Kimo LX 200 User manual

LX 200
Luxmeter

Table of contents
1 Introduction...........................................................................................................................................4
2 General information..............................................................................................................................4
2.1 Factor value according to the light sources..................................................................................6
2.2 Order of magnitude of Lux according to applications...................................................................6
3 Operating principle...............................................................................................................................
3.1 Keyboard presentation..................................................................................................................
4 Setting..................................................................................................................................................8
4.1 Brightness.....................................................................................................................................8
4.2 About.............................................................................................................................................8
5 During measurement............................................................................................................................9
5.1 Unique range................................................................................................................................9
5.2 Instantaneous illuminance............................................................................................................9
5.3 Relative illuminance......................................................................................................................9
5.4 Uniformity....................................................................................................................................10
5.5 Temporal......................................................................................................................................11
5.6 Mapping......................................................................................................................................12
5. Instrument shutdown...................................................................................................................15
6 After measurement.............................................................................................................................15
6.1 Data reading...............................................................................................................................15
6.2 Data transfer...............................................................................................................................16
6.3 Reseting memory........................................................................................................................16
Running informations.........................................................................................................................1
.1 Overange....................................................................................................................................1
.2 Power source..............................................................................................................................1
8 Maintenance.......................................................................................................................................1
8.1 Servicing.....................................................................................................................................1
8.2 Regular checking........................................................................................................................1
8.3 Batteries replacement – adaptors...............................................................................................1
9 Main specifications.............................................................................................................................18
9.1 Range details..............................................................................................................................18
9.2 Specifications..............................................................................................................................18
9.3 Standards....................................................................................................................................18
9.4 Measuring capacity and storage.................................................................................................19
10 Delivery and packaging....................................................................................................................19

1 Introduction
LX200 luxmeter is a photometer for measuring illuminance, it is equipped with a photoelectric detector and with a silicon
photodiode coupled with a filter to modify its response and to get it as closed as possible of the reference function V(λ)
defined in the CIE (International Commission on Illumination) LX200 is hand-held autonomous instrument fully automatic
designed for measuring illuminance With its memory, it allows the storage of datasets for processing on a computer
Results are displayed in Lux or in footcandle and allows 5 measurement modes:
Instantaneous illuminance:
Displaying of instantaneous values, maximum and minimum values
Relative illuminance:
Allows a relative measurement to a reference point to quantify a light input or an illuminance decrease
Uniformity:
Calculation of the min / ave ratio for determination of illuminance uniformity at workstation according to NF EN 12464-
standards - 1 – Lighting of workplaces (inside)
Evolution of illuminance according to weather conditions:
Storage of temporal evolution of illuminance for the follow up of environment conditions
Mapping of illuminance – Spatial representation:
Realisation and storage of cartography of light environments Coloured representation according to levels obtained for
printing of report (on a computer such as PC)
These different measurement modes are compatible with the following standards :
NF EN 12464-1 – Lighting of workplaces (inside)
NF EN 12464-2 – Lighting of workplaces (outside)
NF EN 12193 – Lighting of sports facilities
Its sensor is composed of a silicon photodiode which spectral response corresponds to the photopic curve according CIE
standard
Small, with its LCD graphic display of 64*128 pixels resolution, using a high-tech electronics, LX200 is a powerful
instrument and easy to use
2 General information
Photometrical data
Photometrical data are data that allow to define the action of electromagnetic radiation on visual function of the eye of an
observer
The average standard eye, adopted by the CIE (International Commission on Illumination), is defined by a function of
relative spectral illuminance efficiency for day vision or photopic
4 General information
Photopic curve of spectral sensitivity of the
human eye in day vision

Luminous flux
The luminous flux of a source is the evaluation, according to eye sensitivity, of the quantity of radiated light
among space by this source It is expressed in lumen (lm)
Luminous intensity
Luminous intensity is the luminous flux emitted by solid angle unit in a given direction
It is measured in candela, equivalent to 1 lm/sr
Luminance
Luminance of a source is the ratio between luminous intensity emitted in a direction and the apparent surface of the
luminous source in the considered direction Luminance is expressed in candelas by square meter (cd/m2)
Illuminace
Illuminance of a surface is the ratio of luminous flux received to the area of thise surface Its
unit is the lux, equivalent to 1 lm/m2 It is also expressed in footcandle (fc) according the ratio : 1 fc = 10 76 lux
Use :
For each application, you should check the measurement technique to get valid and consistent results The way of using the instrument has at least
as much importance on the result than the instrument quality
Main parameters shall be taken into account:
1 Put correctly the LX200 cell according to the appropriate and representative plan of the current study (ex: workstation)
2 Avoid non-representative illuminance of the studied area
3 Sensibly move away from the cell to avoid creating attenuation area of illuminance
“Pause” and “relative level” functions integrated in the LX200 will allow in most cases to avoid specific problems
General information 5

