Sper Scientific 840046 User Manual

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Microwave Meter

840046

Instruction Manual

Microwave Meter 840046
Copyright ©2009 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.

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TABLE OF CONTENTS

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

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

MATERIALS SUPPLIED. . . . . . . . .

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

MEASUREMENT PROCEDURES. .

BATTERY REPLACEMENT. . . . . . .

MAINTENANCE. . . . . . . . . . . . . . . .

OPTIONAL ACCESSORIES. . . . . .

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

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

4

5

6

7

8

16

16

17

18

20

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INTRODUCTION

Measure hazardous microwave
oven leakage

With use microwave oven door
seals may wear enabling hazardous
microwaves to leak out. Sper Scientific
Microwave Meter is calibrated at

2.45 GHZ, the precise frequency of
microwave ovens to accurately
measure the intensity of such micro­wave leakage. Features maximum
and minimum hold, an audible alarm,
and a zero adjustment to eliminate
background EMF. The display also
indicates overload and low battery.
Comes with a soft carrying case and
standard 9V battery, which provides
approximately 100 hours of use.

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FEATURES

 Frequency selection of normal

or microwave range

 Tripod mounting socket

 Maximum and minimum

 Hold function

 Auto-power-off

 Built-in alarm

 Zero offset adjustment

 Overload indicator

 Low battery indicator

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MATERIALS SUPPLIED

 Meter

 9 Volt Battery

 Instruction Manual

 Soft Carrying Case

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KEYPAD

1. Sensor position

2. LCD

3. Zero button

4. Power on/off

5. Maximum/minimum button

6. Frequency range selection button

7. Data hold button

8. Tripod mounting socket

9. Battery cover

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MEASUREMENT PROCEDURES

1. Press POWER to turn the meter on.

2. Press FREQ. RANGE to select

microwave (2.45 GHZ) or RF (50
MHZ~3.5 GHZ). When 2.45 GHZ
is selected, “2450 MHZ” will appear
on the lower right corner of the LCD.
When normal range is selected,
“2450 MHZ” will disappear from
the lower right corner of the display.

3. For general information on
microwave oven leakage and
instructions on preparing for
microwave measurement,
see page 14.

4. Position the top of the meter to
measure the electromagnetic waves.
Adjust the measurement angle or
position until the highest reading
is obtained.

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MEASUREMENT PROCEDURES

Measurement Position

Figure 1 shows the correct
measurement position of
RF electromagnetic field

strength.

Figure 2 shows the
incorrect measurement
positions of RF
electromagnetic field

strength.

Figure 1

Figure 2

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MEASUREMENT PROCEDURES

Note…

Due to background environmental
magnetic fields, this meter may display
a reading value under 0.002 mW/cm
prior to measuring.

Maximum, Minimum and Hold

1. Press MAX/MIN to retain the maxi-

mum value. “MAX” will appear on
the LCD. The meter will continue
measuring, holding the maximum
value on the LCD until exceeded.

2. Press MAX/MIN again to retain the

minimum value. “MIN” will appear
on the LCD. The meter will continue
measuring, holding the minimum
value on the LCD until exceeded.

3. Press MAX/MIN again to retain the

maximum and minimum values
simultaneously. “MAX MIN” will

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2

MEASUREMENT PROCEDURES

flash on the LCD. The meter will
continue measuring, holding the
maximum and minimum values
on the LCD until exceeded.

4. Press and hold MAX/MIN for more

than one second to exit and return
to Normal Mode.

5. Press HOLD to freeze the current

value on the display. “DH” (Data
Hold) will appear on the LCD.

Press HOLD again to release

the data hold.

Auto Power Off

1. To save battery life, the meter

will automatically turn off

after 30 minutes of inactivity.
To disable this function:

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MEASUREMENT PROCEDURES

2. Press POWER to turn the meter off.
Press and hold MAX/MIN while
simultaneously pressing POWER to
turn the meter on. Auto-power-off is

now disabled.

