Chapter II
Portable digital multimeter
25
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
,
V
Ω
10 A
DC
A
µA mA
DC
µA 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.
1.3.
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+/-), the
pulse counting mode or a data printout.
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 points) :
Switch on with the rotary switch while holding down the REL key. The selection is
displayed for two seconds.
