TESTO 0699 6446 Series, Инструкция по эксплуатации

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3 Description of the instrument
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3.2.2 Thermal mass flow sensor
The thermal mass flow sensor for the compressed air volume flow meas-
urement is independent of the process pressure and the media temperature.
The electronic sensor assembly is adjusted to the data of the measurement
block (diameter/medium). For this reason, only an identically adjusted model
can be used when replacing the component. When ordering spares, the data
of the measurement block must be stated.
Sensor Thermal, glass passivated ceramic sensor
Media Compressed air, with special calibration also CO2, N2
Accuracy for compressed air quality classes (ISO 8573:
Particle - humidity - oil) 1-4-1:
± 3 % of reading ± 0.3 % of final
value
for compressed air quality classes (ISO 8573:
Particle - humidity - oil) 3-4-4:
±6 % of reading ± 0.6% of final
value
Display, operation 4-digit alphanumeric display, two operating buttons, operation
menu, LED (4x green for phys. units, 3x yellow for "Display x
1000" and switch statuses)
Display units* Nm³/min (Nl/min), Nm³/h, Nm³
Measuring dynamics 1:300
Response time < 0.1 s
Pressure-tight up to 16 bar positive pressure
Media contact V2A (1.4301), glass passivated ceramic, PEEK, polyester,
Viton, anodized aluminium
Housing materials PBT-GF 20, PC (APEC), Makrolon, V2A (1.4301), Viton
Protection class IP65 / III
Medium temperature 0 - +60 °C (rel. humidity max. 90 %)
Perm. ambient temperature 0 - +60 °C
Perm. storage temperature -25 - +85 °C
Electrical connection M12 x 1 connector, can be loaded to 250 mA, short-circuit-proof
Voltage supply 19 - 30 VDC, power consumption < 100 mA
Output signals
Analog output 4 - 20 mA, measuring range scaleable
max. load 500 ohm
Switch output 2 switch signals can be parameterized (dependent on volume
flow, hysteresis or window function as NO or NC contact)
Pulse output DN 65 – DN 80: 1 pulse/m³
DN 100 – DN 250: 1 pulse/10 m³
Current carrying capacity 2 x 250 mA, short-circuit-proof, protected against polarity rever-
sal, overload-proof
Readiness delay 0.5 s
CE
EU Directive 2004/108/EC
* The measurement, display and adjustment ranges are related to the stan-
dard volumetric flow according to DIN ISO 2533 (15 °C, 1013 mbar and 0 %
rel. humidity) if not otherwise entered in the calibration protocol of the elec-
tronic sensor assembly