Chapter II
Portable digital multimeter
21
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
10 A
5 mA
DC
, 50 mA
DC
, 500 mA
DC
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 peak value measurements (Pk +/-), or the data print out.
For user safety, automatic shutdown is also disabled when a measured
magnitude (voltage/current) present at the input exceeds dangerous level
(
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
•
remains backed up in non-volatile memory.
