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MIC 1422
Despatch MIC 1422 User Manual
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10
FIGURE 2-5
2.3 S
ensor Plac
ement (Thermocouple
or RTD)
Two-wire RTDs shou
ld be use
d only with lead len
gths less than
10 fe
et.
If th
e temp
erature prob
e is to be
subjected
to corrosive or abra
sive conditions, it
should
be prot
ected by the
appropriate
thermowell. T
he prob
e should b
e positione
d to ref
lect
true proc
ess tempe
rature:
•
In liquid m
edia - the
most agitate
d area
•
In air - th
e best circulat
ed area
13
15
Table of Contents
Table of Contents
3
Section 1: Product Description
5
General
5
Displays
6
Control
6
Alarms
6
Process Variable/Setpoint Value Re-Transmission Output
7
Section 2: Installation and Wiring
9
Mounting
9
Wiring Guidelines
11
Installation Considerations
11
AC Power Wiring
12
Wire Isolation
12
Use of Shielded Cable
12
Noise Suppression at the Source
13
Sensor Placement (Thermocouple or RTD)
14
Input Connections
16
Output Connections
21
Section 3: Operation
25
Control Capability
25
Control Responses
25
Direct/Reverse Operation of Outputs
26
On-Off Control
26
Time Proportioning Control
26
Current Proportioning Control
27
Power up Procedure
29
Keypad Operation
29
Front Panel Indicators
30
Section 4: Control Mode
31
Operation
31
Active Setpoint
31
Override Feature
32
Alarm Status Display
32
Over-Range I Under-Range Display
32
Manual Control (Percent Output)
33
Setup Modes
34
Section 5: Tune Mode
35
Tune Mode Description
35
Manual Tuning Method
36
Section 6: Alarm Mode
39
Alarm Mode Description
39
Loop Alarm Enable
44
Loop Alarm Time
44
Logical Combination of Alarms
45
Section 7: Test Mode
47
Test Mode Description
47
Section 8: Configuration Mode
49
Configuration Mode Description
49
Hardware Definition Code
52
Section 9: Calibration Mode
55
Entering Calibration Mode
55
Calibrating the Universal Input
55
Calibration Procedure
55
Calibrating the Secondary Analog Input
57
Equipment Required
57
Calibration Procedure
57
Exit from Calibration Mode
58
Calibration Check
58
Section 10: Enable Mode
59
Enable Mode Description
59
Section 11: Pre-Tune Mode
61
Pre-Tune Mode Description
61
Section 12: Autotune Mode
63
Autotune Mode and Description
63
How Auto-Tune Works
63
SECTION 13: Rapid FEATURE
65
Rapid Description
65
Appendix A: Board Layout - Jumper Positioning
67
Appendix B: Range Codes
73
For Thermocouple Inputs
73
For RTD Inputs
73
For DC Inputs
74
APPENDIX C: Rapid CONTROL FEATURE
75
Appendix D: Specifications
77
Input Specifications
77
Output Specifications
79
Control Specifications
81
Performance
82
DC Outputs
83
Operating Conditlons
83
Performance under Operating Conditions
84
Environmental
84
Physical
84
Appendix E: Software Reference Sheet
85
Appendix F: Flow Chart of Operation
88
Appendix G: Model Number Matrix
89
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Despatch MIC 1422 Specifications
General
Brand
Despatch
Model
MIC 1422
Category
Controller
Language
English
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