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RPM4-AD™

Reference Pressure Monitor, Air Data Version

Operation and Maintenance Manual

Summary of Contents for RPM4-AD

Page 1: ...2005 2007 DH Instruments a Fluke Company RPM4 AD Reference Pressure Monitor Air Data Version Operation and Maintenance Manual...

Page 2: ...published materials however no warranty expressed or implied is provided DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the use of the infor...

Page 3: ...G FOR OPERATION 6 2 3 2 FRONT AND REAR PANELS 6 2 3 2 1 FRONT PANEL 6 2 3 2 2 REAR PANEL 7 2 3 3 POWER CONNECTION 7 2 3 3 1 85 TO 264 VAC 50 60 HZ VAC POWER 7 2 3 3 2 BATTERY PACK 7 2 3 4 REMOTE ENT C...

Page 4: ...4 AUTORANGE 33 3 3 5 LEAK CK RATE OF CHANGE MEASUREMENT 33 3 3 6 DISPLAY 34 3 3 6 1 AVG AVERAGE 36 3 3 6 2 RATE 37 3 3 6 3 DEV DEVIATION 38 3 3 6 4 RPT 39 3 3 6 5 HI LO 40 3 3 6 6 FREEZE 41 3 3 6 7 C...

Page 5: ...MESSAGE DESCRIPTIONS 112 5 MAINTENANCE ADJUSTMENTS AND CALIBRATION 115 5 1 OVERVIEW 115 5 2 CALIBRATION OF QUARTZ REFERENCE PRESSURE TRANSDUCERS Q RPT 115 5 2 1 PRINCIPLE 115 5 2 1 1 PA AND PM COEFFIC...

Page 6: ...PNEUMATIC SCHEMATIC AND VALVE STATES 126 5 6 1 RPM4 AD A160K A160K ROTARY WING 126 5 6 2 RPM4 AD A350K A160K FIXED WING 127 6 TROUBLESHOOTING 129 7 APPENDIX 133 7 1 REMOTE ENT 133 7 2 UNIT CONVERSION...

Page 7: ...ity levels 69 Table 13 Available unit of measure types by active Q RPT and measurement mode RPM4 AD A160K A160K rotary wing 71 Table 14 UNIT function available units of measure 72 Table 15 Available u...

Page 8: ...MAIN RUN screen display fields 14 Figure 4 Keypad layout 15 Figure 5 Battery pack charger 23 Figure 6 Status register schematic 109 Figure 7 Internal view 124 Figure 8 Pneumatic schematic and valve st...

Page 9: ...iples Section 4 is for remote operation from an external computer Section 5 provides maintenance and calibration information Section 6 is a quick troubleshooting guide Use it to troubleshoot unexpecte...

Page 10: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page VIII N NO OT TE ES S...

Page 11: ...easure pressure There are two configurations RPM4 A160Ka A160Ka covers the altitude and airspeed range typically appropriate for rotary winged aircraft RPM4 A350Ka A160Ka covers the range of altitude...

Page 12: ...e Connections Ps Pt AN 4 37 flare male VENT ATM 10 32 UNF Self Defense System SDS Included Isolates Q RPTs from Ps and Pt test ports and vents Q RPTs to atmosphere Pressure Limits A160K Q RPT A350K Q...

Page 13: ...Not normally used for air data measurements HI Q RPT differential Used for airspeed at varying altitude Precision 2 0 004 of reading or 2 Pa whichever is greater 4 0 005 of reading or 2 4 Pa whicheve...

Page 14: ...e for the resolution and short term stability of the on board barometer 3 Maximum deviation of the Q RPT indication from the true value of applied pressure including precision predicted one year stabi...

Page 15: ...c bag 2 1 2 INSPECTING CONTENTS Check that all items are present and have no visible damage A standard RPM4 AD includes all items indicated in Table 2 Table 2 RPM4 AD packing list DESCRIPTION PART 1 e...

Page 16: ...sing the optional rack mount kit 2 3 SETUP 2 3 1 PREPARING FOR OPERATION To prepare RPM4 AD for check out and operation Remove the plastic caps from the RPM4 AD rear panel pressure connections Remove...

