EnviroMentor ML-1 User Instructions

Magnetic Field

Logger ML-1

user instructions

English

Postal address: EnviroMentorAB, Box 5124, SE-402 23 Göteborg, Sweden.

Address (visitors): Gamla Almedalsvägen 6, Göteborg. Tel: [phone]. Fax: [phone].

E-mail: [e-mail] Home page: http://www.enviromentor.se

EnviroMentor has both the measuring

instruments and the expertise

EnviroMentor AB is a young, skills-based company, yet is also one of the
oldest in its field. All of our measuring instruments have been developed
in extremely close cooperation with researchers at Chalmers Institute of
Technology in Göteborg. EnviroMentor AB is wholly owned by Radians
Innova AB, a company which in turn is owned by two of Sweden’s most
powerful financial institutions. This combination of excellent skills and
good financial resources provides us with the potential to carry on continual
product development, keeping pace with the latest discoveries made by
researchers. You can find out all about our current range of measuring
instruments for the electrical environment from EnviroMentor’s various
product sheets. Please do not hesitate to contact us if you would like further
information. You can also visit our home page:
http://www.enviromentor.se

Karlssons Språkservice AB, Gothenburg, Sweden [phone]

ML-1ML-1

2 © Enviromentor AB 1999 reg. 98-013-1/Eng

© Copyright Enviromentor AB 1998

The contents of this manual may not be copied or duplicated

without the permission of Enviromentor AB.

Contents

1 Introduction ................................ 3

2 Technical data............................. 5

CE assurance..............................................6

Traceability.................................................6

3 Use............................................. 7

3.1 Menu ..........................................................7

3.2 Setting the clock..........................................8

3.3 Direct measurement....................................8

3.4 Registering readings (Logging)...................9

3.5 Manual registration of the measurement

readings (15-point measurement) ............11

3.6 Transmitting measurement series

(Dumping)................................................12

3.7 Deleting the memory .................................13

3.8 Changing the batteries...............................13

4 Measurement examples ............14

4.1 Direct measurement of magnetic fields......14

4.2 Logging magnetic fields.............................15

4.3 Example of report form for measuring

magnetic fields..........................................16

5 How magnetic fields arise ......... 17

6 References to authorities and

organisations............................ 18

7 Report forms............................. 19

Report form A for measuring/registering

magnetic fields in a room..........................20

Report form for measuring magnetic fields

around an object .......................................22

Report form for measuring magnetic fields around an object

Magnetic field, 30 Hz–2 kHz Measuring equipmen: Magnetic Field Logger
Object: Model: ML-1
Address: Room:
Measured by: Date:
Meas. distance 30 cm 50 cm Comments
0°µT µT
90°µT µT
180°µT µT
270°µT µT

Background field µT µT

Notes

Report 98:7, Magnetic Field Logger © EnviroMentor AB, Gothenburg, Sweden

ML-1ML-1

© Enviromentor AB 1999 reg. 98-013-1/Eng 3

1 Introduction

Thank you for buying a Magnetic Field Logger
ML-1, from EnviroMentor AB.

The equipment comprises:

• ML-1, measuring instrument for triaxial
measurement of magnetic alternating fields
and registration of measurement series

• User instructions

• Leather case

• Calibration document

• Interface cable

• CE certificate

• Diskette containing software

ML-1 measures and registers the RMS value of the
magnetic alternating field in the X, Y and Z di­rections, irrespective of the direction in which
the instrument is pointing in relation to the magnetic
fields. The instrument stores series of measurements
at intervals of between 1 and 150 seconds, and can
store up to 8,192 readings. This means that you
could take series of readings lasting more than
two weeks without stopping. The measurement
process can be started and stopped at any time ­the instrument stores a measurement series for
every start and stop until the memory is full.

The series of measurements are transmitted to a
computer using the accompanying cable, which
is connected to the RS232 port. The analysis
program enables you to analyse and document
the series of measurements in a way that has
not previously been possible.

The instrument can also be used for direct measure­ment. The reading is displayed on the LCD and up­dated every second. During direct measurement, ML-1
sends out the readings every second via the RS232
port, for transmission to a computer that has com­munication software loaded.

Magnetic Field Logger ML-1
measuring instrument.

Report form for measuring magnetic fields around an object

Magnetic field, 30 Hz–2 kHz Measuring equipment: Magnetic Field Logger
Object: Model: ML-1
Address: Room:
Measured by: Date:

30 cm 50 cm Comments

0°µT µT
90°µT µT
180°µT µT
270°µT µT

Background field µT µT

Notes

Report 98:7, Magnetic Field Logger © EnviroMentor AB, Gothenburg, Sweden

ML-1ML-1

4 © Enviromentor AB 1999 reg. 98-013-1/Eng

You can use ML-1 whenever you want to meas­ure or document magnetic fields, such as from
electrical installations, power cables, VDUs,
computers and other electrical equipment in the
office, industrial and home environments. Note
however that some of these objects create mag­netic alternating fields that are outside the in­strument’s frequency area.

ML-1 retains all measurement readings, even if
the battery runs out or is removed.

The ML-1 contains a band-pass filter for the
measurement of magnetic fields with a frequen­cy of 50 Hz. The filter can be connected and
disconnected at any time, both for direct meas­urement and logging.

Report form B for measuring/registering magnetic fields in a room

Magnetic field, 30 Hz–2 kHz Measuring equipment: Magnetic Field Logger
Object: Model: ML-1
Address: Room:
Measured by: Date:

Direct measurement µT Registration µT

0 m 0.8 m 2 m Start Stop Int. (s) average Max

1
2
3
4
5
6
7
8

9
10
11
12

Notes

Report 98:6B, Magnetic Field Logger © EnviroMentor AB, Gothenburg, Sweden

Measure­ment point

Height above

floor