Thermal Mass Flow Sensor - TESTO 0699 6446 Series Instruction Manual

3 Description of the instrument
3.2.2
Sensor
Media
Accuracy
Display, operation
Display units*
Measuring dynamics
Response time
Pressure-tight
Media contact
Housing materials
Protection class
Medium temperature
Perm. ambient temperature
Perm. storage temperature
Electrical connection
Voltage supply
Output signals
Analog output
Switch output
Pulse output
Current carrying capacity
Readiness delay
CE
EU Directive
14

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.
Thermal, glass passivated ceramic sensor
Compressed air, with special calibration also CO2, N2
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
4-digit alphanumeric display, two operating buttons, operation
menu, LED (4x green for phys. units, 3x yellow for "Display x
1000" and switch statuses)
Nm³/min (Nl/min), Nm³/h, Nm³
1:300
< 0.1 s
up to 16 bar positive pressure
V2A (1.4301), glass passivated ceramic, PEEK, polyester,
Viton, anodized aluminium
PBT-GF 20, PC (APEC), Makrolon, V2A (1.4301), Viton
IP65 / III
0 - +60 °C (rel. humidity max. 90 %)
0 - +60 °C
-25 - +85 °C
M12 x 1 connector, can be loaded to 250 mA, short-circuit-proof
19 - 30 VDC, power consumption < 100 mA
4 - 20 mA, measuring range scaleable
max. load 500 ohm
2 switch signals can be parameterized (dependent on volume
flow, hysteresis or window function as NO or NC contact)
DN 65 – DN 80: 1 pulse/m³
DN 100 – DN 250: 1 pulse/10 m³
2 x 250 mA, short-circuit-proof, protected against polarity rever-
sal, overload-proof
0.5 s
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