3
V1.4 March 15
It is VITAL that personnel responsible for the
installation and use of the NATM Cells READ and
UNDERSTAND the manual, prior to working with the
equipment.
1.1 General Description
The primary uses for NATM Cells are :
-
The measurement of stress in concrete
Particular features of
Geosense
®
Vibrating wire are:
-
Reliable long term performance.
Rugged; suitable for demanding environments.
High accuracy.
Insensitive to long cable lengths.
The Pressure sensor is based upon
‘
industry standard
’
Vibrating Wire technology.
When electronically excited, the sensor produces an output signal in the form of an
alternating current. The frequency of the alternating current can then be readily
converted to a fluid pressure by applying individual calibration factors.
Frequency signals are particularly suitable for the demanding environment of civil
engineering applications, since the signals are capable of long transmission distances
without degradation. They are also somewhat tolerant of damp wiring conditions and
resistant to interference from external electrical noise.
Geosense
®
NPC
-
3000 NATM Cells
are supplied in various configurations to suit
varying installation environments and techniques. Each cells is fitted with a length of
connecting cable, an internal temperature sensor and a surge arrestor.
1.0
INTRODUCTION
This manual is intended for all users of
Geosense
®
NPC
-
3000 NATM Cells
and provides
information on their installation, operation and maintenance
.