Page 17: ...ER CONNECTION 2 3 3 1 85 TO 264 VAC 50 60 HZ VAC POWER Check that the RPM4 AD power switch is OFF Connect the supplied power cable to the rear panel power module Connect the other end of the power cab...

Page 18: ...PM4 AD A350K A160K TYPE OF MEASUREMENT TEST Pt TEST Ps VENT TEST Pt TEST Ps VENT Airspeed at varying altitude true Ps and Pt differential operation Connect to DUT Pt port Connect to DUT Ps or altitude...

Page 19: ...or connect a supply pressure to an RPM4 AD VENT port This will adversely affect GAUGE mode operation and AutoZeroing functions 2 3 7 CHECK SET SECURITY LEVEL RPM4 AD has a security system based on use...

Page 20: ...re unit of measure not altitude see Section 3 3 2 If SDS is CLOSED SDS CLOSED flashes over the display of pressure on the top line of the display Press SDS 2yes to OPEN SDS see Section 3 3 8 Do NOT OP...

Page 21: ...tered or the range is changed Press AutoZ This runs AutoZ to zero the Q RPT reading see Section 3 3 9 1 Upon return to the MAIN RUN screen observe that the indication of measured pressure has zeroed I...

Page 22: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page 12 N NO OT TE ES S...

Page 23: ...munication 3 1 1 MAIN RUN SCREEN The RPM4 AD MAIN RUN screen is its home display that is reached on power up and from which other functions and menus are accessed It is the very top level of all menu...

Page 24: ...ank AutoZ is OFF 3 5 1 6 RR Active Q RPT indicator Indicates the active Q RPT in the RPM4 The active Q RPT measurement is displayed on the RPM4 top line Hi Hi Q RPT Lo Lo Q RPT HL Hi and Lo Q RPTs tog...

Page 25: ...hat are not generally used as a part of day to day operation see Section 3 5 These keys enter numerical values when editing Figure 4 Keypad layout Pressing the ENT key generally causes execution or fo...

Page 26: ...lel measurement mode Rapid beeps for 8 seconds 3 2 5 3 2 GENERAL OPERATING PRINCIPLES 3 2 1 Q RPTS AND Q RPT SELECTION RPM4 AD has two Q RPTs In RPM4 AD A160K A160K the two Q RPTs have of the same ran...

Page 27: ...t pressure unit of measure Q RPT and measurement mode 3 3 2 Mode Set pressure measurement mode absolute gauge negative gauge Q RPT 3 3 3 Display Set bottom line display function System 3 3 6 Head Set...

Page 28: ...ometer not its absolute measurement uncertainty This additional uncertainty is 1 Pa 0 00015 psi In RPM4 AD A160K A160K the two A160K Q RPTs are used in parallel measurement mode in gauge mode to reduc...

Page 29: ...d to the TEST Pt port with both Q RPTs and averages the two see Section 3 2 5 Since the gauge pressure is the difference from atmospheric pressure it directly provides the differential pressure used t...

Page 30: ...ent mode see Section 3 2 6 the LED Ready Not Ready indication applies to the differential pressures In parallel measurement mode see Section 3 2 5 the LED Ready Not Ready indication applies to the ave...

Page 31: ...e Q RPTs from overpressure When SDS is CLOSED for a Q RPT module the Q RPT is isolated from the module s TEST port and opened to the module s VENT port See Section 5 6 Figure 8 Figure 9 SDS can be OPE...

Page 32: ...GE indicator light goes on to indicate that battery charging is in progress Allow 14 to 16 hours for the battery to charge fully When the battery is fully charged the CHARGE indicator light flashes Wh...

Page 33: ...s a brief summary of direct function key operation It may be useful to keep a copy of this summary near the RPM4 AD especially when first becoming acquainted with its operation Local operation of RPM4...

Page 34: ...g routine also used for average rate measurements e g ascent descent Menu of commonly used setup features including set display resolution set stability limit Select the display function for the botto...

Page 35: ...N screen without making any change Q RPT specific RPM4 AD operating settings are saved with the Q RPT when another Q RPT is made active see Section 3 2 1 Table 5 When the Q RPT is selected again it ha...

