Handheld Digital Tesla Meter


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Product Details

1. General Description

The TD8620 Handheld Digital Teslameter is a field-portable unit that measures DC magnetic fields with direct digital readout in mT or G. The unit is designed for wide range, auto-range, high accuracy, and ease of use. 

TD8620 includes three grade meters:

                                         Accuracy of TD8620-1 is ±1% of reading

                                         Accuracy of TD8620-2 is ±2% of reading

                                         Accuracy of Td8620-5 is ±5% of reading

微信图片_20190213082440-2          


2. Technical Specification

2.1 TD8620-1

Range

200 mT

2000 mT

Scope

Maximum calibration field 2400 mT, 24 kiloguas

Resolution

10 μT

Accuracy

±1%

Displa

4 digit(in Decimal)

Power

Stud-snap Battery Operated, one section of 9 V battery

Operating environment

0~ 50

Storage temperature

-20~ 50

Dimensions

160 mm × 80 mm × 32 mm

Weight

260 g(include battery and cable)

Hall probe

Transverse probe , with 1 m cable


2.2 TD8620-2

Range

200 mT

2000 mT

Scope

Maximum calibration field 2.4 mT, 24 kiloguass

Resolution

10 μT

Accuracy

±2%

Displa

4 digit(in Decimal)

Power

Stud-snap Battery Operated, one section of 9 V battery

Operating environment

0~ 50

Storage temperature

-20~ 50

Dimensions

160 mm × 80 mm × 32 mm

Weight

260 g(include battery and cable)

Hall probe

Transverse probe , with 1 m cable


2.3 TD8620-5

Range

200 mT

2000 mT

Scope

Maximum calibration field 2400 mT, 24 kiloguass

Resolution

10 μT

Accuracy

0~1000 mT:  ±2% 

1000 mT ~ 2400 mT±5%

Displa

4 digit(in Decimal)

Power

Stud-snap Battery Operated, one section of 9 V battery

Operating environment

0~ 50

Storage temperature

-20~ 50

Dimensions

160 mm × 80 mm × 32 mm

Weight

260 g(include battery and cable)

Hall probe

Transverse probe , with 1 m cable


3. Demonstration


4. Features

1) The TD8620 is used for measuring magnetic flux density, rang 0~2400mT.

2) Three accuracy classes are optional: class 1, class 2, and class 5.

3) Users can switch the units G or mT by on the key.

4) Auto-zero, auto-range and maximum maintain functions.

5) Backlight adjusted, battery display, and auto power-off.

6) Light-weight, low power consumption, and multiple Hall probes are available.


5. Introducture

5.1 TD 8620 front panel key are defined as follows      Tesla meter 1 front panel

                                                                                            Fig.01

1) ON/OFF: Turns power to the unit on/off.

2) Hold: Turn Max Hold feature on and off. Max Hold captures and displays the highest field reading.

3) Backlight: Turn backlight feature on and off. Backlight lighten up the LCD for reading.

4) NULL: Used to zero or null effects of ambient low level fields from the probe.When user pushes the NULL key ,"0000.0 G or 000.00 mT"displayed. The unit then automatically accepts whatever residual field it reads as a zero offset .

5) mT/G : Changes units from mT to gauss .Gauss is used in the cgs system :1 G=0.1 mT,mT is used in the SI system :1 mT =10 G.


5.2 LCD Display

Tesla meter 2 interface

                                                                                                        Fig.02

5.3 Back Cover

微信图片_20190213082502-1Tesla meter 3 backcover

                                                                                   Fig.03

When the stud-snap battery is used up, you should take the follow steps to replace it. Firstly, use a long-stemmed driver to remove off the screw which on the hole shown in the Fig 03. Secondly, unfasten the snap of the battery, then take a new battery replace of the old ,fasten the snap , screw on. Finally replace the battery door.


5.4 Axial and Transverse Probes

TB8620 can use either axial or transverse probe shown in follows:

Tesla meter 4 probe

                                                                                     Fig.04

CAUTION :Care must be taken when handing the probe .The tip of the probe is very fragile. Pressure the Hall sensor can alter its calibration. Don’t apply more force than is required to hold probe in place. So there is no excessive pressure which will tend to bend or depress the sensor substrate and destroy the Hall element inside.


5.5 Connect the Hall Probe

Tesla meter 5 connectors

                                                                               Fig.05

Plug the probe into the male connector at the top of the teslameter. Make sure that the groove of female connector with the probe and bump of the male connector be matched shown in Fig 05 . However, it is most important that certain precautions be taken when handing and installing probes so that they are not damage or destroyed ,and to preserve their accurate calibration.


5.6 Probe Operation

For best results , the instrument and probe should warm up for at least 10 minutes before operation. When magnetic field forward vertical cross the Hall sensor ,the polarity is positive(N)see Fig 06,or is negative (S).

Tesla meter 6 positive

                                                                                   Fig.06 positive(N) measurement

Probe readings are dependent on the angle of the sensor in relation to the magnetic field. The magnetic field should Vertical cross the sensor. Maximum output occurs when the flux vector is perpendicular to the plane of the sensor. The greater the deviation from Vertical orientation ,the larger error of reading.

Tesla meter 7 effect of angle

                                                             Fig.07 Effect of Angle on Measurement


6. Application

image 1. Permanent magnet magnetic measurement

image 2. Mechanical parts remanence measurement 

image 3. DC magnetic field source measurement

image 4. Magnetic separator working magnetic field measurement

image 5. Speaker magnetic field measurement

image 6. Permanent magnet separator working magnetic field measurement

image 7. DC motor working magnetic field measurement

image 8. Strong magnetic shielding magnetic leakage measurement


7. Packing

No.

Name

Unit

Remark

1

TD8620 Tesla meter

1


2

Mercury-free alkaline dry battery

1

 9 V(prepared by customer)

3

Hall probe and test wire

1

Test wire is about 2m

4

Miniature screwdriver

1

cross

5

Operating instruction

1


6

Package box

1



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