GE Druck DPI 740, User Manual

Page 1: ...GE Sensing Druck DPI 740 Precision Pressure Indicator User Manual K0200 ...

Page 2: ... The General Electric Company All rights reserved ...

Page 3: ...ure Donotapplypressuregreaterthanthemaximumsafeworking pressure to the instrument Toxic Materials There are no known toxic materials used in this instrument Maintenance The instrument must be maintained using the manufacturer s procedures and should be carried out by authorised service agents or the manufacturer s service departments Technical Advice For technical advice contact the manufacturer a...

Page 4: ...g approved methods When storing and transporting batteries make sure that they cannot be short circuited A short circuited battery can become very hot and can in certain circumstances explode It is recommended that a suitable container is used for storing and transporting batteries Dispose of old batteries using a safe approved method Refer to the Battery Manufacturer for this information Software...

Page 5: ...UCI Druck Universal Communication Interface ftH2O feet of water FS full scale hPa hecto Pascal Hz Hertz ICAO International Civil Aviation Organisation i d inside diameter inHg inch of mercury inH2O inch of water ISA International standard atmosphere kg kilogram kgf cm2 kilogram forceper square centimetre kgf m2 kilogram forceper square metre kPa kilo Pascal lbf ft2 pound force per square foot LCD ...

Page 6: ...evel pressure including air temperature QNH calculated sea level pressure RPT resonant pressure transducer RTS ready to send RS232 Serial data communication standard Rx receive Tx transmit V Volt VA Volt amp C degrees Celsius F degrees Fahrenheit Symbols The following symbols are used to identify hazards on this instrument Static sensitive components handle with extreme care Thissymbol ontheinstru...

Page 7: ...ion 11 3 1 General 11 3 2 Measurement Modes 11 Local QFE Measurement 13 Sea Level QFF Measurement 14 Altitude Measurement 16 Processing Measurements 18 Tare 18 Filter 18 Max Min 21 3 3 Set up Menu 25 Battery 26 Units 26 Time out 28 Serial Communications 29 Entering a new PIN 31 Sending Measurements to a Printer or PC 32 4 Calibration 33 Calibration Check 33 5 Maintenance 37 5 1 General 37 5 2 Faul...

Page 8: ...ead Commands 56 Protocol Format Commands 58 Key Commands 59 Approved Service Agents 64 Table of Illustrations fig title page 1 1 General view 1 2 1 Fitting the battery 6 2 2 Electrical connections 8 2 3 Adaptor charger connector 9 3 1 Instrument front panel 11 3 2 Measurement mode menu 12 3 3 Local pressure measurement 13 3 4 Sea level measurement 14 3 5 Altitude measurement 16 3 6 Process sub men...

Page 9: ...ssure reading in units of pressure measurement and altitude The instrument is contained in a moulded enclosure of a composite ABS material and can be used as a hand held indicator or using a retractable stand as a bench instrument Theinstrument canalsocommunicate throughaserialRS232 connector with a compatible computer system or printer Figure 1 1 General view ...

Page 10: ...ting Accuracy Non linearity hysteresis and repeatability over the range of 10 to 30 C 0 02 FS over the range of 0 to 40 C 0 03 FS over the range of 10 to 50 C 0 045 FS Stability 100 ppm year Range barometric 750 to 1150 mbar a alternative ranges 35 to 1300 mbar a 35 to 2600 mbar a 35 to 3500 mbar a Maximum safe working pressure 4375 mbar a Display Read out 999999 LCD digits 13 6mm high with additi...

Page 11: ...ions external power adaptor charger International power jack RS232 serial communications 6 way LEMO type Electrical safety This instrument meets BS EN 61010 as applicable Electromagnetic compatibility This instrument meets EN50081 1 emissions EN50082 1 immunity Continuing development sometimes necessitates specification changes ...

Page 12: ...ertificate iii Carrying case Options A Enhanced barometric accuracy over the range of 10 to 30 C 0 15 mbar B NiCad batteries and power adaptor charger Adaptor charger External Power 100 to 240 V a c nominal 10 VA 47 65 Hz Output 12 Vd c 800 mA maximum Connection International power jack C Adaptor cable For RS232 connecting the 6 pin LEMO to standard 9 way D type D Transit case ...

