DEVICE DESCRIPTION
2
13
DK37/M8 - H250/M8
www.krohne.com
11/2017 - 4002616802 - AD DK37 NEPSI Ex ia R02 en
The permitted ambient temperature range is indicated on the nameplate; depending on the
device version it is
T
amb
= -40...+65
°
C / -40...+149
°
F or T
amb
= -25...+65
°
C / -13...+149
°
F.
The minimum product temperature is -40
°
C / -40
°
F.
2.8 Electrical data
Built-in equipment for the variable area flowmeter may only be connected to separate
intrinsically safe circuits with the following maximum values:
Type
Electrical built-ins
Min. ambient temperature
H250/../M8EG
DK37/M8E/../..
Signal output 4...20 mA
-40
°
C / -40
°
F
H250/../M8MG
DK37/M8M/../..
SJ2-S1N
SC2-N0
-25
°
C / -13
°
F
H250/../M8MG
DK37/M8M/../..
I7S2002-N
SJ2-SN
-40
°
C / -40
°
F
Maximum values
Device version
U
i
[V]
I
i
[mA]
P
i
[mW]
C
i
[nF]
L
i
[
μ
H]
DK37/M8E/../.. or H250/../M8EG
30
120
1000
0
~ 0
DK37/M8M/../.. or H250/../M8MG
SC2-N0...
16
25
64
165
150
52
169
DK37/M8M/../.. or H250/../M8MG
SJ2-SN
16
25
64
45
100
52
169
DK37/M8M/../.. or H250/../M8MG
SJ2-S1N
16
25
64
75
100
52
169
DK37/M8M/../.. or H250/../M8MG
I7S2002-N
16
25
64
165
120
52
169
WARNING!
Also, when operating the variable area flowmeter outside of the hazardous area, the connection
must be made to an intrinsically safe circuit. When connecting to non-intrinsically safe circuits,
there is a risk of damage to the safety-defining components.
