the PEAK key to select the peak mode. Once this selection
is made, all subsequent measurements are paused. If the PEAK key is pressed again,
the PEAK-HOLD mode is cancelled and the instrument returns to normal operation.
After all measurements have been completed, replace the protective cap of the photo
sensor and press the off button.
7 Check and replace batteries
As soon as an adequate power supply is not ensured, the symbol appears on the LCD
display and a battery change with a 9V block battery is necessary.
2. switch off the unit to do this. The battery cover is pressed down and at the same
time pushed down in the direction of the arrow to open the battery compartment.
3. the battery is removed from the housing and replaced by a new 9V block battery
4. replace the battery cover.
8 Maintenance

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The white protective cap on the photo sensor should be wiped with a damp cloth from
time to time.
2. the light meter must not be stored at too high a temperature or humidity.
The period of time required for a calibration of the photo sensor varies with the working
operations. In general, the light sensitivity decreases directly proportional to the
product of the light intensity of the working time.
To maintain the general accuracy of the instrument, periodic calibration is
recommended.
9 Examples of recommended illuminance levels
Office
Conference/reception room 200-750
Office work 700-1500
Masch. writing, technical drawing 1000-2000
School
Lecture hall, gymnasium 100-300
Classroom 200-750
Laboratory, library, drawing room 500-1500
Hospital
Hospital room, storage 100-200
Room for medical examinations 300-750
Operating room 750-1500
Emergency room 750-1500
Factory
Packing work, goods receipt 150-300
Work on the assembly line 300-750
Visual inspection work 750-1500
Assembly of electronic parts 1500-3000
Hotel
lounge, cloakroom 100-200
Reception, cashier 220-1000
retail shop
Entrance stairs range 150-200
Shop windows, packing tables 750-1500
Front part of the shop window 1500-3000

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Note:
When the protective cap is on the photosensor, the unit always displays "000";
if this is not the case, please operate the adjustable resistor on the back of the
housing.
Note:
To view the CE declaration, please click on the following link:
https://www.kern-sohn.com/shop/de/DOWNLOADS/