Sper scientific 840021 Manual de usuario

Light Meter (Foot Candles)

840021

2 3

Light Meter (Foot Candles) - 840021

Printed in the USA

The contents of this manual may not be reproduced or transmitted

in any form or by any means electronic, mechanical, or other

means that do not yet exist or may be developed, including

photocopying, recording, or any information storage and retrieval

system without the express permission from Sper Scientic.

INTRODUCTION .....................................3

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

MEASUREMENT PROCEDURES ........................4

ZERO ADJUSTMENT & CALIBRATION ...................5

BATTERY REPLACEMENT .............................5

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

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

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

TABLE OF CONTENTS

INTRODUCTION

Compact and portable, your new meter can be used to monitor

light levels or check the FC level of a particular light source.

The sensor’s exclusive photo diode and color correction lter

meets the C.I.E. photopic spectrum.

Sper Scientic light meters are cosine corrected for a quick and

accurate response. Large easily legible 4 digit LCD. The meter has

an external zero adjustment, data hold, low-battery indicator, and

a moisture resistant front panel.

Comes with soft carrying case, detachable light sensor,

photo-sensor cover, instructions and a 9-Volt battery.

PANEL DESCRIPTION

1. Sensor Input & Sensor Plug

2. Display

3. On Button

4. Off Button

5. Hold Button

6. 200 Range Button

7. 2000 Range Button

8. Tripod Screw (on back)

9. Stand (on back)

10. Battery Cover (on back)

11. Photo Sensor

12. Zero Setting Terminal

4 5

MEASUREMENT PROCEDURES

1. Insert the SENSOR plug into the SENSOR INPUT socket.

2. Turn the meter on using the ON button.

3. Remove the lens cap from the PHOTO SENSOR.

4. Press the 200 RANGE button for measurements of 0 ~ 199.9

FC, or select the 2000 RANGE button for measurements of

200 ~ 1999.9 FC. If you are uncertain about which range to use,

select the highest range.

5. Range Overload is indicated when “1” appears on the left side

of the display. If this occurs, switch to the highest range or

discontinue use.

6. Point the PHOTO SENSOR toward the source and read the

results on the display. Divide the meter reading by the factor of

.0929 to convert FC results to LUX.

7. 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.

8. Press the OFF 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

uctuations in the line voltage. Ambient temperature, drafts

and ventilation also affect the luminous ux 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 & CALIBRATION

IMPORTANT: During adjustment, be sure to use only the terminal

marked “ZERO.” The unmarked terminals are for professional

laboratory calibration only. Tampering with the unmarked terminals

will result in inaccurate readings and require professional

calibration of the meter.

1. With the sensor cover securely in place and the meter turned

on, the LCD display should indicate “000” or “00.0” depending

on the selected range.

2. A slight variation will not affect readings; however, if a precise

reading is required you may use the ZERO SETTING terminal

to reset the unit.

3. To make an adjustment, press the 200 RANGE button and

cover the PHOTO SENSOR.

4. Using a small screwdriver, turn the ZERO SETTING terminal

until “00.0” appears on the LCD.

5. To maintain accuracy, annual laboratory calibration

is recommended. For calibration service, contact

SPER SCIENTIFIC.

BATTERY REPLACEMENT

1. Replace the battery when the low battery icon is displayed.

2. In-spec measurements may be made for several hours after the

low battery indicator appears.

3. Remove the BATTERY COVER screw and slide the cover off.

4. Replace the battery with a fresh 9V battery (alkaline or heavy duty).

6 7

SPECIFICATIONS

Unit of

Measure Range Resolution Accuracy

Foot

Candle

200 Range = 0 ~ 199.9 0.1 ±5% + 4 digits

2000 Range = 200 ~ 1999 1

Electronic Specications (23 ± 5°C): Tested under the environment RF Field

Strength less than 3 V/M, and frequency less than the 30 MHz only.

Display Maximum reading 1999

Overload

Indicator “1” is displayed on the left of the LCD

Power Supply One 9V battery, current approx. DC 3mA

Operating

Environment 32 ~ 122°F (0 ~ 50°C), less than 80% RH

Dimensions 7¾" × 2¾" × 1¼" (197 × 70 × 32 mm)

Weight 10 oz (283 g)

100

120

SPER CEI

LIGHT SPECTRUM CHART

PB8

WARRANTY

Sper Scientic warrants this product against defects in materials

and workmanship for a period of ve (5) 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 Scientic product will be substituted if available.

This warranty does not cover probes, batteries, battery leakage, or

damage resulting from accident, tampering, misuse, or abuse of the

product. Opening the meter to expose its electronics will break the

waterproof seal and void the warranty.

To obtain warranty service, ship the unit postage prepaid to:

SPER SCIENTIFIC LTD.

8281 East Evans Road, Suite #103

Scottsdale, AZ 85260

The defective unit must be accompanied by a description of the

problem and your return address. Register your product online at

www.sperwarranty.com within 10 days of purchase.

05/2015

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