METRIX MTX3290 [15/63] Description of the instruments continued

METRIX MTX3290 [15/63] Description of the instruments continued
Description of the instruments
6,000- and 60,000-count digital multimeters 15
Description of the instruments (continued)
Keypad
The keypad has the following function keys:
The keys are taken into account and applied when pressed. If the key press is
validated, the instrument beeps.
Two types of action are possible:
Short press press lasting <2 seconds, validated by a beep as
soon as the key press is detected.
Long press press lasting >2 seconds, validated by a beep as soon as
the key press is detected.
Function keys
Successive short presses
Long press
Activation/deactivation of storage of
the measurements and of the
quantities at a given time:
- Hold of the display without stopping
the acquisitions. The bargraph
continues to operate normally.
- Exit from the HOLD mode
In the MAX/MIN/AVG PEAK mode,
when the HOLD is active, the blinking
of the "MAX MIN AVG PEAK" symbol
indicates that acquisition continues as
a background task.
- Hold of the display after
stabilization of the
measurement (Auto
HOLD)
- Exit from the
Auto HOLD mode
Choice of coupling AC, DC, AC+DC:
- Access to various parameters
In dBm: change of impedance 50,
75, 90, 600 (MTX 3291 only)
In temperature: the main display
unit indicates the temperature in °C,
the other in °F
In the ∆REL mode, the key is used
to change from (present value
reference value) to
Present value reference value
Reference value
The value is displayed in %.
(MTX 3291 only)
Activation/deactivation of
auto power off (APO)
(MTX 3291 only)
Activation/deactivation of the low-pass
filter ≈ 300Hz:
The low-pass filter (4th order) makes
it possible to measure the RMS
voltage delivered by an MLI type
speed controller (for asynchronous
motor).
See curve, p. 49 and 60.
Activation/deactivation of
the key-press beep
MTX 3290
x100

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