Hach-Lange SI792(x) E HACH GLI 3700 series SI792(x) T 7MA2200 and 8398 series User Manual - Manual (Page 109)

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Appendix D ATEX safety instructions
The following ATEX safety instructions pertain to the electrodeless
conductivity sensors, model 3700E-series, types 3708E2T, 3727E2T
and 3728E2T manufactured by Hach Company. These sensors are
described in the EC type-examination certificate TÜV 07 ATEX 553601
as part of the Transmitter si792x E.
The operating manual for the transmitter si792x E is expanded with the
operating manual Model 3700E-Series Electrodeless Conductivity
Sensors (doc number MAN-3700E) and with the ATEX safety
instructions. Both documents are shipped with the model 3700E
sensors.
For the safe usage, mounting and installation, commissioning,
maintenance and de-installation of the sensors, the information in the
operating manual Model 3700E-Series Electrodeless Conductivity
Sensors (doc number MAN-3700E) and the following information are to
be noted and followed as per Annex Il, 1.06 of the directive 94/9/EC.
1. The model 3700E sensors are intended to be used for measuring
and processing electrochemical parameters. For this purpose the
sensors are equipped with a circuit for the conductivity
measurement and with a circuit for the temperature measurement.
ONLY the types 3708E2T, 3727E2T and 3728E2T sensors are
intended to be used in areas endangered by explosive atmospheres
and for which equipment in group II, equipment category 1, gas, is
necessary.
2. ONLY the types 3708E2T, 3727E2T and 3728E2T sensors are only
allowed to be operated together with the Transmitter si792x E, see
EC type-examination certificate TÜV 07 ATEX 553601. Operation of
the sensors with the Transmitter si792x T is not allowed.
3. The types 3708E2T, 3727E2T and 3728E2T sensors are intended
for usage in specific environmental conditions. These and other
conditions are listed in the operating manuals Model 3700E-Series
Electrodeless Conductivity Sensors and the "ATEX Safety