Sper scientific 840020 Manuale utente

Light Meter with Bar Graph

840020

Instruction Manual

SPER

SCIENTIFIC LTD.

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TABLE OF CONTENTS

INTRODUCTION ................................................................................... 2

PANEL DESCRIPTION......................................................................... 3

MEASUREMENT PROCEDURES ........................................................ 3-4

ZERO ADJUSTMENT ........................................................................... 4

BATTERY REPLACEMENT ................................................................. 4

AUTOMATIC SHUT OFF ...................................................................... 4

CALIBRATION...................................................................................... 4

RS232 SERIAL INTERFACE................................................................ 5

SPECIFICATIONS ................................................................................ 6

LIGHT SPECTRUM CHART ................................................................. 7

OPTIONAL ACCESSORIES................................................................. 7

WARRANTY.......................................................................................... 8

INTRODUCTION

Features 5 ranges, high resolution, measures Foot Candles or Lux, fast

and accurate response, automatic shut off and a hold function. The

sensor is cosine and color corrected and hermetically sealed to ensure

long term stability. Comes ready to use with probe, battery, carrying case,

and instructions.

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PANEL DESCRIPTION

Factory calibration only

11 13

1. DISPLAY 6. RANGE Button 10. STAND

2. POWER Button 7. ZERO Button 11. BATTERY

3. HOLD Button 8. RS232 Output 12. PHOTO SENSOR

4. REC. MAX/MIN Button 9. SENSOR INPUT Socket 13. SENSOR Plug

5. LUX/FC Button

MEASUREMENT PROCEDURES

•Insert the SENSOR Plug into the SENSOR INPUT Socket and turn the

meter on pressing the POWER Button.

•Remove the lens cap from the PHOTO SENSOR.

•Select the desired unit of measure by pressing the LUX/FC Button.

•Select the maximum range by pressing the RANGE Button. If the out

of range indicator "- - - - " appears, select another range or discontinue

use. For the highest accuracy, select the range that offers the highest

resolution (most number of digits appearing after the decimal point).

•Point the PHOTO SENSOR toward the source and read the results on

the display.

•Push the HOLD Button to freeze the reading in the display. The word

"HOLD" appears on the LCD. Press the HOLD Button again to exit this

function.

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•To obtain peak readings, press the HOLD Button for 2 to 3 seconds.

The words “Peak HOLD” will appear on the LCD. To clear the peak

reading, press the HOLD Button once (the display will flash). To exit

this function, press the HOLD Button for at least 2 seconds.

•To record the maximum and minimum measurements, press the REC

MAX/MIN Button and “REC” appears on the LCD.

•Press the REC MAX/MIN. Button again and “REC Max” appears on the

LCD, along with the maximum measurement.

•Press the REC MAX/MIN Button again and “REC Min” appears on the

LCD, along with the minimum measurement.

•To exit this function, press the REC MAX/MIN Button for at least 2

seconds until the display reverts to the current reading.

•Press the POWER Button to turn the unit off.

Notes: Keep the lens cap on the PHOTO SENSOR at all times except

when actually taking a reading. Fluctuations in the reading are generally due

to shadows or fluctuations in the line voltage. Ambient temperature, drafts

and ventilation also affect the luminous flux output. Avoid range overload

and do not store in areas of high temperature and/or humidity. Remove the

battery for long-term storage.

ZERO ADJUSTMENT

With the sensor cover securely in place and the meter turned on, and select

a the 40.00 Lux range (digits appear on the LCD). Press the ZERO button

and the LCD should indicate “0.00”.

BATTERY REPLACEMENT

Replace the battery when the low battery icon is displayed in the

left corner of LCD. In-spec measurements may be made for

several hours after the low battery indicator appears. Remove

the battery compartment screw and slide the cover away from

the meter, remove the battery and replace with a 9V battery (alkaline or

heavy duty type). Replace the cover.

AUTOMATIC SHUT OFF

The instrument has an automatic shut off function in order to prolong battery

life. After approximately 10 minutes without activity (no buttons pushed), the

meter will automatically shut off. To disable this feature, press the REC

Button.

