ETS-Lindgren HI-1501 User manual

Model HI-1501
Microwave Survey Meter
User Manual

ii |
ETS-Lindgren Inc. reserves the right to make changes to any products herein to
improve functioning or design. Although the information in this document has
been carefully reviewed and is believed to be reliable, ETS-Lindgren does not
assume any liability arising out of the application or use of any product or circuit
described herein; nor does it convey any license under its patent rights nor the
rights of others. All trademarks are the property of their respective owners.
© Copyright 1999–2016 by ETS-Lindgren Inc. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren Inc.
Trademarks used in this document: The ETS-Lindgren logo is a registered
trademark of ETS-Lindgren Inc.
Revision Record | HI-1501 Microwave Survey Meter, MANUAL
Part #H-600010, Rev. B
Revision Description Date
Initial Release February, 1990
A Revised, Reformatted March, 1999
B Update to current style standards,
updated product photos; corrected
PNs of optional parts, calibration
method, and specifications
May, 2016

| iii
Table of Contents
Notes, Cautions, and Warnings ............................................... iv
1.0 Introduction .......................................................................... 6
Calibration Method ......................................................................................... 7
Standard Configuration .................................................................................. 7
Optional Items ................................................................................................ 7
ETS-Lindgren Product Information Bulletin ................................................... 8
2.0 Maintenance ....................................................................... 10
Maintenance Recommendations ................................................................. 10
Spacer Cone Replacement.................................................................. 10
Battery Replacement ........................................................................... 11
Annual Calibration ....................................................................................... 12
Replacement and Optional Parts ................................................................. 12
Service Procedures ..................................................................................... 12
3.0 Specifications ..................................................................... 14
Electrical Specifications ............................................................................... 14
Physical Specifications ................................................................................ 14
4.0 Operation ............................................................................ 16
Accuracy ...................................................................................................... 16
Preparing the Oven ...................................................................................... 18
Preparing the Meter ..................................................................................... 19
Making a Measurement ............................................................................... 20
What the Measurement Means .................................................................... 21
Appendix A: Warranty ............................................................. 22
Appendix B: EC Declaration of Conformity .......................... 24

iv |
Notes, Cautions, and Warnings
Note: Denotes helpful information intended to provide tips for better
use of the product.
Caution: Denotes a hazard. Failure to follow instructions
could result in minor personal injury and/or property
damage. Included text gives proper procedures.
Warning: Denotes a hazard. Failure to follow instructions
could result in SEVERE personal injury and/or property
damage. Included text gives proper procedures.
Note: See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
Safety Information
Refer to Manual: When product is marked with this
symbol, see the instruction manual for additional
information. If the instruction manual has been misplaced,
download it from www.ets-lindgren.com, or contact
ETS-Lindgren Customer Service.
High Voltage: Indicates presence of hazardous voltage.
Unsafe practice could result in severe personal injury or
death.
High Voltage: Indicates presence of hazardous voltage.
Unsafe practice could result in severe personal injury or
death.

| v
Protective Earth Ground (Safety Ground): Indicates
protective earth terminal. You should provide
uninterruptible safety earth ground from the main power
source to the product input wiring terminals, power cord,
or supplied power cord set.
Laser Warning: Denotes a laser (class 1M) is part of the
operating system of the device.
Waste Electrical and Electronic Equipment (WEEE)
Directive: (European Union) At end of useful life, this
product should be deposited at an appropriate waste
disposal facility for recycling and disposal. Do not
dispose of with household waste.
Recyclable Products: This product includes rechargeable
batteries. At end of useful life, please recycle the used
batteries, or dispose of them safely and properly. Many
cities collect used batteries for recycling or disposal. You
may contact your local waste disposal agency for
information on battery recycling and disposal.

6 | Introduction
1.0 Introduction
The ETS-Lindgren Model HI-1501 Microwave Survey Meter is a rugged,
compact, portable instrument that is virtually immune to failure caused by
excessive fields or physical abuse. This instrument is acceptable to the US
Government Center for Devices and Radiological Health (FDA/CDRH) for
compliance testing of microwave ovens and to all major microwave oven
manufacturers for testing ovens in use and after repair.
Microwave leakage (electromagnetic fields) is detected by an array of eight hot
carrier diodes housed in the large end of the plastic probe. This antenna array
has the unique feature of being able to sum microwave electric fields of any
polarization in a plane perpendicular to the axis of the probe. The antenna lobe
(effective measuring area) is also very broad, making the instrument easy to use
when measuring leakage around an oven door. The spacer cone is designed to
provide 5 cm spacing from the tip of the probe to the center of the array.
Each detection probe and meter amplifier is calibrated as a unit and serves all
three ranges: 2, 10 and 100 mW/cm². Only the 2 and 10 mW/cm² ranges are
considered compliance ranges in terms of compliance with the DHHs/CDRH
standard for microwave survey instruments contained in CFR 1030.10.

