DEVICE DESCRIPTION
2
13
DK37/M8 - H250/M8
www.krohne.com
05/2018 - 4005351602 - AD DK37/H250/M8 II2GD 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 Surface temperature for equipment category II 2 D
For use in areas with flammable dust it should be noted that the indicated maximum surface
temperature of T75 at an ambient temperature of +65
°
C / +149
°
F and a product temperature of
+75
°
C / +167
°
F is valid without a dust coating.
For higher product temperatures the maximum surface temperature is defined by the product.
2.9 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/../..
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
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.