Page 36: ...ANGE SELECTION HL Q RPT SHORTCUT TO AIRSPEED BEST UNCERTAINTY Selects HL Q RPT Hi and Lo Q RPTs in parallel with airspeed displayed on top line and altitude corresponding to local atmospheric pressure...

Page 37: ...ent the RPM4 AD Q RPT before changing active Q RPT 3 3 2 UNIT PURPOSE To select the unit of measure in which RPM4 AD displays measured values The units of measure available under the UNIT key depend u...

Page 38: ...50K A160K fixed wing UNIT TYPE Q RPT MEASUREMENT MODE PRESSURE ALTITUDE AIRSPEED USER Absolute a Yes Yes No Yes Lo Lo Gauge negative gauge g Yes No No Yes Absolute a Yes No No Yes Hi Hi Hd Gauge negat...

Page 39: ...Hg psi inWa kts km h Absolute a kPa inHg psi mbar hPa mmHg Hi Hi Hd Gauge negative gauge g differential d 1 kPa inHg psi inWa kts km h 1 Altitude measured by Lo Q RPT can be displayed while measuring...

Page 40: ...between different measurement modes Absolute Measures pressure relative to vacuum zero is hard vacuum Range is from zero absolute to full scale Absolute mode is used to measure altitude without airsp...

Page 41: ...ON Differential mode operation is only available with the Hi Q RPT Hi active see Section 3 2 1 in absolute measurement mode Differential mode supports simultaneous measurement of air speed and altitud...

Page 42: ...to be viewed while displaying air speed The Lo Q RPT altitude unit of measure is set in the RPT DISPLAY function see Section 3 3 6 4 All other DISPLAY functions Average Rate Deviation HiLo Freeze appl...

Page 43: ...e rate of change of altitude set by an air data test set To use the function in this way set the desired rate measurement time period then set the rate with the air data test set When ready press ENT...

Page 44: ...s screen displays Data NOT available briefly and returns to MAIN RUN screen Press ENT or ESC to return to the MAIN RUN screen Leak check is Q RPT specific in the sense that a leak check is run using t...

Page 45: ...pressure observed in a system over a period of time or to monitor if a pressure min max limit has been exceeded FREEZE Captures and displays the value measured by the active Q RPT of RPM4 AD when the...

Page 46: ...riod in seconds Default is 20 Minimum 1 maximum 999 Averaging Period 20 s Edit the averaging time period if desired Pressing ENT returns to the MAIN RUN screen with the Average DISPLAY active With the...

Page 47: ...PLAY choice see Section 3 3 6 3 3 6 2 Rate PURPOSE To activate the Rate DISPLAY See Section 3 3 6 DISPLAY Principle OPERATION To activate the Rate DISPLAY press DISPLAY The display is Select whether t...

Page 48: ...MAIN RUN screen with the Deviation DISPLAY active using the entered target value The target value is the value from which deviations D are measured by the Deviation DISPLAY following D current value...

Page 49: ...unit operation returns to the MAIN RUN screen with the inactive Q RPT displayed on the display s bottom line and the settings unit of measure resolution of the inactive Q RPT are the same as for the a...

Page 50: ...the inactive Q RPT when the RPT DISPLAY is activated SDS can be OPENED on the inactive Q RPT using SPECIAL 4SDS 1temp open close see Section 3 5 4 In differential measurement mode SDS is be opened si...

Page 51: ...make a new DISPLAY choice see Section 3 3 6 3 3 6 6 Freeze PURPOSE To activate the Freeze DISPLAY See Section 3 3 6 Principle OPERATION To activate the Freeze DISPLAY press DISPLAY 6Freeze Pressing 6...

Page 52: ...ference in height frequently called head can cause a significant difference between the pressure measured by the RPM4 AD at the height of its TEST ports and the pressure at the device under test which...

Page 53: ...indicated by h in the top line of the MAIN RUN screen see Section 3 1 1 When the head correction is zero the h is not shown To change units of head height between inches and centimeters and to change...

Page 54: ...t guarantee that overpressure damage will NOT occur SDS closing automatically may protect a Q RPT in case of accidental overpressure but conventional measures for overpressure protection should always...

Page 55: ...ed the active TEST port does NOT exceed the Q RPT s Pmax before doing so When changing active Q RPT SDS is automatically CLOSED for the Q RPT that is being changed from leaving the inactive Q RPT with...

