Brewer MkIII Spectrophotometer Service manual
REVISION HISTORY REV - DESCRIPTION DCN # DATE APPD Initial Release ----- 98-11-06 TKLL A New Brewer Electronics 822 99-02-01 TKLL B Updated 868 99-08-13 C Updated 55 05-10-21 KBo D Updated 9 06-02-03 KBo E Hamamatsu PMT 08-11-14 KBo
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TABLE OF CONTENTS TABLE OF CONTENTS PREFACE ............................................................................................................................................... 3 1 PURPOSE AND APPLICATION ...................................................................................................... 3 2 EQUIPMENT REQUIRED ............................................................................................................... 3 3 MAJOR EQUIPMENT FAILURES .......................
Recommendations by Environment Canada Mark III Brewer Ozone Spectrophotometers are recommended by Environment Canada (EC) as the significantly superior model of Brewer instrument with which to measure ozone in the ultraviolet (UV) region of the spectrum. EC strongly discourages the use of other models of the Brewer instrument for the measurement of ultraviolet radiation or ozone in the UV because of the much poorer stray light performance of the single monochromator versions of the instrument.
PREFACE This document has been developed to aid an operator when a Brewer Spectrophotometer stops operating or whose operating characteristics have changed since leaving KIPP & ZONEN B.V.. It has been developed from the experience of KIPP & ZONEN and present users of the Brewer. The most likely electronic failures and ones which can be repaired in the field have been documented.
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3 MAJOR EQUIPMENT FAILURES 3 MAJOR EQUIPMENT FAILURES A major equipment failure is defined as a condition where there is no communication between the Brewer Spectrophotometer (Brewer) and the external control computer (PC). Symptoms are that no commands go to the Brewer, and no information is received by the PC. This is a "no operation" condition. 3.1 "NO OPERATION" - NO POWER INDICATION 1.
If the power supply appears to be normal, then the LED may be defective, or there may be a faulty connection. 4. Measure Voltages The main power supply voltages can be checked at the test points on J23 of the Main Electronics board. (Refer to the chart for correct voltages). Connector J23 Monitor points Pin 1 5v Pin 2 5v Pin 3 -5v Pin 4 12v Pin 5 12v Pin 6 -12v Pin 7 24v Pin 8 2.5v Pin 9 4.5v Pin 10 Gnd 3.
3 MAJOR EQUIPMENT FAILURES 4. Test RS422 adapter The RS422 adapter at the computer can be tested by removing the communications cable from the adapter, connecting pins 1-3, plugging the adapter into the Computer COM: port, and checking for echo-back as in step 3. Now switch connections to pins 2-4 and test again. The RS422 adapter is operating correctly if characters echo back. If a fault is indicated, then either the adapter or the power module is defective.
6. Line Driver If the reset of the motors is heard and seen, but there is no message sent to the PC, then there may be a problem with the line driver on the Main Electronics board. Ensure that power is turned off and remove the Main Electronics cover plate and replace IC U11, (on a socket 2 inches up and 2 inches to the left of the LED). Make sure to use proper grounding precautions before touching the electronics board. Leave the cover plate off and turn on the instrument.
3 MAJOR EQUIPMENT FAILURES 8. Check Voltages If the LED is not flashing, then the correct voltages should be confirmed for the power supply on the Main Electronics board J23, as per section 3.1. 9. Test Main Power Supply If the power supply values have changed, the power connections should be checked. If they appear normal, and the voltages are still not at proper levels, replacement should be considered. However, there may be a short circuit in one of the assemblies causing the power supply to be loaded.
D. Type readlog to display past error history, each line displayed will be a possible clue to the problem that caused the failure. If motor failures have occurred, the status will tell you which motor and what the failure is. Usually it is a sensor problem or a wiring problem that prevents the motor from resetting. If no problems are displayed, then the system can be placed back into cosmac mode for further testing. E. Type loadmode and following the return of the prompt, type cosmacmode .
4 OPERATING TEST FAILURES 4 OPERATING TEST FAILURES In the Brewer Spectrophotometer, most of the operating tests are done using either the mercury lamp or the quartz-halogen lamp. If any of the other tests fail, the user should proceed immediately to a mercury lamp test (HG) or a standard lamp test (SL). Mercury lamp test failures and standard lamp test failures are two major problems which can occur. In both cases calibration of the instrument may have been compromised.
2. Check Temperature Observe the temperature of instrument (TE). If the Brewer temperature is less than 0 degrees Celsius, the lamp may be too cold and may not fire. If this is the case, the Standard Lamp may be turned on for a few minutes to warm the Mercury lamp. 3. Check Lamp Voltage and Current There is the possibility of a lamp failure. Perform an AP (A/D voltages printout) test. If the Mercury Lamp current is 0.0, and the Mercury Lamp Voltage is near 15 volts, then the lamp is probably bad.
