Table of Contents
Chapter 6 – Communications .................................................................................................... 57
Ethernet Parameters ______________________________________________________________________ 57
Changing Ethernet Parameters ........................................................................................................................... 57
Ethernet Parameters and Settings ....................................................................................................................... 57
RS-232 Parameters _______________________________________________________________________ 58
Changing RS-232 Parameters ............................................................................................................................ 58
RS-232 Parameters and Settings ........................................................................................................................ 58
Modbus _________________________________________________________________________________ 59
Introduction to the Modbus Protocol ................................................................................................................. 59
F4T and F4 Modbus Mapping ............................................................................................................................ 59
Common Modbus Registers ............................................................................................................................... 60
F4 Compatibility Mode (Data Map 2) ................................................................................................................ 61
SCPI Programming Mode __________________________________________________________________ 62
GPIB and Ethernet Modbus Interface Converters (optional) _____________________________________ 63
Serial Modbus-to-GPIB Converter (Option 1052) ............................................................................................. 63
Serial Modbus-to-Ethernet Converter (Option 1056) ......................................................................................... 63
Programming Syntax for the F4T Controller ..................................................................................................... 64
Chapter 7 – Frequently Asked Questions ................................................................................. 67
Chapter 8 – Specifications .......................................................................................................... 69
Chapter 9 – Maintenance ........................................................................................................... 71
Preventive Maintenance Schedule ___________________________________________________________ 71
How to clean the chamber interior and exterior ................................................................................................. 72
How to drain the reservoir .................................................................................................................................. 72
How to inspect/change the water recirculation system filter cartridge ............................................................... 73
How to listen for abnormal noise or vibration ................................................................................................... 73
How to inspect the door seal .............................................................................................................................. 73
How to clean the condenser ............................................................................................................................... 74
How to inspect the electrical/refrigeration compartment ................................................................................... 74
How to Verify the Performance (Non-controlled humidity mode) .................................................................... 75
How to Verify the Performance (Controlled humidity mode) ........................................................................... 76
How to Verify the Temperature Calibration ...................................................................................................... 77
How to Verify the Humidity Calibration ........................................................................................................... 78
Humidity Sensor Calibration and Maintenance ................................................................................................. 78
F4T Controller Calibration _________________________________________________________________ 79
Equipment Required .......................................................................................................................................... 79
Input Setup and Calibration ............................................................................................................................... 79
Theory of Operation ______________________________________________________________________ 80
Overview ............................................................................................................................................................ 81
Air Heating System ............................................................................................................................................ 81
Humidity System................................................................................................................................................ 81
Refrigeration System .......................................................................................................................................... 81
Troubleshooting __________________________________________________________________________ 83
Refrigeration System Charging Instructions __________________________________________________ 84
Refrigerant Charge ............................................................................................................................................. 84
Replacement Parts ________________________________________________________________________ 85
Major Electrical Parts _____________________________________________________________________ 85
Major Refrigeration Parts _________________________________________________________________ 85
General Parts ____________________________________________________________________________ 85
Chapter 10 – Warranty .............................................................................................................. 87
Chapter 11 – Drawings ............................................................................................................... 89
