Kipp & Zonen BREWER MK IV Instruction Manual Download Page 16

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16-10-200716-10-2007

MKIV OPERATOR’S MANUAL

Specifications of the Zenith Motor:

Resolution:

±0.13

Accuracy (24 hours):

± 0.25

Angular range:

270

Table 2.2 Optical Components of Brewer Spectrophotometer

Identification

Description

AP 1

Fixed aperture, 11.18 mm

ES 1

Entrance slit plate, dia: 26.37 mm, thk: 0.10 mm

Slit, length: 3.30 mm, width: 0.34 mm.

EX 1

Exit slit plate, length: 28.95 mm, width: 19.05 mm, thk: 0.10 mm

Slits, length: 5.08 mm, width(3): 0.589 mm, width(3): 0.632 mm.

FW 1

Filterwheel #1 made from aluminum gear material, with two

Ground G1-quartz disks, dia: 25.4 mm, width: 1.59 mm, and 2 film
Polarizers, dia: 25.4 mm, width: 1.59 mm.

FW 2

Filterwheel #2, made from aluminum gear material with 5

Neutral-density filters; each with dia: 25.4 mm,
Width: 1.59 mm; attenuations: 0.5, 1.0, 2.0, 2.5 decades

(prepared from G1 quartz blanks )

FW 3

Filter Wheel #3, made from aluminum gear material with with 4, 25mm
filter positions. Contains a UG-11 filter, a BG-12 filter and a UG-11/NiSO

filter combination

GR 1

Grating, 1200 line/mm holographic plane reflectance,
dia: 50 mm, thickness: 10 mm (Jobin-Yvon)

HL 1

Tungsten-halogen lamp, 12 V, 20 W, Osram 64425, mounting:
Amel Socket for #28-8341 light source

IR 1

Iris diaphragm, aperture range: 2 to 12 mm (Edmund Scientific
catalogue #40997)

LE 1

Lens, double-convex, G1-quartz, focal length: 25.4 mm, dia: 25.4 mm

LE 2

Lens, plano-convex, G1-quartz, focal length: 76.2 mm, dia: 25.4 mm

LE 3

Lens, plano-convex, G1-quartz focal length: 50.8 mm, dia: 25.4 mm

LE 4

Lens, plano-convex, G1-quartz, focal length: 76.2 mm, dia: 25.4 mm

LE 5,6

Correction lens G1 quartz, dia: 25.4 mm, radius 1: 170.0 mm,
convex cylindrical, radius 2: 230.0 mm, concave spherical,
coating: magnesium fluoride

LE 7

Fabry lens, double-convex, G1 quartz, dia: 38.1 mm focal length: 38.1 mm

MI 1

Micrometer, metric, Starrett #463 MP,13-mm head, EDP #52444

ML 1

Mercury lamp, ozone-producing, General Electric G4S11;
mounting: 14-71 intermediate screwsocket

PM 1

Photomultiplier, EMI #9789QB05

QW 1

Quartz window, G1 quality 7.62 by 15.24 by 0.48 cm

SL 1

Slit mask, cylindrical sector, dia: 25.4 mm, thickness: 0.038mm

Spherical mirror, radius: 324 mm, ground from pyrex blank of

dimensions 25.4 by 165.1 by 50.8 mm, aluminized reflecting

surface, coated with magnesium fluoride

VL 1

Viewing lens, plano-convex, glass. Dia: 15 mm, focal length: 112 mm

VP 1,2

Viewing prism, right-angle, glass 7 by 8 by 7 mm

ZP 1

Zenith prism, right-angle, G1-quartz, 31.75- by 31.75-mm square face

2. SYSTEM DESCRIPTION

Summary of Contents for BREWER MK IV

Page 1: ...INSTRUCTION MANUAL OM BA C230 B Mk IV...

Page 2: ...REVISION HISTORY REV DESCRIPTION DCN DATE APPD B Update 99 16 12 C Update 07 16 10...

Page 3: ...ii...

Page 4: ...expressed or implied and includes without limitations any implied warranty of merchantability or fitness for a particular purpose and of any other obligations of liabilities whatsoever in any event fo...

Page 5: ...2...

Page 6: ...rior 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...

Page 7: ...4...

