agw #1 lab acceptance test report rev b - aip.de filelbt project 2 x 8,4 optical telescope test...

LBT PROJECT

2 X 8,4 OPTICAL TELESCOPE

Test Report

LBT AGw #1 Lab Acceptance Testing

LBT PROJECT 2x8,4m TELESCOPE

Doc.No. : 680s001 Issue : B Date : 1 August 2005

Large Binocular Telescope LBT Agw #1

Lab Acceptance Test

Doc.No : 680s001 Issue : B Date : 1-Aug-2005

1. Revision History Issue Date Changes Responsible A 12-Jul-05 First issue Joar Brynnel B 1-Aug-05 Second issue

Sect 3.5: New section Sect 7.3 and 7.4: Clarification of results Sect 9: Removed PEPSI units from deliverables Sect 11: AI #1 and #2 closed

Joar Brynnel


Lab Acceptance Test


2. Table Of Contents

1. REVISION HISTORY ............................................................................................. 2

2. TABLE OF CONTENTS ......................................................................................... 3

3. ABOUT THIS DOCUMENT................................................................................... 5 3.1. PURPOSE .............................................................................................................. 5 3.2. SCOPE .................................................................................................................. 5 3.3. EXECUTIVE SUMMARY ......................................................................................... 5 3.4. REFERENCE DOCUMENTS..................................................................................... 6 3.5. APPLICABLE DOCUMENTS.................................................................................... 6

4. LAB ACCEPTANCE TEST DEFINITION ........................................................... 7

5. REQUIREMENTS REVIEW.................................................................................. 8 5.1. [RD1] 680A020D AGW UNITS TECHNICAL SPECIFICATION ................................ 8 5.2. [RD2] 680A010C AGW UNITS FUNCTIONAL REQUIREMENTS ............................. 8 5.3. [RD4] CONTRACT #AO101, “TELESCOPE ACQUISITION, GUIDE AND WAVEFRONT UNITS” ....................................................................................................... 8

6. SYSTEM TESTS....................................................................................................... 9 6.1. DETECTORS.......................................................................................................... 9 6.2. MECHANICS ....................................................................................................... 10 6.3. OPTICS ............................................................................................................... 10 6.4. SOFTWARE ......................................................................................................... 10 6.5. THERMAL PERFORMANCE................................................................................... 11 6.6. HOT SWAP TEST.................................................................................................. 11 6.7. HANDLING DEVICE............................................................................................. 12 6.8. INTERFACES ....................................................................................................... 12

6.8.1. Mechanical Interface ................................................................................ 12 6.8.2. Electrical Interface ................................................................................... 12 6.8.3. Cooling Liquid .......................................................................................... 13 6.8.4. Compressed Air......................................................................................... 14 6.8.5. Ethernet..................................................................................................... 14 6.8.6. Optical Interface ....................................................................................... 14

6.9. GENERAL INSPECTION........................................................................................ 15

7. TEST RESULTS ..................................................................................................... 16 7.1. START-UP PROCEDURE ....................................................................................... 16 7.2. MOVING FUNCTIONS POSITIONING TIME ........................................................... 17

7.2.1. X-axis ........................................................................................................ 17 7.2.2. Theta-axis.................................................................................................. 17 7.2.3. Combined X and Theta.............................................................................. 17 7.2.4. Filter wheel ............................................................................................... 17


Lab Acceptance Test


7.2.5. Focus......................................................................................................... 17

7.3. RELATIVE POSITIONING ACCURACY ................................................................... 18 7.3.1. X-axis ........................................................................................................ 18 7.3.2. Theta-axis.................................................................................................. 19 7.3.3. Focus stage ............................................................................................... 19

7.4. ABSOLUTE POSITIONING ACCURACY .................................................................. 20 7.4.1. X-axis ........................................................................................................ 20 7.4.2. Theta-axis.................................................................................................. 20 7.4.3. Focus stage ............................................................................................... 20

