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Gossen Metrawatt METRAport 40S Manual

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GMC-I Messtechnik GmbH 9
3.3 Quick Measurements
If you wish to perform quicker measurements than those possible with the auto-
matic measuring range selection function, make sure to establish the appropriate
measuring range:
•by manual measuring range selection, i. e. by selecting the measuring range
with the best resolution, see chapter 3.2.
or
•via DATA function, see chapter 5. After the first measurement, the proper
measuring range will be automatically determined so that measurements are
performed more rapidly from the second measured value onwards.
With both functions, the established measuring range is maintained for the sub-
sequent series mode measurments.
4Display (LCD)
4.1 Display Illumination
After the instrument has been switched on, background illumination can be acti-
vated by briefly pressing the DATA/MIN/MAX and MAN/AUTO keys simultane-
ously. Illumination is switched back off by once again pressing the same keys, or
automatically after approximately 1 minute.
4.2 Digital Display
The measured value appears at the digital display with decimal point and sign (+
or -). The selected unit of measure and the type of current are displayed as well.
A minus sign is displayed to the left of the value for the measurement of zero-
frequency quantities if the positive pole of the measured quantity is applied to the
jack.
If the measuring range upper limit is exceeded for the following measured
quantities, “OL” (overload) is displayed:
V (DC), I (DC), Hz, V~ (AC), I~ (AC), 30 mF: 30999 digits
30 nF
300 F: 3099 digits
The digital display is refreshed at different rates for the individual measured
quantities (see “Display Refresh Rates” on page 24.
4.3 Analog Display
The analog display with simulated pointer and dynamic response equivalent to
that of a moving-coil mechanism, is refreshed 20 times per second. This display
is especially advantageous for the observation of measured value fluctuations,
and during balancing.
The analog display is equipped with a polarity indicator. The scale is extended 5
segments into the negative range for the measurement of zero-frequency
quantities, allowing for precise observation of measured value fluctuation around
the zero point. If the measured value exceeds the display range, a triangle is first
display at the left, and polarity at the display is reversed approximately 0.7
seconds later. If the measuring range is exceeded (> 30999 digits, in the F range
(except 30 mF) : > 3099) a triangle is displayed at the right.
Scaling at the analog display is automatic, which is quite helpful for manual
measuring range selection.
… 9 …


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