Vaisala GMP231 - Manual (Page 5)

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VAISALA _________________________________________________________________________ 3
Communication Flow ............................................................. 52
GMP231 State Machine ...................................................... 53
Examples of Communication Flow ...................................... 54
Timing .................................................................................. 56
Status Byte .......................................................................... 56
Checksum ........................................................................... 56
Status Word......................................................................... 57
Commands .............................................................................. 58
Get_Interface_Version ........................................................ 58
Get_Parameter .................................................................... 59
Example: Read CO
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Measurement Result .................... 60
Set_Parameter .................................................................... 61
Example: Set Compensation Temperature ......................... 62
Get_Parameter_Info ............................................................ 63
Adjust .................................................................................. 64
Adjusting Measurement......................................................... 65
One Point Adjustment ......................................................... 65
Two Point Adjustment ......................................................... 66
Data Registers ........................................................................ 66
Data Formats....................................................................... 66
Register Table ..................................................................... 67
CHAPTER 6
MAINTENANCE ........................................................................................... 70
Cleaning .................................................................................. 70
Chemical Tolerance ............................................................ 70
Changing the Filter ................................................................. 71
Changing the Silicone Plug ................................................... 72
Calibration and Adjustment .................................................. 73
Calibration Setup ................................................................. 73
Using Ambient Air as Reference .................................... 74
Using a Calibration Gas as Reference........................... 74
Effect of Environmental Compensations ............................. 74
Limits of Adjustment ............................................................ 75
Adjustment Types ............................................................... 75
I
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C Interface ................................................................... 76
Vaisala Industrial Protocol ............................................. 76
MI70 Hand-Held Indicator .............................................. 76
CHAPTER 7
OPERATING WITH MI70 INDICATOR ........................................................ 77
Overview of MI70 Support ..................................................... 77
Connecting GMP231 to MI70 Indicator ................................. 77
Changing Environmental Compensation Settings with MI70
Indicator .................................................................................. 78
Calibration and Adjustment with MI70 Indicator ................. 79
1-Point Adjustment with an MI70-Compatible Reference
Probe ................................................................................... 79
1-Point Adjustment with a Reference Gas .......................... 81
CHAPTER 8
TROUBLESHOOTING ................................................................................. 83
Problem Situations ................................................................. 83