4 OPERATING TEST FAILURES to the actual high voltage divided by 409. There may be a variation of a volt or two of the high voltage, but the voltage at test point should be very close to the final test record value. If it is significantly different, the high voltage circuit may have failed. This will require a skilled technician for repair or KIPP & ZONEN should be contacted. 8.
3. Observe Slitmask Performance. If the mercury lamp test is normal, the spectrometer cover should be removed and another standard lamp test done while observing the slitmask. If the standard lamp fails again while the slitmask is operating correctly, KIPP & ZONEN should be consulted. 4. Photon Counting Circuitry If the mercury lamp test is not normal, there is probably a failure in the photon counting circuitry and section 4.9 of this manual should be consulted. 5.
4 OPERATING TEST FAILURES 4.6 LIGHT DETECTION SYSTEM FAILURE A Light Detection System failure may show up in any or all of the diagnostic or measurement tests of the Brewer. In Lamp diagnostics it will usually be shown on the Computer Display as "Lamp Not On .. test terminated” message. In a measurement (DS for example), the counts may simply go to zero, or some other incorrect number, depending on the nature of the failure.
5. Test Slitmask Slitmask operation can be confirmed by returning to Telytype operation (TT), sending the R,0,7,20 command, and noting that the slitmask moves back and forth pausing briefly at each of the 8 slitmask positions. Commands R,X,X,20 (where X =0 to 7) can be sent in sequence. After each command a slot in the slit mask should line up with a slot in the slit plate EXCEPT on command R,1,1,20, which is the Dark Count position.
4 OPERATING TEST FAILURES If these signals are normal, consult KIPP & ZONEN before proceeding further. If any of the signals are missing or are not clean square waves, replace this board. 11. Contact KIPP & ZONEN If all of these tests fail, there is a probable fault in the PMT, and KIPP & ZONEN should be contacted before proceeding. 4.
4.11 RATEMETER The ratemeter circuit provides a voltage output of the photon count rate. It consists of a twotransistor charge pump on the high speed amp board, and an integrator-amplifier on the Main Electronics board. A transistor is connected as a current pump and driven by one of the outputs of a J-K flip flop on the high speed amplifier board. The pulses from the flip flop are integrated by an RC network then scaled by an op-amp. 4.
4 OPERATING TEST FAILURES 4.16 BREATHER DESICCANT CARTRIDGE The breather desiccant cartridge allows the Brewer to compensate for normal pressure changes, while preventing the influx of moist air. Note that the breather desiccant does not remove moisture from the Brewer. Extra desiccant is needed to remove moisture from inside the instrument. Breather desiccant is housed in a plastic container with a breathing tube placed at the bottom of the cartridge.
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5 TEST RESULTS OUT OF SPECIFICATION 5 TEST RESULTS OUT OF SPECIFICATION Whenever any diagnostic tests are out of specification, (SL, HG,DT,RS,) the following should be done or considered. 1. If the deadtime has increased or decreased significantly, the High Speed Amplifier board may be defective, the slitmask may have become misaligned, or a ground in the instrument wiring may have become resistive. High moisture levels inside the instrument may also cause abnormal deadtime results. 2.
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6 OPTICS CARE AND CLEANING 6 OPTICS CARE AND CLEANING 6.1 OPTICS CARE - Never touch the polished surface of optics. - Hold an optic only by its edges. - Reduce the need for cleaning optics as much as possible. 6.2 OPTICS CLEANING - Use latex gloves when handling or cleaning optics. - Do not reuse cleaning materials.
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7 AZIMUTH TRACKER 7 AZIMUTH TRACKER Problems in the Azimuth Tracker affect the Brewer’s ability to track the sun, and thus any measurement that depends on direct solar radiation may be in jeopardy. Regardless of the problem, it is usually manifests itself as frequent failures of the Solar Siting test (SI), or the Steps per Revolution test (SR).
7.3 TRACKER ELECTRICAL PROBLEMS Electrical problems include AC power, power supply, motor driver board, stepper motor, and sensor/blocker assembly. 7.3.1 Sensor Problems The tracker is prevented from travelling past the zero (or North) position by a sensor that is attached to the aluminum drive plate. A blocking device which rotates with the Tracker body cuts a light beam in the sensor and the resulting change in sensor voltage output is detected by the electronics.
7 AZIMUTH TRACKER 5 If no pulses are seen at the Tracker, then look on pin 4, J17T on the Main Electronics board. nd This pin is the 2 from the left on the top row of solder connections just behind J17T when facing the removable plate of the Main Board.