7.5. REPRODUCIBILITY AT VARYING GRAVITY VECTOR............................................. 21 7.5.1. X-axis ........................................................................................................ 21 7.5.2. Theta-axis.................................................................................................. 22

7.6. PROBE MOTION RANGE....................................................................................... 23 7.6.1. X-axis ........................................................................................................ 23 7.6.2. Theta-axis.................................................................................................. 23

7.7. AMBIENT SENSORS............................................................................................. 23 7.7.1. Temperature sensor .................................................................................. 23 7.7.2. Humidity sensor ........................................................................................ 23

7.8. COLD TEST......................................................................................................... 24

8. SHIPPING/SCHEDULE ........................................................................................ 25

9. DELIVERABLES ................................................................................................... 25

10. DOCUMENTATION.......................................................................................... 26

11. ACTION ITEMS................................................................................................. 27


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3. About this document

3.1. Purpose Subsystems manufactured for the Large Binocular Telescope (LBT) shall be subjected to acceptance testing before leaving suppliers premises. The test constitutes a major milestone, and based on the test result the LBT Director will grant “Lab Acceptance” after which the equipment may be shipped to Arizona. This document describes test results from Lab Acceptance Tests of the first “Acquisition, Guide and Wavefront” (AGW) unit, performed at Astrophysikalisches Institut Potsdam (AIP) on July 4-6 of 2005. Lab acceptance testing of AGW units #2, #3 and #4 will be done at a later time as those units are assembled and tested in Potsdam.

3.2. Scope A discussion on technical requirements is presented. Detailed test results are listed, and resulting action items are summarized.

3.3. Executive summary The AGw units are very important LBT subsystems. This is a key component for telescope performance and to establish a platform for AO secondary mirrors operation. It is a pleasure to report that the design and implementation of the AGw units exceed expectations in almost all areas. No showstoppers were identified; however some issues need further attention (see Action Item list). Given the tight schedule to shipping to Arcetri, it will require a major effort from the AIP team to finish open issues without introducing further schedule delays that could impact the AO development in Arcetri. Areas that need special attention are optical alignment and test, optical interface verification, motor performance at low temperatures, flexure testing and documentation. The AGW #1 Lab Acceptance Test is declared as “Passed with Action Items”, and the whole AIP AGW team shall be congratulated for their outstanding work. The Project Office would also like to thank AIP for the excellent cooperation during Lab Acceptance Testing.


Lab Acceptance Test


3.4. Reference Documents [RD1] 680a020d AGW units Technical Specification , Jesper Storm, Apr 23, 2002 [RD2] 680a010c AGW units Functional Requirements, Jesper Storm, Feb 28, 2001 [RD3] 680g111b, AGW Lab Acceptance Test plan, Jesper Storm and Joar Brynnel [RD4] Contract #AO101, “Telescope Acquisition, Guide and Wavefront Units”

3.5. Applicable Documents The following documents report AGW #1 tests that were performed before official Lab Acceptance testing was carried out: [AD1] 682g540 AGW-1 Detector Test report [AD2] 680g103 AGW-1 Flexure Test document [AD3] 680g??? AGW-1 Optics Test report [AD4] 680g??? AGW-1 Thermal Performance Test report


Lab Acceptance Test


4. Lab Acceptance Test definition The Lab acceptance test is performed jointly by the supplier AIP and LBT PO. The purpose of the test is to verify subsystem completeness and performance. Test results are summarized in this document. Tests were based on a test plan [RD3] that was written by AIP and reviewed by LBTO. Tests are focused around four main points: 1. Performance Scientific and technical performance is verified against specifications. 2. Interfaces Mechanical, optical, electrical and software interfaces are tested for compatibility with telescope. 3. Maintenance and operations Maintenance requirements and procedures are verified against observatory operations plan. User interfaces and maintenance tools are tested for completeness and usability. 4. Documentation Documentation is examined for quality and completeness.