Page 13: ... 1 Three batteries are fitted in the battery compartment For non rechargeable batteries make sure the charging link LK2 is fitted in the disabled position For rechargeable batteries make sure the charging link LK2 is fitted in the enabled position Note The charging link LK2 is located on the instrument PCB To access this link remove the top case assembly To replace the batteries unscrew the captiv...

Page 14: ...harger is supplied with a set of interchangeable connectors so that the unit can be used worldwide Tochangethepowerpinadaptorpushtheadaptor from the charger body align the replacement adaptor and push onto the charger body Battery charger This is a two pole 2 5 mm centre pin connector ve centre pin ve outer connector casing captive screw ...

Page 15: ...ws Baud rate 9600 Data bits 8 Stop bits 1 Parity none Handshaking none Adaptor Cable Notes 1 The function column for the D type connector uses RS232 terminology with respect to DTE 2 IntheD typeconnectorDTRandDSRshouldbeconnected together as follows 9 way pin 4 and 6 25 way pin 20 and 6 3 The instrument s serial communication settings can be changed using the set up menu Pin No Function Flow Funct...

Page 16: ...K0200 Issue No 1 8 DPI 740 UserManual Figure 2 2 Electrical connections ...

Page 17: ...DPI 740 User Manual 9 K0200 Issue No 1 Figure 2 3 Adaptor charger connector FOR ALL Druck INSTRUMENTS PART No 191 129 ...

Page 18: ... Units of pressure measurement selected by F2 mbar inHg hPa Battery charging link LK2 disabled Calibration link LK1 disabled PIN 000 Time out enabled 1 minute Option B Instrument Settings Units of pressure measurement selected by F2 mbar inHg hPa Battery charging link LK2 enabled Calibration link LK1 disabled PIN 000 Time out enabled 1 minute ...

Page 19: ...ing the SET push button steps through the set up menu described in 3 3 3 2Measurement Modes Figure 3 1 Selecting the MODE push button changes the measurement mode between Local QFE unprocessed pressure at the pressure port Sea QFF calculated pressure at sea level Altitude calculated height from pressure datum Selecting the push button F2 changes the units of pressure measurement continuous pressin...

Page 20: ...hange units Change units feet or metres Change units SEA same as QFE PROCESS SET_QFF Enter Height ASL HT ft or metres Enter Temp STORE HEIGHT STORE TEMPERATURE TEMP V C to QFE SET_ALT same as QFE PROCESS ISA alt USER Pressure Datum Dat 1013 25 mbar Enter Datum STORE PRESSURE DATUM Dat 1013 25 mbar F1 F1 F1 F1 F1 F1 F1 F1 F1 F2 F2 F2 F2 F2 F2 F2 F2 F2 SET SET SET SET MODE MODE MODE ...

Page 21: ...re sensed at the pressure port In addition to measuring local pressure the instrument can with the use of a hose and connection measure absolute pressure at a system test point Figure 3 3 Local pressure measurement units of measurement press F2 to change between three units tare measurement mode pressing F1 enters PROCESS menu ...

Page 22: ... a correction for local air temperature Setting local height and temperature data These correction factors are entered for a particular site and remain stored in nonvolatile memory to correct the pressure value when Sea QFF is selected The two correction factors are mean height above sea level in metres or feet units selected in altitude mode and the local air temperature in C Figure 3 4 Sea level...

Page 23: ...onfirmed by the display flashing Enter Height ASL 4 Press either F1 F2 or SET to allow the height to be entered the display stops flashing 5 Use F1 to increase the height value and F2 to decrease the height value Note Pressing and holding either F1 or F2 changes the value at a fast rate Pressing and holding MODE and either F1 or F2 accelerates this fast rate 6 When the height is correct press SET ...

Page 24: ... The default pressure datum is the ISA 1013 25 mbar A user defined pressure datum can be entered by the SET_ALT menu This datum can be a specified pressure datum known or required by the user such as true sea level pressure or airfield ground pressure at the time of measurement Figure 3 5 Altitude measurement tare units of altitude press F2 to step between feet and metres pressing F1 steps to PROC...

