ETS-Lindgren HI-1501 User manual

HI-1501
Microwave Survey Meter
User's Manual
Copyright ©1999 by Holaday Industries, Inc.
Manual #600010 3/99 $5.00

Revision Record
Manual #600010
HIn1501 Microwave Survey Meter
Revision Description Date
--- Release 2/90
ARevised, Reformatted 3/99

TABLE OF CONTENTS
1.0 INTRODUCTION ..................... 1
2.0 ABOUT THE HInn1501 ................. 3
Description ......................... 3
Unique Features ..................... 3
Accuracy .......................... 5
Calibration Method ................... 6
Maintenance ........................ 7
Battery Replacement .............. 7
Spacer Cone Replacement ........... 7
Recalibration Service .................. 8
Service Centers ..................... 8
Return Procedures .................... 8
3.0 HI-1501 SPECIFICATIONS ............. 11
4.0 ACCEPTANCE ..................... 13
Introduction ....................... 13
Unpacking and Acceptance ............ 13
5.0 GETTING READY ................... 15
Introduction ....................... 15
Preparing the Oven .................. 15
Preparing the Meter .................. 16
6.0 MAKING THE MEASUREMENT .......... 17
Introduction ....................... 17
7.0 WHAT THE MEASUREMENT MEANS ...... 19
Introduction ....................... 19

Limited Warranty
Holaday Industries, Inc. warrants each model HIn1501 to be free
from defects in material and workmanship for aperiod of one
year from the date of shipment to the purchaser. This warranty
extends to the original purchaser only, and does not apply to the
batteries or to any products or parts subject to misuse, neglect,
accident, unauthorized service or abnormal conditions of
operation.
In the event an instrument covered by this warranty fails,
Holaday Industries, Inc. will, without charge, repair and
recalibrate the instrument if returned to their factory within one
year of the original purchase—provided that Holaday Industries'
examination discloses, to its satisfaction, that the product is
defective. Holaday Industries, Inc. may, at its option, replace the
product in lieu of repair. If the defect was caused by misuse,
neglect, accident, unauthorized service or abnormal conditions of
operation, repairs will be billed at anominal cost. In such cases,
an estimate will be provided before work is started, if requested
by the purchaser.
For warranty service, contact Holaday Industries, Inc. Provide
the serial number of the instrument and complete details
regarding the failure mode. You will then be given either service
information or shipping instructions. Return the instrument to
the factory, transportation prepaid. Repairs will be made at the
factory and the instrument will be returned to you, transportation
prepaid. Holaday Industries, Inc., assumes no responsibility for
loss of, or damage to, products in transit.
Warning!
EXTREME CAUTION IS ADVISED WHEN WORKING IN
ENVIRONMENTS WHERE HIGH-INTENSITY ELECTROMAGNETIC
FIELDS MAY EXIST AND WHERE CONTACT WITH HIGH VOLTAGE
OR HIGH CURRENT CIRCUITS OR APPARATUS IS POSSIBLE.
ACCIDENTAL CONTACT WITH OBJECTS OR CIRCUITS OPERATING
AT HIGH VOLTAGES OR HIGH CURRENTS CAN BE LETHAL!
HOLADAY INDUSTRIES, INC. ASSUMES NO LIABILITY FOR ANY
DAMAGES OR PERSONAL INJURY WHICH MAY RESULT FROM

HIn1501 Manual Page — 1
1.0 INTRODUCTION
The HI-1501 Microwave Survey Meter is arugged,
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.
This easy to use meter, and the step-by-step instructions
in this manual will enable you to easily and accurately
measure leakage from your microwave oven.
This manual is divided into six sections:
1. About the HI-1501
2. Specifications
3. Acceptance
4. Getting Ready
5. Making the Measurement
6. What the Measurement Means

Page — 2 HIn1501 Manual
Figure 1
HI-1501 Microwave Survey Meter

HIn1501 Manual Page — 3
2.0 ABOUT THE HI-1501
Description
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 aplane 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 a5 cm spacing from
the tip of the probe to the center of the array.
Each detection probe and meter amplifier is calibrated as
aunit and serves all three ranges: 2, 10, and 100
mW/cm2.Only the 2 and 10 mW/cm2ranges are
considered compliance ranges in terms of compliance
with the DHHS/CDRH standard for microwave survey
instruments contained in CFR 1030.10.
NOTE:
The HI-1501 must not be used without the spacer cone
in place. Using the instrument without the cone will
result in reading errors and may damage the unit.