Introduction | 7
The HI-1501 must be used with the spacer cone in place. Using the
instrument without the cone will result in reading errors and may
damage the unit.
Calibration Method
Each meter is calibrated by placing the probe in a CW (continuous wave)
2450 MHz electromagnetic field. The source feeds an anechoic chamber through
a section of waveguide terminating in a slot radiator. Calibration is performed at a
level of 1 mW/cm² and a standard temperature of 75º F.
The calibration is performed at 1 and 5 mW/cm². The accuracy of the field is
determined by comparing with an LCR (local calibration reference) which is
traceable to NIST (National Institute of Standards and Technology) through
FDA / CDRH (Food and Drug Administration / Center for Devices and
Radiological Health).
Standard Configuration
The Model HI-1501 Microwave Survey Meter includes:
 Survey meter including probe with spacer cone
 Two 9 Volt Alkaline Batteries
 Fitted carrying case
Optional Items
Additional items that may be included with the Model HI-1501 Microwave Survey
Meter include:
 Plastic 600 ml beaker (pn H-44600MLP)
 Spacer Cone Kit (pn H-540013) – Includes two spacer cones and four
cone shields
 Nine Volt Batteries (pn H-30MN1604) (Duracell MN1604 or equivalent)

8 | Introduction
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
 Warranty information
 Safety, regulatory, and other product marking information
 Steps to receive your shipment
 Steps to return a component for service
 ETS-Lindgren calibration service
 ETS-Lindgren contact information

Introduction | 9
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10 | Maintenance
2.0 Maintenance
Before performing any maintenance,
follow the safety information in the
ETS-Lindgren Product Information
Bulletin included with your shipment.
Maintenance of the Model HI-1501 is
limited to battery and spacer cone
replacement.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
Maintenance Recommendations
S PACER C ONE R EPLACEMENT
Do not use the HI-1501 without the space cone
in position.
To maintain stated instrument accuracy, only
use spacer cones provided by ETS-Lindgren.
WARRANTY

Maintenance | 11
The spacer cone must be replaced when worn or contaminated. A polystyrene
cone shield provides protection for the relatively soft material of the cone.
1. Remove the old cone by
pulling straight up and off
the end of the probe.
2. Slip a new cone on, being
sure the cone is fully
seated on the probe.
B ATTERY R EPLACEMENT
Always replace both batteries when batteries are in need of replacement.
1. Turn the selector switch to the OFF
position.
2. Unsnap the two side clips that hold
the cover in place.
3. Replace the batteries and re-insert
the meter assembly into the cover
being careful to not crimp the
battery wires between the front
panel and cover.
4. Turn the selector switch to BATT
TEST. If the meter does not
immediately indicate full scale,
check the condition of each battery
to make sure they are in good
condition or fully charged

12 | Maintenance
Annual Calibration
It is recommended that the Model HI-1501 Microwave Survey Meter be
recalibrated every 12 months. See the Product Information Bulletin included with
your shipment for information on ETS-Lindgren calibration services.
Replacement and Optional Parts
ETS-Lindgren may substitute a similar part or new part number with
the same functionality for another part/part number. Contact
ETS-Lindgren for questions about part numbers and ordering parts.
Following are the part numbers for ordering replacement or optional parts for the
Model HI-1501 Microwave Survey Meter:
Part Description Part Number
Spacer Cone and Shield Replacement Kit
(10 Cones and 20 Shields)
H-540013
600 mL Plastic Beaker H-44600MLP
Carrying Case H-51FPC6506B
Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.

Maintenance | 13
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14 | Specifications
3.0 Specifications
Electrical Specifications
Frequency 2450 MHz (±50 MHz)
Power Range 0.2-100 mW/cm²
Accuracy ±1 dB
Response Time Fast Mode: <1 second
Slow Mode: 2 – 3 seconds
(to 90% of Impulse Level)
Overload Capacity Continuous 2.0 W/cm²
Physical Specifications
Dimensions 5.3 x 6.8 x 4.13 cm
(2.09 x 2.68 x 4.13 in)
Probe Length 30.0 cm
(11.81 in)
Cable Length 1.2 m
(3.94 ft)
Shipping Weight 2.3 kg
(5 lbs)