Page 56: ...hat is used for the active measurement mode In parallel measurement mode see Section 3 2 5 the RPM4 AD s two RPTs are connected to one TEST port by the internal bypass valve Only one TEST port is used...

Page 57: ...ential mode 3 3 9 1 AUTOZ IN GAUGE AND NEGATIVE GAUGE MODE PURPOSE To rezero the active Q RPT in gauge measurement mode See Section 3 5 1 Principle for a full explanation of the AutoZ function OPERATI...

Page 58: ...e AutoZ function OPERATION For the AutoZ function key to run AutoZ AutoZ must be turned ON for the active Q RPT and measurement mode AutoZ ON is indicated by z to the left of the range designator on t...

Page 59: ...active see Section 3 3 7 the head correction is momentarily disabled while running AutoZ to avoid zeroing out the head value The value of Poffset is always displayed and entered in Pascal Pa Run AutoZ...

Page 60: ...up so that the active Q RPT measurement mode absolute and unit of measure are compatible RPM4 AutoZ by COM2 reads the reference RPM4 as is and will use whatever pressure value it responds with to a s...

Page 61: ...eady press ENT to cause AutoZ to run RPM4 AD logs both readings and calculates a new AutoZ offset value The display is Press ENT to activate the new value of Poffset or ESC to start over Old Poffset 0...

Page 62: ...played on the bottom line of the RPM4 AD display Once the pressure has been adjusted to the desired line pressure allow the pressure to stabilize for at least 60 seconds After pressure stabilization p...

Page 63: ...layed PRINCIPLE The resolution with which RPM4 AD displays pressure values can be adjusted The resolution setting determines the number of digits with which pressure is displayed The resolution is cal...

Page 64: ...bsolute and gauge measurement modes 3 Pa 0 00044 psi or air data equivalent RPM4 AD A350K A160K A350K Hi Q RPT Absolute gauge and absolute differential measurement modes 6 Pa 0 00088 psi or air data e...

Page 65: ...er limit negative gauge mode only is 110 kPa 16 psi In differential measurement mode see Section 3 2 6 UL has upper and lower limits If the measurement unit is an airspeed unit there is no lower limit...

Page 66: ...ssure The over pressure function causes the measured pressure display to flash SDS closes shutting off the TEST port see Section 3 2 8 The overpressure function also logs the time and date of the over...

Page 67: ...n RPM4 AD has been exposed to temperature changes exceeding 15 C 36 F in absolute mode PRINCIPLE AutoZ Purpose and Principle The main component of the change over time of the RPM4 AD Q RPTs is change...

Page 68: ...te pressure is calculated as Pabs Pu Poffset A In absolute measurement mode running the AutoZ function to update the AutoZ value Poffset A is initiated by the operator using AutoZ see Section 3 3 9 2...

Page 69: ...ated by the operator pressing AutoZ RPM4 AD s differential mode AutoZ function connects both RPTs together internally to the TEST Ps port to be sure they are exposed to the same pressure AutoZ ON OFF...

Page 70: ...or differential specific SPECIAL 1AutoZ is to perform AutoZ management functions such as turning AutoZ ON and OFF In day to day operation to RUN the AutoZ routine that rezeroes the Q RPTs use AutoZ s...

Page 71: ...r absolute g for gauge 2 Edit field for value of Hi Q RPT Poffset 3 Indication that this is the Hi Q RPT Poffset 4 Edit field for value of Lo Q RPT Poffset 5 Indication that this is the Lo Q RPT Poffs...

Page 72: ...return to terminate a received command but responds with both and ASCII 13 carriage return and an ASCII 10 line feed There are no other options 3 5 2 2 3IEEE 488 The IEEE 488 port s primary address ca...

Page 73: ...ds to COM2 COM1 If COM2 COM1 passes PASSED is displayed briefly followed by the conclusion The RS232 test has PASSED If a test fails Execution is suspended until ENT is pressed The RPM4 AD RS232 test...

Page 74: ...again 3 5 4 1 1TEMP OPEN CLOSE OPERATION See Section 3 2 8 for complete information on RPM4 s SDS Self Defense System feature To temporarily open or close the SDS of the Hi or Lo Q RPT press SPECIAL 4...

