240 Operators Manual
Model 240 Operator Manual Rev. 1.8 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 4-20 mA Sensor Inputs ................................................................................................5
4.2.4 Serial Input Gas Sensors..........................................................................................................7
4.2.5 Serial Polling of the Model 140 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: ............................................................................................................................10
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 Option for 4-20mA Output(s)....................................................................................................................... 26
8.3 Optional Interface PCB for Remote Display................................................................................................26
8.4 Optional Remote Alarm Reset/Acknowledge Switch ..................................................................................27
8.5 Optional Type Z Enclosure Purge Assembly ............................................................................................... 27
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