NARDA ELT-400, Руководство по эксплуатации

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5 Operation and use ELT-400
5-10
5.3.4 Selecting the lower frequency range limit (LOW CUT)
The default measurement range setting is limited to 30 Hz to 400 kHz.
The lower frequency range limit can be extended down to 1 Hz or 10 Hz.
⇒
Press the LOW CUT key until the required value for the lower frequency
range limit is shown in the display.
Note: The 1 Hz and 10 Hz settings should only be selected when this is
necessary for the measurement application (Operating
modes: see page 5-1).
The effect of e.g. the earth’s magnetic field is clearly discernible
when the instrument is moved if one of these settings is made. A
tripod can be used to prevent these effects.
Note: The measurement display will fluctuate whenever the setting is
changed. This fluctuation depends on the selected lower
frequency range limit and may continue for several seconds,
particularly if 1 Hz or 10 Hz is selected. Wait until the display has
settled before starting measurements.
5.3.5 Selecting the measurement range (RANGE)
The measurement range can be switched between HIGH and LOW settings
depending on the measurement task. If small field strengths are to be
measured, the accuracy of the measurement can be improved by selecting
the LOW setting.
LOW: High measurement sensitivity with limited overload capacity.
HIGH: High overload capacity with limited measurement sensitivity.
⇒
Press the RANGE key until the required measurement range setting is
made.
The display shows HIGH when HIGH range is selected.
– or –
HIGH is no longer shown in the display when LOW range is selected.