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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