Page 8: ...N MENU COMPUTER DISPLAY 30 3 9 INITIAL TESTS 30 3 10 FINAL INSTALLATION 31 4 BREWER COMMANDS 33 4 1 RESERVED KEYS Home Del Ctrl Break 33 4 2 BREWER COMMAND SUMMARY 33 5 ROUTINE OPERATIONS and MINOR MA...

Page 9: ...Azimuth Tracker Steps per Revolution Calibration 104 Stray Light Measurement 104 Thermal Tests 105 APPENDIX G PRELIMINARY DATA REDUCTION 107 Converting Raw Counts to Light Intensity 107 Converting Ra...

Page 10: ...pheric sulphur dioxide and nitrogen dioxide are closely associated with the acid rain phenomenon which like ozone depletion has implications for the global environment Today s concern over the vulnera...

Page 11: ...on In both the manual and semi automated modes the operator initiates a specific observation or instrument test by typing a simple command on the Computer keyboard Raw data is automatically recorded o...

Page 12: ...ntinuous outdoor operation and is therefore housed in a durable weatherproof shell which protects the finely tuned internal components The instrument operates reliably and accurately over a wide range...

Page 13: ...perature range Precision 0 006 0 002 nm Measurement range 286 5 nm to 363 0 nm in UV 420 nm to 510 nm in visible Exit slit mask cycling 0 12 sec slit 1 6 sec for full cycle O3 Measurement accuracy 1 f...

Page 14: ...nd provide a protective finish Mounted inside the Spectrophotometer is a cannister of desiccant which is designed to remove moisture from the air as the Brewer breathes with changes in temperature fro...

Page 15: ...h Prism Targets Table 2 3 Spectrometer Targets for Various Zenith Angles Zenith angle Object viewed by Spectrometer 0 to 90 Sky or sun 180 Calibration lamps 90 UV diffuser The prism is mounted in a re...

Page 16: ...m 64425 mounting Amel Socket for 28 8341 light source IR 1 Iris diaphragm aperture range 2 to 12 mm Edmund Scientific catalogue 40997 LE 1 Lens double convex G1 quartz focal length 25 4 mm dia 25 4 mm...

Page 17: ...onditions is stable to within 5 The filament of the lamp is placed at the focal point of a double convex lens LE 1 so that the light from the lamp is directed along the optical axis by the zenith pris...

Page 18: ...A mercury lamp provides a line source for wavelength calibration of the spectrometer while a quartz halogen lamp provides a well regulated light source so that the relative spectral response of the sp...

Page 19: ...0 0 5 1 0 1 5 2 0 and 2 5 attenuation 0 through 5 This filterwheel is used to automatically adjust the light level entering the spectrometer AP 1 an 11 18mm fixed aperture located on the spectrometer...

Page 20: ...unted in the entrance slit housing at an angle of 29 to the optical axis with the concave spherical surface facing the entrance slit The axis of the cylindrical surface is positioned in the horizontal...

Page 21: ...indrical mask which may be located in one of eight positions Six of the eight positions allow light to enter one of the six exit slits The second mask position blocks light from all slits so that a da...

Page 22: ...e Fabry lens and also insulates the magnetic shield from the PMT housing The housing has been designed to allow access to the photon amplifying and discriminating circuitry without disturbing the opti...

Page 23: ...indicate the level of the high voltage and has an electrically adjustable potentiometer to allow for automated high voltage testing ULTRA VIOLET DOME ASSEMBLY Refer to Figure 2 3 The UV Dome Assembly...

Page 24: ...m with tripod 45 7 cm 18 inch without tripod Power requirements 120 V AC 60 Hz 0 5 A 240 V AC 50 Hz 0 25 A 2 3 COMPUTER EQUIPMENT With the many different Computers available on the world market it is...

Page 25: ...MKIV OPERATOR S MANUAL 22...

Page 26: ...rewer will first be set up and tested in close proximity to the Computer and then it will be installed at its final location Before starting ensure that correct AC voltage is availabe as per the diagr...

Page 27: ...MKIV OPERATOR S MANUAL 24 Figure 3 2 Brewer Equipment Setup Figure 3 3 Brewer Spectrophotometer Tracker Tripod...

