Important - Garant 380865 1 Manual De Instrucciones

4. Adjusting the zero point (ZERO SET)
Regarding the operation to set up ZERO in the magnetic filed
If the ZERO/RESET switch is pressed with the probe placed in a magnetic field, the magnetic flux
density and the polarity at the time the switch is pressed are set as the reference (zero point).
Therefore, the following meas ured values and polarity deviate, thereby disabling correct measu-
rement. If this occurs, place the probe in a space with no magnetic field and press the ZERO/RESET
switch again.
5. Measurement
Remove the cap from the probe and gently apply the tip (CONT ACT SIDE) of the probe to a
place to measure. Read the polarity and measurement.

Important

When the probe is applied to work piece, be sure to apply the face indicated
"CONT.SIDE" to the work piece.
lf it is the opposite face, precise measuring is impossibe.
Measuring the maximum value
After its illumination, start measuring but only after pressing ZERO/RESET switch. When the
REAL/HOLD switch is pressed again, the meter is changed to the REAL mode and the HOLD
mark disappears.
Regarding re-setting operation when HOLD mode is on.
In case ZERO is not available in the display, though ZERO/RESET switch is pushed during measure-
ment under HOLD mode, please set TM-801 to REAL mode and place it in such a place where there
is no magnetic field. Then push ZERO/RESET switch and make the value in the display to ZERO.
AC magnetic field measurement
The frequencies supported by this equipment for AC magnetic field meas urement are from
u
40Hz to 500Hz. With other frequencies, a magnetic field density may be displayed, but the
accuracy of its value is not guaranteed.
In the DC magnetic field also, a value may be displayed in the AC magnetic field measuring
u
mode due to rapid changes in the magnetic flux or change in polarity. When this happens,
keep the probe stationary in the REAL mode for a while and check the displayed value.
If the displayed value is zero, it means that no AC magnetic field exists.
Caution!
An accurate numerical value might not be able to be measured if the work piece
is magnetized to N pole and S pole alternately and the magnetized pitch is less
than 2 mm.
Before starting measurement, place the probe in a space where no
magnetic field exists and make sure it is in the REAL mode. Then press
the ZERO/RESET switch. The display shows "0" .
For measuring the maximum value, the HOLD mode is recommendable as
it holds the polarity and the maximum value. Press the REAL/HOLD switch
and select the HOLD mode. The HOLD mark illuminates on the display.
www.hoff mann-group.com
DE
EN
FR
IT
ES
CS
PL
RU
ZH
25