Page 75: ...creen Select 2off to open SDS permanently so operation is as if SDS were not installed Press ESC to return without making changes SDS full time 1on 2off If 2off is selected and SDS is not already open...

Page 76: ...mpletely eliminated Setting screen saver time to zero eliminates the SCREEN SAVER function so that the display permanently remains at full brightness OPERATION To access the SCREEN SAVER function pres...

Page 77: ...D Select 2edit to edit the ID The ID has twelve characters When the edit screen is opened the cursor is on the first character Numerical values can be entered directly from the keypad In addition the...

Page 78: ...It allows access and editing in all areas including critical metrological information Low Low security is designed to protect the specific metrological information and SYSTEM DIAGNOSTIC AND MAINTENAN...

Page 79: ...L 1AutoZ 3edit SPECIAL 2remote SPECIAL 2remote make changes SPECIAL 3head SPECIAL 4SDS SPECIAL 5pref 1ScrSvr SPECIAL 5pref 2sound SPECIAL 5pref 3time SPECIAL 5pref 3time make changes SPECIAL 5pref 4ID...

Page 80: ...t If there is an active password the RPM4 AD password entry screen appears The user must enter the user defined password or the factory secondary password to proceed further RPM4 SNnnnn xx Password pp...

Page 81: ...types of measurement unit supported by RPM4 AD Select the unit type SI and other are pressure units Not all unit types are available for all Q RPTs and measurement modes Unit 6 1SI 2other 3altitude 4a...

Page 82: ...2true is selected the default air temperature to be used in calculating airspeed must be entered The display is 1 Entry field for default temperature to be used in true airspeed calculation The defaul...

Page 83: ...nt units supported by RPM4 AD Select the unit type SI and other are pressure units Unit 6 1SI 2other 3altitude 4airspeed 5user See Table 15 for definition of unit type availability by Q RPT and measur...

Page 84: ...L menu choices include 1baro View the real time output of the on board barometer if present see Section 3 5 7 1 2ReadRt Turn ON and OFF RPM4 s automated rate of change dependent reading integration ra...

Page 85: ...To turn ON and OFF RPM4 s automated rate of change dependent reading integration rate feature PRINCIPLE To obtain maximum resolution from RPM4 AD Q RPT pressure measurements an integration time of abo...

Page 86: ...able the RPM4 AD parallel measurement mode in which two Q RPT modules are used to measure in parallel and their readings are averaged The ability to turn ON and OFF parallel measurement mode is not us...

Page 87: ...ser has made and should be used only to restore the RPM4 AD to a known state RPM4 AD goes through its power up sequence after any type of reset is executed RPM4 AD reset functions will change current...

Page 88: ...of Hi Q RPT range 3 4 4 Resolution 0 001 FS of Hi Q RPT default range 3 4 2 AutoZ AutoZ ON for all Q RPTs and measurement modes Zoffset value not affected 3 5 1 AutoZ Patm 0 set to 101 325 kPa a 3 5...

Page 89: ...tive gauge modes 3 5 1 AutoZ function ON all Q RPTs all measurement modes 3 5 1 3 5 9 5 5 ALL PURPOSE The reset all function clears and deletes large amounts of user defined information including crit...

Page 90: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page 80 N NO OT TE ES S...

Page 91: ...operation was sent to the unit 4 2 1 RS232 INTERFACE 4 2 1 1 COM1 The RPM4 AD COM1 RS232 interface is located on the back of the unit It is a 9 pin male DB 9F connector configured as a DCE device Data...

Page 92: ...9M to DB 9F RS232 cable to be used to connect to a DCE device Handshaking is not required or supported Table 21 COM2 DB 9F Pin Designations PIN FUNCTION DESCRIPTION 2 RxD This pin transmits serial da...

Page 93: ...ic text referred to as the program message header The two types are COMMAND type and QUERY type commands 4 3 2 1 USING COMMAND TYPE COMMANDS Enhanced format commands DO NOT reply when using the IEEE 4...

