Varec Prothermo NMT539 Average Temperature Converter

The Prothermo NMT539 provides a single, intrinsically safe solution for average temperature and water bottom (interface) measurement. Choose the modules you need – temperature probe, water bottom sensor, converter – or combine them together into a single new instrument.

Specifications

Elements/Probe

Converter Compatibility: Pt100, Cu100, Cu90, PtCu100, JPt100 (maximum 16 elements)
With probe: up to 16 Platinum (Pt. 100), Class A elements per IEC PUB 751 1995

Accuracy

Temperature Accuracy: ±0.15 °C (±0.27 °F), or better conversion accuracy based on IEC 60751 class A standard
Water Bottom: 4mm (±2mm) or better accuracy (at reference condition)

Measuring Range

Temperature probe:
?40…+100 °C (?40…+212 °F), ?55…+235 °C (?67…+455 °F), -170… +60 °C (?328…+158 °F)
Water bottom probe: 0 to +100 °C (?32 to +212 °F)

Power & Communications

DC16?30V input (DC24V ±10% is supplied by the HOST i.s. HART communication line for standard applications.)
The Prothermo NMT539 consumes an average fixed current of 6 to 12 mA depending on configuration.

Approvals

Factory Mutual (FM) ? Intrinsically Safe ? Class I, Division 1, Groups C/D
Contact Varec for ATEX and IECEx approved devices.
Housing: rated IP65 (open housing: IP20)
Probe: rated IP68

Options

01 Approvals FM ? Intrinsically Safe ? Class I, Division 1, Groups C & D Contact Varec for ATEX and IECEx approved devices

02 Functionality Converter Temperature and Converter Water Bottom and Converter Temperature, Water Bottom and Converter

03 Temperature Measuring Range 40…+100 °C (?40…+212 °F) ?55…+235 °C (?67…+455 °F) ?170… +60 °C (?328…+158 °F)

04 Water Bottom Measuring Range None 1 m (3.3 ft) 2 m (6.6 ft)

05 Cable Entry Thread NPT 1/2 Thread M20

06 Process Connection Flange JIS 10K 50A RF, Stainless steel 316 Flange ANSI 2? 150lbs RF, Stainless steel 316 Flange DIN DN50 PN10 RF, Stainless steel 316 Flange JPI 2? 150lbs RF, Stainless steel 316 Universal coupling, PF(NPS)3/4, (converter only) Thread M20 (converter only)

07 Number of Elements 2…Pt100 elements 3…Pt100 elements 4…Pt100 elements 5…Pt100 elements 6…Pt100 elements 7…Pt100 elements 8…Pt100 elements 9…Pt100 elements 10…Pt100 elements 11…Pt100 elements 12…Pt100 elements 13…Pt100 elements 14…Pt100 elements 15…Pt100 elements 16…Pt100 elements

08 Element Spacing 2m (2000mm or 79?) 1.5m (1500mm or 59?) 1m (1000mm or 39?) Custom element position & spacing 3m (3000mm or 118?)

09 Probe Length Probe length 3 ft to 131ft below flange to edge of probe …..mm probe length …..mm probe length, gas?tight feed through

10 Mounting Accessories Anchor weight 7.09? tall, diameter 4.72? (180mm tall, diameter 120mm) Anchor weight – Low profile to be laid on bottom of tank Length 39.37? (1000mm); Diameter 1.61? (41mm) Tensioning wire + top anchor Tensioning wire, wire hook, R1 top anchor