Chapter II
24
Portable digital multimeter
3. COMMISSIONING
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
Input terminal
V
AC
, mV
DC
, V
DC
,
Ω
,
,
°
C V
Ω
10 A
10 A
µA mA
µA / 500 mA
3.2.
Switching on the instrument
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
Automatic shutdown of the instrument is disabled in order to avoid interrupting
the surveillance mode (SURV), peak measurements (Pk +/-)
or a data print-out.
For user safety, automatic shutdown is also disabled when a measured
magnitude (Voltage/current) present at the input exceeds dangerous levels
(
indicator displayed).
3.4. Special
configurations
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 HOLD key. The selection is
reversed from the last configuration, is displayed for two seconds and remains backed up in
non-volatile memory.
- Choose the input impedance for measurements in the mV range :
Switch on with the rotary switch while holding down the RANGE key. The selection is
reversed from the last configuration, is displayed for two seconds, and remains backed up
in non-volatile memory.
- Choose a low resolution mode (5, 000 counts) :
Switch on with the rotary switch while holding down the REL key. The selection is displayed
for two seconds.
