KROHNE H250 M40 ATEX II2D Ex t-II2G Ex d EN - Manual (Page 4)

2
DEVICE DESCRIPTION
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H250 M40
www.krohne.com 07/2012 - 4002069601 - MA H250/M40-Ex-II2GD-AD R01
Device description
2.1 Description of device
Variable area flowmeters measure and display the volume flow of flammable and non-
flammable gases and liquids. Depending on the device version, electrical limit switch contacts
with counter module, reed contacts, a 4...20 mA signal output with HART
® communication, a
Foundation Fieldbus interface or a Profibus PA interface can be installed in the display.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
1 Type series measuring unit H250
H250 - standard version, vertical upwards
H250H - horizontal orientation
H250U - vertical downwards
2 Measuring unit materials / versions
RR - Stainless Steel
C - PTFE or PTFE/ceramics
HC - Hastelloy C
Ti - Titanium
F - Food
3 Heating jacket version
blanc - without heating jacket
B - with heating jacket
4 Signal converter version
M40 - Aluminium housing, painted (standard)
M40S - Aluminium housing with added corrosion protection
M40R - Stainless steel housing
M40T - Stainless steel housing with added corrosion protection
5 High temperature version
blanc - without HT extension
HT - with HT extension
6 Electrical signal output
blanc - without transmitter
ESK - Electrical signal output 4...20mA (ESK4)
. . . - optionally available with counter, I/O module and display (ESK4-T) or
. . . - Foundation Fieldbus (ESK4-FF) or
. . . - Profibus PA (ESK4-PA)
7 Limit switches
blanc - without limit switches
K1 - One limit switch
K2 - Two limit switches
R1 - 1 reed switch
R2 - 2 reed switches
8 Version
Ex - Explosion-protected version
9 SIL Version
SE - SIL compliant electronic signal output
SK - SIL compliant limit switch
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