Technical data
Prosonic M FMU44 HART
46
Hauser
14.4.2 Response time
The response time depends on the configured application parameters.
Minimum values:
Two-wire version: ≥ 3 s
14.4.3 Measured value resolution
2 mm (0.08 in)
14.4.4 Measuring error
Better than ±4 mm (±0.16 in)or 0.2 % of the measuring distance, the larger value applies
Observe typical measured error under reference operating conditions
• Linearity
• Reproducibility
• Hysteresis
14.4.5 Maximum measured error
According to EN 61298-2; under reference operating conditions
±0.2 % in relation to the maximum sensor span
14.4.6 Influence of gas phase
The vapor pressure of the medium at 20 °C (68 °F) is an indicator of the accuracy of the
ultrasonic level measurement.
Accuracy
Very good accuracy: vapor pressure at 20 °C (68 °F) less than 50 mbar (1 psi). This applies
for:
• Water
• Aqueous solutions
• Water/solid solutions
• Diluted acids, e.g. hydrochloric acid, sulfuric acid
• Diluted bases, e.g. sodium hydroxide solution
• Oils, greases, lime water, sludges or pastes
Accuracy impacted: high vapor pressures or outgassing from media, e.g.:
• Ethanol
• Acetone
• Ammonia
Please contact the sales organization if the accuracy is affected.
14.5 Environment
14.5.1 Ambient temperature range
–40 to +80 °C (–40 to +176 °F)
The functionality of the LCD display is limited at Tu < –20 °C (–4 °F) and Tu >
60 °C (140 °F)
If operating outdoors in strong sunlight, use a weather protection cover. Can be
ordered as an accessory.
