Vaisala DRYCAP DMT340 SERIES Guía de usuario Pagina 20
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USER'S GUIDE____________________________________________________________________
20 __________________________________________________________________ M210704EN-E
Table 4 Optional Quantities and Their Abbreviations
Quantity Abbreviation Metric Unit Non Metric
Unit
Relative humidity RH RH %RH %RH
Temperature T T ºC ºF
Dewpoint/frost point in the
atmospheric pressure (T
d/f
)
TDFA ºC atm ºF atm
Absolute humidity (a) A g/m
3
gr/ft
3
Absolute humidity in standard
pressure and temperature (NTP)
ANTP g/m
3
gr/ft
3
Wet bulb temperature (T
w
) TW ºC ºF
Water vapor pressure (P
w
) PW hPa lb/in
2
Water vapor saturation pressure
(P
ws
)
PWS hPa lb/in
2
Enthalpy (h) H kJ/kg Btu/lb
Difference of T and T
d/f
(∆T) DT ºC ºF
Dewpoint temperature (T
d
)* TD ºC ºF
Dewpoint in the atmospheric
pressure (T
d
)*
TDA ºC atm ºF atm
* use these parameters only if you need dewpoint over water below 0 ºC/32ºF and not
over ice (industry standard)
Basic Features and Options
DMT340 has the following basic features and options:
- Dewpoint measurement with AutoCal and sensor purge features
- Sensor warming in high humidities
- Two analog outputs and a serial interface
- Several probes for different applications
- User friendly multilingual display option
- Calculated output quantities available.
- Different probe mounting kits, sensor protection options and probe
cable lengts 2 m, 5 m or 10 m.
- USB connectivity for service connections via the optional
USB-RJ45 cable
- Optional modules:
- galvanic isolation for outputs
- AC mains power supply
- RS-485 serial line
- LAN and WLAN interfaces
- data logger module with real time clock
- additional analog output module
- alarm relay module
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 5 6
- CHAPTER 6 6
- CHAPTER 7 7
- APPENDIX A 7
- List of Figures 9
- List of Tables 11
- GENERAL INFORMATION 13
- Version Information 14
- Feedback 14
- Recycling 15
- Regulatory Compliances 16
- Patent Notice 17
- Trademarks 17
- License Agreement 18
- Warranty 18
- PRODUCT OVERVIEW 19
- Basic Features and Options 20
- Structure of the Transmitter 21
- 0604-006 22
- INSTALLATION 25
- 0503-004 26
- 0804-065 26
- 0503-002 28
- Installation Kit 30
- Panel Mounting Frame 30
- 0704-002 31
- 0804-083 31
- Grounding the Cables 33
- 0605-028 34
- Probe Mounting 36
- Use with Sampling Cell 37
- CAUTION 38
- 0506-029 39
- 0503-034 40
- 0503-033 40
- 0503-021 42
- Standard 178 mm 120 mm 44
- Optional 400 mm 340 mm 44
- Tightening the Clasp Nut 45
- 0507-043 47
- Leak Screw Installation 49
- Process 50
- 0706-001 51
- 0503-022 53
- WARNING 55
- Warnings 55
- Installation 55
- Third Analog Output 59
- Alarm Relays 60
- RS-422/485 Interface 62
- LAN Interface 64
- WLAN Interface 65
- 0706-068 68
- OPERATION 71
- Graphic History 72
- 0706-030 73
- Changing the Language 75
- Rounding Setting 76
- Display Backlight Setting 76
- Display Contrast Setting 76
- Keypad Lock (Keyguard) 76
- Factory Settings 77
- Display Alarms 78
- 0802-069 79
- 0802-070 79
- Serial Line Communication 80
- User Port Connection 81
- Service Port Connection 82
- Using the Service Port 83
- LAN Communication 84
- Wireless LAN Configuration 87
- 0802-111 88
- 0802-110 88
- 0802-112 88
- Terminal Program Settings 91
- 0810-070 92
- List of Serial Commands 94
- Serial Line 96
- FTIME and FDATE 97
- General Settings 98
- Using Display/Keypad 101
- Using Serial Line 102
- Date and Time 103
- User Port Serial Settings 104
- Data Filtering 106
- Device Information 107
- Data Recording 111
- Analog Output Settings 114
- 0503-045 115
- AMODE/ASEL 117
- Analog Output Tests 118
- Operation of Relays 120
- Hysteresis 121
- 0610-077 123
- Networking Commands 127
- Sensor Functions 130
- Sensor Purge 131
- Manual Sensor Purge 132
- Interval Purge 132
- Power-up Purge 133
- Sensor Warming 134
- MAINTENANCE 135
- Error States 136
- Table 30 Error Messages 137
- Technical Support 138
- Return Instructions 138
- Vaisala Service Centers 139
- CALIBRATION AND ADJUSTMENT 141
- Adjustment Information 143
- Adjusting Dewpoint T 144
- 0706-020 145
- 0706-021 145
- 0706-022 145
- 0706-023 145
- 0706-024 147
- 0706-025 147
- 0706-026 147
- Adjusting Temperature 149
- Adjusting Analog Outputs 151
- TECHNICAL DATA 153
- Operating Environment 154
- Inputs and Outputs 154
- Mechanics 155
- Probe Specifications 155
- Modules 156
- RS-485 Module 157
- LAN Interface Module 157
- WLAN Interface Module 157
- Data Logger Module 157
- Options and Accessories 158
- Dimensions (mm/inch) 160
- 0804-035 161
- 0506-034 161
- 0804-129 163
- 0704-054 163
- CALCULATION FORMULAS 165
- 68.216 166
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