Lab Acceptance Test


5. Requirements review

5.1. [RD1] 680a020d AGW units Technical Specification The document is still in draft version, and has not yet been released. It was agreed that the document needs revision and release of version 1.0. It was noted that the maximum weight for the complete AGW unit is specified to 400 Kg on page 15, which is inconsistent with [RD2]. The actual weight of the AGw unit (without on-axis sensor) is 420 Kg. AI 1: Update and release Technical Requirements document

5.2. [RD2] 680a010c AGW units Functional Requirements The document is still in draft version, and has not yet been released. It was agreed that the document needs revision and release of version 1.0. AI 2: Update and release Functional Requirements document

5.3. [RD4] Contract #AO101, “Telescope Acquisition, Guide and Wavefront Units”

[RD4] was reviewed, in particular Attachment A “Scope of Work”. It was noted that the required implementation of an on-axis tip-tilt sensor (Section 2) has not been included in the design. It has been decided that the on-axis wavefront sensor will fulfil this functionality, thus eliminating the requirement for a separate tip-tilt sensor. Section 5 calls out the use of VxWorks as operating system for the AGw control system. LBTO standards have since then changed, and the use of VxWorks is no longer recommended. The requirement is thus waived.


Lab Acceptance Test


6. System tests The tests sequence was based on the test plan “AGW Laboratory Test Plan” [RD3]. Test results are presented below.

6.1. Detectors Detectors functional test was carried out without problems. Single frames were read out and displayed. Detector performance is documented in a separate test report 682g540. AI 3: Finish and release AGW Detector Test report 682g540 It was noted that the current maximal frame rate for the guiding camera does not reach the specified 10 Hz. Conceivably this frame rate could be reached by trading off noise vs. readout speed. This is a long-standing issue that should be resolved as soon as possible. A 10 Hz read speed is technically feasible, but would require modification to the AzCam software. AI 4: Establish specification for guide camera noise and read-out speed. Detector noise measurements will be repeated after integration of the “W” unit in Arcetri. AIP staff will perform this measurement in Arcetri. AI 5: Schedule detector performance measurement in Arcetri. The following components need space allocation in the telescope treehouses (per AGw): Two PC boxes with Leach Controller board, total space required 4U in a 19” rack Keyboard and monitor in treehouse for Mike Lesser PC boxes maintenance One fibre connection per CCD from PC box (in treehouse) to AGW unit

Detector performance measurements were so far carried out at room temperature, and shall be verified at extreme ambient temperatures. AI 6: Verify detector performance at extreme ambient temperatures.


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6.2. Mechanics Extensive flexure tests were carried out in Potsdam on a telescope simulator, both with the AGw unit and the W unit in the AGW structure. Flexure test results were in specification and are documented in 680g301. AI 7: Update and release Flexure Test document 680g301

6.3. Optics At the time of testing, the optics were not aligned. For this reason, image quality could not be measured. The alignment procedure document was not yet completed. AI 8: Complete optical alignment procedure document AI 9: Complete and release Optics Test report An alignment tool (light source) has been designed at AIP. Two units will be manufactured, one of the two units will be shipped with the first AGW system to Arizona.

6.4. Software The AGw low-level software was used to operate the AGw during the acceptance test, and it worked flawlessly and appeared to be stable. The interface to the higher layers of software (GCS package produced in Heidelberg) is documented in an API specification document. It is expected that the low-level software package is ready in early 2006. AI 10: Update and release API description document Auxiliary tools (configuration, setup und diagnostic tools) are expected to be ready before the end of 2005.


