Tindun GM55 User Manual

Digital Gauss/Tesla Meter

GM55

User’s Manual

SHANGHAI TINDUN INDUSTRY CO.,LTD

Tel. [phone]

Fax: [phone]

Email: [e-mail]

http://www.testmeter.com.cn

The Gaussmeter GM55 is a new generation of the Gaussmeter GM-2.
It can be used to measure DC/AC magnetic field strength of permanent
magnet materials, motors, speakers, magnetic sensors/ transducer and
other machines and instruments etc. with high resolution.

1) Characteristics

- Wide measuring range and high resolution

- A low-cost measuring device, which is easy to operate, portable

and convenient to handle and store.

- Ideal for quick quality checks and comparative measurements,

with built-in polarity display.

2) Technical Data

Measuring ranges: 0~200mT and 0-2000mT
Basic accuracy: DC: ±2.0%, AC: ±5.0%
Resolution: DC x1: 0.00 ~ 200.00mT, 0.01mT

DC x10: 0.0 ~ 2000.0mT, 0.1mT
AC x1: 0.00 ~ 200.00mT, 0.01mT
AC x10: 0.0 ~ 2000.0mT, 0.1mT

Measuring magnetic field: DC/AC (static & dynamic 10Hz ~ 200Hz)
Functions: Peak hold, Max hold,

automatic range Gs/mT selection

N/S pole display for DC measurement
Automatic probe zero adjustment

Display: 4 ½ LCD

Display Unit: mT/Gs (1mT=10Gs)

Ambient temperature: +5°C ~ +50°C

Storage temperature: -20°C ~ +70°C

Relative humidity: 20% ~ 80%

Power supply: 1.5V AA 4pcs battery

Dimensions: 140mm x 64mm x 30mm

Weight: 300g

3) Accessories

1. +5V DC power supply connecting to 220V AC, 1pc

2. Tansevers Probe, 1pc

1 2

3. GMPT-5: transverse probe 1.5x 4 x 40mm, 1pc

4. Adapter,1pc

4) Special probes

GMPA-5: axial probe Ø6 x 40mm

5) Measuring Principle

The Gauss/Tesla meter works with a Hall Effect sensor/probe. There are
two kinds of Hall probes: transverse and axial probes, which are used for
different magnetization directions.

According to the Hall Effect, a voltage can be measured at right angle to
the current path when a conductor or semiconductor with current flowing
in one direction is introduced perpendicular to a magnetic field. The Hall
voltage can be calculated from:

V

H

=

kHIHB

Where: VH: Hall voltage in volts

B: the applied field in Gauss

kH: sensitivity of the element in volts/Gauss
I: bias working current in amperes

The initial use of this discovery was for the classification of chemical
samples. The development of indium arsenide semiconductor compounds
in the 1950's led to the first useful Hall Effect magnetic instruments. Hall
Effect sensors allowed the measurement of DC or static magnetic fields
with requiring motion of the sensor.

6) Measuring Method

The magnetic lines of the measured magnetic field should perpendicularly
pass through the Hall Effect element of the Hall probe.

The sensing plan of the Hall
sensor/probe should be
positioned perpendicular to the
magnetic field

Measurement of magnetic field
in a space or gap

Put the concave side, i.e. the side with a small circle mark of the probe on
the surface of the measured magnet or at the measuring point of a

Electric
Charge

Hall Effect and its Electrical Parameters

3

Vertica

4