Technical data Deltabar FMD71, FMD72
128 Endress+Hauser
15.5 Environment
15.5.1 Ambient temperature range
• Without onsite display: –40 to +80 °C (–40 to +176 °F)
• With onsite display: –20 to +70 °C (–4 to +158 °F)
Extended temperature operation range with limitations in optical properties, such as
display speed and contrast. –40 to +80 °C (–40 to +176 °F)
For devices for use in hazardous areas, see Safety Instructions .
The device can be used in this temperature range. The values of the specification, such as
thermal change, may be exceeded.
15.5.2 Storage temperature range
–40 to +80 °C (–40 to +176 °F)
15.5.3 Climate class
Class 4K4H (air temperature: –20 to +55 °C (–4 to +131 °F), relative humidity: 4 to 100 %)
fulfilled as per DIN EN 60721-3-4 (condensation possible)
15.5.4 Degree of protection
IP66/68 NEMA 4x/6P
Degree of protection IP 68: 1.83 mH2O for 24 h
15.5.5 Vibration resistance
Housing Test standard Vibration resistance
Aluminum and steel housing IEC 61298-3 guaranteed for:
10 to 60 Hz: ±0.15 mm (±0.0059 in);
60 to 500 Hz: 2 g in all 3 planes
15.5.6 Electromagnetic compatibility
• Electromagnetic compatibility as per EN 61326 Appendix A and NAMUR
Recommendation EMC (NE21). For details, refer to the Declaration of Conformity.
• Maximum deviation: < 0.5 % of span
• All EMC measurements were performed with a turn down (TD) = 2:1.
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