Page 28: ...rn off the Brewer Power Switch and disconnect the power cable 3 2 TRIPOD UNPACKING AND SETUP Refer to Figure 3 6 1 Open the Tripod crate and locate the following Tripod Stand Tripod tie down kit this...

Page 29: ...rn the Tracker Power Switch OFF 3 4 MOUNTING THE BREWER Refer to Figure 3 3 1 Place the Brewer on top of the Tracker The Brewer Power Switch should be directly above the Tracker Power Switch and the t...

Page 30: ...the instrument BDATA NNN these files contain firmware and software configuration information specific to the Brewer whose Number NNN appears on the Disk identifier as well as the utility used to load...

Page 31: ...DOS prompt at this point activity will appear on the computer screen but for this test only the lights on the Data Set need to be monitored the power indicator will remain on and in less than a minute...

Page 32: ...At this point the Brewer Main Menu will appear on the Computer Screen and the Software will be ready to accept Commands as seen by the blinking cursor to the right of the prompt cm See Figure 3 5 This...

Page 33: ...n assuming Date Time and site Co ordinates are correct It is not of major concern if the Brewer is not pointing accurately at this time as some other parameters may still need adjustment Note the newl...

Page 34: ...he tests marked with those in the FINAL TEST RECORD and consult KIPP ZONEN if there are any discrepancies or problems noted in the tests 3 10 FINAL INSTALLATION If the results of the initial tests are...

Page 35: ...en the Tracker is level mount the Brewer and interconnect all of the cables between the Computer the Tracker and the Brewer 12 In order for the Surge Suppressor circuitry to be effective the Brewer Sy...

Page 36: ...ressed Break in xxxxx OK will be seen there will be full access not only to all GW BASIC commands but also to the Brewer Program itself There are a number of ways to restart the Brewer program followi...

Page 37: ...nd AZ Azimuth Tracker Zeroing The AZ command causes the Azimuth Tracker to return to its zero reference North position and then move the Brewer to the solar azimuth as calculated by the Ephemeris acco...

Page 38: ...s is 20 The CY command may be used to increase or decrease this number if better statistics or a faster measurement with degraded statistics is desired This command requires operator input CZ Custom S...

Page 39: ...nditions FW 2 has initially been set to a low attenuation value and clouds suddenly move out of the field of view A DS measurement takes slightly approximately 2 5 minutes to complete Details of the d...

Page 40: ...r See ED ED PD commands END_DAY End of Day past day Command Syntax END_DAY Feb29 98 or END_DAY 06098 END_Day performs an End of Day on a previous day s data For the command syntax example if the raw d...

Page 41: ...o give a more accurate measure of the direct radiation before the Ozone determination is made This method will give reasonably accurate O3 values to ZA of 85 Air Mass 8 2 as compared to the DS which h...

Page 42: ...d displays a list of some of the known locations of Brewers throughout the world The geographical co ordinates of the current site may be entered and or modified LL Location Update The LL command allo...

Page 43: ...also PD PF PO Printout Instrument Constants PO generates a printout of selected instrument constants PZ Point to Zenith PZ results in the Zenith Prism being pointed to a Zenith angle of 0 straight upw...

Page 44: ...ommands is executed at the corresponding solar zenith angle The SA command is useful for converting GMT to solar angle See Section 8 for more information on designing schedules See also the SK and SKC...

Page 45: ...on 0 See also Appendix F for details on the test SLSUM Standard Lamp Summary SLSUM reads the daily Data B file and prints out the summary results of the day s SL tests In addition entries are made in...

Page 46: ...llow a line to be retyped See Appendix H for more explanation on the TeleType feature TU Test UV Port Alignment TU uses an external quartz halogen lamp mounted over the UV dome to find the zenith moto...

Page 47: ...d irradiance is computed and sent to the printer and written to the DUVJJJYY nnn data file See Appendix A UL UV Lamp Scan UL is a test command that results in a UV scan being performed with a Lamp rat...

Page 48: ...e also Appendix A ZB ZC ZS Zenith Sky Observations ZB ZC and ZS are variations of the same command and are used when sky conditions are known and it is desirable to keep the observations separated ZB...

Page 49: ...ky Summary ZSSUM prints out a calculation of the stratospheric and tropospheric amounts of NO2 in m atmosphere cm Dobson Units for morning and evening twilight periods if measurement data is available...