Page 25: ...e altitude settings by selecting SET_ALT 4 Press F1 if the datum required is the ISA To enter any other datum press F2 5 Press either F1 F2 or SET to allow the datum to be entered the display stops flashing 6 Use F1 to increase the datum value and F2 to decrease the datum value Note Pressing and holding either F1 or F2 changes the value at a fast rate Pressing and holding MODE and either F1 or F2 ...

Page 26: ...unction proceed as follows 1 Press the MODE push button to select the measurement to be tared 2 Press F1 to enter the instrument menu 3 Press F1 to view the process options 4 Press F1 again to view the tare options 5 Press F1 to enable tare or F2 to disable tare Filter When switched on the low pass filter is applied to all measurements in all three measurement modes Before switching on the two par...

Page 27: ...ess sub menu PROCESS Local pressure FILTER MORE ON OFF ON OFF QFE Change units MAX MIN MORE TARE MORE F1 F1 F1 F1 F2 F2 F1 F2 F2 F1 F2 F1 F2 MODE F1 F1 F2 F1 F2 value units t MAX MIN t s t MIN OFF value units s F1 F1 F2 value units t MAX OFF s value units s ...

Page 28: ...et to 2 seconds the display shows the full pressure value after 10 seconds Proceed as follows 1 Make sure the instrument is in measurement mode and displaying pressure 2 Press SET twice and status line shows MAX MIN FILTER 3 Press F2 to select FILTER settings 4 Use F1 and F2 to set the BAND value 5 Press SET when the display shows the required value 6 Repeat steps 4 and 5 to enter the TIME value P...

Page 29: ... F2 to switch filter off Note When the filter is switched on the display shows the symbol MAX MIN In normal measurement mode the max min measurements are recorded as a background task The store is reset when the instrument is switched on or can be reset at any time Resetting the Maximum Minimum Store Proceed as follows 1 Make sure the instrument is in measurement mode and displaying pressure or al...

Page 30: ...Issue No 1 22 DPI 740 User Manual Figure 3 7 MAX MIN menu FILTER MORE MAX MIN MORE return to pressure measurement mode F2 F1 F2 F1 F1 F2 F1 F1 F2 F1 F2 MAX MIN MIN OFF MAX OFF max value units min value units ...

Page 31: ...menu 3 Press F1 to view process options 4 Press F2 until the status line shows MAX MIN 5 Press F1 to view max min options 6 Select MAX F1 or MIN F2 the status line shows the recorded value 7 Press F1 then F2 to switch off either the maximum or minimum value Press F1 twice to view the other maximum or minimum value Note The Max Min options must be reselected after changing to another measurement mo...

Page 32: ...K0200 Issue No 1 24 DPI 740 User Manual intentionally left blank ...

Page 33: ...rument enters set up menu reset MAX MIN store MAX MIN function set filter window FILTER function Carry out a one point calibration Carry out a two point calibration Set baud rate data bits stop bits parity and handshaking set time out period time in minutes enable disable time out configure TIME OUT Note Using the MODE push button steps back one menu selection configure units of pressure measureme...

Page 34: ...mentbetween three preselected units held in nonvolatile memory When shipped the instrument s units of pressure measurement are mbar inHg and hPa These units of pressure measurement can be change to any from the following list 0 mbar 12 cmH2O 1 bar 13 mH2O 2 Pa 14 torr 3 hPa 15 atm 4 kPa 16 psi 5 MPa 17 lbf ft2 6 kgf cm2 18 inHg 7 kgf m2 19 inH2O20 20ÐC 8 mmHg 20 inH2O04 4ÐC 9 cmHg 21 ftH2O20 20ÐC ...

Page 35: ...Note 1 The storing of the new units takes place when the SET push button is pressed for the third unit The indicator then returns to the pressure measurement mode with the three new units stored and available on push button F2 Note 2 Pressing the MODE push button steps the menu back one setting allowing reselection of the unit Units of Altitude Measurement Whentheindicatoris inaltitudemeasurementm...

Page 36: ...s 1 The time out function is disabled in calibration mode 2 When switching the instrument on the time out can be disabled by pressing MODE and on off push button together Adjusting the Time out Period Proceed as follows 1 Make sure the instrument is in measurement mode and displaying pressure 2 Press SET until the status line shows TIME_OUT 3 Press F1 to select time out settings 4 Use F1 and F2 to...

