Temp; Limit - Magnet-physik FH 54 Operating Instructions Manual

Gauss- / Teslameter
Here µ is the magnetic field constant or permeability of the vacuum.
0
When the units for field measurement are changed, relative and limit setpoints are converted to
the new units with no interruption in operation.
The units T and A/m belong to the international unit system SI (Système international d'unités)
which is provided by law in many countries. The unit G belongs to the old CGS (Centimeter,
Gram, Second) unit system that is frequently used until today.

5.7 Temp.

The Temp. dialog allows to switch on or off the display of the probe temperature. Additionally
you can select between the display in °C and °F. The function is only available, if the probe
connected to the instrument contains a temperature sensor. As the probe is heated by the control
current, the probe temperature usually will be slightly higher than the ambient temperature.
The FH 54 is no temperature measuring instrument. Do not use the probes for temperature
measurement. Extreme temperatures and mechanical stress due to fast temperature changes can
alter the calibration or destroy the Hall sensor.

5.8 Limit

The Limit function gives an optical signal, if the measured value is inside or outside a user
defined range. Two limits can be set.
The displayed texts have the following meaning:
− Low:
the measured value is below the lower limit
− OK:
the measured value is between the upper and the lower limit
− High:
the measured value is above the upper limit
Pressing the Limit key calls up a small menu dialog. Selections can be made by the arrow keys
and Enter. Select On or Off to activate or deactivate the function.
Limit can be operated in two modes. These can be chosen by selecting the mode command
with the arrow keys and pressing Enter.
The first mode is +/-. In this mode the sign of the measured value is taken into account when
evaluating measured values with regard to the limits. In this way the magnets for example can
be sorted for their orientation.
The second mode abs. In this mode the sign of the measured value is not taken into account.
Only the absolute value is evaluated. In this way the magnets for example can be sorted for
their field strength, regardless of the orientation.
Before the Limit function can be used, the limit values must be defined. Therefore select Set.
The actual setting is displayed. The actual range is the range used last. If you want to enter a
limit value in another range, press the Range key until the desired range appears. Use the
numerical keypad to enter the desired high limit point. After you have entered the value press
Enter to confirm the input.
The menu changes to the low limit point. Use the numerical keypad to enter the desired low
limit point. As soon as you press the Enter key, the Limit function is activated.
BA - Nr.: 2000540EBA01
TH
S , 24 , 2019
EPTEMBER
FH 54
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