Baker Hughes Panametrics HygroPro, User Manual

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1.4.2a Applicable standards and directives
When the HygroPro is installed in hazardous areas with
potentially explosive atmospheres, it complies with the ATEX
directive 2014/34/EU, the EU standards listed in Table 3 below,
and the North American FM/CSA and IEC standards listed in
Table 4 below.
Table 3: European Union (EU) standards
Title Number
General requirements IEC/EN 60079-0
Intrinsic safety “i” IEC/EN 60079-11
Group II, category 1G,
zone 0 equipment
IEC/EN 60079-14
Table 4: North American standards
Title Number
Electrical Equipment for Use in
Hazardous (Classified) Locations
General Requirements
Class
No. 3600
Intrinsically Safe Apparatus and
Associated Apparatus for use in
Class I, II, and III, Division 1, and
Class I, Zone 0 and 1 Hazardous
(Classified) Locations
Class
No. 3610
Electrical Equipment for
Measurement, Control and
Laboratory Use
Class
No. 3810
Intrinsically Safe and
Non-incendive Electrical for
Use in Hazardous Locations
CSA-C22.2
No. 60079-11
Safety Requirements for
Electrical Equipment for
Measurement, Control,
and Laboratory Use - Part 1:
General Requirements
(Adopted IEC 61010-1:2001, MOD)
(Tri-National standard, with
UL 61010-1 and ISA 82.02.01)
CSA-C22.2
No. 61010-1
Degrees of Protection Provided
by Enclosures (IP Code)
ANSI/IEC 60529
Degrees of Protection Provided
by Enclosures (IP Code)
CSA-C22.2
No. 60529
1.4.2b Compliance requirements
The HygroPro installation must comply with EN 60079-14
in Europe and with the National Electrical Code (ANSI/NFPA
70) or part one of the Canadian Electrical Code (C22.1), as
applicable, in North America. In other regions, additional
local codes may also apply.
1.4.2c Electrical connections
The HygroPro transmitter is certified intrinsically-safe
for use in zone 0. However, the external power must be
provided by one of the following methods:
• an isolated, intrinsically-safe, 24 VDC power supply
mounted in the safe area
• an isolated zener barrier mounted in the safe area
and installed between a standard 24 VDC power
supply and the HygroPro
Refer to "Figure 6" on page 8 for a typical hazardous
(classified) area HygroPro wiring diagram. This installation
uses an MTL706 zener barrier , in accordance with the
second option listed above.
If using serial communications with a PC, an isolated
RS232-RS485 converter mounted in the safe area between
the computer and HygroPro must be used. The converter is
typically powered by its own standard 24 VDC power supply.
WARNING!
Do NOT power an RS232-RS485 converter
from the same intrinsically-safe 24 VDC
power supply used to power the HygroPro.
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