Page 37: ...gs select the sub menu and press the SET key to step through the sub menu 4 Pressing the MODE push button returns the instrument to the previous setting Setting the communication parameters Figure 3 9 Proceed as follows 1 Make sure the instrument is in measurement mode and displaying pressure 2 Press SET until the display shows COMMS on the status line 3 Press F2 selecting the COMMS option 4 Use F...

Page 38: ...0200 Issue No 1 30 DPI740 UserManual Figure 3 9 Communications set up Baud Rate Data Bits Stop Bits Parity HShake Exit set up display returns to pressure measurement SET SET SET SET F1 F2 F1 F1 F1 F1 SET ...

Page 39: ...laying pressure 2 Press SET until the display shows PIN on the status line 3 Press F2 to change the PIN 4 Using F1 F2 and SET to enter the current PIN 5 Using F1 F2 and SET to enter the new PIN 6 Using F1 F2 and SET to enter the new PIN again The instrument compares the first new PIN with the second new PIN to verify the entry 7 If verified successfully the display briefly shows New PIN Accepted o...

Page 40: ... until the display shows PRINT on the status line 3 Press F1 to select the PRINT menu The display shows the flashing message Ent Print Period This is the rate at which measurements are transmitted by the instrument 4 Use F1 F2 and SET to enter the print period Pressing SET returns the instrument to measurement mode with the instrument transmitting data at the selected rate Error Message When an er...

Page 41: ... instrument is not within the specification carry out a calibration adjustment procedure Themanufactureroffersacomprehensiveand ifrequired NAMAS accredited calibration service Calibration Check A calibration check should be carried out at chosen intervals The readings of the instrument should be compared with a pressure standard and after any adjustments for accuracy traced to National Standards t...

Page 42: ...nu accessed through the set up menu One point calibration For the one point calibration the instrument stores the relationship between pressure and output Important note The calibration carried out at manufacture is a two point calibration againstapressurestandardtraceableto National Standards Carrying out a one point calibration can significantly down grade the instrument s accuracy if in doubt c...

Page 43: ...Enter PIN 123 1 CAL points 2 yes SET VALID no APPLY PRESS P1 ENTER APP PRESS F2 F1 value units APPLY PRESS P1 APPLY PRESS P2 repeat procedure above ENTER APP PRESS F2 F1 value units ENTER CAL DATE F2 F1 01 01 96 ENTER CAL DATE F2 F1 01 01 96 Exit set up display returns to pressure measurement ...

Page 44: ...two point calibration the display prompts for the first calibration point 6 Adjust the pressure standard for the first calibration point 7 Use F1 and F2 to set the first calibration value 8 When the pressure is stable press SET to enter the first calibration point The display prompts for the second calibration point 9 Repeat steps 5 to 7 for the second calibration point 10 Press F1 to accept the c...

Page 45: ...ll scale pressure value the display flashes the message OVERRANGE ERROR Reduce the applied pressure until the error message goes out If the calibration or set up of the transducer or the instrument s operation becomes corrupted the display shows SYSTEM ERROR Return the instrument to the manufacturer or agent for repair 5 3Cleaning Clean the case of the unit with a damp lint free cloth and mild det...

Page 46: ...K0200 Issue No 1 38 DPI740 UserManual ...

Page 47: ...n the commands that apply to the instrument are detailed and described for further information contact Druck Direct Mode One instrument can be connected directly to a control computer with no addressing is required Addressed Mode The instrument can be connected into a network of devices each device has a unique address 0 to 99 The network consistsofaringwiththetransmitlineofonedeviceconnected to t...

Page 48: ...k and can be used for commands such as AA automatic addressing dd is a two digit destination address 00 to 99 ss is a two digit source address 00 to 99 xx is a two character command This can be followed by additional data a number can be added to this command to select a channel CS is a block checksum and takes the form NN where NN is a two digit checksum that is the modulo 100 sumofalltheASCIIcod...