3. To restore auto-power-off: Press

POWER to turn the meter off and
then press POWER again to turn the
meter back on. will appear on the

LCD to indicate that auto-power-off
is enabled.

Alarm

The meter features a built-in alarm that
will sound when the measurement
exceeds 1 mW/cm2. The alarm will stop
sounding when the measurement falls
under 1 mW/cm

cannot be changed.

2

. This threshold value

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MEASUREMENT PROCEDURES

Zero Offset Adjustment

If the meter shows a measurement
other than 0 due to background EMF,
zero adjusting will eliminate this
electromagnetic interference.

Press ZERO to adjust and obtain a

0 measurement. “ZERO” will appear
on the LCD.

Overload Indicator

When the reading exceeds 4 mW/cm2,
“OL” will appear on the LCD to indicate
overload.

Low Battery Indicator

The symbol will appear on the

LCD to indicate a low battery. Replace
the battery (see page 16).

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MEASUREMENT PROCEDURES

Microwave Oven Leakage

With time, microwave leakage around
door seals, hinges and metal fittings
is not uncommon. Therefore, it is
important that all microwave ovens be
periodically checked to ensure that no
damage or malfunction has occurred.

Microwaves may easily pass through
porcelain, glass, ceramics and most
plastics. Highly potent microwave
energy generated by microwave ovens
is also capable of penetrating living
tissue to a depth of approximately

1.18” (30 mm).

Do NOT stand or look directly into
any area where microwave leakage
may be present.

Remove any rotating plates, etc.
before testing.

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MEASUREMENT PROCEDURES

1. Because microwave ovens should
not be operated while empty, fill a
microwave safe container with 275
ml of water and place it in the center
of the oven during testing.

2. Start the microwave at maximum
power.

3. Follow the measurement procedures
on page 8, concentrating
measurements on door seams,
window seals, welds and rivets.

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BATTERY REPLACEMENT

1. Press POWER to turn the meter off.

2. Remove the battery cover on the
back of the meter.

3. Remove the old battery and replace
with 1 new 9V battery, ensuring
correct polarity.

4. Replace the battery cover.

MAINTENANCE

Use a soft, dry cloth to clean the meter.
Do NOT use a wet cloth, solvents, water
or any liquid to clean the meter.

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OPTIONAL ACCESSORIES



840090 Water Resistant Instrument
Pouch

 840092 Bench-Top Tripod

 840093 Field Tripod

 850000 Rubber Boot

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SPECIFICATIONS

Accuracy

Resolution

Display

RF Power

Density

RF Frequency

Microwave
Frequency

Axis

Sample Rate

Operating

Temperature &

Humidity

± 2 dB at 2.45 GHZ

± 50 MHZ

0.001 mW/cm2

3 3/4 digits LCD;

maximum reading

3999 (4 mW/cm2)

0.003 ~ 2.700
mW/cm2

50 MHZ ~ 3.5 GHZ

2450 MHZ

Single

2.5 times per second

5°C ~ 40°C

˂80% RH

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SPECIFICATIONS

Storage

Temperature &

-10°C ~ 60°C
˂70% RH

Humidity

Operating

≤ 2000 M

Altitude

Operating

Environment

Battery

Indoor use;

pollution degree 2*

9V NEDA 1604, IEC

6F22 or JIS 006P

Battery Life

Approximately

100 hours

Dimensions

5 ¼” x 2 ¼” X 1 ¼”

(130 x 56 x 38 mm)

Weight

*Pollution degree is a classification of the amount
of dry pollution and condensation present in an
environment. This classification affects clearance
distances required for product safety. Office and
laboratory areas are considered pollution degree 2
environments.

6 oz (170 g)

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WARRANTY

Sper Scientific warrants this product against
defects in materials and workmanship for a

period of five (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
Scientific 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 void the warranty.

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

SPER SCIENTIFIC LTD

8281 E. Evans Rd., 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.sperscientific.com, or return your warranty
card within 10 days of purchase.

Revised 6/21/2013

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