Page 50: ...a Scheduled operation Outside Tasks 1 Check that the Tracker is pointing toward the Sun toward the Moon or perpendicular to the sun depending on the measurement in progress 2 Check that the Tracker Po...

Page 51: ...onds of GMT for proper tracking adjusted with TI 14 Software Version 374f the Version number of the Brewer Software 15 Zenith Angle 45 76 the current Solar Zenith Angle 16 Communication Activity in ou...

Page 52: ...printout or D file if PD is used in ED and check especially the diagnostic tests and summary data 1 HG SUMMARY There should be no errors printed which might indicate a Micrometer positioning problems...

Page 53: ...ected or thought it detected If the errors persist then KIPP ZONEN should be consulted for advice 9 OBSERVATION DATA Data file summaries should be inspected to ensure that they are present and data sh...

Page 54: ...placed beneath the Brewer Viewing Window should be inspected regularly If the 40 indicator starts to turn Pink the moisture is approaching the danger level If either of the two potentially dangerous c...

Page 55: ...lt to turn Applying a few drops of light oil periodically will help to prevent this annoyance Levelling Feet In very moist climates the adjusting mechanism on the Tripod legs can become rusted making...

Page 56: ...p Assembly The Lamp and its socket can then be slid forward toward the PMT and the new lamp installed Great care must be taken not to touch the new lamp When replacing the lamp and socket observe that...

Page 57: ...MKIV OPERATOR S MANUAL 54...

Page 58: ...ber Vertical repeatability is achieved by positioning the lamp filament on exactly the same axis as that defined by the two sight holes on each side of the lamp shield This axis represents 5cm from th...

Page 59: ...b1qshg and press Enter pn turns on the printer b1 turns on the HG lamp qs initiates a Quick Scan of the UV lamp hg does a mercury line wavelength calibration 4 When prompted to do so enter the followi...

Page 60: ...g the odd reading should be noted and not used again 2 Once every two months all five lamps should be scanned to make sure they all give the same results so availability of spares is assured 3 In the...

Page 61: ...MKIV OPERATOR S MANUAL 58...

Page 62: ...Menu issue the command sequence PNSRSI PN turns on the printer SR zeros and resets the Tracker SI puts the software into the Siting Mode the default mode enables the controls on the Brewer 2 Being ca...

Page 63: ...on another If it is found that the North Correction numbers alternate between higher and lower numbers consistently from morning to afternoon then this is an indication that the levelling is not accur...

Page 64: ...Schedule names follow DOS rules and automatically are given the SKD extension An ED is invoked automatically at solar midnight by the SKC routine so an additional ED need not be programmed into the sc...

Page 65: ...e From the Brewer main menu send the Command SE a table will appear on the screen with two columns one for SZA and one for the commands to be executed at the SZA starting with the first SZA after sola...

Page 66: ...wer supply stability 1 2 3 4 08591 1566 80 5 17 1 61 08691 1555 86 5 17 1 61 1 Julian Day jjjyy 2 H T voltage 3 5V 4 standard lamp current Note For reasons that are not known data is sometimes written...

Page 67: ...9 0 9 9 55 190 14 332 6 0 8 25 3 6 8 2 5 556 12 1 Julian day 2 DS ozone 10 FZ ozone 3 Standard deviation 11 Standard deviation 4 DS SO2 12 FZ SO2 5 Standard deviation 13 Standard Deviation 6 Good Obse...

Page 68: ...meter 1 offset constant from the ICF file 6 Filter Wheel 3 steps from operating position to zero sensor often not printed 7 Filter Wheel 3 offset constant from the ICF file often not printed NONAVG nn...

Page 69: ...ly average ozone measurements collected by the Brewer 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 08398 452 1 2 4 0 6 0 6 16 29 185 20 445 2 5 2 12 3 26 4 19 22 199 19 08498 472 8 2 1 08 1 2 22 35 185 19 465...

Page 70: ...2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 26499 26 37 5 62469 62615 63034 62891 62659 327 630660 91 93 95 97 89 2 13466 26599 25 33 3 62522 62666 63085 62941 62708 328 638153 47 54 51 54 52 2 7730 1...

Page 71: ...ption of the format of each B file section Data Header B file Each B file begins with a data header Example Name Version 2 B file version number Dh Header 25 Day 11 Month 98 Year Saskatoon location na...

