Hioki 3144-20, Manual

Page: 54 / 118

Chapter 3 Setup and Measurement
50
Pressing the REC key on the monitoring screen
[MONI] for 1 sec. displays the recording screen
(REC lights), and the instrument starts recording
measurement data in memory at the preset interval.
Two recording modes are available. Either should
be set before recording.
• Automatic Stopping Mode
When memory becomes full (64,000 data items),
recording stops automatically.
When there are empty blocks in memory, record-
ing can be repeatedly started and stopped to
continue measurement.
❖
Memory Block: (page 17)
• Overwrite Recording Mode
When memory becomes full, older data is over-
written to continue measurement.
When data already exists before the start of
recording, the data must be deleted to start
recording.
❖
Data deletion: (page 53)
3.3 Recording Data [REC]
• To record data, use the 9445-02 or 9445-03 AC
ADAPTER. When the instrument is operated on
batteries, all data may not be saved since the
time of continuous use depends on the service
life of batteries in use.
• Due to the principles of measurement, the
detecting sensitivity of the 9741 varies with the
diameter of the cable to be measured, cable
position inside the clamp, permittivity of the
cable covering, and other factors. See the typi-
cal characteristics data for the relationship
between the diameter of cable being measured
and the sensitivity, and between the cable posi-
tion inside the clamp and the sensitivity (page
101). Especially when data must be recorded
for an extended period of time, fix the position of
the cable being measured inside the clamp.