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DEWCAP DM500
Vaisala DEWCAP DM500 - User Manual
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USER'S GUIDE
Vaisala DEWCAP
®
Precision SAW
Hygromete
r
DM500
M210205EN-D
2
Table of Contents
Main Page
Default Chapter
3
Table of Contents
3
Chapter 1 General Information
9
About this Manual
9
Version Information
9
Feedback
9
Table 1 Manual Revisions
9
Safety
10
General Safety Considerations
10
Product Related Safety Precautions
10
ESD Protection
11
Regulatory Compliances
11
Trademarks
14
License Agreement
14
Warranty
14
Chapter 2 Product Overview
15
Product Description
15
Front Panels
17
Figure 1 DMI500 User Interface Unit Front Panel
17
Figure 2 DMP501 Dewpoint Sensing Unit Front Panel
18
Back Panels
19
Figure 3 DMI500 User Interface Unit Back Panel
19
Figure 4 DMP501 Dewpoint Sensing Unit Back Panel
20
Optional Accessories and Spare Parts
21
Factory Calibration and Service
21
Functional Description
23
Chapter 3 Functional Description
23
DM500 Principle of Operation
23
Figure 5 DM500 Operating Principle Illusrated
23
Figure 6 RF-Signal Input/Output Illustrated
24
RF-Signal
24
Sensing Element
24
Contamination and Chemical Resistance
25
Chapter 4 General Information about Sampling and Results
27
Gas Sampling
27
Measuring in Overpressure
28
The Effect of the Ambient Temperature on Cooling Capacity
29
Figure 7 Effect of Ambient Air Temperature on Lowest Achievable Stable Sensor Temperature
29
The Effect of the Liquid Coolant Temperature on Cooling Capacity
30
Figure 8 Effect of Water Temperature on Lowest Achievable Stable Sensor Temperature
30
The Effect of the Sample Gas Flow Rate on Cooling Capacity and Result Deviation
31
Figure 9 Effect of Sample Flow Rate on Lowest Achievable Sensor Temperature
31
Figure 10 Effect of Sample Flow Rate on Dewpoint Measurement at
31
Chapter 5 Information on Optional Parts
33
Optional Heated Gas Tubes
33
Optional External Temperature Sensor
34
Figure 11 Mechanical Dimensions (in MM) for Optional Temperature Sensor
34
Wetted Materials of the Optional Parts
35
Chapter 6 Setting up for Operation
37
Connection of the DMI500 and DMP501 Units
37
Swagelok Tube Fittings' Installation Instructions
38
Figure 12 Standard 6 MM Swagelok Tube Fitting with the Elbow Connector in the DMP501 Back Panel
38
Connecting the Sample Gas Flow
39
Figure 13 ¼" Swagelok Adapter Fitting Connected to the Standard Swagelok 6 MM Connector
39
Figure 14 DMP501 Back Panel, Connectors for Sample Gas
39
Selecting the Cooling Method
40
Connecting the Cooling Liquid
41
Figure 15 DMP501 Back Panel, Connectors for Cooling Liquid
41
Connecting the Condensation Water Drain Tube
42
Chapter 7 Measuring the Dewpoint
43
Dewpoint Measurement with DM500
43
More about the Moisture Phases
44
Chapter 8 Displays and Menus
47
Main View (in Measuring Mode)
47
Figure 16 Main View Display
47
Graphical Display
48
Figure 17 DM500 Graphical Display
48
Menus and Navigation
49
Figure 18 DM500 Menus and Displays
49
Chapter 9 Basic Settings
51
User Interface
51
Setting the Language
51
Changing the Shortcut Keys
51
Key Click ON/OFF
52
Setting Date and Time
52
Device Information
53
Figure 19 DMI500 User Interface Unit Information
53
Figure 20 DMP501 Dewpoint Sensing Unit Information
53
Reverting Factory Settings
54
Chapter 10 Display Settings
55
Display Backlight
55
Selecting the Quantities and Units
55
Hold/Save Display
56
Graphic Trend
57
Contrast Adjustment
58
Alarm Sound
58
Chapter 11 Measurement Settings
61
Automatic Frost Detection
61
Forced Freezing
62
Cooling Method Air/Water
62
Statistical Filtering
63
Response Speed
64
Pump ON/OFF
64
Transient Recovery Time
65
Setting the Temperature, Pressure, and Flow Values
65
Chapter 12 Self Diagnostics Settings
67
Salt Detection
67
Sensor Circuit Check
68
Cooling Capacity Test
69
Error History
70
Chapter 13 Recording Data
71
Data Recording
71
Stopping Recording
72
Viewing Recorded Data
72
Checking the Recording Memory Status
72
Deleting All Record Files
73
Output Interfaces
75
Chapter 14 Output Interfaces
75
Figure 21 DMI500 User Interface Unit Back Panel (same as Figure 3)
