Instruction manual

120-00004 REV A 10/06/2011 4000 DIGITAL MANUAL PAGE 3
Introduction
Note: It is not necessary to calibrate the monitor when
received from the Interscan or an authorized distributor.
All Interscan monitors are calibrated at the factory prior to
shipment.
The Interscan 4000 Digital series operates on the principle of
pulling a sample (Sample draw) through a sensor. The
Electrochemical sensor is manufactured by Interscan.
Electrochemical means that it produces an electrical current
proportional to the level of gas passing through. The large size of
the Interscan sensors results in larger reactive surface area which
yields greater sensitivity.
Equipment Description
1.0 Front Panel
(fig. 1)