Page 72: ...9 11 dark count 10 13879 raw counts wavelength 1 11 345676 raw counts wavelength 2 12 437926 raw counts wavelength 3 13 728264 raw counts wavelength 4 14 805262 raw counts wavelength 5 15 rat ratio h...

Page 73: ...et to this step 190255 Peak intensity of the HG scan 28 Temperature deg C Correlation Value The correlation between the stored and measured spectra Calculated Micrometer Step number The micrometer pos...

Page 74: ...3 standard deviation of single ratio 2 21 4 standard deviation of single ratio 3 22 4 standard deviation of single ratio 4 23 13 standard deviation of double ratio 1 24 8 standard deviation of double...

Page 75: ...e file is appended each time a CZ command is issued during the day The format of the CZ file is clearly defined in the file itself D FILES DJJJYY NNN D or Disk files are produced when the PD command h...

Page 76: ...ader for each scan includes date starting time hour ending time hour zenith angle latitude longitude location name instrument and measurement type Row 2 column 1 GMT time in minutes column 2 Wavelengt...

Page 77: ...Temperature volts 12 Pr Pressure header 12 960 dark Pressure mb and dark count header 14 1 Dark count 15 825 9 Time GMT in minutes for 1st 16 2865 Wavelength for 1st 17 1263 Micrometer step for 1st 1...

Page 78: ...lament and Teflon diffuser 7 dh data header 8 15 Day 9 01 Month 10 99 Year 11 Saskatoon Location 12 52 108 Latitude 13 106 713 Longitude 14 3 43 PMT temperature Volts 15 pr Pressure header 16 960 Dark...

Page 79: ...05 59 for instrument number 173 Channel Name Value Value Lamps off Lamps on 0 PMT temp deg C 22 99 22 99 1 Fan temp deg C 22 04 21 95 2 Base temp deg C 23 56 23 56 3 H T voltage V 1490 97 1490 97 4 1...

Page 80: ...000 0 0000 0 0000 Disp Coeff 1 4262 953 4322 622 4378 356 4431 307 4485 325 4212 835 Disp Coeff 2 0 115634 0 114610 0 113330 0 112289 0 109845 0 116792 Disp Coeff 3 1 131E 6 1 166E 6 1 172E 6 1 204E 6...

Page 81: ...MKIV OPERATOR S MANUAL 78...

Page 82: ...mercury exit slit 17 0 07786144 slope for mercury exit slit 18 7 580347e 07 quadratic for mercury exit slit 19 4262 953 NO2 intercept for slit 1 20 0 1156343 NO2 slope for slit 1 21 1 130862e 06 NO2 q...

Page 83: ...uation 17 4440 Neutral density of filter 1 divide by 10 4 to get attenuation 18 10320 Neutral density of filter 2 divide by 10 4 to get attenuation 19 14120 Neutral density of filter 3 divide by 10 4...

Page 84: ...en in the OP_ST nnn file The middle column is the BASIC variable name used in the Brewer software to contain this value and the right column is a description of the value s meaning Sample SW Variable...

Page 85: ...0 0 8637 6 0 6760 0 3187 0 1490 0 0776 ozone coefficients for 039 STN TMO 7 3 6 11 12 1 1 0 812 0 8 999 1 34 838 0 9 0 debug file 1 4 Tables used in the calculation of Umkehr profiles 5 6 Ozone coeffi...

Page 86: ...xit slit 18 0774763 slope for mercury exit slit 19 7 259538E 07 quadratic for mercury exit slit 20 36 Not used UMKSETUP nnn Umkehr setup file Example 1 SXUNI4M DAT 2 STDTABS DAT 3 O3TABLE DAT 4 CQMS D...

Page 87: ...and ZS measurements over a wide range of mu and ozone values usually many months The values supplied in ZSFVAL nnn are for a Brewer 035 operating in Toronto Canada and should produce results which ar...

Page 88: ...cular scan For the most representative daily integral values it is recommended that UV scans be taken throughout the daylight hours at regular zenith angle intervals Histogram summation starts at the...

Page 89: ...nse values of more than 5 should prompt investigation into the discrepancy Statistics from the response calculations should give percent standard deviations of 1 5 to be considered acceptable Lamp Irr...

