User's Manual

The loggers
16
3.2 Design
All noise loggers have a highly sensitive microphone with a large dynamic range, a data
memory and a lithium battery inside. The standard loggers also have an internal radio
antenna.
The loggers have the following external characteristics:
Element Description
Hole (M5 thread)
For fitting the supplied ring, which can be used for carrying the logger and
pulling it out of the shaft.
Label with identification number (ID)
Each logger has its own six-digit identification number.
Type plate
The last six digits of the serial number (SN) on the type plate of the device
are identical to the ID.
Marking
Must always face upwards when the logger is fitted horizontally.
Magnetic foot
Can be unscrewed and replaced by an adapter, or similar, from the
assembly accessories.
The special TNC version of loggers have no internal antenna. Instead of the hole for the
assembly ring they have an antenna socket for connecting an external antenna.
Introduction
Standard version
TNC version
“Head” of the logger
“Foot” of the logger