KROHNE DWM 1000-2000 EN - Manual (Page 11)

DWM Technical Data
11
Power Supply and Output
Voltage
Power Consumption
Output
Functional Earth FE (Protective)
DWM 1000 Flow Switch DWM 2000 Flow Meter
Two Wire System Output Current 4 - 20 mA
48-240 , 50/60 Hz or 24 (20 to 30 )
48V (Terminals 1/2) Option: 12 (10 to 14 )
200mA max. 50 mA max. (at 24 and 20°C)
Break or make contact, switch selected Passive current output 4 - 20 mA
(for relay contact limits see (20 to 30 )
’Electrical Connection’). Max. load: 500 Ohms for 24
200 Ohms for 12
<10 Ohms <10 Ohms
Protective earthing obligatory in connection chamber
Full-Scale Range “v” Adjustable Reference velocity between
0.1 and 9.9 m/s (0.3 and 32.5 ft/s) Full scale 1, 2, 3, 4, 5, 6, 7or 8 m/s
(3.3, 6.6, 9.9, 13.1, 16.4, 19.6, 22.9 or
26.2 ft/s)
Time Constant choice of 5, 8 or 10 seconds 5 seconds fixed
Operating Data
Liquid
Electrical Conductivity
Operating Pressure
Process Temperature
Ambient Temperature
Largely homogeneous liquids, pastes and slurries, also with solids content
ò20 µs/cm (µmho/cm)
25 bar (360 psi)
- 25 to + 150° C (-13 to +302°F)
- 25 to + 60° C(-13 to +140°F)
Installation
Nominal Pipe Diameter (DN)
Connection Socket
Inlet / Outlet Run
All DNs ò 50 mm (2”)
Threaded G1A (R 1”)
10 x DN / 5 x DN
Protection Category IP 55, Equivalent to NEMA 4 IP55 or IP68
Local Display Flashing LED (DWM 1000 only)
Cable Entry M20 x 1.5
Power Terminals Max. wire diameter 1,5 mm 2 (16 AWG)
Error Limits
v > 1 m/s (3.3 ft/s)
v < 1 m/s (3.3 ft/s)
Reproducibility
SP = Switching Point
5% of SP
3 cm/s (1.2 inches/s) + 2% of SP
1% of Switching Point
MV = Measured Value
2% of MV
2 cm/s (0.79 inches/s)
+/- 1.5% of MV
Hysteresis 8% when decreasing velocity 8% when decreasing velocity
Interchangeability In the case of a breakdown we advise a complete replacement of the DWM unit in
order to preserve the accuracy of the results. A change in the electronic threshold
can induce errors of <10%
Ex Versions Coding (on side label) Ex n R II T6...T3 X Zone 2
(according to IEC 79-15)
Materials:
Probe
Electrode
Housing
Connection Socket
Cable Entry Gland
Gaskets
Housing Cover
Ceramic Seal
Connection Socket
CrNi - Stainless Steel 1.4435 (SS 316 L - AISI) + ceramic insulation (zirconium oxide)
Platinum
Diecast aluminium with epoxy finish
Stainless Steel 1.4435 (SS 316 L - AISI)
Nickel plated brass
Buna N
Viton
Klingerit (without asbestos)