User Manual

 Press  to display the graphic representation of the last event

of channel 1.

DATE: 09/15/15

TIME: 11:28:17AM

4.5. RECORDING DATA

The L452 can store up to 1024 recording sessions.

The size of a recording session depends on the storage period and on the duration of the record. This last is limited by the battery

life of the instrument.

The recorded sessions can be uploaded to a PC (see §5) to be saved, displayed, and analysed.

Before starting a recording, make sure that there is enough space in memory. If the memory is full (

) or nearly full ( ), you

must empty it (see §4.6) to be able to make new records.

You can also look at the number of recording sessions (see §3.6), the maximum being 1024, and the available memory size, the

maximum being 31.88 MB.

 From the Measurement data screen (see Figure 10), press .

RECORDING:

START

DURATION:

15 min

 Press .

Dene the sampling period, between 200ms and 1 minute.

The possible values are: 200ms, 400ms, 600ms, 800ms, 1 to

60 seconds, and 1 minute.

Then dene the storage period, between 200ms and

1 hour. The possible values are: 200ms, 400ms, 600ms,

800ms, 1 to 60 seconds, and 1 to 60 minutes.

SAMPLE PERIOD:

200 ms

STORAGE PERIOD:

01 s

The storage period must be longer than the sampling period. If you set the storage period to a smaller value than the sam-

pling period, the sampling period is automatically changed so as to be equal to the storage period.

For an event input, this screen is read-only. The sampling period is xed: 62.5ms.

The samples are averaged over the storage period, then recorded and displayed on the Min/Max screen (see Figure 11).

The shorter the sampling period, the more measurements the instrument must make and the shorter its life between charges.

The shorter the storage period, the more data the instrument must record: the averaged measurements, the minimum and

maximum values.

If the sampling and storage periods are different, the instrument must record ve times as much data. In that case, it is best to

choose a storage period at least ve times as long as the sampling period.