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ELTRA
Measuring Instruments
CS-800
ELTRA CS-800 User Manual
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48
The base l
ine should rem
ain withi
n 10mV, 50 s
econds aft
er START.
If the drif
t is larger, t
hen check
the IR
-
sour
ce voltage
.
RF
-
interfer
ence on the IR
-
cell, or o
n the electron
ic units:
If the ge
nerator's hig
h frequenc
y
disrupts
the electro
nic unit
s or the infrar
ed cell,
t
hen
the bas
e line on th
e PC m
onitor appears j
erky.
47
49
Table of Contents
Table of Contents
4
Notes on the Service Manual
8
Modification Overview
9
Up to S/N 0766Xxxxxx
9
From S/N 0767Xxxxxx to 0950Xxxxxx
13
From S/N 0951Xxxxxx to 1079Xxxxxx
15
From S/N 1080 XXXX to 1556Xxxxx
20
From S/N 1557Xxxxxx
25
New Pneumatics (from End 2007)
26
Fault Messages
27
Check Base Lines
27
Fluctuating Gas Flow
28
Blocked Metal Dust Filter
29
Blocked Chemicals
29
Blocked Paper Filters
30
Blocked Lance Hole over the Crucible
30
Blocked Furnace Outlet
30
Too Low Oxygen Pressure
30
Outlet Tap of the Oxygen Regulator Is Not Properly Open
30
Contaminated or Corroded Solenoid Valve
30
Faulty Oxygen Regulator
30
Bent Plastic Tube of Oxygen Supply
30
Heavy Item Is Placed on the Plastic Tube of the Oxygen Supply
31
Twisted Plastic Tube Inside the Analyzer
31
Oxygen Supply Is Interchanged with the Compressed Air Supply
31
Blocked Dust Filter Cartridge
31
Blocked Fittings
31
Blocked Flow Sensor Assembly
31
Electronic Problem
31
High Carbon Results Are Erratic
32
No Combustion
33
No Oxygen Pressure
33
No Flow
34
Pre-Purging
34
Waiting for Stability
34
Integration Delay
35
Analyzing
35
The Command from the Microcontroller to Start the Generator Is Not Received
35
Measurements on TP9
35
Checking the Generator Tube
36
If the Filament of the Generator Tube Doesn't Glow
37
Checking the Primary Voltage on the High Voltage Transformer
38
The Rectifier Could also be Faulty
39
Loud Buzzing Sound When the Generator Turns on
42
Bad Combustion
42
Electronic- Drivers Malfunctioning
43
Furnace Does Not Close
45
Analysis Takes too Long
46
Additional Reasons for Excessive Analysis Duration Could be
47
One of the IR-Sources Is Unstable
47
Development of Dust When Closing the Furnace
50
Irregular Results
50
The Results Are Always 0.0000% or 00.0Ppm
51
Combustion Tube - Life Time Is too Short
51
IR-Cell Temperature Control Is out of Range
53
Breaker Turns off at the Beginning of Combustion
53
Further Causes Could be Found in the Oscillator Circuit
55
Breaker Turns off at the End of the Analysis
57
Furnace - Large Collection of Dust When Opening
58
No or Low Oxygen Pressure
59
Possible Faults on the Front Panel of the Analyzer
59
On the Rear-Side of the Analyzer
60
Inside the Analyzer
60
3.17.3.1 Oxygen Solenoid Valve (V5) May be Defective
60
3.17.3.2 Outflow Valve Does Not Close
61
3.17.3.3 if the Voltage on the Outflow Valve Is Constantly at 24 V, then
61
Other Faults
61
No Oxygen Flow
61
Status Window Message: "Waiting for Stability
61
Reasons for Instability
62
3.19.1.1 too Low Deviation Value
62
3.19.1.2 too High Noise
62
3.19.1.3 too High Drift
62
Furnace Opens with Delay after the End of Analysis
62
Oxygen Pressure Falls When the Furnace Opens
64
Combustion Without Starting Analysis
65
Crucible Cracks or Melts
68
Analysis Doesn't Start / no Peak on Screen
68
Vibrations on Setting 2
68
Analysis Cycle Stops before the Peak Begins
69
Chopper Motor Doesn't Rotate
70
Sample Burns but no Peak on the Screen
70
IR Signal Does Not Come down to the Base Line at the End of Analysis
70
Too Long Combustion of a very Low Carbon Sample
71
Copper Oxide Has a Bad Quality
72
Path Window Is Not Sealed or It Is Broken
72
Flow Stops During Analysis
73
Adjustments, Tests and Working Instructions
74
Gas Flow Controller Adjustment and Jumper Settings
74
Jumper Settings
75
Gas Flow Regulation
76
Infrared Base Line Adjustments
78
Infrared Cell Modification - General Information
78
General Test Points
81
Supply Voltages and Thermostatic Control Circuit
81
Supply Voltages for IR Signal Processing Circuit
81
Test Points IR-Ranges
83
Supply Voltages for IR Signal Processing Circuit
83
Outputs (Base Lines about 8VDC. for Golden Paths Adjust 6VDC)
83
Base Line Adjustments
84
Infrared Cell Board Irc1.X Sections Assignment
84
Explanations
84
Example
84
Voltage of a Base Line Is too High (Higher than 9.5V)
85
Source Voltage - Reducing
85
Drift too Large
86
IR Source Voltage Setting
87
IR Cell Temperature Control
88
Examples
88
Modifications for Higher Sensitivity (Gain) in the Low Sulphur Range
89
IRC Board and Cross-Talk
89
Pneumatics
90
Pneumatics Adjusting for Correct Furnace Movement
92
Pressure Regulation
93
Purge Pressure
94
Closing Cone Adjustment
96
Linearisation
97
Balance Programming
97
Induction Generator Control
97
Service
100
IR-Paths, Cleaning and Replacing
100
Available Infrared Paths
101
Infrared Electronics
102
General Test Points
103
Supply Voltages and Thermostatic Control Circuit
103
Supply Voltages for IR Signal Processing Circuit
103
IR-Channels Test Points
104
Supply Voltages for IR Signal Processing Circuit
104
Outputs (Base Lines about 8VDC. Less no Problem)
104
Infrared Power Supply
105
IR-Source
106
Leak Checking
108
Furnace Inlet System - Leaks
111
Leaks in the Furnace
111
Leaks in the Furnace Outlet System
111
Leaks Inside the Analyzer
111
Solenoid Valves Cleaning
112
Flow Sensor - Replacing / Cleaning
113
Flow Sensor Replacing
113
Furnace Pneumatics - Additional Safety Features (Optional)
114
Halogen Trap - Installing
115
Gas Saving Mode
115
Miscellaneous
117
Ordering Numbers
117
Infrared Cells
118
Front Side
120
Right Side
122
Pneumatics
124
Oscillating Circuit
126
Furnace
128
Furnace Cleaning
130
Wiring (I)
133
Uni 1
143
Gas Flow System
144
Valve Controlling
146
Opening the Furnace
147
Closing the Furnace
147
Spare Parts Kits
147
Common Spare Parts Kit for All Analysers
147
Maintenance
151
Index
152
4
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ELTRA CS-800 Specifications
General
Brand
ELTRA
Model
CS-800
Category
Measuring Instruments
Language
English
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