Chapter II
Portable digital multimeter
24
2. DESCRIPTION
This multimeter is one of the ASYC II (Advanced SafetY Concept, second generation) range,
designed for a high degree of user safety, maximum protection and unrivalled performance.
2.1. Selector switch
It is a standalone, handheld professional measuring instrument, capable of measuring the
following quantities (accessed by the nine-position rotary selector switch) :
∗ AC voltages with AC (or RMS) capacitive coupling
∗ AC voltages with AC+DC (or TRMS) direct coupling
∗ DC voltages
∗ AC currents with AC (or RMS) capacitive coupling
∗ AC currents with AC+DC (or TRMS) direct coupling
∗ DC currents
∗ resistance values
∗ continuity (with beeper)
∗ capacitance
∗ diode threshold voltage
∗ frequencies
∗ duty cycles
∗ pulse counting
∗ pulse width
∗ dBm
∗ resistive power
2.2. Keypad
An ten-key keypad lets you :
∗ select the autoranging mode (RANGE)
∗ store a value (HOLD)
∗ measure fast peaks (Pk +/-)
∗ set the measurement relative to a reference value (REL)
∗ select a function derived from the main function, or switch on the multimeter again after it
has been shut down automatically (SEL/ON)
∗ select time-domain measurements: frequency, duty cycle, stopwatch, pulse counter (Hz)
∗ activate sending data to a printer (PRINT)
∗ activate back lighting of the display unit
∗ activate the MIN- MAX- AVG detection mode (SURV)
∗ expand the bargraph scale (ZOOM)
2.3. Display
The display shows :
∗ clearly legible figures (14 mm high)
∗ an analogue readout of the parameter being measured through a 34-segment bargraph
∗ perform 50 000-point measurements (high resolution)
∗ perform 5 000-point measurements (low resolution)
Display back light when required in poor lighting condiitons. Automatic switch-off.
2.4. Power supply
It is powered by a standard 9 V battery which provides approximately 500 hours of operation.
2.5. Input terminals
Measurements are performed using two measuring leads supplied with the instrument connected
to input terminals 1, 2, 3 and 4, as indicated in § 3.1.
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