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ELTRA Manuals
Measuring Instruments
ONH-2000
Service manual
ELTRA ONH-2000 Service Manual
Oxygen / nitrogen / hydrogen determinators
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Contents
Table of Contents
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Table of Contents
Table of Contents
1 Faults
No Gas Flow
The Flow Rate Is Not Stable
The Base Line of the TC Cell Cannot be Adjusted to Zero
Analysis Time too Long
High Blank Value
Erratic Results
The LED for the Temperature Regulation of the Infrared Cell or the Thermoconductivity Cell Does Not Flash
No Analysis Start
The Message "No Water Flow" Appears on the Display
Furnace Temperature too High
The Base Line of the TC Cell Is Negative, See 2.12
No Furnace Power During the Analysis
The Sample Drop Motor Does Not Rotate
Noise or Drift of the Infrared Baseline
Furnace Cut-Off During Analysis
Beeper Responding
Saved Data Is Lost
1.21 the Chopper Motor Doesn`t Rotate
1.22 the Samples Make Bubbles
1.23 Spare Parts Kits
1.24 Unstable Current
2 Adjustments, Test and Function Explanation
Gas Flow Controller Adjustment and Jumper Settings
Pressure Switch
Infrared Zero-Baseline, Control and Adjustment
IR-Source Voltage Setting
Temperature Regulation of the IR-Cell
Pneumatics for Furnace Lift
Flow Rates
Furnace Lift Adjustment
Linearization
Balance Programming
TC Zero Baseline Adjustment
Diagnostic Printout
Temperature Regulation of the TC Cell
Water Flow and Furnace Temperature Sensing Board ON21
The Furnace Control Board PW13
Sample Drop Motor and the Motor Switch Adjustment
Hot Extraction Upgrade
3 Service
IR-Paths, Cleaning and Replacing
Infrared Electronics
Infrared Power Supply
Infrared Temperature Regulation
Replacing the EPROMS
Clearing Memory
Electronic Reset
Cleaning the Solenoid Valves
Replacing the Flow Sensor
Installing an AC Power Stabilizer
Replacing the Gas Pump
Additional Safety Features for Furnace Pneumatics (Optional)
230V / 400 V Operation
Upgrading of Analysers with Electronic Rack for Using the New Windows Software
4 Miscellaneous
Ordering Numbers
Purging of the Chopper
Maintenance OH- 900, on
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