Lab Acceptance Test


6.5. Thermal performance Given its location close the telescope optical beam, the AGW unit thermal performance is very critical. AIP has performed extensive thermal performance testing of the complete AGw unit in a climate chamber. This AIP laboratory facility is very impressive and extremely useful for this type of tests. The requirement is called out in 562s002: no surface shall be more than one degree C above ambient air temperature. At this point, the AGw unit is very close to meeting requirements, and it is expected that some adjustments to the thermal insulation will solve the problem. Schedule permitting, it is considered very important to use the Potsdam climate chamber also for thermal testing of the “W” unit. AI 11: Improve thermal insulation of electronics box AI 12: Finish and release thermal performance test report

6.6. Hot swap test For this test, random spare parts are selected and exchanged with the running parts. The purpose of the test is to verify that spare parts are functional, and correctly configured. “Encoder Stepper” board exchanged: First attempt to home filter wheel after

board replacement failed. Failure disappeared at second attempt and could not be reproduced.

“48I/O” board replaced with spare board without problems.

Note: Terminal server needs to be configured after replacement. A configuration tool will be provided by AIP. Note: LBTPO to provide UMAC Windows tools on Mt Graham for CPU board configuration.


Lab Acceptance Test


6.7. Handling device The following handling tools will be delivered with the first AGW unit to Mt. Graham (1 each): Crane lifting tool Handling cart

Both tools were inspected and found to be well suited for their purpose.

6.8. Interfaces

6.8.1. Mechanical Interface The AGW mechanical interface was checked against the bent Gregorian rotator flange drawing 671s005a. A discrepancy was identified (rotator gear ring inner diameter), which was resolved by updating 671s005. No further issues were identified. Weight: including crab structure but without on-axis unit 420 Kg.

6.8.2. Electrical Interface Tests were performed with a 115VAC/50Hz transformer supply. Complete AGw has auto range 120/230VAC. Power consumption at 232VAC (measured on step-down transformer primary side) = 320W with CCD controllers reading out, UMAC and motors running. Idle power 260W (no motors running, CCD controller on but idle). It was noted that remote power switching is currently not possible. Remote power switching is a new requirement from LBTO. AI 13: AIP to submit proposal for electrical stand-by mode implementation.


Lab Acceptance Test


6.8.3. Cooling Liquid Calculated coolant flow requirement at 1500W using the allowed 2.5 degrees ∆T is 8 L/min. The AGW UMAC needs 3 L/min at ∆T=0.2C. To this we must add AGW CCD cameras and Off-axis unit.

Figure 1: AGW Interface panel with Cooling, Power, Compressed air and Network connections

Cooling liquid flow is currently not monitored. Coolant pressure is monitored, and a pressure loss will automatically shut down the AGw electronics to prevent overheating. A flow sensor is considered to be more reliable, and could possibly be implemented. The complete cooling system including the “W” unit plumbing shall be pressure tested before shipping to Mt. Graham. AI 23: Investigate implementation of a cooling liquid flow sensor. AI 24: Pressure test of complete AGW unit


Lab Acceptance Test


6.8.4. Compressed Air Required air pressure = 6 bar. There is currently no pressure sensor available for air pressure loss detection. If air pressure would fail, motor brakes could not close. Loss of motor precision will be the consequence. AI 14: Potsdam to investigate implementation of air pressure sensor.

6.8.5. Ethernet Communication and network connects through 3 duplex ST bayonet connectors for instrument control (1x) and detector controller (2x). See also Figure 1.

6.8.6. Optical Interface Since optical alignment was not yet done at the time of testing, it was not possible to verify the optical interface. This will be verified during optical alignment, which will be done as soon as possible. For alignment purposes, the calibration unit can be adjusted to simulate the telescope beam. AI 15: Verify optical interface


Lab Acceptance Test


6.9. General inspection AGw Unit #1 was inspected for general workmanship, surface treatments, accessibility, and completeness. The unit appeared to be very well built. Electrical cabling and cooling plumbing is well laid out and professionally installed. It was noted that the cover plates on the outer side of the aluminium structure were not yet installed. Further, the electrical interface to the “W” unit (connector panel) has not yet been designed. Optical filters are available in Potsdam, but are not yet installed in filter wheel. Identification labels are missing, and cables and connectors shall be clearly identified. AI 16: Install cover plates AI 17: Define electrical interface and connectors to “W” unit AI 18: Install filters in filter wheel AI 19: Connectors and cables identification labels AI 20: AGW unit identification (unit ID) label AI 21: Cold plates surface treatment not yet complete


Lab Acceptance Test


7. Test Results This section reports results from tests performed during the Lab Acceptance Test. Except where explicitly mentioned, tests were carried out at room temperature (24 degrees C) in a Potsdam laboratory.

