INSTRUCTION MANUAL

1. SAFETY WARNINGS

2. Features

This instruction manual contains warnings and safety rules which must beobserved by the user to ensure safe operation of the instrument and toretain it in safe condition.

●Wide Range 0.1〜199900 lux●MAX/MIN function●Automatic Zero Adjust function●Large LCD Display with Backlight# WARNING●Read through and understand instructions contained in this manual
before starting using the instrument.
●Save and keep the manual handy to enable quick reference whenevernecessary.

KEW 5204BT
Silicon photo diode0.0〜199,900 lx199.9/1,999/19,990/199,900 lx
0.1 lx±4%rdg±5dgt（23℃±2℃）
10° ±1.5%
Angle deviation from cosine 30° ±3%
60° ±10%characteristics
80° ±30%
Temperature characteristics ±5 % (at 23℃ reference and a range of 0 to 40℃)
Relative spectral sensitivity Deviation from spectral luminous
characteristics
efficiency:9% or lessAuto range:5s or less
Response time
Manual range:2s or lessCommunication
Bluetooth Ver.5.0
Auto power off
30 min.
Dimensions
169(L)x63(W)x37(D)mm
Weight210g approx..
Power source
R6(AA)(1.5V) x 2Operation Temperature/
0℃〜40℃,80%RH or less（withoutHumiditycondensation）
Storage Temperature/-10℃〜60℃,70%RH or less（withoutHumiditycondensation）
Continuous measuring time Approx. 80 hours
JIS C 1609-1:2006
Applicable Standards
IEC61326
Carrying case
Accessories
Instruction Manual
R6(AA)(1.5V)×２

5. Measurement

6. Bluetooth communication

5-1 Zero adjust
Please perform zero adjustment before measurement.
Press 0 ADJ button with the Lens Protecting Cover attached to the Light
Sensing Probe.
"CAP-" will auto-appear on the LCD display. After "CAL-" appears, themeter enters the automatic zero adjustment. When automatic zeroadjustment is completed, "CAL-" disappears and "0.0"appears. Afterconfirming the "0.0" display, remove the cap to start measuring.
If ERR1 appears, check the cap to make sure it is on properly.
After the measurement has been completed, press the power button
again to turn off the power, and cover the light-detecting surface withthe cap for protecting against stray light.

6-1 Bluetooth communication
KEW 5204BT has a Bluetooth communication function and can exchange
data with Android/ iOS tablet devices. Before starting to use this function,
download the special application KEW Smart＊ via the internet.
Some functions are available only while connected to the internet. For
further detail, please refer to 6-2. KEW Smart ＊.

6-2 KEW Smart ＊The special application KEW Smart＊ is available on download site forfree. (An Internet access is required.) Please note that communication
charge is incurred separately for downloading applications and using
special features of them. For your information, KEW Smart＊ is provided
on-line only.

5-2 Measurement
Place the light sensing probe parallel to the measuring object andmeasure it. At this time, please be careful that your own shadow does
not hit the sensing probe.
The light sensing probe can be fixed on the meter parallel orperpendicular to the LCD Display. Or it may be detached from the unit to
fit the measuring requirement.

Cautions:● Using the instrument or tablet devices near wireless LAN devices (IEEE802.11.b/g) may cause radio interferences, lowering of communication
speed, resulting in significant time lag in the display update rate
between the instrument and tablet device. In this case, keep theinstrument and the tablet device away from the wireless LAN devices,or turn off the wireless LAN devices, or shorten the distance between
the instrument and the tablet device.
● It may be difficult to establish communication connection if either the
instrument or tablet device is in a metal box. In such a case, change themeasurement location or remove the metal obstacle between theinstrument and the tablet device.
● If any leaking of data or information occurs while making acommunication using Bluetooth function, we assume no responsibility
for any released content.
● Some tablet devices, even if the application runs properly, may fail toestablish communication with the instrument. Please use another tablet
device and try to communicate with. If you still cannot confirm theconnection, there may be some problem with the instrument unit.
Please contact your local KYORITSU distributor.
● The Bluetooth word mark and logos are owned by Bluetooth SIG, Inc.
and we, KYORITSU, are licensed by them for use.
● Android, Google Play Store, and Google Map are the trademark orregistered trade mark of Google Inc.
● iOS is the trademark or registered trade mark of Cisco.
● Apple Store is the service mark of Apple Inc.
● In this manual, the TM and ® marks are omitted.

