Chapter II
5000-count portable digital multimeter, with current input
19
2. DESCRIPTION
This compact multimeter is a self-contained with an appropriate mechanical construction,
enables hand-held version, with a protective elastomer case. This casing is sealed. It is
designed for a high degree of user safety, maximum protection and unrivalled
performance.
2.1. Selector
switch
This multimeter is a standalone, hand-held professional measuring instrument, capable of
measuring the following quantities (accessed by the twelve-position rotary selector switch):
∗
AC voltages with AC (or RMS) capacitive coupling (Input impedance : 500
k
Ω
)
∗
AC voltages with AC+DC (or TRMS) direct coupling
∗
DC voltages
∗
DC / AC+DC voltages, range 500 mV
∗
AC currents with AC+DC (or TRMS) direct coupling
∗
DC currents
∗
resistance values
∗
continuity (with beeper)
∗
capacitance
∗
diode threshold voltage
∗
frequencies
2.2. Keypad
A four-key keypad lets you :
∗
select the autoranging mode (RANGE / AC+DC key)
∗
store a value (MEM key)
∗
activate the positive or negative peaks (Pk +/- key)
∗
select a function derived from the main function, or switch on the multimeter again
after it has been shut down automatically (RANGE / AC+DC key)
∗
activate back lighting of the display unit ( key)
∗
activate the RS232 link (Pk +/- and
keys + switch to OFF).
2.3. Display
This multimeter display provides :
∗
5 000-count measurements (50 000-count Hz-measurement),
∗
function indicator (V, A, AC+DC, F, Hz,
,
Ω
,
, AUTO, MEM,
) and
multiplicator (n, µ, m, k, M),
∗
battery discharged indicator BAT : approximately 12 hours of operation,
∗
clearly legible figures (11 mm high),
∗
an analogue readout of the parameter being measured through a 34-segment
bargraph,
∗
validation of the RS232 interface.
Display backlight when required in poor lighting conditions. Automatic switch-off.
2.4. Power
supply
This multimeter is powered by a standard 9
V battery (6LF22) which provides
approximately 500 hours of operation (on function V
DC
).
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 section 3.1.
