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Table 1. 1011C Connectors

Power Unit

Power In

PTO2E8 – 3P

Data Out

PTO2E12 – 10S

Sensor

PTO2E20 – 16S

Control Indicator

PTO2E14 – 18S

Serial Out

9 pin D-sub

Control Indicator

PTO2E14 – 18P

Cables

Sensor

PTO6E20 – 16P – SR

PTO6E14 – 19S – SR

Data

PTO6E12 – 10P – SR

Power

PTO6E8 – 3S – SR

Control Indicator

PTO6E14 – 18P – SR

PTO6E14 – 18S – SR

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Содержание 1011C

Страница 1: ...MODEL 1011C HYGROMETER OPERATING MANUAL December 2008 BUCK RESEARCH INSTRUMENTS LLC PO Box 19498 Boulder CO 80308 Copyright 2008 Buck Research Instruments LLC All rights reserved...

Страница 2: ...N p 18 3 1 Unpacking Procedure 3 2 Initial Operation Check 3 3 Installation on Aircraft 3 4 Leak Check 3 5 Pressure Within Sensor 3 6 Cabling 4 0 OPERATING INSTRUCTIONS p 24 4 1 Initial Setup 4 2 Syst...

Страница 3: ...ensing Unit Mounting and Assembly p 20 8 Sensing Unit Internal p 22 9 Flow Test Fixture Hookup p 23 10 System Response Characteristics p 28 Appendix Figures 11 1011C Wiring Diagrams p 31 2 12 Water Va...

Страница 4: ...Title 1 1011C Connectors p 39 2 Dew Point to Frost Point Conversions p 40 3 Dew Point Error Due to Pressure Change in Sampling System p 41 APPENDIXES 1 1011C Pin Out p 30 2 Humidity Conversion Equati...

Страница 5: ...1011C The 1011C features a microcontroller based Power unit It features both voltage and 9600 baud RS 232 serial data outputs Optionally it includes a power switch and a pressure sensor input The Cont...

Страница 6: ...les for water and acetone cotton swabs and spare gaskets and o rings Unlike the 1011B the 1011C does not come with a calibration plug This is because the 1011C uses an ultra stable thermistor instead...

Страница 7: ...7 C B A Figure 1 Dew Point Hygrometer System shown with optional cables...

Страница 8: ...max Operating Limits Operating temperature range Sensing Unit 80 to 60 C Control Indicator Unit 40 to 60 C Power unit 40 to 60 C Airspeed nominal 450 knots Altitude nominal 45 000 feet Pressure Limit...

Страница 9: ...9...

Страница 10: ...ut and mixing ratio output 9 Autobalance feature automatically compensates for reduced mirror reflectivity caused by contamination 10 Service Mirror LED illuminates to indicate mirror contamination is...

Страница 11: ...ght side of the aircraft but not for both B Mounting collar The mounting collar has 6 holes drilled in it that are ready to be tapped for either 8 32 or M4 screws for mounting Buck Research Instrument...

Страница 12: ...12 Figure 3 Dew Point Sensing Unit A B C...

Страница 13: ...switch position that applies full cooling current to the thermoelectric cooler This is used to 1 determine whether there is adequate cooling when the system is operating at very low frost points and...

Страница 14: ...14 Figure 4 Control Indicator Unit F A B C D E...

Страница 15: ...output 9600 Baud 8 N 1 The power unit is no longer furnished with a shock mounted base as we have determined that one should not be required for most aircraft installations If shock mounts are deemed...

Страница 16: ...en it is not exposed to in flight conditions It consists of an aspirating fixture which attaches to the sensor a pump a floating ball flowmeter with control valve and a length of non hygroscopic tubin...

Страница 17: ...17 Figure 6 Power Unit Internal...

Страница 18: ...lso be used The pressure field along the side of an aircraft in flight varies with location and may be greater or less than the ambient or static pressure Attempt to locate the sensor at a point where...

Страница 19: ...d 18 gauge wires contained in the cable used for connecting between the power unit and the control indicator unit and the cable used for connecting the power unit to the sensor unit It would also be a...

Страница 20: ...e 7 Sensing Unit Mounting Note 6 32 screws go into the mount collar which has a maximum depth of 0 375 Add this length to the total thickness of the aircraft skin and any plates used to deternine scre...

