Vaisala DRYCAP DMT346 Guide de l'utilisateur Page 115
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Chapter 5 ___________________________________________________ Calibration and Adjustment
VAISALA_______________________________________________________________________ 113
One-Point Dewpoint Adjustment
One-Point Dewpoint Adjustment
Using Display/Keypad
NOTE
This is a highly critical adjustment, to be performed only in
laboratory conditions.
Preferably use the display/keypad interface to perform one-point
dewpoint T
d/f
adjustment. Before proceeding with the Td/f adjustment
you must perform the RH adjustment. For DMT345/346, the
reference dewpoint must be below -25 °C (-13 °F) and temperature
must be below 40 °C (104 °F).
NOTE
This adjustment is valid only if the measurement or process is in the
lower end of the measurement range (in very dry). See Specifications
on page 127.
When adjusting the dewpoint, refer to the following instructions:
1. Press the ADJ button on the motherboard to open the
ADJUSTMENT MENU.
2. Press the ► arrow button to select Adjust T
d
measurement.
3. Select by pressing 1-point T
d
adjustment. Press START to
start adjusting.
4. Leave the sensor to stabilize for at least one (1) hour. Follow the
instructions on the display.
0605-018
Figure 50 Following Stabilization
- USER'S GUIDE 1
- Table of Contents 3
- CHAPTER 4 4
- CHAPTER 5 6
- CHAPTER 6 6
- List of Figures 7
- List of Tables 8
- GENERAL INFORMATION 11
- Version Information 12
- Related Manuals 12
- WARNING 13
- CAUTION 13
- ESD Protection 14
- Recycling 14
- Feedback 14
- Trademarks 15
- License Agreement 15
- Warranty 16
- PRODUCT OVERVIEW 17
- Basic Features and Options 19
- Operating Principle 19
- Parts Description 20
- Transmitter Body 20
- 0604-006 21
- Probes and Cooling Set 22
- INSTALLATION 23
- 0604-008 24
- 0604-009 25
- 0604-010 25
- 0604-011 26
- 0604-012 27
- Kit for Pole or Pipeline 28
- Mounting Rain Shield with 29
- Installation Kit 29
- Panel Mounting Frame 30
- DMT345 Probe Mounting 31
- Installation with Flange 31
- 0604-020 32
- Parts of the Cooling Set 34
- Mounting Instructions 35
- 0604-024 36
- 0604-025 37
- Cable Bushings 38
- Cable Grounding 39
- Connections to 24 VAC Power 42
- Power Supply Module 43
- Installation 44
- Warnings 45
- Alarm Relays 48
- RS-422/485 Interface 50
- 1 (not connected) RxB 51
- 2 (not connected) RxA 51
- 4 B TxB 51
- 5 A TxA 51
- RS-485 master Data DMT346 52
- 8-Pin Connector 54
- OPERATION 55
- Basic Display 56
- Graphic History 57
- Menus and Navigation 58
- Display Backlight Setting 59
- Changing Language Setting 59
- Rounding Setting 59
- Display Contrast Setting 60
- Keypad Lock (Keyguard) 60
- Menu PIN Lock 60
- Factory Settings 61
- Serial Line Communication 62
- User Port Connection 63
- Service Port Connection 63
- Terminal Program Settings 64
- DMT346/2.01 65
- List of Serial Commands 66
- Table 22 Other Commands 67
- Getting Measurement Message 68
- FTIME and FDATE 69
- Resetting the Device 71
- Keypad/Menu Locks 71
- General Settings 72
- Modifier Description 73
- Using Buttons on Motherboard 76
- User Port Serial Settings 77
- >SERI 600 N 8 1 78
- 600 N 8 1 78
- Mode Output Commands used 79
- SEND [addr] 79
- >INTV 10 min 79
- Output intrv. : 10 min 79
- OFF No filtering 80
- Device Information 81
- Data Recording 83
- Selecting Data Recording 83
- Quantities 83
- View Recorded Data 84
- Deleting Recorded Files 87
- Analog Output Settings 87
- 0503-045 88
- Analog Output Quantities 89
- AMODE/ASEL 90
- Analog Output Tests 91
- Setting 92
- Relay Operation 93
- Quantity for Relay Output 93
- Relay Setpoints 93
- Hysteresis 94
- Enabling/Disabling Relays 95
- Indication Led Operation 95
- Setting Relay Outputs 95
- 0605-040 96
- Testing Operation of Relays 98
- RS-485 Module Operation 99
- OPEN [nn] 101
- Sensor Functions 102
- AutoCal 102
- Automatic AutoCal 103
- Manual AutoCal 103
- Sensor Purge 104
- Power-Up Purge 105
- Manual Sensor Purge 105
- Interval Purge 105
- 0504-051 106
- Sensor Warming 107
- CALIBRATION AND ADJUSTMENT 109
- Adjustment Information 111
- Using Display/Keypad 112
- Using Serial Line 113
- >a01 117
- Wait for Purge data...OK 117
- Adjusting Temperature 118
- Adjusting Temperature Using 118
- Display/Keypad 118
- Adjusting Analog Outputs 120
- Serial Line 121
- MAINTENANCE 123
- Error States 124
- Error Message Action 125
- Technical Support 126
- Return Instructions 126
- Vaisala Service Centers 127
- TECHNICAL DATA 129
- 0605-043 130
- Property Description / Value 131
- Models) 132
- Options and Accessories 133
- Technical Specifications of 133
- Optional Modules 133
- Description Specification 134
- Dimensions in mm (inches) 135
- Spare Parts 136
- APPENDIX A 137
- CALCULATION FORMULAS 141
- 99.621 ⋅= 142
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