RS PRO 123-8776 User manual

Your purchase of this LIGHT METER marks a step forward for

you into the field of precision measurement. Although this

LIGHT METER is a complex and delicate instrument, its durable

structure developed. Please read the following instructions

carefully and always keep this manual within easy reach.

OPERATION MANUAL

User Manual

RS PRO LIGHT METER

Stock No: 123-8776

ENGLISH

4 light type, zero button, Max., Min.

TABLE OF CONTENTS

FEATURES...........................................................................................................................

SPECIFICATIONS.................................................................................................

2-1 General Specifications................................................................................

2-2 Electrical Specifications............................................................................................

FRONT PANEL DESCRIPTION..........................................................................................................................................................

3-1 Display........................................................................................................................................

3-2 Power Off/On Button...............................................................................

3-3 Data Hold Button...................................................................................................................

3-4 LUX/FC(Ft-cd) Button.....................................................................

3-5 LCD Contrast Adjust....................................................................................................

3-6 Memory "Record" Button...................................................................................................

3-7 Memory "CALL" Button..............................................................................................................................................................

3-8 Light Source Select Button.......................................................................................................

3-9 Zero Button......................................................................................................................................

3-10 % Button(Relativity).........................................................................

3-11 Range Switch...........................................................................................................................

3-12 Light Sensor.........................................................................................................................

3-13 Sensor Cover..................................................................................

3-14 Light Sensor Plug.................................................................................................................

3-15 Light Sensor Input Socket...............................................................................

3-16 RS-232 Output................................................................................................................

3-17 Battery Compartment/Cover.........................................................................................................

MEASURING PROCEDURE....................................................................................

ADDITIONAL FEATURES........................................................................................................

6. RS232 PC SERIAL INTERFACE.............................................................

7. BATTERY REPLACEMENT.........................................................................................................

1. FEATURES

* Microprocessor circuit ensure high accuracy, and also

and also provides special functions and features.

* Super large LCD display with contrast adjustment for

best viewing angle.

* Dual function display.

* Heavy duty & compact case.

* Records Maximum, Minimum and Average readings.

* Data hold.

* Auto power off saves battery life.

* Operates from 9V battery.

* RS 232 PC serial interface.

* Spectrum of photo sensor meets C.I.E..

* Wide range measurement both for LUX & Foot Candle

units.

* Relative % light measurement.

* User selectable lighting type (Tungsten, Fluorescent,

Daylight or Mercury).

* Zero adjustment by push button.

2. SPECIFICATIONS

2-1 General Specifications

Circuit Custom one-chip microprocessor LSI

circuit.

Display 13 mm(0.5") Super large LCD display with

contrast adjustment for best viewing angle.

Dual function display.

Lighting Type Daylight, Tungsten,

Selection Fluorescent, Mercury lamp.

Measurement LUX 0 - 50,000 LUX, 3 ranges.

& ranges Foot-candle 0 -5,000 Ft-cd, 3 ranges.

Relativity 0 to 1999 %.

(Relative to the range

selected and the measured

value)

Sensor The exclusive photo diode & color

correction filter, spectrum designed to meet

C. I. E.

Memory Records Maximum, Minimum and Average

Recall readings with RECALL facilities.

Sample Time Approx. 0.4 sec.

Zero Adj. By push button.

Power off Manual off by push button, or Auto shut off

after 10 minutes.

Data Output RS 232 PC serial interface.

Over Load "- - - -"

Indication

Operating 0 to 50 ℃(32 to 122 ℉).

Temperature

Operating Max. 80% RH.

Humidity

Power Supply 006P DC 9V battery(heavy duty)

or equivalent.

Power Current Approx. DC 5.3 mA.

Weight 335 g/0.77 LB (included batteries)

Size Main instrument:

180 x 72 x 32 mm(7.1 x 2.8 x1.3 inch).

Sensor probe:

85x55x12 mm(3.2x2.2x0.5 inch).

Accessories Instruction manual.

Sensor with protective cover.

2-2 Electrical Specifications (23 5

℃

)

Measurement Range Max. In-range

Display

2,000 Lux 0 - 1,999 Lux

LUX 20,000 Lux 1,800 - 19,990 Lux

50,000 Lux 18,000 - 50,000 Lux

200 Ft-cd 0 - 186.0 Ft-cd

Foot-candle 2,000 Ft-cd 167 - 1,860 Ft-cd

5,000 Ft-cd 1,670 - 5,000 Ft-cd

Range Resolution Accuracy

2,000 LUX 1 Lux

20,000 LUX 10 Lux

50,000 LUX 100 Lux ± ( 4 % + 2 dgt)

200 Ft-cd 0.1 Ft-cd

2,000 Ft-cd 1 Ft-cd

5,000 Ft-cd 10 Ft-cd

Note : Accuracy tested by a standard parallel light

tungsten lamp of 2856 K degree temperature.