Page 94: ...e Wait for reply UNIT KPA or UNIT KPA Generates a reply User must wait for reply before continuing MMODE A or MMODE A Generates a reply User must wait for reply before continuing PR or PR Generates a...

Page 95: ...set the RPM4 AD alphanumeric asset ID tag L2 Selects classic program message format L3 Selects enhanced program message format LLn Read or set the lower limit for the current range negative gauge and...

Page 96: ...ce time out error ERR 9 Unknown command ERR 10 Missing or invalid command suffix ERR 11 Command missing argument ERR 12 System overpressured or overpressure may result ERR 13 Text queue overflow ERR 1...

Page 97: ...any settings are Q RPT specific Suffix of 1 for Hi or HL Q RPT access Suffix of 2 for Lo Q RPT access If an optional suffix is allowed but not given then the Active Q RPT is addressed The Active Q RPT...

Page 98: ...M2 port This example gets the version of the second RPM4 AD See Also COM2 3 5 2 ABORT Purpose Cancels any pending data requests by the PR PRR RATE SR or CONT commands Command Classic ABORT ABORT Remar...

Page 99: ...t If in differential mode the autozero function can take up to 10 seconds to complete You cannot autozero while in an airspeed or altitude unit Running AutoZ in differential measurement mode may take...

Page 100: ...t Query reply COM1 9600 N 8 1 9600 N 8 1 No reply if GPIB 488 Example enhanced Cmd sent Query reply COM1 9600 N 8 1 9600 N 8 1 Example classic Sent Reply COM1 9600 N 8 1 9600 N 8 1 Errors ERR 7 Missin...

Page 101: ...date DATE Classic DATE date DATE Arguments date The date in the numerical only format YYYYMMDD Remarks The RPM4 AD has an internal real time calendar clock The span of acceptable dates ranges from 19...

Page 102: ...m gas The gas type This must be N2 AIR or HE Command is case sensitive Remarks The RPM4 AD can make a gas head correction to allow it to display the pressure at a level other than the reference level...

Page 103: ...than the lower limit the pressure display flashes This feature can used to prevent accidental over under pressure of a device under test Example enhanced Cmd sent Reply LL 4 4 kPa g no reply if IEEE 4...

Page 104: ...xample enhanced Cmd sent Query reply MMODE A A Example enhanced Cmd sent Query reply MMODE G G Errors ERR 6 ERR 7 ERR 10 ERR 20 ERR 53 Invalid argument text Abs mode only with altitude units or gauge...

Page 105: ...ple enhanced Cmd sent Query reply PCAL 2 1 1 000021 20011201 2 10 Pa 1 000021 20011201 Example enhanced Cmd sent Query reply PCAL HI 2 1 1 000021 20011201 PPC3 style is OK 2 10 Pa 1 000021 20011201 Ex...

Page 106: ...atus field Refer to the SR command pressure The measured pressure for the active Q RPT in the current pressure unit This is followed by the current pressure unit rate The measured rate of pressure cha...

Page 107: ...is is followed by the current active Q RPT s pressure unit If the current active Q RPT pressure unit is an airspeed unit then the barometer will be indicated in feet Not all RPM4s are equipped with an...

Page 108: ...ctive Q RPT read rate or auto read rate mode Command Query READRATEn period READRATEn Classic READRATEn period READRATEn Optional Suffix n The active Q RPT is assumed if no suffix is given 1 Specify t...

Page 109: ...DYCK1 1 1 no reply if GPIB 488 Example enhanced Cmd sent Query reply READYCK1 1 Example enhanced Cmd sent Query reply READYCK 1 if Q RPT condition has stayed Ready 0 if Q RPT condition has NOT stayed...

Page 110: ...the resolution setting 0 0001 less results in 2 decimal places of resolution in altitude 0 0010 results in 1 decimal place of resolution in altitude 0 0100 greater results in an integer display altitu...

Page 111: ...and negative gauge modes OFF and supports only gauge measurement mode N if Q RPT is BGxxx and supports gauge and negative gauge measurement modes Example enhanced Cmd sent Query reply RPT2 Get inform...

Page 112: ...et the automatic full time ON OFF status of the SDS system This is equivalent to use of the SDS full time ON OFF function from the RPM4 AD front panel Command Query SDSAUTO on SDSAUTO Classic SDSAUTO...

