ETS-Lindgren HI-1801 User manual
Model HI-1801
Microwave Survey Meter
User Manual
ii |
ETS-Lindgren L.P. reserves the right to make changes to any product described
herein in order to improve function, design, or for any other reason. Nothing
contained herein shall constitute ETS-Lindgren L.P. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren L.P. does not convey any license under its
patent rights or the rights of others.
© Copyright 1990–2016 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record | HI-1801 Microwave Survey Meter, MANUAL
Part #H-600041, Rev. C
Revision Description Date
Initial Release February, 1990
A Revised, Reformatted March, 1999
B Update branding: revised to meet
Style Guide specifications; PIB
included with release
October, 2012
C Update introduction, calibration
method, and electrical
specifications, and formatting.
April, 2016
| iii
Table of Contents
Notes, Cautions, and Warnings ................................................ v
1.0 Introduction .......................................................................... 7
Calibration Method ......................................................................................... 7
Standard Configuration .................................................................................. 8
Optional Items ................................................................................................ 8
ETS-Lindgren Product Information Bulletin ................................................... 8
2.0 Maintenance ......................................................................... 9
Maintenance Recommendations ................................................................... 9
Battery Replacement ............................................................................. 9
Spacer Cone Replacement.................................................................. 10
Annual Calibration ....................................................................................... 10
Replacement and Optional Parts ................................................................. 11
Service Procedures ..................................................................................... 11
3.0 Specifications ..................................................................... 13
Electrical Specifications ............................................................................... 13
Physical Specifications ................................................................................ 13
4.0 Operation ............................................................................ 15
Accuracy ...................................................................................................... 15
Preparing the Oven ...................................................................................... 17
Preparing the Meter ..................................................................................... 18
Check Feature ..................................................................................... 19
Making a Measurement ............................................................................... 19
What the Measurement Means .................................................................... 20
Appendix A: Warranty ............................................................. 21
Appendix B: EC Declaration of Conformity .......................... 23
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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.
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Introduction | 7
1.0 Introduction
The ETS-Lindgren Model HI-1801 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) 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.
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.
The HI-1801 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 5 mW/cm² and a standard temperature of 75º F.
The calibration is also checked at 1 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).
8 | Introduction
Standard Configuration
The Model HI-1801 Microwave Survey Meter includes:
Survey meter including probe with spacer cone
600 mL Beaker
Two 9 Volt Alkaline Batteries
Fitted carrying case
Optional Items
Spacer Cover Kit
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
Maintenance | 9
2.0 Maintenance
Before performing any maintenance, follow
the safety information in the ETS-Lindgren
Product Information Bulletin included with
your shipment.
WARRANTY
Maintenance of the HI-1801 Microwave
Survey Meter is limited to external
components such as cables or connectors.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
Maintenance Recommendations
The only maintenance that is required is the replacement of the batteries or the
spacer cone.
BATTERY REPLACEMENT
Always replace both batteries when batteries are in need of
replacement.
1. Move the selector switch to the OFF position.
10 | Maintenance
2. Remove the two screws that hold the instrument cover in place.
3. Remove the foam block that holds the batteries then remove the
batteries.
4. Replace the batteries and re-insert the foam block. Replace and
tighten the two screws that hold the instrument cover in place.
5. Make sure the LOW BATT indicator light is not on indicating the
batteries are fully charged.
SPACER CONE REPLACEMENT
Do not use the HI-1801 without the spacer cone in
position. To maintain stated instrument accuracy,
only use spacer cones provided by ETS-Lindgren.
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 cover on, being sure the cover is fully seated on the probe.
Annual Calibration
It is recommended that the Model HI-1801 Microwave Survey Meter be
recalibrated every 12 months. See the Product Information Bulletin included with
your shipment for information on ETS-Lindgren calibration services.
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