Measurement Range Resolution

Relativity 0 to 1999 % 1 %

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Display 3-10 % Button (Relativity)

3-2 Power Off/On Button 3-11 Range Switch

3-3 Data Hold Button 3-12 Light Sensor

3-4 LUX/FC(Ft-cd) Button 3-13 Sensor Cover

3-5 LCD Contrast Adjust 3-14 Light Sensor Plug

3-6 Memory "Record" Button 3-15 Light Sensor Input Socket

3-7 Memory "Call" Button 3-16 RS-232 Output

3-8 Light Source Select Button 3-17 Battery Compartment/ Cover

3-9 Zero Button

4. MEASURING PROCEDURE

(1) Push the "Power Off/On Button"(3-2, Fig. 1) to

switch the instrument on.

(2) Zero Adjust Procedures

* Cover the Light Sensor(3-12, Fig, 1) using the Sensor

Cover provided (3-13, Fig. 1).

* Slide the "Range Switch"(3-11, Fig. 1) to the 2000

LUX position.

* Push the "Zero Button"(3-9, Fig. 1), then display will

show zero values.

* Upon completion, remove the sensor cover.

(2) Select the desired measuring unit by pressing the

"LUX/FC Button"(3-4, Fig. 1). The display will indicate

the selected unit of "LUX" or "Ft-cd".

(3) Determine the lighting type (Daylight, Tungsten,

Fluorescent or Mercury lamp) by pressing the

"Light Source Select Button"(3-8, Fig. 1)

* The LCD will indicate the selected lighting type using

the following symbols :

L = Tungsten, F = Fluorescent

S = Day Light, C = Mercury

(4) Select the max. range using the "Range Switch"(3-11,

Fig. 1).

* If the display shows "- - - - ", it indicates an

overload condition, select the next higher range.

* If the display shows "_ _ _ _ ", it indicates an

out-of-range, select the next lower range.

(5) Position the Light Sensor(3-12, Fig. 1) directly

under the light source.

(6) * On the 20000 LUX range, the last digit will be

shown on the lower line of LCD display.

* On the 50000 LUX range, the last two digits will

show on the lower line of LCD display.

* For example :

On the 20000 range, if the display show 1562 LUX

that means the real display is 15620 LUX.

* Please note the digits on the lower display are

multipliers only (i.e. x10 & x 100 respectively).

These digits will not change, and will only inducate 0.

(7) Data Hold :

* During measurement, pushing the "Data Hold

Button"(3-3, Fig. 1) will hold the display values &

the LCD will show the "D.H" symbol.

* To cancel the Data Hold function, Press the Data

Hold Button, once more.

(8) Relative % light measurement :

* During measurement, press the "% Button"(3-10,

Fig. 1). The current measured value will be indicated

as " 100 % ".

* All the subsequent measurements will be indicated

as a percentage, relative to the value when the

button was pressed.

The formula used is as shown below :

The new light values

The light values when the

" % " button was pressed

* To de-activated this feature, Press the "% Button"

(3-10, Fig. 1) again

(9) Data Record( Max., Min., Average reading)

* The DATA RECORD function displays the

maximum, minimum and average readings. To start

the DATA RECORD function, press the "Record

Button"(3-6, Fig. 1) once. "REC" marker will appear

on the LCD display.

*With the "REC" symbol indicated on the display

(a) Push the "CALL Button"(3-7, Fig. 1) once,

then the "Max" symbol with the maximum values

recorded will appear on the LCD display.

(b) Push the "CALL Button" once again, the "Min"

symbol with the minimum values recorded will

appear on the LCD display.

symbol with the average values will appear on

the LCD display.

(d) To de-activate the Data Record function, Press

the "Record Button" (3-6, Fig. 1) once again.

All associated anunciators will disappear from the

display.

(10) For quick measurement, follow the procedures

shown below :

Main procedures :

Determine Select

POWER ZERO * LUX or Ft-cd RANGE

ON * LIGHTING TYPE

Optional measuring procedures :

DATA HOLD MEMORY RECORD RS232 OUTPUT

Max., Min. AVG

Power management

AUTO POWER OFF or MANUAL POWER OFF

(Not activated under memory record function

during Memory

Record Selection)

5. ADDITIONAL FEATURES

(a) The instrument has built-in "Auto Power Shut-off"

in order to prolong battery life. The meter will switch

off automatically if none of the buttons are pressed

within 10 min.

To de-activate this feature, Select the memory record

function during measurement, by pressing the

"RECORD" button(3-6, fig.1).

(b) The instrument also features the ability to adjust the

contrast of the display.

This is achieved by controlling the "LCD Contrast

Adjust" pot (3-5, fig. 1).

6. RS232 PC INTERFACE

The instrument features an RS232 output via 3.5 mm

Terminal ( 3-13, Fig. 1).

The connector output is a 16 digit data stream which

can be utilized to the user's specific application.

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