Page 113: ...d OL The pressure of one of the active Q RPTs has exceeded the user defined upper or lower limits OP The pressure of one of the Q RPTs has exceeded the Q RPT s maximum limits ER An internal device fai...

Page 114: ...hour format using a colon delimiter am or pm Example enhanced Cmd sent Query reply TIME 12 52PM 12 52pm No reply if GPIB 488 Example enhanced Cmd sent Query reply TIME 12 52PM 12 52pm Example classic...

Page 115: ...n The active Q RPT is assumed if no suffix is given 1 Specify the Hi Q RPT if the HL RPT is not active Specify the HL Q RPT if the HL Q RPT is active 2 Specify the Lo Q RPT if the HL Q RPT is not acti...

Page 116: ...n or d If the unit specified is InWa an optional second argument ref can be set The ref can be 4 20 or 60 corresponding to InWa at 4 C 20 C or 60 F If this second argument is not given when the unit i...

Page 117: ...differential measurement mode Pa Remarks The pressure offset Poffset for the specified Q RPT Hi or Lo can be accessed with this program message There are separate offsets for gauge absolute and diffe...

Page 118: ...L parallel mode Q RPT active mmode g sets HL both Hi and Lo Q RPT to gauge measurement mode unit kts or other airspeed unit sets HL Q RPT to indicate airspeed unit sdsact 0 opens SDS so pressure can r...

Page 119: ...ther bits are common to both types of query Each of these status bits can cause a SRQ to occur The Service Request Enable Register SRE program message determines which of these flags are able to asser...

Page 120: ...ogram message determines which of these flags are able to assert the ESB bit The description of these bits are given as PON Power On Bit 7 128 Indicates that the RPM4 AD power has been cycled since th...

Page 121: ...are able to assert the RSB bit The description of these bits are given as MEAS LO Lo RPT measurement ready Bit 6 64 Indicates that the Hi Q RPT has completed a Q RPT measurement NRDY LO Lo Q RPT press...

Page 122: ...yte Register RSE Read or set the Ready Status Enable Register RSR Read the Ready Status Register 4 6 1 PROGRAM MESSAGE DESCRIPTIONS CLS Purpose Clear all of the status event structures Command CLS Rem...

Page 123: ...nced Sent Reply RST RST no reply if IEEE 488 See Also 3 5 9 1 SRE Purpose Read or set the Service Request Enable Register Command Query SRE n SRE Default SRE 0 Arguments n 0 to 255 This is the decimal...

Page 124: ...dy Status Enable Register determines which bits in the Ready Status Register are enabled and included in the Status Byte Register RSR bit and can assert the SRQ line The reply is in decimal numeric fo...

Page 125: ...or repair during the warranty period is undertaken at the owner s risk and may cause damage that is not covered under warranty and or may void the warranty For warranty service contact a DHI Authorize...

Page 126: ...and PM a multiplier or span set The coefficients affect the Q RPT reading following Corrected reading uncorrected reading PM PA PA is expressed in units of pressure always the SI unit Pascal PM is di...

Page 127: ...ecifications Able to supply the recommended sequence of absolute pressure points in the range to be calibrated See Section 5 2 4 for information on the recommended calibration point sequence for RPM4...

Page 128: ...RANGE to set the active Q RPT to Lo for the A160K Q RPT or Hi for the A350K Q RPT see Section 3 3 1 2 Use MODE to set the measurement mode to absolute see Section 3 3 3 Use UNIT to set the unit of mea...

Page 129: ...t as long as the exact value of the applied pressure is known Best results are obtained if the actual applied pressure is within 2 of the recommended nominal point 5 2 4 2 A350K Q RPT CALIBRATION SEQU...

Page 130: ...rd the date on which the Q RPT is calibrated The value of absolute mode AutoZero Poffset See Section 3 5 1 for complete AutoZero information This value is normally set to zero following calibration a...

Page 131: ...000 If in edit mode the calibration fields can be edited ENT in view mode returns to the view edit screen ENT in edit mode goes to confirmation of change activation if changes have been made in any of...

Page 132: ...the desired pressure unit of measure not an air data unit see Section 3 3 2 Use MODE to set absolute pressure measurement mode see Section 3 3 3 Use SPECIAL 1AutoZ to access the AutoZ function see Se...

