The unit operates to the calorimetric measuring principle and detects
the standard volume flow of operating compressed air (standard vol-
ume flow according to DIN ISO 2533, i.e. volume flow at 1013 hPa,
15°C and 0% relative air humidity).
Application
• Use in operating compressed air systems. The general operating
conditions of compressed air equipment apply.
• The quality class of the operating compressed air influences the
measurement accuracy.
26
Function and features
Evaluation
• Current flow rate.
• Current consumed quantity (pulse output and counter
function).
Display
• Current flow rate in Nm
3
/min or Nm³/h (4-digit display).
• Current consumed quantity in Nm³ (4-digit display between
0.000 and 4 0 0 0 *10
3
Nm
3
, for values > 9 999 Nm³ 1/1000
of the value is indicated and the LED 10³ signals that it
must be multiplied with the factor 1000).
• Consumed quantity before last reset in Nm³.
While this value is indicated LED 3 is flashing.
• Current medium temperature in °C.
The display unit is defined by programming (
→
page 38).
It can be changed in the Run mode temporarily.
Signal
output
Output 1
(3 selection options)
• Switching signal (limit value for flow rate, hysteresis or
window function, NO or NC).
• Pulse sequence for totalising meter: Output 1 provides a
counting pulse every time a set flow rate is reached
(
→
page 35 / 36, parameters
ImPS
and
ImPR
).
• Switching signal for preset counter (for time-dependent or
time-
in
dependent quantity monitoring;
→
page 40).
Output 2
(2 selection options)
• Switching signal (limit value for flow rate, hysteresis or
window function, NO or NC).
• Analogue signal (4 ... 20 mA) for flow rate.
Quality class
to DIN 8573-1
Measuring error
141
± (3% of MV + 0.3% of FV)
± (6% of MV + 0.6% of FV)
MV= measured value / FV = final
value of the measuring range
344
