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Table of Contents
Related Manuals for FE ZAJ
Summary of Contents for FE ZAJ
- Page 1 Service Manual PARAMAGNETIC OXYGEN ANALYZER TYPE: ZAJ TN512955b-E...
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Page 2: Preface
PREFACE This service manual contains information required for service engineers to perform maintenance and check of the paramagnetic oxygen analyzer. Since this manual does not provide basic description such as operating principle and key operation, you are requested to use this service manual together with related instruction manual. -
Page 3: Table Of Contents
CONTENTS PREFACE ..........................i CONTENTS ........................ii CAUTION ON SAFETY ....................iii 1. NAME OF EACH PART...................1 2. BEFORE MAINTENANCE ..................2 2-1. How to stop analyzer....................2 2-2. How to operate analyzer....................2 2-3. How to pull out inner case................... 2 3. ADJUSTMENT......................4 3-1. -
Page 4: Caution On Safety
CAUTION ON SAFETY First of all, read this “Caution on safety” carefully, and then use the analyzer in the correct way The cautionary descriptions listed here contain important information about safety, so they should always be observed. Those safety precautions are ranked in 2 levels; DANGER and CAUTION. Wrong handling may cause a dangerous situation, in which there is a risk of DANGER death or heavy injury. - Page 5 Caution on piping In piping, the following precautions should be observed. Wrong piping may cause gas leakage. If the leaking gas contains a toxic component, there is a risk of serious accident being induced. Also, if combustible gas is contained, there is a danger of explosion, fire or the like occurring.
- Page 6 Caution on maintenance and check Before working such as restrictor replacement with the casing open, be sure to turn off power supply, and perform air and N gas purging of not only the analyzer inside, but also the sample gas line and reference gas DANGER line.
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Page 7: Name Of Each Part
1. NAME OF EACH PART 1 Handle 1 Handle RA NG vol% vo l% 2 Knurled screw 2 Knurled screw 3 Power switch 4 Display and operation panel Front 8 Reference gas inlet 7 Purge gas inlet 6 Sample gas outlet 5 Sample gas inlet 12 Power terminal 9 I/O signal terminal 1... -
Page 8: Before Maintenance
2. BEFORE MAINTENANCE 2-1. How to stop analyzer If sample gas includes flammable, corrosive, and toxic gases, purge the inner case by supplying a safe gas such as N2 or air from the cylinder, and then pull it out. To stop the gas, supply zero gas for a few minutes for protection of the sensor. - Page 9 Photo 2-2 Inner case drawn Pull the handles toward you by holding them with hands. A stopper provided on the outer case prevents the inner case from being removed fully. Photo 2-3 Components inside the inner case SW power supply (1) (for magnet driving) SW power supply (2) (for circuit driving)
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Page 10: Adjustment
3. ADJUSTMENT 3-1. LCD contrast adjustment (Display 1: LCD at the top-front) The LCD of the concentration display is not provided with a means of performing contrast adjustment. The LCD contrast adjustment is performed by means of the VR of the display printed circuit board. -
Page 11: Output Adjustment (4 To 20Ma, 0 To 1V)
3-2. Output adjustment (4 to 20mA, 0 to 1V) To perform output adjustment, connect a digital voltmeter to the output terminal and set the measurement screen in the Factory Adjustment mode. Caution: Perform the output adjustment within the range of 4 to 2mA and 0 to 1V on the Adjustment screen. -
Page 12: Replacement Of Parts
4. REPLACEMENT OF PARTS 4-1. Replacement of restrictor Stop the analyzer as described in section 2.1, “How to stop analyzer”. Then, pull out the inner case. The restrictor for reference gas line should be replaced when it is clogged (if gas flow is reduced to less than 5 mL.) Be careful when handling the restrictor to prevent it from being clogging with foreign matter since the restrictor diameter is very small. -
