Owner manual

840 Operators Manual
Model 840 Operator Manual Rev. 1.9 iii
Table of Contents
1. Description..............................................................................................................................................1
2. System Operation...................................................................................................................................2
3. Specifications..........................................................................................................................................3
4. Installation..............................................................................................................................................4
4.1 Mounting and Cable Penetrations................................................................................................................... 4
4.2 Power and I/O Connections............................................................................................................................ 4
4.2.1 AC Power.................................................................................................................................4
4.2.2 DC Power ................................................................................................................................5
4.2.3 Analog 4-20mA Sensor Inputs .................................................................................................5
4.2.4 Serial Input Gas Sensors..........................................................................................................7
4.2.5 Serial Polling of the Model 840 Controller.............................................................................8
4.2.6 Relay Outputs...........................................................................................................................8
5. Start-up...................................................................................................................................................9
5.1 Power Switch Selections ................................................................................................................................9
5.2 Applying Power.............................................................................................................................................. 9
6. System Configuration..........................................................................................................................10
6.1 Analog/Serial input selection ....................................................................................................................... 10
6.2 Password Protection ..................................................................................................................................... 10
6.3 Navigating the Menus................................................................................................................................... 10
6.3.1 PROG Key: ............................................................................................................................11
6.3.2 “Up Arrow” Key: ..................................................................................................................11
6.3.3 “Down Arrow” Key:..............................................................................................................11
6.3.4 ENTER and Reset/Ack Key:...................................................................................................11
6.4 Main Display Functions ............................................................................................................................... 12
6.5 User-Interface Menu Functions.................................................................................................................... 12
6.5.1 Menu Flow Chart...................................................................................................................13
6.5.2 Calibration Mode...................................................................................................................14
6.5.3 Set # of Channels ...................................................................................................................14
6.5.4 Set Channel Range.................................................................................................................14
6.5.5 Set Channel Type ...................................................................................................................14
6.5.6 Set Channel Alarms ...............................................................................................................15
6.5.7 Set Relay Functions ...............................................................................................................15
6.5.8 Set Date and Time..................................................................................................................15
6.5.9 Set Modbus Address: .............................................................................................................16
6.5.10 View TWA and Peak Readings...............................................................................................16
6.5.11 View Event Records ...............................................................................................................16
6.5.12 Download History..................................................................................................................16
6.6 Alarm Test Mode.......................................................................................................................................... 17
6.7 Display Contrast........................................................................................................................................... 17
7. System Features ...................................................................................................................................18
7.1 Modbus Communications............................................................................................................................. 18
7.2 Download procedure ....................................................................................................................................20
8. Options..................................................................................................................................................26
8.1 Option for Battery Back-up Operation......................................................................................................... 26
8.2 Optional Interface PCB for Remote Display................................................................................................ 26
8.3 Optional Remote Alarm Reset/Acknowledge Switch .................................................................................. 26
8.4 Optional Type Z Enclosure Purge Assembly ............................................................................................... 27
9. Troubleshooting Guide........................................................................................................................28