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6. Operation
In the measuring modes relative measurement, minimal measurement and
maximal measurement the lower line shows the measuring mode in the left
and the reference value or minimal or maximal value with unit in the right.
If the Teslameter FM 302 runs on battery as power supply and if the battery
is nearly empty, instead of the unit, the empty battery symbol is shown in
lower right.
The update rate of the display is determined by the setting of the measuring
time. Each time the measuring time has passed a new measured value is
available and printed out at the display. To set the measuring time see
section 6.3.1.13 Key "time" – Measuring Time.
6.3.1.7 Key "zero" – Offset Compensation
The Teslameter FM 302 offers the possibility to compensate an offset of the
zero point. The compensation range is > ±
measuring range. With a measuring range
compensation range of > ±200 µT. With this function a deviation of the zero
point caused by temperature change of sensor and electronic can be
removed.
The possibility to compensate the offset is only available in the measuring
mode DC.
After pressing the key "zero" the device automatically performs the
compensation. The message "zeroing" is displayed and a number of dots
shows the progress of the compensation process.
If the offset is larger than the compensation range, the error message "offset
out of range" is displayed. The compensation is reset to zero.
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
Figure 10 Display supply by power adapter or USB
Figure 11 Display while offset compensation process
1
/
of the most sensitive
10
of 2 mT that means a
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