2
1 General
1.2
Purpose
The
EX-TEC HS 680
and the models
660
,
650
and
610
are hand-
held measuring devices which can be used for all gas pipeline
testing applications.
The devices are designed for professional industrial use and
require the necessary specialist knowledge for working in gas
pipelines. Sample applications are described in /3/.
All devices are fitted with infrared sensors for measuring hydro
-
carbons C
X
H
Y
and carbon dioxide CO
2
as standard. Models
680
and
660
also feature a gas-sensitive semiconductor.
Models
680
and
660
can be optionally fitted with a detector for
ethane analysis to help you safely distinguish between natural
gas and swamp gas.
All devices can also be individually fitted with electrochemical
sensors.
The infrared sensors operate on the principle of absorption via
infrared-active gases, and the electrochemical sensors operate
on the electrochemical cell principle. The gas-sensitive semi-
conductor reacts to changes in conductivity brought about by
reducible gases.
Note:
These operating instructions describe the
EX-TEC HS 680
with
all additional equipment (firmware version 2.XXX). All descrip
-
tions refer to the device as delivered (factory settings) and apply
to all device versions. The manufacturer reserves the right to
make changes.