Page — 4 HIn1501 Manual
Figure 2
HI-1501 Front Panel

HIn1501 Manual Page — 5
Accuracy
The accuracy of this instrument is within ± 1 db
(+25%, -20%) when used according to these
instructions:
1. Always use a clean Holaday 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.
3. The normal operating temperature range is
between 60/and 90/F. If used outside this
range, an additional error will be introduced. This
error can be approximated as -0.14% per
Fahrenheit 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.

Page — 6 HIn1501 Manual
Parameter Error (dB)
1 mW/cm2
Calibration - Precision
- Accuracy +0.42, -0.16 ±0.09
Nonlinearity 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
Calibration Method
Each meter is calibrated by placing the probe in a CW
(continuous wave) 2450 MHZ electromagnetic field
generated by acrystal controlled solid state source. The
source feeds an anechoic chamber through a section of
waveguide terminating in aslot radiator. Calibration is
performed at alevel of 1 mW/cm2and astandard
temperature of 75/F.
The calibration is also checked at 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

HIn1501 Manual Page — 7
[formerly NBS]) through FDA/CDRH (Food and Drug
Administration /Center for Devicesand Radiological
Health).
Maintenance
The only maintenance that is required is the replacement
of the batteries or the spacer cone, should it become
damaged or worn. Both items may be purchased from
Holaday Industries, Inc.
NOTE:
Do not use the HI-1501 without the spacer in position.
To maintain stated instrument accuracy, use only spacer
cones provided by Holaday.
Battery Replacement
Turn the selector switch OFF. Unsnap the two clips
that hold the cover in place. Always replace both
batteries at the same time. Any nine (9) volt alkaline
(or the optional, rechargeable NiCad) battery may be
used. Replace batteries and reinsert the meter
assembly into the cover being careful to not crimp the
battery wires between the front panel and the cover.
After replacement, turn the selector switch to BATT
TEST. If the meter does not immediately indicate full
scale, check the condition of each battery to assure
that they are in good condition or fully charged.
Spacer Cone Replacement
The spacer cone must be replaced when worn or
contaminated. Simply remove the old cone by pulling
straight off the end of the probe. Slip a new cone on,
being sure the cone is fully seated on the probe. A
polystyrene cone shield is available which provides
protection for the relatively soft material of the cone.

Page — 8 HIn1501 Manual
The following spare parts and options are available from
Holaday:
1. Spacer Cone Kit (Holaday part number 540013)
(Includes two spacer cones and four cone shields)
2. Nine Volt Batteries (Holaday p/n 30MN1604)
(Duracell MN1604 or equivalent)
3. 600 mL Beaker (Holaday p/n 44600MLP)
4. Nine VoltNiCad Batteries (Holaday p/n 30TR78)
(SAFT CS9T or equivalent)
5. NiCad Battery Charger (Holaday p/n 30AC22)
(SAFT WC-4 or equivalent)
Recalibration Service
It is recommended that the HI-1501 be recalibrated every
12 months.
Holaday Industries, Inc. will recalibrate and repair any
damaged instrument for anominal charge. The
calibration fee will be quoted on request.
Service Centers
Holaday Industries, Inc. has established factory-
authorized repair and recalibration centers in the US and
the UK. If your microwave survey meter requires service
or recalibration, contact Holaday for the nearest center.
Return Procedures
To return a product, use the following procedure:
Step 1. Briefly describe the problem in writing. Give
details regarding observed symptom(s), and

HIn1501 Manual Page — 9
whether the problem is constant or intermittent.
If you have already talked to Holaday Customer
Service about the problem, provide the date(s),
the name of the service representative you
spoke with, and the nature of the conversation.
Include the serial number of the item.
Step 2. Package the probe carefully. Return the
product, using the original boxes and packing
materials, if possible to:
Holaday Industries Inc.
Attn. Service Department
14825 Martin Drive
Eden Prairie, MN USA 55344

Page — 10 HIn1501 Manual

HIn1501 Manual Page — 11
3.0 HInn1501 SPECIFICATIONS
Frequency: 2450 MHZ (± 50 MHZ)
Power Range: 0 -100 mW/cm2
Accuracy: ± 1 dB
Response Time: 2 - 3 seconds (SLOW)
< 1 second (FAST)
Overload Capacity: Continuous 2000 mW/cm2
Dimensions: 2.09 in. (5.3 cm) x 2.68 in. (6.8
cm) x 4.13 in. (10.5 cm)
Probe Length: 12.00 in. (30.5 cm)
Cable Length: 3.3 ft. (1.0 m)
Spacer: 1.97 in. (5 cm), EPS (Expanded
Polystyrene - Styrofoam)

Page — 12 HIn1501 Manual