Instructions for Use
– SCHMIDT
®
LED Measured Value Display MD 10.015
Page 15
Example application 2
– step by step
In a circular pipeline with DN 80 the consumption (m
3
) has to be measured
with two chamberhead flow sensors (measuring ranges:
0 … 60 m/s, an-
alog outputs:
4… 20 mA) according to Figure 4. Exceeding a flow volume
of 100,000 m³ shall be signalized by alarm output 1 without delays, using
a hysteresis of 15 m
3
. The complete volume flow range that can be meas-
ured, from maximum negative to maximum positive values, should be sig-
naled at the
display’s analog output in mode “current interface with offset”.
- Determination of volume flow measuring range: 60 m/s
≙
920 m³/h
Available from the sensor
’s instruction manual or by means of the
SCHMIDT
®
flow calculator:
www.schmidt-sensors.com/stroemungsrechner/volumenstrom-geschwindigkeit.html
- Install LED display in required position
- Plug both jumper for
“current measurement” in housing cover
- Install Sensor 1 and 2 according to Figure 4 in circular tube system
- Connect voltage supply of both sensors to LED display
- Connect analog flow outputs (w
N
) of both sensors to LED display
- Connect analog output and relay output 1 of LED display
- Connect current supply of LED display and close its housing
- After switching on the supply voltage:
Initialization followed by indication
of an “unconfigured” main value
Call-up configuration menu by pushing
for 2 seconds
Auxiliary
display
Main
display
Description
Operating mode: Bidirectional (both directions are counting)
Main display measurent value: Flow volume (m
3
)
Averaging of measurement values: Deactivated
Configuration analog input 1
Signal mode: 4 ... 20 mA
.
Accuracy of indication: 2 decimals
.
Start value: 0 m³/h (
≙
4 mA)
.
End value: 920 m³/h (
≙
20 mA)
Configuration analog input 2
Signal mode: 4 ... 20 mA
.
Accuracy of indication: 2 decimals
.
Start value: 0 m³/h (
≙
4 mA)
.
End value: 920 m³/h (
≙
20 mA)
