3M SE, DL user manual Preparing to measure, Sessions and Studies, Storing Data Explanations

59

Preparing to measure

Sessions and Studies

Preparing to measure

Sessions and Studies

Before you begin running a session/study, there are a couple items to consider:

•Understanding sessions and studies

•Adjusting the measurement range before running a study

•Calibrating the instrument

The following components explain how the data is stored on the instrument.

Storing Data	Explanations
Session	A session is comprised of one or more studies and uses data
	derived or accumulated from those studies to arrive at session
	results. The measurements in a session are the same ones
	made in each study in the session. For example, the maximum
	SPL determined for each study in a session is compared to the
	maximums for each other study in the session to determine the
	maximum SPL for the entire session. Likewise, an average or an
	accumulation for a study is continued using data from
	subsequent studies in the session to arrive at the corresponding
	average or accumulation for the entire session.
Studies	Studies are periods in a session during which measurements
	are acquired, processed and saved by the instrument. The
	duration of each study period is called the study’s run time.
Session and	You will be running a sound test in a machine shop. Your main
	objective is to determine the noise in three different work areas
Study Scenario
	of the plant which include two different machinist areas and a
	welding area. You set the SoundPro to run and pause three
	times at one-hour intervals. When the tests are completed, you
	upload the data into QSP-II. The tests will store as one
	“Session” under “Downloaded” node and each one-hour test is
	denoted as a “Study”.

Table 5-2: Sessions and studies explained

CAUTION: The memory card should not be inserted or removed during a study— you can lose data.

Models SE and DL