Getting Started; Connecting The Test Leads; Switching On The Instrument; Switching Off The Instrument - Metrix MX 26 Notice De Fonctionnement

3.

GETTING STARTED

3.1.

Connecting the test leads

Connect the black lead to the COM socket (for all measurements). Depending on the
position of the selector switch, connect the red lead as follows:
Rotary selector switch position
V , V , V
LOW Z AC+DC DC
500 mA (500 mA
DC AC
10 A (10 A )
DC
AC+DC
RS232 lead :
Connect the RS232 optical interface (optional kit) to the top of the multimeter casing and
the DB9F plug to PC (COM port). Refer to § 5.
3.2.

Switching on the instrument

The selector switch is on the OFF position.
Turn the selector switch to the required function.
All segments of the display come on for a few seconds. The instrument is then ready for
measurements.
3.3.

Switching off the instrument

The instrument can be switched off manually by returning the selector switch to the OFF
position, or automatically after approximately half an hour if no key is pressed or the switch
is not operated.
Note For user safety, automatic shutdown is disabled when a measured
magnitude (voltage/current) present at the input exceeds dangerous level
( indicator displayed).
3.4.

Special configuration

To adapt the configuration of the instrument to the measurement environment, the user
can choose 50 Hz or 60 Hz rejection :
Switch on with the rotary switch while holding down the MEM key. The selection is
reversed from the last configuration, is displayed for two seconds and remains backed
up in non-volatile memory.
To initialise the RS232 communication, keep the Pk +/- and
pressed, then set the rotary switch to the selected position.
3.5.

Multimeter maintenance

3.5.1. Fuse self-test

This check can be carried out with the multimeter in use without opening up the casing.
- 0.63 A fuse (F1) : set the rotary switch to the
VΩ sockets. The display should read approx. 0.001 V. If the digital display indicates an
overflow « .OL ». The fuse is blown.
- 10 A fuse (F2) : set the rotary switch to the
sockets. The display should read approx. 0.001 V. If the digital display indicates an
overflow « .OL ». The fuse is blown.
20
, Ω,
, ADP (ADP ), Hz,
DC AC+DC
+ )
DC
position and short-circuit the 500 mA and
position and short-circuit the COM and VΩ
5000-count portable digital multimeter, with current inputs
Chapter II
Input terminal
V Ω
,
500 mA
10 A
keys simultaneously