Page 90: ...irectory 4 Copy the UV files to be processed into the test directory 5 Run AB_UVDAT and follow the directions given Using RD_UX EXE RD_UX EXE is used to reduce the UV data produced by the UA UC UF UV...

Page 91: ...MKIV OPERATOR S MANUAL 88...

Page 92: ...ion a number of operations can be done Schedules can be written using SE and the solar angle information can be printed using SA Dates and time can be changed as can Site Information and Brewer number...

Page 93: ...MKIV OPERATOR S MANUAL 90...

Page 94: ...to have expertise in the area of Umkehr processing We will however endevour to provide whatever information we can to assist in the generation of ozone profiles for Brewer stations and the following d...

Page 95: ...sun angle information must be edited to include as line 7 the following 3 6 11 12 1 1 0 pressure where pressure is mean station pressure in millibars 4 The batch file RUNPRE BAT will invoke PREPRO EX...

Page 96: ...wing tests assume that the spectrometer is in focus and properly aligned in accordance with the Optical Frame Alignment document List of Brewer Factory Tests AZ Zero the Azimuth Tracker DT Photomultip...

Page 97: ...ZIMUTH ZEROED AT HH MM SS DISCREPANCY N N will usually be a small integer lying in the range 10 N 10 The Tracker stepper motor gearing is approximately 15000 steps per revolution so a discrepancy of 1...

Page 98: ...el 2 five measurements are taken at the higher intensity ten at the lower intensity Method The command DT is issued Following the usual five minute lamp warm up and a further 10 minutes for test to ru...

Page 99: ...s the correlation between the measured and stored spectra If this interpolated step number falls within the acceptance limits 147 00 149 99 the mercury spectrum is deemed to have been located and the...

Page 100: ...idity The sensor is buffered by an Op Amp and the output is connected to one of the analog input channels of the A D converter A temperature sensor is located near the humidity sensor to provide tempe...

Page 101: ...ommand and at the prompts enter the PMT number the preamp discriminator level the minimum maximum and incremental voltages for the test For the PMT serno and voltage settings see the Final Test Record...

Page 102: ...y 50 Volts or more from the orignial setting then it is desired to change the current setting See the HVSET explanation on how to adjust the high voltage WARNING Changing the high voltage for the phot...

Page 103: ...instrument dependent values A1 B1 A3 B2 for a particular instrument via the Inter Comparison Calibration procedure is outlined below Many simultaneous direct sun measurements at least 40 are made with...

Page 104: ...SH Normal operational ratios R1 R6 are printed out in the last two lines so that ratios in the dynamic RUN and static STOP modes can be compared SC Scan Test on Direct Sun The SC test determines the...

Page 105: ...test The program prompts for the minimum maximum and increment for trial values of the delay constant Typical values are a minimum value of 2 a maximum of 30 and an increment of 2 After a five minute...

Page 106: ...er Preliminary Data Reduction These raw counts are printed in the following format Brewer Temp 27 C 3 56 V C U T CY ZEN MU DRK 1 2 3 4 5 SL0 20 54 25 20 65 63 2 384 32 1102112 1052861 1066768 956627 8...

Page 107: ...The discrepancy between the saved value and the new value will be displayed If this value is greater then 20 steps the tracker s friction drive should be cleaned and the test should be repeated If the...

Page 108: ...nce is affected by temperature Measurements are made with the quartz halogen standard lamp Light intensity measurements are taken at a number of points which span the temperature range 10 to 50 C The...

Page 109: ...6 to 2 i T TC i i F F i 0 where F i are the scaled corrected count rates for slit positions 2 to 6 F0 i F i at 0 C TC i is the temperature response coeff for the i th operational wavelength T is the...

Page 110: ...tometer by transmitting appropriate command strings for example R 1 6 20 run the slitmask motor through positions 1 to 6 then back to position 1 accumulating the counts to six separate channels repeat...

Page 111: ...part of the temperature coefficient TCi are the wavelength dependent temperature coefficients read from the spectrophotometer s Constants File stored on disk TE is the instrument temperature in degree...

Page 112: ...ios MS 5 MS 6 MS 7 will be largely independent of SO2 effects Two higher order ratios are formed 7 4 8 2 3 MS MS MS 7 6 5 9 7 1 5 0 MS MS MS MS Both of these functions have weightings which remove the...

