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Michell Instruments Optidew User Manual
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Optidew
Chilled Mirror Hygrometer
User's Manual
97551 Issue 1
February 2018
2
Table of Contents
Optidew User's Manual
4
Default Chapter
4
Table of Contents
4
Safety
8
Warnings
8
Electrical Safety
8
Pressure Safety
8
Hazardous Materials (WEEE, Rohs2 & REACH)
9
Calibration (Factory Validation)
9
Repair and Maintenance
9
Abbreviations
10
1 Introduction
11
Optidew Series
11
Figure 1 Optidew 501 (Wall Mount) and Optidew 401 (Bench Top)
11
Optidew Sensor
12
2 Installation
13
Mounting
13
Optidew 501
13
Optidew 401
13
Figure 2 Optidew 501 Wall Mounting Points
13
Figure 4 Optidew 501 Non-Display Front Panel
15
Electrical Connections
18
Electrical Supply
18
Analog and Digital Communications
19
2.3.2.1 Digital Communications
19
Figure 10 RS485 & Analog Output Connector
19
2.3.2.2 Current Outputs
20
2.3.2.3 Relay Contacts
20
Sensor Installation
22
Environmental Monitoring
22
Sample Flow Monitoring
22
Integral Sensor Mounting
23
Temperature Probe Installation
23
Pressure Transmitter Installation
23
3 User Interface
24
Main Display
24
Main Screen
25
Customizable Readouts
25
Figure 14 Main Screen Layout
25
Menu Structure
27
Operational Status Display
28
Sensor Status Display
29
Setup Menus
30
Figure 15 DCC Menu
30
Figure 20 Clock Screen
35
Transmitter Version
38
Operating Cycle
39
Figure 24 Typical Operating Cycle
39
Operating Guide
40
Description
40
Operating Practice
40
Figure 25 Room Measurement Example
41
Good Measurement Practice
43
Sampling Hints
43
First Time Operation
46
Operational Functions
46
DCC Function
46
MAXCOOL Function
47
Frost Assurance Technology (FAST)
47
STANDBY Mode
47
Parameter Conversions & Pressure Compensation
48
Data Logging
48
Minimum Measurable Dew Points
48
Warnings and Faults
49
Figure 29 2-Stage Minimum Measurable Dew Point
49
5 Maintenance
50
Figure 30 System Alarm
50
Mirror Cleaning
51
Figure 31 Mirror Contamination Warning
51
Exchanging Sensors
52
Figure 32 Sensor Cleaning
52
Appendix A Technical Specifications
53
Appendix B Modbus Register Map
56
Appendix C Dimensional Drawings
66
Appendix D Quality, Recycling, Compliance & Warranty Information
75
Appendix E Return Document & Decontamination Declaration
76
Application Software
81
Connecting a Device
82
Data Acquisition
84
Main Options
84
Logging Setup
86
5.5 Strip Chart Controls
88
Configuration Screens
91
Modbus Slave
92
Humidity Profiling
94
4
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Michell Instruments Optidew Specifications
General
Brand
Michell Instruments
Model
Optidew
Category
Measuring Instruments
Language
English
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