2 1 Factor value according to the light sources
The following table indicates the factor value corresponding to different light sources with their examples The device is adjusted with an
incandescent standard white light source owning its own spectral response The following lighting sources have a different spectral response
Therefore, the presented coefficients in the following table enable to correct the measurement according to these different sources
The correction is carried out by multiplying the measured value by the F factor : Corrected value = F x measured value
Sources F Factor Examples
Fluorescent tube with three bands 1 149
High pressure mercury lamp 1 201
Sodium vapour lamp 1 179
Metal halide lamp with three additives 1 076
Rare-earth metal halide lamp 0 911
White led : neutral colour 0 961
Halogen quartz lamp / tungsten (standard source) 1
2 2 Order of magnitude of Lux according to applications
Here are a few examples of order of magnitude according to different current situations
Environment Lux
Outside with open air 500 to 25000
Outside with direct sunlight 50000 to 100000
Full moon night 1
Overnight lit street 20 to 70
Apartment well lit 200 to 400
Factory : electronic assembling 1500 to 3000
Hotel reception hall 200 to 500
Shop 750 to 1500
Hospital operating room 750 to 1500
Classroom 200 to 750
6 General information

3 Operating principle
3 1 Keyboard presentation
When being switched on, “measurement screen” is displayed From this screen, to go to the 4 different measurement screens, press on key
and keys are associated to each measurement modes
key allows to access to reading setting or data transfer screens To back to measurement screen press key
Operating principle 7
Function keys
Directly associated to text displayed shown above on display, they allow measurement
setting
Key leaves current screen”
Screen key
From measurement screens, give access to other screens
On/Off key
123
54
6
Uniformity Temporal Mapping
Temporal
Mapping Uniformity Data transfer
Instantaneous Relative
1. Screens representing the 5 different measurement modes
2. Reading and data transfer screens
Instrument offers 3 groups of screens

4 Setting
Accessible from the principal measuring screen by successive pushes on the key, those different screens allow setting of the
instrument They also inform users
4 1 Brightness
To optimize display reading, the operator can :
1 Adjust brightness by pressing and function keys
2 Backlight LCD display for a better reading in a dark place
No” means backlight is switch off and “Yes” it is switch on
In this last case, battery life is reduced by about 15%
The role of calibration screen essentially consists on recall calibration conditions and more
particularly the percentage of modification of the gain compared with a nominal calibration
Calibration is reserved to the builder or to the partnership laboratory
4 2 About
Information on origin of manufacture, reference standards and dates of last and next audits
By pressing and keys, you can choose languages
Pressing or allows to choose measurement unit: Lux or Footcandle
Note : lux or fc unit is independent of the chosen language
8 Setting
About
Brightness Calibration
Brightness Calibration
+-
About -English About - French
French EnglishEnglish
fc
lux
3 – Setting screens

5 During measurement
5 1 Unique range
The digital processing of the instrument avoids for the operator the choice of a measuring
range, LX200 displays the result of the measurement in lux or fc on all of its dynamic To
cover the whole field, different formats and units are directly displayed
5 2 Instantaneous illuminance
Once switched, the instrument displays twice a second the instantaneous value of illuminance expressed in Lux or fc This value gives information
about illuminance local conditions
Max and min values are also displayed
The operator can at any time by pressing following keys:
 : reset max and min values
: activate pause function then
 : continue measurement
5 3 Relative illuminance
Principle :
To know the contribution on the measurement result by providing or deleting a luminous source, LX200 allows a relative measurement from an
existing situation
For example : Knowing the incidence of deletion or addition of lighting (neon tube) in a room
Proceed as follows:
From the start screen, here is how to proceed to make a measurement of relative illuminance :
1 x : access to measurement screen. The function is not launched yet
1x : Press Zr key Screen displays :
Down: instantaneous value of illuminance (here 598 9 lux) which will be the reference value
It stays memorised and fixed
Up: value of instantaneous fluctuating illuminance (here 1268 lux)
In the middle: In R panel, difference between the instantaneous value displayed at the top
and the reference value memorized at the bottom This value can be positive or negative
according to fluctuations of illuminance compared with the moment of memorization of the
reference value ( key )
During measurement 9
Lux mode Footcandle mode
Instantaneous
illuminance
Rel
Inst
Zr
Example 1
Example 2
Reference illuminance
Instantaneous fluctuating
illuminance
Relative illuminance
Reference illuminance
Instantaneous fluctuating
illuminance
Relative illuminance
Zr

5 4 Uniformity
Principle:
From sampled data, the instrument calculates and displays on the measurement time:
Instantaneous value at the rate of two displays per second
Average value
Max and min values
Uniformity of illuminance: définined as the min / average ratio
From start screen (a), here is how to proceed to calculate the uniformity on a time controled by chronometer and clock:
2 x access to measurement screen Uniformity (b) Measurement is not launched yet
1x : launching of the chronometer, it displays seconds -minutes-hours-days (max : 01D00H00M00) The first values, Average, max
and min are displayed, calculation of uniformity is in progress and changes according to illuminance conditions (c)
During the measurement, no other function is accessible
1x : stop the measurement, two possibilities for the operator (d) :
1- He wants to store in memory the results
2- He ignores the measurement and launch a new measurement or erase results already acquired
To store results, press key, a little progress bar visualizes the action (f)
To erase results and launch a new measurement : press key, a flashing pictogram indicates that the measurement made is not taken into
account and that a new launching is possible (e)
Press to back to the initial state
Press to erase results An erase bar indicates the progress The operator can launch a new measurement (g)
10 During measurement
2 x Inst
Start screen
Measurement
stop
Sto
Storing of results
Erasing of results
or
(a) (b) (c) (d)
(e) (f)
(g)
Inst
Sto