7.1. Start-up procedure Cold start test: The unit is powered on from shut-down state.

Result: The unit is immediately ready (less than one second). Homing sequence: Time is measured for homing all axes after power-up.

Result: All four axes are homed in 40 seconds.


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7.2. Moving Functions Positioning Time Test case: move function by relevant offsets, record elapsed time including brake release and activation cycle.

7.2.1. X-axis 17 arcsec (on sky) move: 4 seconds 5 arcmin (on sky) move: 10 seconds End-to-end: 11 seconds

7.2.2. Theta-axis End-to-end: 15 seconds

7.2.3. Combined X and Theta X and Y-axis interpolated move from end to end (diagonally): 15 seconds

7.2.4. Filter wheel 1 filter position move: 5 seconds 2 filter positions move: 8 seconds

7.2.5. Focus 50% of focus range: 9 seconds 100% of focus range: 12 seconds


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7.3. Relative positioning accuracy Test case: Move motor to reference position. Offset motor by few mm, then go back to reference position. Note position as measured on external gauge, repeat five times.

Figure 2. Measuring X-axis repeatability. Other measurements were similar.

7.3.1. X-axis Measured at pick-up mirror: 5 times test: 1,1,1,0,1 um Result Requirement Pass/Fail 1 um 60um = 0.1 arcsec Pass


Lab Acceptance Test


7.3.2. Theta-axis Measured at pick-up mirror: 5 times test 10, 9, 8, 8,7 um Result Requirement Pass/Fail 3 um 60um = 0.1 arcsec Pass

7.3.3. Focus stage Measured on filter wheel mirror: 5 times test 0,0,0,0,0 um Result Requirement Pass/Fail 0 um 375 um Pass


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7.4. Absolute positioning accuracy Test case: Execute motor homing procedure. Move motor to reference position. Note position as measured on external gauge, repeat five times.

7.4.1. X-axis Measured at pick-up mirror: 5 times test 0,0,0,0,0 um Result Requirement Pass/Fail 0 um 60um = 0.1 arcsec Pass

7.4.2. Theta-axis N/A, this axis has absolute encoder, result same as in section 7.3.2

7.4.3. Focus stage Measured on filter wheel mirror: 5 times test 0,0,0,0,0 um Result Requirement Pass/Fail 0 um 375 um Pass


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7.5. Reproducibility at varying gravity vector Test case: Move X and Theta axes to reference position. Read external dial gauge. Offset axes by relevant distance. Move back to reference position, read gauge. Repeat five times. Repeat test at three AGW rotator positions: 0, +60 and -60 degrees.

7.5.1. X-axis Measured at pick-up mirror. AGW position Measurement Result Requirement 0 degrees 2,3,3,4,4 um 2 um 60 um +60 degrees -37,-37,-36,-36,-36 um 1 um 60 um -60 degrees –26,-25,-24,-23,-22 um 4 um 60 um Note: The X-axis reference position (dial gauge measurement) appears to vary

significantly at different AGW positions, although the X-axis encoder position was the same. The AGW was rotated several times, and the displacement (dial gauge measurement) repeated well at the three AGW positions. This could conceivably be flexure in the measurement setup, but still requires follow-up measurements, see below. The observation is inconsistent with results from Flexure test report 680g301 where no excessive flexure was reported.


