Tenmars TM201, TM205, TM204, TM202 User Manual

TCN]V|/ARS

LUX / FC

LIGHT METER

TM-201

TM-202
TM-204

TM-205

(€

User's

manual

H82TM2010010

1.

DESCRIPTION

Measures

light from

visible

luminaries equipped

with

fluorescent,

metal halide,

high-pressure

sodium

and

incandescent

sources.

2. SAFETY

PRECAUTION

Take extreme

care

for

the following

conditions while

Do not operate

the

meter under

the

environment

with

explosive

gas (material),

combustible

gas

(material)

steam

or

filled

with dust.

ln order to

avoid

reading

incorrect data,

please

replace

the battery

immediately

when the

symbol

"ffi" uppeats on

the

LCD.

ln order

to avoid

the

damage

caused

by

contamination

or static

electricity,

do

not touch

the

circuit

board before

you

take any

adequate

action.

Operating

Environment:

lndoors

use.

This

insirument

has been

designed

for being

used

in an

environment

of

pollution

degree

2.

Operation

Altitude:

Up to

2000M.

Operating

Temperature &

Humidity:

-10C

-

50C,

0%- 80%RH.

Storage

Temperature

&

Humidity:

-10

C

-

50f

,

o"k- 70"kRH.

o

EMC:EN61

326(1 997)+41

(1

998)+A2(2001

)

3. PREFACE

The

flux of lighi received

in

a unit area of a certain side

being shone is

popularly

known as illumination. ln both

United

Kingdom

and

America its unit is known as

footcandles

light, but

in Europe it is known

as

meter

candlelight.

One foot-candles light is the illumination of light thai
falls

on one side that

lies in

a distance one

foot

away

from a one foot-candlelight and exactly intersecting the

light. lts

abbreviated

form is written

as

1 Fc=1 Lm/ft,

similarly, one-meter candlelight

is the illumination

of

light that falls on a side that lies

in

a distance one

meter

away from

a

one meter candlelight and exactly

intersects

the light.

lt is

also called

Lux i,e. the flux of

light being received in each sq.

meter is

called

the

illumination

of one

lumen.

As one foot

candle=10.764

Lux, thereiore,Nbr. of

foot

(meter)

candlelight

=

Nbr. of Lumen

Area(sq.

foot

or sq.

mete0

Nbr.

of

Lumen=Nbr.

of

foot

(or

meter)x area

Foot-candle/Lux conversion

1 foot-candle=10.764 lux

'1

lux=0.09290

foot-candles

(sq,

foot or sq. meter)

a

a

EN-1

EN-2