# DANGER ：is reserved for conditions and actions that are likely tocause serious or fatal injury.
# WARNING：is reserved for conditions and actions that can cause
serious or fatal injury.
# CAUTION ：is reserved for conditions and actions that can cause
minor injury or instrument damage.
# WARNING●Do not install substitute parts or make any modification to theinstrument. Return the instrument to Kyoritsu or your distributor for
repair or re-calibration.
# CAUTION●Do not expose the instrument to the direct sun, extreme temperatures
or dew fall.
●This instrument isn't dust & water proofed. Keep away from dust and water.
●Be sure to set the Function Selector Switch to the "OFF" position afteruse. When the instrument will not be used for a long period of time,
place it in storage after removing the batteries.
●Use a damp cloth and detergent for cleaning the instrument. Do not
use abrasives or solvents.
●The instrument should be calibrated once a year or so for the accurate
measurement

LIGHT METER SERIES#KEW 5204BT

DISTRIBUTOR

This symbol is marked where the user must refer to theinstruction manual so as not to cause personal injury orinstrument damage.
This instrument satisfies the marking requirement defined in theWEEE Directive. This symbol indicates separate collection forelectrical and electronic equipment.

Kyoritsu reserves the rights to change specifications or designs describedin this manual without notice and without obligations.

REF. LEVEL

03-20

92-2381

4. Specifications①Lens Protecting CoverThis is used to protect thephotocell from scratching andcreate complete darkenvironment for the meter toperform dark current
2calibration.
②Light Sensing Probe/Photocell③LCD Display
3④Power button
Push this button to turn on the5meter. Please push the button 4again to turn it off. The unit will 6
automatically turn itself off 7
af ter 30 minutes if no key
9operation. To disable the 8
automatic power off function,
turn the meter off, push andkeep holding button, then push power button to turn on.
⑤Backlight button
Push this button to turn on and off the LCD backlight. The backlight willbe automatically off after 30 seconds to save battery power.
⑥HOLD button
The user may hold the present and keep it on the LCD display bypressing the button.
⑦Max/Min button
Push this button to set the meter working under MAX/MIN mode. By
pushing this button, the user may swap the LCD reading among current,maximum and minimum reading. Push and hold this key for 3 seconds
to exit MAX/MIN mode.
⑧Range selector button.
The user may use this button to select the preferred measuring or
automatically selected by the meter. The available ranges are: AUTO
200, 2000, 20000, 200000 lx⑨０ ADJ button （Please refer to Measurement）

The symbol # indicated on the instrument means that the user must referto related parts of the manual for safe operation of the instrument. Be sure
to carefully read the instructions following each # symbol in this manual.

DIGITAL LIGHT METER

3. Name of Parts and Position/Operation⑩Battery cabinet cover
When battery capacity segment is lessthan one, the user should replace thebat ter y. The bat ter y cabinet can beopened with a screw driver and two AA
type batteries should be installed.

# WARNING
Radio waves at Bluetooth communication may affect the operations ofmedical electronic devices. Special care should be taken when using
Bluetooth connection in the areas where such devices are present.

MODELLight detector
Measuring Range
Range
Resolution
Accuracy

Features of KEW Smart＊:● Remote monitoring/ checking● Data save/ recall function● Map display
The GPS imfomation at the time of measurement is added to themeasurement data using the location information service.
● Comment editing
Measured result can be saved with comments.
The latest information about KEW Smart＊ can be checked with the siteon Google Play Store or App Store.