Heinrichs Messtechnik GmbH
OPERATING MANUAL TMU / UMC3
Page 15 of 122
Accuracy
Mass flow
Fluids
Accuracy TMU-x008 bis TMU-x050
± 0.1 % of actual flow ± zero point stability
(1)
Accuracy TMU-x080 bis TMU-x300
± 0.15 % of actual flow ± zero point stability
(1)
Repeatability error
± 0.05 % of actual flow (sensor with transmitter) ± ½ zero point
stability (1)
Mass flow
Gases
Accuracy TMU-x008 bis TMU-x050
± 0.5 % of actual flow ± zero point stability
(1)
Accuracy TMU-x080 bis TMU-x300
± 0.5 % of actual flow ± zero point stability
(1)
Repeatability error
± 0.25 % of actual flow (sensor with transmitter) ± ½ zero point
stability (1)
Additional measured values
Volume flow
± 0.2 % of actual value + zero point stability
Temperature
± 0.5 °C
Hysteresis
Not applicable
Settling time
1 to 15 seconds
Startup drift
15 minutes
Long-term drift
± 0.02 % of upper-range value per year
Influence of ambient temperature
± 0.005 % per K
Influence of fluid temperature
Compensated
Influence of fluid pressure
For fluids: too small to be relevant
(1) Refer to section 3.3.2, “TMU flow ranges” for detailed information on flow ranges.
Table 3: Measurement Deviation
