KROHNE M10 Converter H250-H 54 Ex II2G EN - Manual (Page 4)

Signal converter M10-EEx d – Supplementary instructions
11/2002
4
2 Safety-relevant type code
The safety-relevant type code is made up of the following elements:
(1)
H .... / .... / M10 - E Ex
1 2 3 4 5
1 : Model series : measuring section
H54 : measuring section, Series H54
H250 : measuring section, Series H250
H250C : measuring section, Series H250C
2 : Material of wetted parts
RR : stainless steel
HC : Hastelloy
Ti : titanium
PTFE : PTFE, ceramics
3 : Model series : indicator section
M10 : signal converter M10
4 : Territorial application of the approval
E: Europe (EC, CENELEC area of validity)
5 : Safety function
Ex: explosion-protected electrical equipment
(1) places for items not needed may be omitted from the type code
3 Main safety-relevant characteristics
The H..../..../M10-EEx variable-area flowmeter consists of a combination of signal converter and
measuring tube. The main characteristics of the explosion-protected version are described below.
3.1 Process products
Flammable products are allowed provided they are not present in potentially explosive form.
3.2 Category / Zone allocation
The H..../..../M10-EEx variable-area flowmeter is basically designed in Category 2 for use in
Zone 1.
3.3 Type of protection
The H..../. .../M10-EEx variable-area flowmeters bear the following marking: EEx d IIC T6
3.4 Special lock
The sealing covers of the electronics compartment are secured by a special lock. The locking
screw requires use of an Allen key (3 mm size).