Vaisala MMT330 - Manual (Page 6)

User's Guide _______________________________________________________________________
6 ____________________________________________________________________ M210764EN-F
Deleting the Recorded Files .............................................. 113
UNDELETE .................................................................. 113
Analog Output Settings ....................................................... 114
Changing Output Mode and Range ................................... 114
Analog Output Quantities .................................................. 115
AMODE/ASEL .............................................................. 116
Analog Output Tests .......................................................... 117
ITEST ........................................................................... 117
Analog Output Fault Indication Setting .............................. 118
AERR ............................................................................ 118
Extend Analog Output Range ............................................ 119
Operation of Relays .............................................................. 119
Quantity for Relay Output .................................................. 119
Relay Setpoints ................................................................. 119
Hysteresis .......................................................................... 121
Relay Indicating Transmitter Error Status ......................... 121
Enabling/Disabling Relays ................................................. 123
Setting Relay Outputs........................................................ 123
RSEL ............................................................................ 125
Testing Operation of Relays .............................................. 126
RTEST .......................................................................... 126
CHAPTER 5
MODBUS .................................................................................................... 127
Overview of Modbus Protocol Support .............................. 127
Taking Modbus into Use .................................................... 128
Enabling Serial Modbus ....................................................... 129
Using Display/Keypad (Optional) ...................................... 129
Using Serial Line ............................................................... 129
Enabling Ethernet Modbus .................................................. 130
Using Display/Keypad (Optional) ...................................... 130
Using Serial Line ............................................................... 132
Diagnostic Modbus Counters .............................................. 133
Viewing Counters Using Display/Keypad .......................... 133
Viewing Counters Using Service Port ............................... 133
Disabling Modbus ................................................................. 134
CHAPTER 6
MAINTENANCE .......................................................................................... 135
Periodic Maintenance ........................................................... 135
Cleaning ............................................................................ 135
Changing the Probe Filter ................................................. 135
Changing the Sensor ........................................................... 136
Error States ....................................................................... 137
Technical Support ................................................................ 139
Product Returns.................................................................... 139
CHAPTER 7
CALIBRATION AND ADJUSTMENT ......................................................... 141
Cleaning the Sensor ............................................................. 142
Opening and Closing the Adjustment Mode ...................... 142
Relative Humidity Adjustment ............................................. 143