9
logger will permit the sound recording to be over-written the next time a no-leak to leak
transition occurs.
The situation of a logger requiring a “
no-
leak to leak transition” to initiate an automatic
recording would be problematic to a mobile logger, also known as a “lift
-and-
shift”
device, since these regularly change location. The logger has no way of knowing where it
is located, nor that it has been moved to a new site.
The problem is overcome by swiping the logger (to reset it) prior to each new
deployment. Resetting the logger also sets it to
always
make a new recording if the next
evaluation indicates a leak (irrespective of what the previous leak-state was).
If a logger is removed from one site, swiped to reset it (and activate the radio-link so
that its data can be downloaded), and then it is deployed to a new site … There will be
no issue if a leak was present at both the old and new sites; the automatic sound
recording is still made.
All sound recordings have a timestamp of when the recording was made built into the
file. It is possible for the user to download the sound file and determine when it was
made.
To enable the automatic sound record
ing feature, the loggers must have the “Record
automatically on new leak” control set.
2.12
L
OGGER
D
EVICE
-
S
CHEDULED
S
OUND
R
ECORDING
(PC
ORR
+
ONLY
)
The logger device can accept instructions to make a one-off sound recording of a site.
The measurement borrows the same memory as the logger uses for saving an
automatic sound recording.
Whilst a scheduled audio recording is pending, the regular logger activities (over-night
measurement) continue, but making any automatic recording is temporarily suspended.
Automatic recordings will resume 24 hours after the scheduled recording is finished.
This gives a time-limited protection of the scheduled sound recording to allow for it to
be collected (supported from s/w version 2.30).
Refer to your application guide to see if it supports using this feature of the logger.
2.13
L
OGGER
D
EVICE
-
M
ODEL
V
ARIATIONS
Several versions of the devices exist. They are similar appearance, but vary as follows:
•
P were originally yellow in colour, with red and green LEDs.
The label may have “P4”, next to the serial number.
The logger will have a P label on it.
•
PCorr+ is blue and has blue LEDs.
The label may have “P5”, next to the serial number.
The logger does not have a P label on it.