Specifications | 15
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16 | Operation
4.0 Operation
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
Do not attempt to operate a microwave oven
with:
 Any object caught in the door
 A door that does not close properly
 A damaged door hinge, latch or
sealing surface
Do not use the HI-1501 without the spacer cone
in position.
The areas where leakage is likely to occur are around the door seal, the window,
and at ventilation louvers or vents. A damaged or improperly installed magnetron
mounting gasket may cause leakage in the control panel area of the oven.
Accuracy
The accuracy of the ETS-Lindgren Model HI-1501 Microwave Survey Meter is
within ± 1 dB (+25%, -20%) when used according to these instructions:
1. Always use a clean spacer cone. Accuracy will be affected by wear of
the cone and by dirt and metallic particles which may become
imbedded in the EPS (Expanded Polystyrene-Styrofoam).
2. If the instrument is to be used continuously for an extended period of
time, the condition of the batteries must be checked by rotating the
selector switch to the BATT Test position at least once every
15 minutes.

Operation | 17
3. The normal operating temperature ranges is between 60º and 90º F
(15.5º and 32.2º C). If used outside this range, an additional error will
be introduced. This error can be approximated as -0.14% per
Fahrenheit (F) degree. The negative temperature coefficient means
that the instrument reads high at lower temperatures and low at higher
temperatures.
4. The parameters which affect the accuracy of this instrument are listed
along with the error contribution of each in the following table:
Parameter Error (dB)
1 mW / cm²
Calibration-Precision-Accuracy +0.42, -0.16,
±0.09
Non-linearity and AM response ±0.09
Near Field vs. Far Field ±0.29
Receiving Pattern -0.11
Temperature Response ±0.17
Frequency Response* ±0.04
Polarization* 0.21
RFI* 0.04
Drift 0.02
Total +1.27 / -1.12
*Errors combined in RMS manner

18 | Operation
Preparing the Oven
Do not attempt to operate a microwave oven
with:
 Any object caught in the door.
 A door that does not close properly
 A damaged door, hinge, latch or
sealing surface.
1. Make sure the oven is clean and there is no buildup of dirt around the
door seal area.
2. Inspect the door and sealing surfaces, the hinge and latch for damage
or a loose fit.
3. Make sure the oven is set for full power.
4. In order to make an accurate leakage measurement you must use the
specified water load. Fill the beaker to a level of 275 mL with cool tap
water and place it in the center of the oven.
5. Set the oven timer for three minutes.
If the timer is set longer than three minutes, the
water may boil. If the water does boil, carefully
remove the beaker and pour out the water.
Once the beaker has cooled, refill with 275 mL
of cool tap water.

Operation | 19
Preparing the Meter
1. Remove the meter from the carrying case. Make sure the EPS
(Styrofoam) spacer cone is intact and firmly seated on the probe.
Check the cone for signs of wear or contamination. If the cone is
contaminated or worn, contact ETS-Lindgren Customer Service
Department for replacement.
2. Move the SLOW / FAST switch to the FAST position. Turn the selector
switch to the BATT TEST position. If the needle does not indicate
above the green BATT OK line, replace both batteries. See
Maintenance Section for more information.
3. Turn the selector switch to the PROBE TEST position. The needle
should indicate between the green OK and PROBE TEST lines.
4. Turn the selector switch to the desired scale (usually the 2 mW scale)
and let the meter stabilize for two minutes.
5. Adjust the indicator needle on the meter to read zero by turning the
ZERO ADJ knob. The probe must be shielded or removed from the
vicinity of any RF fields when the meter is being zeroed.
The probe must be in a zero microwave field with no RF
energy present for accurate zeroing.

20 | Operation
Making a Measurement
1. Turn the oven on and proceed with the leakage measurement.
2. Hold the probe by the red handle in one hand and hold the meter in the
other hand. Place the tip of the spacer cone against the oven surface,
with the probe handle perpendicular to the surface. While testing, hold
the meter away from the oven to minimize the possible RF pickup
directly from the oven to the meter case.
3. Move the probe slowly, about one inch per second, keeping the cone
tip in contact with the oven and the probe handle straight.
4. The areas where leakage is likely to occur are around the door seal,
the window and at ventilation louvers or vents. A damaged or
improperly installed magnetron mounting gasket may cause leakage in
the control panel area of the oven.
5. If the needle goes beyond the end of the scale (2 mW/cm²), turn the
selector switch to the 10 mW scale. Turn the oven off, re-zero the
meter and repeat the measurement.
6. Once you have checked all around the door edges, around and across
the window and at any louvers or vents, move the SLOW / FAST
switch to the SLOW position. Return to the spot where you noticed the
highest reading.