3B Scientific Magnetic Field Sensor ±2000 mT - Manual (Page 6)

2
4. Technical data
Measurement ranges: 200 mT, 2000 T
Configuration: Tangential
Sensor type: Linear Hall-effect sen-
sor
Position of Hall sensor: 135 mm,
with reference to the
front of the sensor box
casing
Tare range:
200 mT range: +/- 100 mT
2 T range: +/- 1 T
Non-linearity: Max. ±1,5 % of the
total measurement
range
Temperature dependence:
( ) ( )
⎥
⎦
⎤
⎢
⎣
⎡
⎟
⎠
⎞
⎜
⎝
⎛ −
⋅ − ⋅ =
300 00088 0 1 300
K
T
, K B T B
When used with a connector box
200 mT range: Conversion factor: 125
mT/V, 1.60 V at 200 mT
2 T range: Conversion factor: 1250
mT/V, 1.60 V at 2000 mT
5. Operation
Note:
• To avoid permanent damage to the Hall sensor
in the sensor probe tip, do not subject it to any
mechanical pressure!
• Do not bend the sensor probe tip!
• Hold the sensor box by hand in the magnetic
field to be measured, or use the clamping rod
to position it as required in the experimental
setup.
• Set the tangential orientation of the sensor
element as required and measure the magnetic
field.
• Insert the sensor probe vertically through the
positioning hole marked "MFS" on the top of
the basic Hall-effect apparatus till it comes to
rest. The centre of the active surface on the
sensor will then be within the uniform mag-
netic field of the electro-magnet and right next
to the semiconductor crystal.
• Read off the value of the magnetic flux density
from the 3B NETlog
TM display.
The sensor box is automatically detected by the 3B
NETlog
TM unit.
Any change in the measuring range is automati-
cally transmitted to the 3B NETlog
TM unit.
5.1 Zero calibration for the sensor box
• When a measuring range has been selected,
hold down the Tare button for about 1 s. Zero
calibration is carried out automatically.
The zero display follows on the 3B NETlog TM display
row corresponding to the selected sensor input.
• Under certain circumstances it may be neces-
sary to carry out zero calibration again be-
tween measurements.
• Zero calibration should not be carried out
inside the pole pieces of a transformer. The
poles may possess some remanence which
would need to be taken into account.
6. Experimental applications
Magnetic fields of permanent magnets and coils
Hysteresis of transformers
Remanence
Saturation effects in ferrite cores
7. Sample experiment
Experiment to measure magnetic flux density
involving the Hall effect in semiconductors
Equipment needed:
1 3B NETlog TM (115 V, 50/60 Hz) 1000539
U11300-115
1 Transformer with Rectifier (115 V, 50/60 Hz)
1003315
U33300-115
1 DC Power Supply 20 V, 5 A (115 V, 50/60 Hz)
1003311
U33020-115
or
1 3B NETlog
TM (230 V, 50/60 Hz) 1000540
U11300-230
1 Transformer with Rectifier (230 V, 50/60 Hz)
1003316
U33300-230
1 DC Power Supply 20 V, 5 A (230 V, 50/60 Hz)
1003312
U33020-230
1 Hall Effect Basic Apparatus 1009934
U8487000
1 P-Doped Ge on Circuit Board 1009810
U8487020
or
1 N-Doped Ge. on Circuit Board
1009760
U8487030
1 Magnetic Field Sensor ±2000 mT 1009941
U11359
1 U Core 1000979
U8497215