Proservo NMS81
2 Endress+Hauser
Table of contents
Document information ....................... 3
Symbols .................................... 3
Function and system design ................... 5
Measuring principle ............................ 5
Integration of tank sensors ....................... 6
Measuring system ............................ 15
Input/output .............................. 16
Level measurement ........................... 16
HART Ex ia/IS active input ...................... 17
I/O modules ................................ 18
Power supply ............................. 24
Terminal assignment .......................... 24
Sources for gauge commands ..................... 24
Supply voltage .............................. 26
Cable entries ............................... 27
Cable specification ............................ 27
Overvoltage protection ......................... 27
Performance characteristics .................. 28
Reference operating conditions ................... 28
Measured value resolution ...................... 28
Maximum measured error ....................... 28
Hysteresis ................................. 28
Repeatability ............................... 28
Linearity .................................. 28
Long-term drift .............................. 29
Influence of ambient temperature ................. 29
Influence of medium temperature .................. 29
Influence of medium pressure .................... 29
Effect of gas phase ............................ 29
Installation ............................... 30
Requirements ............................... 30
Environment .............................. 37
Ambient temperature range ..................... 37
Classification of environmental conditions according to
DIN EN 60721-3-4 ........................... 37
Storage temperature .......................... 37
Humidity .................................. 37
Degree of protection .......................... 37
Electromagnetic compatibility (EMC) ............... 37
Process .................................. 38
Process temperature range ...................... 38
Process pressure range ......................... 38
Medium density ............................. 38
Medium density difference for interface measurement .... 38
Viscosity .................................. 38
Custody transfer approval ................... 39
Mechanical construction .................... 40
Dimensions ................................ 40
Weight ................................... 40
Materials .................................. 41
Operability ............................... 42
Operating concept ............................ 42
Operating options ............................ 42
Local operation .............................. 42
Remote operation ............................ 43
Operation via service interface .................... 43
Certificates and approvals ................... 44
CE mark ................................... 44
RCM-Tick marking ............................ 44
Ex approval ................................ 44
Single seal according to ANSI/ISA 12.27.01 ........... 44
Functional Safety (SIL) ......................... 44
WHG ..................................... 44
Weight & Measure approval ..................... 44
Non-ionizing radiation protection .................. 44
CRN approval ............................... 45
Pressure equipment with volume > 1 l (0.264 gal) and
product PS*V > 25 bar l (95.7 psi gal) ............... 45
Test, certificate .............................. 45
Other standards and guidelines ................... 46
Ordering information ....................... 47
Ordering information .......................... 47
Marking .................................. 47
Application packages ....................... 48
Advanced tank measurement methods .............. 48
Accessories ............................... 51
Device-specific accessories ...................... 51
Communication-specific accessories ................ 54
Service-specific accessories ...................... 54
System components ........................... 54
Documentation ............................ 55
Technical Information (TI) ...................... 55
Brief Operating Instructions (KA) .................. 55
Operating Instructions (BA) ..................... 55
Description of Device Parameters (GP) ............... 55
Safety instructions (XA) ........................ 56
Registered trademarks ...................... 57
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