Page 13: Replacement Of Sensor
4-3. Replacement of sensor Caution: Since accuracy cannot be guaranteed when sensors are replaced at the site, sensors must be factory-adjusted at replacement. First, be sure to turn OFF the power switch to the instrument. Disconnect the AC power cable. Supply a zero gas and then pull out the inner case from the instrument, and detach cap nuts for pipes ①... -
Page 14: Replacement Of Display
4-4. Replacement of display unit First, turn OFF the instrument power switch. Pull out the AC power cable. Draw the inner case from the instrument as described in section 2-3. Unscrew 6 screws from the side panel, 2 screws from the lower part of the inner case and remove the front frame from the inner case. Note that the soldered AC power cable cannot completely be removed from the instrument. -
Page 15: Check For Signals
5. CHECK FOR SIGNALS 5-1. Check of voltage across printed circuit board Check of power supply voltage CPU board J6 (GND) – J5 (+5V) ·············· +5.0 0.3V A/D board +15.0 0.5V J13 (GND) – ··································· J11 (+15V) 0.5V J13 (GND) –... - Page 16 ・Good 2 0.5V ・Not good 2 0.5V Perform the following procedure when synchronous rectification waveforms are widely different from the good example. Caution: Failure to adjust synchronous rectification waveforms may result in inaccurate measurement. If you go into a wrong Adjustment Item screen of the Factory mode, be sure to press the ESC key, and then retry from the first step.
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Page 17: Countermeasures Against Trouble
6. Countermeasures against trouble 6-1. Error code and countermeasures Error code Error message Cause Check and measures ･ Confirm the set zero or span calibration Err1 AUTO ZERO CAL ERR Calibration value is more value. Err2 AUTO SPAN CAL ERR than 20% FS ･... - Page 18 Err3 Input over error (INPUT OVER ERR) This code is displayed when the sensor signal is large. Countermeasures This error relates to reference gas, sample gas and range settings. First, check if the range settings are proper. Check if the reference gas is properly selected within the range to be set. (Starting from 0, N gas is selected.
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Page 19: Troubleshooting
6-2. Troubleshooting Indication Take anti-vibration Is ambient vibra- fluctuates large. countermeasure. tion large? Is ambient Include buffer tank noise large? in exhaust line. Reduce pressure Does measure- By stopping measured gas Is it reduced? ment gas pressure fluctuation. fluctuate? For reference gas joint Tighten cap By stopping measured gas... -
Page 20: Maintenance Parts
7. Maintenance parts Recommended Name Man. Drawing No. Remarks replacement cycle Restrictor TK708941C1 Reference gas joints 2 years Filter TK708922P2 Reference gas joints 2 years Packing TK722676P4 Near the filter 2 years Packing TK722676P4 For restrictor 2 years 2A, 6, 4 x 30 mm Fuse 757642 2 years... -
Page 21: Others
8. Others If transmission function (RS232C) is available as an option, the following parameters can be viewed by a dedicated tool. Zero and span calibration coefficients : A/D counted value at calibration Temperature table : Temperature table for temperature compensation Span temperature compensation table : Temperature compensation table for span point Zero temperature compensation table... -
Page 22: Appendix
Appendix Appendix-1. Piping diagram Rear panel of analyzer Inner case Sensor ① ⑤ INLET Gas inlet ② OUTLET Gas outlet ④ ③ Reference SUBGAS gas inlet Name of product Applicable length Piping diameter 3 mm/2mm ① Teflon tube About 0.5 m 5 mm/4mm ②... - Page 23 Appendix-2. Wiring diagram Appendix-3 Printed circuit board Appendix CPU printed circuit board TN512955-E...
- Page 24 Appendix 3-1 CPU printed board TN512955-E...
- Page 25 Appendix 3-2 A/D printed circuit board TN512955-E...
- Page 26 Appendix 3-3 Display output printed circuit board TN512955-E...
- Page 27 Appendix 3-4 Analyzer printed circuit board Appendix 3-5 Output printed circuit board TN512955-E...