Lab Acceptance Test


7.5.2. Theta-axis Measured at pick-up mirror. AGW position Measurement Result Requirement 0 degrees 1,2,2,2,3 um 2 um 60 um +60 degrees 149,153,180,175,183 um 34 um 60 um -60 degrees –135,-166,169,-171,-173,-174

um 39 um 60 um

Note: Apparently the Theta axis performs excellent at 0 degrees, but marginally meets

spec at +60 and -60 degrees. The reason for this is unclear. The Theta-axis reference position (dial gauge measurement) appears to vary

significantly at different AGW positions, although the Theta-axis encoder position was stable. The AGW was rotated several times, and the displacement (dial gauge measurement) repeated well at the three AGW positions. This could conceivably be flexure in the measurement setup, but still requires follow-up measurements, see below. The observation is inconsistent with results from Flexure test report 680g301 where no excessive flexure was reported. It is recommended to use an optical test method in order to eliminate potential measurement error.

AI 25: Verify X-axis and Theta axis flexure after optical alignment.


Lab Acceptance Test


7.6. Probe motion range

7.6.1. X-axis Test case: Verify positioning range of pick-up mirror relative to AGW optical axis Requirement in X (pick-up mirror center relative to OA): Patrol range 0 to –182mm, Verified range +20mm to –160 mm. AI 26: AIP to investigate 20mm mechanical offset in X, propose solutions.

7.6.2. Theta-axis Test case: Verify positioning range of pick-up mirror relative to AGW optical axis Requirement in Theta +/- 18 degrees, verified –15.8 to +17.0 degrees. AI 27: Potsdam to investigate ways to increase motion range in Theta

7.7. Ambient sensors Test case: Read out humidity and temperature sensors, compare with external reference sensors.

7.7.1. Temperature sensor Sensor is located on a circuit board in the UMAC crate. Result: 35.5 degrees C, reference sensor reading: 33.2 degrees C

7.7.2. Humidity sensor Sensor is located on a circuit board in the UMAC crate. Result: 28.4% RH, reference sensor reading: 27.6% RH


Lab Acceptance Test


7.8. Cold Test Test case: Place AGw unit in the climate chamber, cool down unit and verify functionality of motorized functions. After two hours, the chamber ambient temperature was at -5C and the AGw internal temperature sensor measured -4.4C. The first attempt to exercise motorised functions failed after some time with a stalled focus motor. The focus motor speed was reduced, and the motor appeared to work fine again. After three hours in the cold chamber the temperature was at -8C. The focus motor stalled again. Its speed was again reduced (to 5 mm/sec); this got the motor working again. It is currently not possible to measure motor current in order to understand motor torque headroom. We are apparently working close to the torque limit of the focus motor. This might lead to problems in the future, with increased friction due to aging and contamination of the linear stage. This may also be the case for the other moving functions. AI 28: Measure motor current for all motors AI 29: Investigate solution for focus motor stalling problem


Lab Acceptance Test


8. Shipping/Schedule The following schedule milestones apply to AGw #1: October 2005: AGw #1 to Arcetri February 2006: Lab Acceptance test of “W” #1 in AGW #1 (Arcetri)

9. Deliverables Two Lucifer AGW units Handling tool Spare parts according to list Documentation according to list Detectors with controllers and rack mountable PC boxes Software: GCS package (Heidelberg), Off-axis control software, Diagnostic and

Setup software, AzCam package Handling cart Calibration tool Transport box


Lab Acceptance Test


10. Documentation The following documentation package shall be delivered before delivery to Arizona, with the exception of item #2 (test reports), that shall be supplied before Lab Acceptance can be granted. Shipping and Handling document (item #5) is required before shipping AGw unit #1 to Arcetri. # Document Notes Responsible 1 Drawings and Diagrams AIP 2 Test reports See also Action Item list AIP 3 GCS Operations Manual MPIA 4 Maintenance Manual AIP 5 Shipping and Handling AIP and Arcetri 6 Spare parts list AIP 7 Calibration and alignment plan AIP AI 30: Release Test Reports (#2) and Shipping and Handling manual (#5) ASAP. AI 31: Release documentation items 1, 3, 4, 6, 7 before shipping to Mt Graham.


