Sper scientific 840046 User manual

Microwave Meter
840046
Instruction Manual

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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 micro-
wave 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

MEASUREMENT PROCEDURES
1. Press POWER to turn the meter on.
2. Press FREQ. RANGE to select
microwave (2.45 GHZ) or RF (50
MHZ to 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 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.
MEASUREMENT PROCEDURES
Figure 1
Figure 2

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Note…
Due to background environmental
magnetic fields, this meter may display
a reading value under 0.002 mW/cm2
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
MEASUREMENT PROCEDURES

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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:
MEASUREMENT PROCEDURES

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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/cm2. This threshold value
cannot be changed.
MEASUREMENT PROCEDURES

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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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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.
MEASUREMENT PROCEDURES

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1. Because microwave ovens should
not be operated while empty, fill a
microwave safe container with 275
ml ofwater and place itinthe center
of the oven during testing.
2. Start the microwave at
maximum power.
3. Follow the measurement procedures
on page 8, concentrating
measurements ondoor seams,
window seals, welds and rivets.
MEASUREMENT PROCEDURES

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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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 840090 Water Resistant
Instrument Pouch
 840093 Field Tripod
 850000 Rubber Boot
OPTIONAL ACCESSORIES

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SPECIFICATIONS
Accuracy ± 2 dB at 2.45 GHZ
± 50 MHZ
Resolution 0.001 mW/cm2
Display 3 3/4 digits LCD;
maximum reading
3999 (4 mW/cm2)
RF Frequency 50 MHZ to 3.5GHZ
Axis Single
Sample Rate 2.5 times per second
Operating
Temperature &
Humidity
5°C to 40°C
˂80% RH
RF Power
Density
0.003 to 2.700
mW/cm2
Microwave
Frequency
2450 MHZ

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Storage
Temperature &
Humidity
-10°C to 60°C
˂70% RH
Operating
Altitude
≤2000 M
Operating
Environment
Indoor use;
pollution degree 2*
Battery 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 6 oz (170 g)
SPECIFICATIONS
*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.

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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 8/16/2017