HAL1002 datasheet(13/29 Pages) MICRONAS

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DATA SHEET

HAL 1002

Micronas

April 25, 2014; DSH000163_001EN

By pressing the key “calibrate and store”, the software

will

calculate

the

corresponding

parameters

for

Sensitivity, VOQ, Low-Level, High-Level and stores

these values in the EEPROM.

This calibration must be done individually for each

sensor.

The sensor is now calibrated for the customer

application.

However,

the

programming

can

changed again and again if necessary.

Fig. 3–1: Characteristics of a position switch

Step 3: Locking the Sensor

The last step is activating the LOCK function with the

“lock” key. The sensor is now locked and does not

respond to any programming or reading commands.

Warning: The LOCK register cannot be reset!

3.5. Example: Calibration of a Position Switch

The following description explains the calibration

procedure using a position switch as an example:

– The mechanical switching points are given.

– temperature coefficient of the magnet:

500 ppm/K

Step 1: Input of the registers which need not be

adjusted individually

The register values for the following registers are given

for all sensors in the application:

–FILTER

Select the filter frequency: 500 Hz

–RANGE

Select the magnetic field range: 30 mT

–TC

For this magnetic material: 6

–TCSQ

For this magnetic material: 14

Enter these values in the software and use the “write

and

store”

command

store

these

values

permanently in the registers.

Step 2: Calculation of the Sensor Parameters

Set the system to the calibration point where the

sensor output must be high and press “Readout BOFF”.

Set the system to the calibration point where the

sensor output must be low and press “Readout BON”.

Now, adjust the hysteresis to 80% and press the key

“calibrate and store”.

Step 3: Locking the Sensor

The last step is activating the LOCK function with the

“LOCK” command. The sensor is now locked and does

not

respond

any

programming

reading

commands. Please note that the LOCK function

becomes effective after power-down and power-up of

the Hall-IC.

Warning: The LOCK register cannot be reset!

Sensor

switched on

VOUT

position

Sensor

switched off

Calibration points

Sensor

switched on

Hysteresis

(here 80 %)

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