Page 113: ...ozone and the solar zenith angle The relation assumed has the following form sky F C X B X A 2 where 2 2 2 M c M b a A 2 2 2 M f M e d B 2 2 2 M k M h g C M2 is the path lengthening factor for the O3...

Page 114: ...ve ended when the first command in the set has ended even if other commands in the set are still executing Any commands which generate output transmit that output in accordance to the rules of the low...

Page 115: ...each output message 3 HVADJUST Adjusts the High Voltage power supply This command requires configuration variables Syntax HVADJUST delta Parameters Parameter response Format Meaning delta 128 to 127...

Page 116: ...el 1 is initialized 5 LOGENTRY Report the next entry in the log Syntax LOGENTRY Response A character string identifying a problem This string has the form YYYY DDD HH MM SS text where the text may be...

Page 117: ...This command requires configuration variables See the I command for examples Syntax M m s Parameters The m identifies the motor to move See the section on the I command for possible values The s defin...

Page 118: ...ommand requires configuration variables The configuration variable sets up the slit positions to correspond to a motor step position Syntax R p1 p2 p3 Parameters p1 may take values from 0 to 7 p2 take...

Page 119: ...wer In the above the R parameters had already been specified as 2 4 4 The new values returned correspond to a new run of the R command as specified 12 S Report the status of the most recent run comman...

Page 120: ...ys be immediately preceded by an I 2 command and followed by a STEPS query This command requires configuration variables Syntax STEPS Example I 2 Ensures that the motor or tracker position is accurate...

Page 121: ...echoing Examples V 120 The prompt after this command will be sent at 1200 baud V 960 1 The prompt after this command will be sent at 9600 baud and character echoing will be suppressed 18 CONFIGURATION...

Page 122: ...ation to be permitted MOTOR MAX JERK motorId Unsigned integer paces 256 tick 3 on reset maximum absolute value of motor acceleration to be permitted inside a time slice MOTOR MAX SEARCH motorId Signed...

Page 123: ...debounce time for the tracker control switches USE B3 FOR LAMPS Boolean immediate Sets response to command B 3 If set to YES lamps are turned on else the command is ignored VERSION ELEC unsigned byte...

Page 124: ...to force a warm restart of the Brewer BYTE X address ANSI C integer format Hex on output yes value of the relevant byte in external RAM BYTE F address ANSI C integer format Hex on output no reads val...

Page 125: ...e azimuth tracker SUPPLY VOLTAGE HIGH powerSupply volts yes supply voltage high watermark SUPPLY VOLTAGE LOW powerSupply volts yes supply voltage low watermark SUPPLY VALUE powerSupply volts no supply...

Page 126: ...lucent M 4 256 192 2 blocked aperture opaque M 4 192 128 3 clear aperture transparent M 4 128 64 4 quartz diffuser ND of f 2 0 translucent M 4 64 0 5 film polarizer vertical M 4 0 5 Filterwheel 2 0 0...

Page 127: ...MKIV OPERATOR S MANUAL 124...

Page 128: ...yyyy ddd hh mm ss identifies the time on the instrument clock at the time when the message was recorded The possible values of message part 1 are given below Usually there is only the message part 1...

Page 129: ...ables A command was issued which required configuration when no configuration was loaded The subsequent message indicates the command If the instrument is in Cosmac mode at the time it also responds i...

Page 130: ...should have removed the blocker from a reference sensor did not do so This could indicate a stuck motor or a motor driver problem If the error persists check the indicated motor if the motor is not s...

Page 131: ...the circumstances in which this message was generated Motor number Movement attempted with too large a velocity A Movement was attempted with a velocity larger then the maximum jerk specified in the B...

Page 132: ...pe The type of initialization that was actually performed This can be Warm Tepid or Cold The log is cleared unless this is Warm resetTime The last time read from the clock before the initialization st...

Page 133: ...MKIV OPERATOR S MANUAL 130...

Page 134: ...BrewCMDW does not work on MS DOS W95 or W89 systems To run the BrewCMD W utility the Brewer must be connected via the serial port of the PC The BrewCMD utility is intended for the use of the scientis...

Page 135: ...MKIV OPERATOR S MANUAL 132...

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