Page 133: ...n the current unit of measure To change the unit of measure return to the main run screen and use UNIT 5 4 RELOADING EMBEDDED SOFTWARE INTO FLASH MEMORY RPM4 AD uses FLASH memory This allows the embed...

Page 134: ...board 4 On board barometer 5 Lo Q RPT module 6 Hi Q RPT module 7 Display Figure 7 Internal view 5 5 1 MINI MICRO BOARD The micro board supports a Motorola 68302 micro controller EPROM EEPROM 128k x 1...

Page 135: ...ts The SDS Self Defense System and Hi Q RPT Lo Q RPT bypass solenoid valves are mounted on the manifold A Q RPT provides very high precision low uncertainty pressure measurement The basic sensing prin...

Page 136: ...uncertainty only at ambient pressure altitude VALVE STATE CONDITION A B C D E SDS Open O C C C O SDS Closed C C O O C VALVE STATE CONDITION A B C D E SDS Open C O C C O SDS Closed C C O O C Hi Q RPT...

Page 137: ...AND GAUGE MODES airspeed at ambient pressure altitude only HI Q RPT ACTIVE DIFFERENTIAL MODE airspeed and any altitude VALVE STATE CONDITION A B C D E SDS Open O C O C C SDS Closed C C O O C Power off...

Page 138: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page 128 N NO OT TE ES S...

Page 139: ...ds and unit of measure is an air data unit altitude in a mode other than absolute or airspeed in absolute mode are nonsensical Use front panel or remote commands to change measurement mode or unit of...

Page 140: ...tentional 3 2 5 A Ready green Ready Not Ready indicator indication is never achieved Stability settings is too tight and or existing conditions will not allow Ready to be achieved Adjust stability set...

Page 141: ...1 5 6 Is NOT reading pressure applied to the TEST port RPM4 AD has two TEST ports and pressure to be measured is connected to correct port but active Q RPT is NOT the Q RPT on that TEST port Familiar...

Page 142: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page 132 N NO OT TE ES S...

Page 143: ...switch is OPEN When RPM4 AD detects a CLOSED condition held for 300 ms it is interpreted as equivalent to a press of the ENT key Any switch may be used to accomplish the remote ENTER function The swit...

Page 144: ...logram force per centimeter square 1 019716 E 05 mTorr milliTorr micron of mercury 7 50063 Torr Torr millimeter of mercury 7 50063 E 3 user User User defined coefficient ft feet of altitude see Sectio...

Page 145: ...d airspeed at sea level atmospheric conditions Some texts refer to this version of airspeed as calibrated airspeed because the value is corrected for specific atmospheric conditions Other texts refer...

Page 146: ...nd assuming sea level atmospheric conditions P 101325 Pa and T 288 15K Vt Calculated true airspeed in meters per second The measured value for static pressure and user input value for temperature are...

Page 147: ...rnational standard ISO 1151 5 The conversion of Mach number requires two pressure inputs differential pressure and static pressure The equations below are used to determine the Mach number There are t...

Page 148: ...RPM4 AD OPERATION AND MAINTENANCE MANUAL 2005 2007 DH Instruments a Fluke Company Page 138 For M 1 Start with M for the case in which M 1...

Page 149: ...of the products In no event shall DH Instruments be liable to purchaser for any unforeseeable or indirect damage it being expressly stated that for the purpose of this warranty such indirect damage in...

Page 150: ...om Worldwide Minerva Meettechniek B V Chrysantstraat 1 3812 WX Amersfoort the NETHERLANDS Tel 31 33 46 22 000 Fax 31 33 46 22 218 info minervaipm com European Union Ohte Giken Inc Technology Center 25...

Page 151: ...is intrinsically gauge but only measures pressure greater than atmosphere Gxxx Q RPTs support gauge measurement mode only Gauge Mode Measurement mode in which the Q RPT indicates gauge pressure diffe...

Page 152: ...asured by RPM4 s active Q RPT is stable within the stability limit Leading character of the second line when the inactive Q RPT is displayed on the second line in RPT DISPLAY mode RPT2x Parallel measu...

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