F.W. Bell 7030, Инструкция по эксплуатации

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F.W. BELL Model 7030 Gauss/Tesla Meter Instruction Manual
Section 6 – Flux Density Measurement 6-21
CLASSIFIERS The classifier function allows a lower and upper limit of flux density to be
defined that can be quickly used to determine the status of a magnetic field.
The instrument will indicate visually whether the field is above, within, or
below these limits. The same information is presented in the form of general
purpose switch closures available at standard 15 pin “D” type female
connector. The connector is located at the rear of the instrument.
The pin assignments for the classifier connector (digital I/O) are indicated in
Section 2 – Specifications .
When the classifier function is enabled the word “
Class”
will be displayed.
If the measured field is below the pre-defined limits, the word “
Low”
will be
displayed next to the word “
Class”
. If the measured field is above the pre-
defined limits, the word “
High”
will be displayed next to the word “
Class”
.
If the field is within the pre-defined limits, the word “
Class”
will be displayed
by itself.
Configuring the Classifier Settings
Each channel has two flux density values that are set. One value sets the
upper limit and the other sets the lower limit. It does not matter which value
is chosen to be the upper or lower limit, the instrument will automatically
make this determination. For dc mode operation, polarity information needs
to be specified. With ac mode, only positive values may be set. The
instrument will retain dc polarity information when switching between ac and
dc modes.
To activate / de-activate the classifiers:
1) From the main menu, choose CLASSIFIER.
2) Position the “pointer” over the appropriate “checkbox” and press the
ENTER key.
To set the classifier values:
1) From the main menu, choose CLASSIFIER.
2) Position the “pointer” over the word “
Scale”
and press the ENTER
key to advance the scale of the classifier setting. As the ENTER key
is pressed, the decimal point and/or unit multiplier in the classifier
setting will advance.
3) For dc mode, position the “pointer” over the polarity indicator and
press the ENTER key to change the setting.
4) Position the “pointer” over each digit in the classifier setting and press
the ENTER key to advance the number.