Electric Sensor Unit - TESTO 6446 Instruction Manual

Electric sensor unit

3.1
The sensor records the standard volumetric flow of the working
compressed air according to the calorimetric measurement principle.
The standard volumetric flow is calculated on the basis of DIN ISO 2533
(1013.25 mbar, 15 °C and 0% relative humidity), unless otherwise stated
on the calibration certificate. The relevant unit is Nm³/h or Nl/min.
Observe the general operating conditions for compressed air
systems. The air quality of the working compressed air influences the
measuring accuracy as follows:
Quality classes according to
ISO 8573-1 particle/humidity/oil
1-4-1
3-4-4
Measuring signals
The instrument shows the current process values on a display. It
generates 2 output signals according to the parametrization.
• Current flow rate
• Current consumption quantity (pulse output module and totaliser)
Display
• Current volume flow in Nm³/h or Nl/min
• Current consumption quantity in Nm³
• Current average speed in Nm/s
• Current media temperature in °C
• Switching states of the respective outputs
10
The equipment is supplied loosely pre-assembled in 2 parts:
sensor and station. Also included in the scope of delivery:
• Calibration certificate in compliance with ISO/IEC 17025
Measurement errors
± (3% of reading + 0.3% of final
value of measuring range)
± (6% of reading, + 0.6% of final
value of measuring range)