Description; Selector Switch; Keypad; Display - Metrix MX 23 Notice De Fonctionnement

Chapter II
2.

DESCRIPTION

2.1.

Selector switch

This multimeter is a standalone, hand-held professional measuring instrument,
capable of measuring the following quantities, accessed by the 12-position rotary
selector switch (10-position : MX 23) :
∗ AC voltage with AC (or TRMS) capacitive coupling (input impedance : 500kΩ)
∗ AC voltage with AC+DC (or TRMS) direct coupling
∗ DC voltage
∗ DC / AC+DC voltage, range 500 mV
∗ AC current with AC+DC (or TRMS) direct coupling (except MX 23)
∗ DC current (except MX 23)
∗ resistance value
∗ continuity (with beeper)
∗ capacitance
∗ diode threshold voltage
∗ frequency
2.2.

Keypad

A four-key (two-key : MX 23) keypad lets you :
∗ select the autoranging mode (RANGE / AC+DC key)
∗ store a value (MEM key)
∗ activate the MIN-MAX-AVG detection mode (MIN/MAX key) (except MX 23)
∗
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 (
2.3.

Display

This multimeter display provides :
∗ 5 000-count measurements (50 000-count Hz-measurement) selection
∗ function indicator (V, A, AC+DC, F, Hz,
AVG) 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.
∗ The «
» symbol displays when the multimeter is in standby mode (the
multimeter goes off after 30 minutes without any action on key).
∗ Display backlight when required in poor lighting conditions.
2.4.

Power supply

This multimeter is powered by a standard 9 V battery (6LF22) which provides
approximately 250 hours of operation (on function V
2.5.

Input terminals

Measurements are performed using two measuring leads supplied with the
instrument connected to input terminals 1, 2, 3 and 4 (3 and 4 : only MX24 and
MX 24B) as indicated in section 3.1 .
Portable digital multimeters
key) (except MX 23)
, Ω,
, AUTO, MEM, MIN, MAX,
).
DC
21