Dwyer Instruments MTL7700 Series - Page 2

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INM7700-6 Jan 2010

Table of Contents3
Overview5
Description5
Introduction5
MTL7700 Series - Barrier Ranges5
MTL7700 Series - Accessories6
Safety Considerations7
General Requirements7
Safety Checks7
Installation7
General7
Mounting/Removing Barriers7
Installing Accessories7
Wiring Connections11
General11
Barrier Connections11
Connections to Plant Earth11
Connections to Dummy Barriers13
Maintenance13
General13
Routine Inspection13
Fault-Finding14
Introduction14
Power Supply Check15
Barrier Resistance Test15
Equipment and Barrier Tests15
Thermocouple and RTD Tests15
Barrier Tests15
Tests for Active Barriers16
Test Tables for Passive Barriers18
Appendix A: Typical Wiring Connections for Specific Applications21

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Dwyer Instruments MTL7700 Series - Page 2

Table of Contents