CALIBRATION

To maintain accuracy, annual calibration is recommended. For complete

details and current fees contact SPER SCIENTIFIC Ltd, 7720 East Redfield

Rd, Suite 7 ,Scottsdale, Arizona 85260, USA. Phone: (480) 948-4448,

web: www.sperscientific.com, email: service@sperscientific.com.

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The 16 digits data stream will be displayed in the following format:

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Each digit indicates the following status:

D0 End Word

D1 & D8 Display reading, D1 = LSD, D8 = MSD

E.g: If the display reading is 1234, then D8 to D1 is:

00001234

D9 Decimal Point (DP), position from right to the left

0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP

D10 0 = Positive 1 = Negative

D11 & D12 Annunciator for Display

Lux = 15, Ft-cd = 16

D13 The upper display data = 1, The lower display data = 2

D14 4

D15 Start Word

RS232 FORMAT: 9600, N, 8, 1

Meter (3.5 mm jack plug) PC (9W ‘D” Connector)

Center Pin.................................. Pin 4 Pin 2 2.2 K

Ground/shield ............................ Pin 2 Pin 5 resistor

RS232 PC SERIAL INTERFACE

The instrument features RS232 output via a 3.5 mm terminal. The signal

output is a 16-digit data stream that can be adapted to user-defined appli-

cations. A RS232 lead with the following connection is required to link the

instrument with the PC serial interface.

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SPECIFICATIONS

Display Large .19” x 1.5” (52mm x 38mm), 5 digit display

with bar graph indicator.

Measurement and

Ranges

5 Ranges: 40.00 Lux, 400.0 Lux, 4,000 Lux,

40,000 Lux, 400,000 Lux.

Unit of Measure Lux, Foot Candle (Ft-cd)

Overload Indicator "- - - -" is displayed on the left of the LCD

Sensor The exclusive photo diode and color correction

filter, spectrum meets C.I.E.

Cosine correction factor meets the standard.

Power Supply One 9V battery, current approx. DC 8mA

Operating Temperature 32 ~ 122°F (0 ~ 50°C)

Operating Humidity Less than 80% RH

Weight 9.9 oz (280g)

Dimensions Main Unit: 7.9 x 2.7 x 1.2" (200 x 68 x 30mm)

Sensor: 3.2 x 2.2 x 0.3" (82 x 55 x 7mm)

Sensor Lead: Extends to appx. 3½ft

Data Output RS232 serial data output.

Unit of

Measure

Range In-Range Display Res. Accuracy

Lux 40.00 0 ~ 40,000 0.01 ±(3% rdg + 0.5% F.S.)

400.0 36.6 ~ 400.0 0.1

4,000 360 ~ 4,000 1

40,000 3,600 ~ 40,000 10

400,000 10,000 ~ 400,000 100 <100,000 ± (3% rdg +

0.5% F.S.). >100,000

for reference only

Foot

Candle

4.000 0 ~ 3.720 0.00

±(3% rdg + 0.5% F.S.)

40.00 3.35 ~ 37.20 0.01

400.0 33.5 ~ 372.0 0.1

4,000 335 ~ 3,720 1

40,000 930 ~ 37,200 10 < 9,300 ± (3% rdg +

0.5% F.S.). >9,3000

for reference only

Accuracy tested by a standard parallel light, tungsten lamp of 2856°K.

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LIGHT SPECTRUM CHART

100

120

410

430

450

470

490

510

530

550

570

590

610

630

650

670

690

710

730

750

SPER CEI

OPTIONAL ACCESSORIES

840057 RS232 Cable

840090 Water Resistant Instrument Pouch

840092 Bench-Top Tripod

840093 Field Tripod

850080 Software

- 8 -

Rev. 12/19/03

WARRANTY: Sper Scientific warrants this product against defects in materials

and workmanship for a period of five years from the date of purchase, and agrees

to repair or replace any defective unit without charge. If your model has since

been discontinued, an equivalent Sper Scientific product will be substituted if

available. This warranty does not cover damage resulting from accident, misuse,

or abuse of the product. In order to obtain warranty service, ship the unit postage

prepaid to: SPER SCIENTIFIC LTD. 7720 E Redfield Rd, Suite 7, Scottsdale,

Arizona 85260, USA (480) 948-4448. The defective unit must be accompanied by

a description of the problem and your return address. Please be sure to return

your warranty registration card within ten (10) days of purchase.

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