Lab Acceptance Test


11. Action Items The following abbreviations are used for completion dates of action items: LAT: Requires closure before Lab Acceptance is granted SAC: Shall be closed before shipping to Arcetri SAZ: Shall be closed before shipping to Arizona

AI # Origin Description Resp. Date Status

1 5.1 Update and release Technical Requirements document 680a020 [RD1]

AIP LAT Closed

2 5.2 Update and release Functional Requirements document 680a010 [RD2]

AIP LAT Closed

3 6.1 Finish and release AGW Detector Test report 682g540

AIP SAZ Open

4 6.1 Establish specification for guide camera noise and read-out speed.

AIP SAZ Open

5 6.1 Schedule detector performance measurement in Arcetri.

AIP LAT Open

6 6.1 Verify detector performance at extreme ambient temperatures.

AIP LAT Open

7 6.2 Update and release AGW-1 Flexure Test document 680g103

AIP LAT Open

8 6.3 Complete optical alignment procedure document

AIP LAT Open

9 6.3 Complete and release AGW-1 Optics Test report

AIP LAT Open

10 6.4 Update and release API description document

AIP SAZ Open

11 6.5 Improve thermal insulation of electronics box

AIP LAT Open

12 6.5 Finish and release AGW-1 thermal performance test report

AIP LAT Open

13 6.8.2 AIP to submit proposal for electrical stand-by mode implementation.

AIP SAC Open

14 6.8.4 Potsdam to investigate implementation of air pressure sensor.

AIP SAC Open

15 6.8.6 Verify optical interface AIP LAT Open 16 6.9 Install cover plates AIP SAC Open 17 6.9 Define electrical interface and connectors to

“W” unit AIP SAC Open

18 6.9 Install filters in filter wheel AIP SAC Open


Lab Acceptance Test


19 6.9 Connectors and cables identification labels AIP SAC Open 20 6.9 AGW unit identification (unit ID) label AIP SAC Open 21 6.9 Cold plates surface treatment not yet

complete AIP SAC Open

23 6.8.3 Investigate implementation of a cooling liquid flow sensor.

AIP SAZ Open

24 6.8.3 Pressure test of complete AGW unit AIP SAZ Open 25 7.5.2 Verify X-axis and Theta axis flexure after

optical alignment. AIP LAT Open

26 7.6.1 AIP to investigate 20mm mechanical offset in X, propose solutions.

AIP LAT Open

27 7.6.2 Potsdam to investigate ways to increase motion range in Theta

AIP LAT Open

28 7.8 Measure motor current for all motors AIP LAT Open 29 7.8 Investigate solution for focus motor stalling

problem AIP LAT Open

30 10 Release Test Reports (#2) and Shipping and Handling manual (#5) ASAP.

AIP SAC Open

31 10 Release documentation items 1, 3, 4, 6, 7 before shipping to Mt Graham.

AIP SAZ Open


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--oOo--


Lab Acceptance Test


Doc_info_start Title: LBT Agw #1 Lab Acceptance Test Report Document Type: Test Report Source: LBT Project Office Issued by: Joar Brynnel Date_of_Issue: 1-Aug-2005 Revised by: Date_of_Revision: Checked by: Date_of_Check: Accepted by: Date_of_Acceptance: Released by: Date_of_Release: File Type: MS Word Local Name: LBT Agw #1 Lab Acceptance Test Report Category: 600 Telescope Auxiliaries Sub-Category: 680 Acquisition & Guiding Assembly: 680 AGW Units General Sub-Assembly: Part Name: CAN Designation: 680s001 Revision: B Doc_info_end