Process - Endress+Hauser OTR31 Operating Instructions Manual

Technical data
11.5.1 Ambient temperature range
–40 to +85 °C (–40 to +185 °F)
11.5.2 Storage temperature
–40 to +85 °C (–40 to +185 °F)
11.5.3 Operating altitude
Up to 4 000 m (13 123.36 ft) above sea level
11.5.4 Degree of protection
IP65
IP66
11.5.5 Shock resistance
50 g as per DIN IEC 68-2-27 (11 ms)
11.5.6 Vibration resistance
• 20 g as per DIN IEC 68-2-6 (10-2000 Hz)
• 4 g as per marine approval
11.5.7 Electromagnetic compatibility (EMC)
CE conformity
Electromagnetic compatibility in accordance with all the relevant requirements of the IEC/EN
61326 series and NAMUR Recommendation EMC (NE21). For details refer to the EU
Declaration of Conformity.
Maximum measured error <1% of measuring range.
Interference immunity as per IEC/EN 61326 series, industrial requirements.
Interference emission to IEC/EN 61326 - series, electrical equipment Class B.
11.5.8 Electrical safety
• Protection class III
• Overvoltage category II
• Pollution level 2
11.6

Process

11.6.1 Process temperature range
–50 to +150 °C (–58 to +302 °F)( or –50 to +200 °C (–58 to 392 °F) with extension neck).
Restrictions depending on process connection and ambient temperature:
• No restriction with compression fitting (see Accessories, order no. 51004751, 51004753)
and extension neck length min. 20 mm (0.79 in)
• with process connection:
34
M16 x 1.5 or NPT ½", valve connector
M12 x 1 connector
Temperature switch OTR31, OTR35