Sper Scientific 840024 User Manual

Digital Radiation

Meter

840024

Instruction Manual

Digital Radiation Meter 840024
Copyright ©2011 by Sper Scientific

ALL RIGHTS RESERVED

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 Scientific.

7720 E. Redfield Rd. Suite #7,

Scottsdale, AZ 85260

Tel: [phone] Fax: [phone]

Web: www.sperscientific.com

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TABLE OF CONTENTS

INTRODUCTION. . . . . . . . . . . . . . . . . . . .

CAUTION . . . . . . . . . . . . . . . . . . . . . . . . .

KEYPAD . . . . . . . . . . . . . . . . . . . . . . . . . .

OPERATING PROCEDURES . . . . . . . . .

METER SETUP . . . . . . . . . . . . . . . . . . . .

ESTABLISHING BACKGROUND

LEVELS . . . . . . . . . . . . . . . . . . . . . . . . . .

AREA MONITORING . . . . . . . . . . . . . . . .

CHECK SURFACE CONTAMINATION . .

CHECK AN OBJECT . . . . . . . . . . . . . . . .

MAINTENANCE AND CALIBRATION . . .

RADIATION AND RADIOACTIVITY . . . . .

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

WARRANTY . . . . . . . . . . . . . . . . . . . . . . .

NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . .

4

5

6

7

8

10

11

12

14

15

17

21

23

24

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INTRODUCTION

This manual provides the necessary
information for proper use and care of
Sper Scientific Model 840024 Radiation
Meter. We recommend reading this
manual completely prior to using the
instrument. It also contains valuable
information about the nature of ionizing
radiation that should be understood by
the user so that accurate measurements
can be made.

This Radiation Meter features selectable
measurement scales, adjustable audible
alarm and auto power off. It uses a thin
wall glass Geiger-Mueller (GM) tube that
will detect Beta and Gamma ionizing
radiation and X-rays. The GM tube
generates an electrical pulse each time
radiation passes through the tube.
These pulses are then electronically
detected and displayed in either SI units
(micro-sieverts per hour) or conventional
units (milliroentgens per hour).

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CAUTION

Although housed in a high-impact
case, the Geiger-Mueller tube that
senses radiation is fragile and may
break If the unit is dropped, exposed
to high temperature (above 122°F/50°
C) and/or high humidity (over 90%
RH).

x Do not allow surface of housing to

come in direct contact with
radioactive contamination

x Do not leave meter in

temperatures above 122°F (50°C)

x Do not expose to wet or high

humidity conditions

x Do not place meter in a microwave

oven

x Do not remove back cover
x Replace battery when is

displayed

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KEYPAD

1. 3.5 Digit LCD display

2. setup function button

3.

4.

5. (T1) and setup function up button

(T2) and setup function down button

Power ON / OFF button

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OPERATING

PROCEDURES

1. Press the button. The meter
performs a system check and
displays all indicators for
approximately two seconds together
with a Beep signal. When in use,
the instrument will emit a “chirping”
sound that increases in rate
according to the radiation intensity.

2. When powered on, the
measurement scale will default to

Micro-Sieverts per hour (T1).
Press the button to change
the measurement scale to
milliroentgens per hour (T2).

3. Hold the meter as shown on page
12 for detecting Beta radiation. Hold
the meter as shown on page 13 for
detecting gamma and x-ray
radiation.

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METER SETUP

1. To change the factory set alarm
level of 0.5 μSv/h press and release
the button. “ALA” appears in
the display followed by the alarm
set point. Press the Ÿ or ź arrows
to change the alarm point anywhere
in the range of 0 ~ 199.9 μSv/hr. It
is only necessary to set the alarm in
the range. The meter will
automatically select the
corresponding value for the
range. Once selection is made
press and release the button.

2. To change the 30 minute Auto
Power Off default press and release
the button until “APO”
appears in the display followed by
the current value in minutes. Press
the Ÿ or ź arrows to change the
Auto Off setting to anytime from 0 ~
60 minutes (selecting 0 will defeat

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