Table Of Contents - Michell Instruments PURA User Manual

Contents
Safety ...............................................................................................................................vii
Electrical Safety ..........................................................................................................vii
Pressure Safety ...........................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance ..............................................................................................vii
Calibration ..................................................................................................................vii
Safety Conformity .......................................................................................................vii
Abbreviations .................................................................................................................... viii
Warnings .......................................................................................................................... viii
1 INTRODUCTION ................................................................................................1
1.1 Features ............................................................................................................ 2
2 INSTALLATION ..................................................................................................3
2.1 Unpacking the Instrument ................................................................................... 3
2.1.1 Unpacking Pura Online Hygrometer ................................................................ 3
2.1.2 Unpacking Pura SEN (transmitter, no block version) ......................................... 4
2.1.3 Unpacking Pura OEM-single bag, PRM-double bag versions .............................. 5
2.1.4 Unpacking the Monitor .................................................................................. 5
2.2 Pura Online Components ..................................................................................... 6
2.3 Pura SEN ........................................................................................................... 7
2.4 Pura OEM, PRM .................................................................................................. 7
2.5 Monitor .............................................................................................................. 8
2.5.1 Fault Conditions ............................................................................................ 8
2.5.2 Monitor Controls and Indicators ..................................................................... 9
2.5.3 Electrical Connections .................................................................................. 10
2.5.4 AC Power Supply Input ................................................................................ 12
2.5.5 DC Power Supply Input (Optional) ................................................................ 13
2.5.6 Transmitter Connection ................................................................................ 14
2.5.7 Signal Output Connections ........................................................................... 15
2.5.7.1 Alarm Outputs ..................................................................................... 15
2.5.7.2 Re-transmission Output ........................................................................ 15
2.5.7.3 RS485 Modbus RTU Communications Port ............................................... 15
2.5.8 Mounting the Monitor .................................................................................. 16
2.6 Preparation of the Transmitter Cable .................................................................. 17
2.6.1 Electrical Connections .................................................................................. 17
2.6.2 Sensor Cable Assembly ................................................................................ 18
2.6.3 Cable selection for self-assembled cables ...................................................... 19
2.6.4 Maximum Loop Resistance vs Supply Voltage ................................................ 19
2.6.5 Wiring Connection Between the Transmitter and the Monitor .......................... 20
2.7 Transmitter Mounting ........................................................................................ 21
2.7.1 Sensor Block Connection (Recommended Method) ........................................ 21
2.7.2 Direct Pipeline Connection ........................................................................... 22
2.7.3 Pura OEM & PRM Connection ....................................................................... 23
3 OPERATION ....................................................................................................24
3.1 General Operational Information ....................................................................... 24
3.2 First Time Operation ......................................................................................... 25
3.3 System Alarms ................................................................................................. 26
3.3.1 Reversal of Default Alarm Switching Logic ..................................................... 27
3.3.2 Set-up Alarm Levels .................................................................................... 29
3.3.3 Configure Analog Output Current Loop ......................................................... 30
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Pura Online Hygrometer User Manual
97303 Issue 2, January 2022