Страница 21: ...eal it off and observe its recovery to ambient pressure If recovery takes 10 seconds or longer the sensor is adequately sealed from leaks If a leak is apparent locate is using positive pressure and a...

Страница 22: ...22 any questions or doubts about making your own cable please contact Buck Research Instruments LLC and we would be happy to assist you Figure 8 Sensing Unit Internal...

Страница 23: ...23 Figure 9 Flow Test Fixture Hookup...

Страница 24: ...factors slew rate dew point flow rate and thickness setting Slew rate is in turn dependent on dew point and depression at higher dew points and moderate depression it is typically 1 C second At lower...

Страница 25: ...he first reading there is probably soluble material present in sufficient quantity to cause a measurement error Gaseous Contaminants If a gaseous material were present which had a higher condensation...

Страница 26: ...the sensor chamber is exposed to The location of the sensor probe on the aircraft can influence the pressure Attaching an altimeter and comparing it with the aircraft altimeter is a convenient way of...

Страница 27: ...ed there will be almost no air exchange within the sensor cavity To obtain readings of ambient dew point means for supplying air to the sensor must be provided either by opening the sensor cavity or b...

Страница 28: ...28 FIGURE 10 System Response Characteristics...

Страница 29: ...ose knobs and hardware as required Clean and lubricate 0 rings and gaskets with silicon grease If necessary replace any worn or damaged 0 rings or gaskets or other components 5 2 CLEANING SYSTEM OPTIC...

Страница 30: ...connect up an external pressure sensor A Heater Power 28 VDC optional B Heater Return optional D Pressure blue wire from 4 20 mA sensor E Power 16 VDC red wire from 4 20 mA sensor J Pressure do not u...

Страница 31: ...31 Recommended cable Belden YQ27540 Figure 11 Wiring Diagrams...

Страница 32: ...32 Recommended cable Belden YQ27540 Wiring Diagrams Continued...

Страница 33: ...33...

Страница 34: ...34 Figure 13 Vapor Pressure e vs Dew Point TD or Saturation Vapor Pressure es vs Temperature T...

Страница 35: ...35 Figure 13 Vapor Pressure e vs Dew Point TD or Saturation Vapor Pressure es vs Temperature T Figure 14 Absolute Humidity vs Dew Point...

Страница 36: ...36 Figure 15...

Страница 37: ...37 Figure 16 Aspirating Fixture Hookup...

Страница 38: ...38 Figure 17 1011C Hygrometer Complete...

Страница 39: ...3P Data Out PTO2E12 10S Sensor PTO2E20 16S Control Indicator PTO2E14 18S Serial Out 9 pin D sub Control Indicator PTO2E14 18P Cables Sensor PTO6E20 16P SR PTO6E14 19S SR Data PTO6E12 10P SR Power PTO6...

Страница 40: ...40 Table 2 Dew Point to Frost Point Conversions...

Страница 41: ...41 Table 3 Dew Point Error due to Pressure Change in Sampling System...

Страница 42: ...pressure es f1 T e RH Dew frost point DP f2 e e f2 r x P 622 x 103 r r f2 RH x f1 T 100 RH f2 rho x Tk 216 7 rho Vapor pressure e f1 DP DP r x P 622 x 103 r r RH x f1 T 100 RH rho x Tk 216 7 rho Mixi...

Страница 43: ...33 7 s ln e EF ln aw or ai EFw 1 10 4 7 2 P 0 0320 5 9 x 10 6 T 2 EFi 1 10 4 2 2 P 0 0383 6 4 x 10 6 T 2 where P is in kPa and T is in oC NOTE 2 RH is defined here using es with respect to ice below f...

Страница 44: ...er shall be borne by the Buyer Return shipping to Buyer shall be borne by Buyer for valid warranty claims This warranty shall become inapplicable in instances where the items have been misused or othe...

Страница 45: ...r temperature flag pressure PWM mirror board temp date time Balance number that indicates how close the servo is to being balanced and a dew frost point being measured on the mirror Mirror temperature...

Страница 46: ...e this is listed as RTD in the manual C Balance Vbal 0 10 V range Output of signal from optics 1011C is balanced and controlling on dew or frost when Vbal is close to 5V E PRESSURE for Pressure sensor...

Страница 47: ...47...

Страница 48: ...48...

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