75
Serial Communication Settings
76
Table 2 4-Wire Connection
76
Table 3 2-Wire Connection
76
Analog Outputs (Optional)
77
Relay Outputs (Optional)
79
Chapter 15 Calibrationd and Adjustment
83
General about Calibration and Adjustments
83
Calibration Interval
83
Calibration Laboratory
83
Calibrating DM500 Equipped with a Pump
84
Making an Adjustment
84
Figure 22 Gas Flow Rate from the Humidity Generator
84
Chapter 16 Serial Line Commands
87
Serial Commands
87
Output Commands (DMI500)
88
R Continuous Output
88
S Stopping the Continuous Output
89
ADDR Setting the Device Address
89
SEND Outputting One Single Reading
89
INTV Setting the Output Interval
89
FORM Defining the Output Format
90
Operational Commands
93
START Starting the Measurement
93
STOP Stopping the Measurement
93
PUMP Starting/Stopping the Optional Sample Gas Pump91
93
HEAT Starting/Stopping the Optional Heater
94
SALT Enables/Disables the Salt Contamination Detection92
94
SCAL Starts the Salt Detection Limit Determination Cycle93
95
PTEST Starts the Cooling Capacity Test
95
ANAL Starts/Stops the Statistical Filtering
96
FFROST Enabled/Disables the Automatic Forced Freezing Procedure
96
Setting Commands
97
SERI Setting the Serial Communication Parameters
97
UNIT Setting the Units
97
TIME Setting the Date and Time
98
RSEL Setting the Relays
98
ASEL Setting the Analog Outputs
99
AERR Setting the Invalid Output for Analog Channel
100
COOLER Setting the Cooling Method Status
101
FLOW Setting the Flow Value
101
XFLOW Setting the Flow Value Temporarily
102
PRES Setting the Pressure
102
XPRES Setting the Pressure Temporarily
102
TP Setting the Temperature
103
XTP Setting the Temperature Temporarily
103
Adjustments
104
CDP Adjusting Dewpoint Temperature (in 4
104
FCAL Adjusting the Flow Meter (in One Point)
107
PCAL Adjusting the Pressure Sensor (in Two Points)
107
Others
108
Outputting the Device Settings
108
Outputting the Device Settings in POLL-State
108
DEL Deleting the Data Files
108
DIR Outputting List of the Data Files
108
ECHO Setting the Echo ON/OFF
108
ERRS Outputting the Error Messages
108
HELP Outputting the Commands
109
INIE Reverting the Factory Settings
109
SMODE Selecting the Operation Mode
109
OPEN & CLOSE Opening and Closing the Lines
110
PLAY Outputting the Data File or History Memory
110
SCC Sensor Circuit Check
111
SSC Sensor Status Check
111
SNUM Outputting the Serial Numbers of DM500 and DMP501
111
VERS Outputting the Program Name and Version
112
Mi70 Link Program
113
Installation
113
Device Name MI70 DM500
113
Displayed Quantities
114
Sensing Unit Status
114
Real-Time Quantities
114
Real-Time Update Interval
114
Chart
114
Chapter 18 Maintenance
115
Cleaning the Sensor
115
Error Messages
117
Technical Support
118
Return Instructions
118
Chapter 19 Specifications
121
Measured Variables
121
Dewpoint Temperature
121
Figure 23 Dewpoint Temperature Measurement Repeatability
122
Figure 24 Dewpoint Temperature Measurement Response Time
122
External Temperature (Optional)
123
Integrated Pressure (Optional)
123
Integrated Flow (Optional)
123
General
123
DMP501 Dewpoint Sensing Unit
123
Options for DMP501
124
DMI500 User Interface Unit
124
Options for DMI500
125
Outputs
125
Electromagnetic Compatibility
125
Dimensions (in MM)
125
Appendix Ahumidity Theory
129
Measured and Calculated Results of DM500
129
Water Vapor in Air
129
Saturation Vapor Pressure
130
Dewpoint Temperature (T D )
130
Frost Point Temperature (T F )
130
Partial Pressure of Water Vapor (P )
131
Relative Humidity (RH)
131
Figure 25 Partial Pressure of Water Vapor over Water and Ice
131
Mixing Ratio (X)
132
Figure 26 Water Vapor Saturation Curves
132
Absolute Humidity (A)
133
Absolute Humidity at NTP (Antp)
133
Wet Bulb Temperature
133
Enthalpy (H)
133
Humid Air Volume/Dry Air Volume PPM
134
Effect of Pressure on Dewpoint
134
Using a Condensation Hygrometer
134
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Vaisala DEWCAP DM500 Specifications
General
Brand
Vaisala
Model
DEWCAP DM500
Category
Measuring Instruments
Language
English
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