Figure 7.
8 MAIN ELEC. FIRMWARE / CONFIG. LOADING PROCEDURES 8 MAIN ELECTRONICS FIRMWARE / CONFIGURATION LOADING PROCEDURES This procedure is used to upload new firmware for the BREWER Electronics or to update the configuration files stored in flash memory. The only time this procedure is required is if the firmware has been corrupted due to electrical surges or the memory had been replaced or if the configuration has changed due to some physical changes to the sensor settings or position stops. 8.
Exit out of the Brewcmd program by typing quit and the computer will have returned to the dos prompt. Run the BREWER operating program and then ensure the time and date is correct. 8.3 NEW CONFIGURATION UPLOAD If hardware changes have been made such as removing the zenith drive gear or adjusting the micrometer drive sensor mask, then correct values for zero offset and other parameters must be uploaded to the instrument for it to operate correctly.
8 MAIN ELEC. FIRMWARE / CONFIG. LOADING PROCEDURES These are some of the messages seen while going into the Cosmac mode. Motors should reset and it is ready to run the BREWER operating program type quit of Brewcmd To run the BREWER operating program type BREWER 8.4 to get out UPLOADING NEW FIRMWARE AND CONFIGURATION FILES As KIPP & ZONEN develops new firmware and features, it is now possible for the customer to upgrade the firmware without having to open the cover to the BREWER.
Type save a number should appear. This tell you how many configuration writes you had left when the save command was issued. The number of configuration writes left is one less then the number displayed. The number is ‘4’ should be displayed.
9 WARRANTY 9 WARRANTY MANUFACTURER'S GUARANTEE / WARRANTY CERTIFICATE NEW PRODUCT WARRANTY AND LIMITATION OF LIABILITY KIPP & ZONEN hereby warrants to its products to be free from defects in material and workmanship for a period of one year from date of purchase. KIPP & ZONEN’s obligation under this warranty is strictly and exclusively limited to repairing or replacing, at KIPP & ZONEN's discretion, any such equipment and / or parts thereof which have failed under normal use and service.
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10 BREWER REFERENCE DOCUMENTATION Section 10.1 Overall Assembly and External Cables - Configuration Control Diagram - BREWER System Drawing BS-C1000 - BREWER Assembly BA-C231 - Azimuth Tracker Option Kit BA-C91 BA-C91 BA-C113 - UVB Installation Kit BA-C114 / BA-C84 - Power Cable (External) BA-W12 - Data Cable (External) BA-W68 - Electronics Spares Kit List BA-C222 - Brewer Standard Spares Kit List BA-C112/B - Tracker Stand Tie-Down Kit Installation MKIII SERVICE MANUAL Figure 10.1-1.1 10.1-2.1 10.1-3.
Figure 10.1-1.
Figure 10.1-2.
Figure 10.1-3.
Figure 10.1-3.
40 Item no. BA-C231 Part No.
Figure 10.1.
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Figure 10.1-4.
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BA-C91 Item No.
Item No.
Figure 10.1-4.
Figure 10.1-5.
Item No. 1 3 BA-C113 Part No. BA-C91 83-79-116 Item No. 1 2 3 4 5 6 10 12 13 14 15 17 18 19 BA-C84 Part No.
Figure 10.
Figure 10.
Item No. 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 52 BA-C222 Part No. Brewer Electronics Spares Kit Description Qty BA-C99 BA-E103/B BA-E124 BA-P23 BA-W76/A BA-W76/B BA-W76/C BA-W77/B BA-W78 70-10-020 93-70-401 93-70-406 87-50-088 70-10-015 75-01-020 Azimuth Tracker Board Assy Power Supply Assy, 12V Electronic PCB Brkt Assy High Speed Amp Board Assy CABLE ASSY, MAIN TO MOTOR, 29.0 CABLE ASSY, MAIN TO MOTOR, 27.0 CABLE ASSY, MAIN TO MOTOR, 20.
Figure 10.
BREWER REFERENCE DOCUMENTATION Section 10.2 Power Supply and Harness - Main Power Connect Cable Assembly BA-W80 - Primary AC power Interconnect Harness Assembly BA-W81 - Power Supply Assembly BA-E103/B - Power Supply data sheet 54 MKIII SERVICE MANUAL Figure 10.2-1 10.2-2 10.2-2.1 10.2-2.2 10.2-2.
Figure 10.
Figure 10.
Figure 10.2-2.
Item No. 1 3 4 5 6 7 8 9 10 11 12 13 58 BA-E103/B Part No.
Figure 10.2-2.
Figure 10.2-2.
