22
Operating instructions for KME flow meter for compressed air and gases
8 technical data
Measured values
Flow
Measurands
m
3
/h, m
3
/min, l/min, l/s, kg/h, kg/min, m/s, SCFM, ft/min, °C, °F
Standard conditions (factory setting)
1013.25 mbar
(14.7 psi)
, 0 °C
(32 °F)
(configurable)
Measuring range
in air
DN15: 0.2...76.3 Nm
3
/h
(0.12...44.88 SCFM)
DN20:
0.4...135.6
Nm
3
/h
(0.24...79.77 SCFM)
DN25:
0.6...212
Nm
3
/h
(0.36...124.71 SCFM)
DN32: 0,9...347,4 Nm
3
/h
(0.52...202.06 SCFM)
DN40:
1,4...542,8
Nm
3
/h
(0.81...315.71 SCFM)
DN50:
2,2...848,2
Nm
3
/h
(1.22...493.35 SCFM)
Accuracy
1)
in air
at 7 bar (102 psi) (abs) and 23 °C (73 °F)
± (3 % of measured value + 0.3 % of full scale)
Temperature coefficient
± 0.25 % of the measured value / °C deviating from 23 °C
(73 °F)
Pressure coefficient
2)
+ 0.5 % of the measured value / bar deviating from 7 bar
(102 psi)
Response time t
90
< 2 sec
Measuring rate
0.1 sec
Temperature
Measuring range
-20...60 °C
(-4...140 °F)
Accuracy
at 20 °C (68 °F) and flow >0.5 Nm/s
± 0.7 °C
(1.26 °F)
Outputs
Analogue output (scalable)
0 - 20 mA / 4 - 20 mA
, R
L
<500 Ohm
Switch output
DC PNP, max. 100 mA, V
drop
<2.5 V, 10 kOhm pull-down
Configurable: N/C or N/O, hysteresis, window
Pulse output
Consumption volume meter, pulse duration 0.02...2 sec.
Bus interface
Modbus RTU (max. 32 bus devices) or
M-BUS
(Meter-Bus)
Configuration interface
USB
General
Supply voltage
18 - 30 V DC
Current consumption (max.)
with display
I
max
≤
120 mA (P
max
≤2,5 W)
without display
I
max
≤
60 mA
(P
max
≤1,6 W)
Operating pressure (max.)
16 bar
(232 psi)
/ PN16
Ambient temperature
with display
0...50 °C
(32...122 °F)
without display
-20...60 °C
(-4...140 °F)
Medium and storage temperature
-20...60 °C
(-4...140 °F)
Humidity
0...100 % rH, non-condensing
Medium
Compressed air, nitrogen, oxygen, CO
2
, argon
Electrical connection
M12x1 4 pin plug
Electromagnetic compatibility
EN61326-1
EN61326-2-3
Industrial
environment
Material
Enclosure
Polycarbonate
Probe tube
Stainless steel 1.4404
Probe head / sensor
Stainless steel 1.4404 / glass
Measuring block
Aluminium anodised or stainless steel 1.4404
Enclosure protection class
IP65
1) The tolerance specifications include the uncertainty of the factory calibration with a coverage factor k=2 (2 x standard deviation). The tolerance was calculat-
ed in accordance with EA-4/02 following the GUM (Guide to the Expression of Uncertainty in Measurement).
2) The flow meter was adjusted at 7 bar (102 psi) (abs). At an operating pressure other than 7 bar (102 psi) (abs), the error can be corrected by entering the
actual system pressure (display menu or configurator software).
