Functional description
Benchtop multimeters, 6000 and 60000 points
11
Functional description (continued)
Keypad
The keypad has the following function keys:
MODE AC/DC
RANGE
MAX/MIN/PEAK
Δ
REL
HOLD
MLI bandwidth filter (
)
The keys are taken into account and applied when pressed. If the key press is
validated, the instrument beeps.
General rules
For the keys, 2 types of possible action are distinguished:
•
Short press
: key press lasting less than 2 seconds, validated by a beep
as soon as the key press is detected.
•
Long press
: key press lasting more than 2 seconds, validated by a beep as
soon as the key press is detected.
Choice of coupling,
AC
,
DC, AC+DC
, of the bargraph style, or of the secondary
function key of the keypad (yellow).
Manual selection of the measurement range. The range defines the maximum
measurement span the instrument can cover.
*
The Auto Range mode is activated as default.
Display of the MAX, MIN, PEAK+, or PEAK- mode:
•
MAX
and
MIN
display the highest and lowest value of the RMS
measurement.
•
PEAK+
displays the maximum peak instantaneous value of the
measurement.
•
PEAK-
displays the minimum peak instantaneous value of the
measurement.
Storage of the measurements and quantities at a given time.
Freezes the display without stopping acquisition. The bargraph continues to
operate normally.
The key is used to deactivate back-lighting of the instrument.
Display and storage of the reference value of the differential value in the unit of
the quantity measured.
This key is used to limit the bandwidth to
≈
300Hz.
Thanks to the low-pass filter (4th order), it is possible to measure the RMS
voltage delivered by an MLI type speed variator (for asynchronous motor).
See curves p. 29 and 37.