BREWER REFERENCE DOCUMENTATION Section 10.3 Internal Cabling Figure - Communication Cable Assembly BA-W84 - Internal Azimuth Drive Cable Assembly BA-W31 - DC to main & lamp Cable Interconnect Harness BA-W82 - Control Switch Cable assembly BA-W55 - Lamp Cable assembly BA-W83 - Motor Connectors Cable assembly BA-W76 - Main Lamp and HV Cable assembly BA-W77 - Hv board to PMT Cable assembly BA-W78 MKIII SERVICE MANUAL 10.3-1 10.3-2 10.3-3 10.3-4 10.3-5 10.3.6 10.3.7 10.3.
Figure 10.
Figure 10.
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Figure 10.
Figure 10.
Figure 10.
Figure 10.
BREWER REFERENCE DOCUMENTATION Section 10.4 Electronics Schematics Figure - Main Electronics Board Schematics BS-E123 - Lamp Control Electronics board Schematic BS-E129 - High Voltage Control Schematic BS-E131 - High Voltage supply Data Sheet - Humidity Sensor Data Sheet - Humidity Sensor Board Schematic (option) BS-E131 - Heater Control Board Schematic (option) 12505290 70 MKIII SERVICE MANUAL 10.4-1 10.4-2 10.4-3 10.4-4 10.4-5 10.4.6 10.
Figure 10.
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BREWER REFERENCE DOCUMENTATION Section 10.6 Optics Figure 10.6.1 Instrument Optics Overall Diagram -Optical Assembly BA-C191/B 10.6-1.1 10.6-1.2 10.6.2 Foreoptics - Assembly BA-F01 /C - Lamp BA-F96 - IRIS Actuator BA-F106 - Zenith Drive BA-F114 10.6-2.1 10.6-2.2 10.6-2.3 10.6-2.4 10.6.
Figure 10.6-1.
Figure 10.6-1.
Item No. 1 2 3 4 6 7 8 9 11 12 13 14 15 16 18 19 23 24 26 27 94 BA-C191/B Part No.
Figure 10.6-2.
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Figure 10.6-2.
Item No. 1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 18 19 20 21 22 98 BA-F01/D Part No.
Figure 10.6-2.
Figure 10.6-2.
Figure 10.6-3.
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Figure 10.6-3.
104 Item No. BA-S120/B Part No.
Figure 10.6-3.
Figure 10.6-3.
Figure 10.6-3.
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Figure 10.6-3.
Figure 10.6-4.
Figure 10.6-4.
Part List Part No. BAP02/C-F BM-P16 BM-P17 83-10-628 85-41-115 70-10-012 83-95-748 83-87-161 83-51-762 83-56-143 10-10-020 85-80-385 Description Qty BA-P01/B Photomultiplier Tube Assy Lens Retainer and Light Trap Filter Retainer O-ring, #028, 1 3/8x1 1/2x1/16 N.B.R. Label, Adhesive, 3/8"x1 1/4" Pillow Pak 2g silicagel Washer, #4 Split Lock, SS, Med Pat. 316 Screw, 4-40x1/4, Flt Hd, Hex Skt, SS Screw, 4-40x5/16, Btn Hd, Hex Skt Cap, SS Screw,Set, 6-32x1/4, Cup Pt, Hex Skt,SS Lens,BI/CX G1 FSD QTZ,38.
Figure 10.6-4.
Figure 10.6-4.
BREWER REFERENCE DOCUMENTATION Section 10.7 Brewer Options 10.7.1 Option B - Azimuth Pointing System - Azimuth Tracker and Stand - Azimuth Tracker Unit Schematic BA-C91 - Azimuth Tracker Board Schematic BS-C99 - Azimuth Motor Wiring BA-W20 - Azimuth Power Supply Specifications 10.7.3 Heater Option - Assembly BA-C223 Figure 10.7-1.1 10.7-1.2 10.7-1.3 10.7-1.4 10.7-1.5 10.7-3.1 10.7-3.2 10.7.4 Moisture Sensor - Assembly BA-E135 10.7-4 Section 10.8 Desiccant holder Assembly BA-C223 10.8 Section 10.
Figure 10.7-1.
Figure 10.7-1.
Figure 10.7-1.
Figure 10.7-1.
Figure 10.7-1.
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Figure 10.7-3.
Figure 10.7-3.
Figure 10.7.
Figure 10.
Our customer support remains at your disposal for any maintenance or repair, calibration, supplies and spares. Für Servicearbeiten und Kalibrierung, Verbrauchsmaterial und Ersatzteile steht Ihnen unsere Customer Support Abteilung zur Verfügung. Notre service 'Support Clientèle' reste à votre entière disposition pour tout problème de maintenance, réparation ou d'étalonnage ainsi que pour les accessoires et pièces de rechange.