Page 49: ...do not have to be sent with each command example 0099IC PIU 0 CR LF The command separator can be used example 0099IC P IU 0 CR LF This command sent by instrument 99 to instrument 00 to set up input channel to measure pressure and select pressure units of mbar Query facility In addition to sending commands to instruments data can be queried by adding the character to the command example 0099IC CR L...

Page 50: ...er input reading ir time constant 10 band 1 0099iu 0 units to mbar 0099pr get reading from process channel 9900PR1 987 22 reply of pressure in mbar filtered reading 0099ir get unfiltered reading 9900IR 987 22 reply of pressure in mbar 0099iu 18 units to inHg 0099pr get reading from process channel 9900PR1 29 153 filtered pressure reading in inHg 0099fa 0 take QFF addressed iu query units iu 18 uni...

Page 51: ... value filter PC T IR tare PC T IR value PC IR maximum PC IR minimum PC Q IR value value QFF PC A IR value altitude PR Get process reading PA k Enable automatic sending of process reading PM Reset process maximum and minimum values Instrument Set up Commands SA nn Set instrument address SUn units index Set up regular units Calibration Commands CT cal type Specify calibration type CP value temperat...

Page 52: ...omatic device address AE error mask Automatic error reporting Read Commands RB Read battery volts RI Read instrument type and version number RE Read error status Protocol Format Commands FC flag Enable disable message checksum FA flag Enable disable addressed mode Key Commands KM flag Front panel key pad operating mode ...

Page 53: ...pe the index i specifies the measurand param type can be any of the following P pressure input I current input V voltage input T temperature input Note Only use pressure P for this instrument Query The corresponding query command allows the interrogation of the currently selected parameter Example IC The instrument replies IC P input pressure Command IR Get input reading Format IR Description Requ...

Page 54: ...IU index Example a reply of IU 18 means units are inHg Command IA Enableautomaticsendingof input reading Format IA k Description Enables automatic sending of input reading The value k corresponds to send every k th conversion If k is 0 the automatic send feature is disabled Example IA 10 send a value every 10th conversion IA 0 disable the automatic feature Query A query responds with an integer of...

Page 55: ...lowing table Process definitions Example filter PC IR 0 15 0 01 Definefilterinputreadingchangingthe time constant and band Note This filter does not affect the normal instrument filter PC process definition Set up Process PC IR value value filter PC T IR value tare PC IR maximum PC IR minimum PC Q IR value value QFF PC A IR value altitude PR Get process reading PA k Enable automatic sending of pro...

Page 56: ...ed value Example minimum PC IR Defines the minimum value of the input reading To reset this value use PM command Example maximum PC IR Defines the maximum value of the input reading To reset this value use PM command Example Q QFF PC Q IR 200 20 Define the derived QFF input value changing both the height and temp parameters Example A altitude also see command PA PC A IR 120 00 DefinethederivedALTI...

Page 57: ...corresponds to send every k th conversion If k is 0 the automatic send feature is disabled Example PA 10 send value every 10th conversion PA 0 disable the automatic feature Query A query responds with an integer of the automatic send interval in conversions Example PA Reply PA 10 Command PM Resets process maximum and minimum values also see PC command and Format PM Description Sets maximum and min...

Page 58: ...ry instrument address Reply SA 10 Command SU Set up regular units Format SUn units index Description Selects the pressure units that appear as default selection F2 in measurement mode Both required parameters must be specified i e thepush buttonsequencen 1 2or3 and the units index Example SU1 0 sets first units 1 to mbar SU2 18 sets second units 2 to inHg Query The corresponding query command retu...

Page 59: ...tion Specify the type of calibration to be performed The instrument must be in calibration mode before this command becomes valid cal type 1two pointmatching calibration Example CT 1 perform two point matching calibration Query A query of this parameter CT returns the type of calibration in progress CT query calibration type Reply CT 1 The instrument is now ready for the application of calibration...

Page 60: ...arameter CP returns the number of calibration points already recorded by this command The instrument also indicates that it is ready for the next calibration point Reply example CP 0 no cal points recorded CP 2 2 cal points recorded After entering all the points required to calibrate the instrument the accept calibration command CA must be sent to update the data in the instrument s nonvolatile me...

Page 61: ...mand CA Calibration Accept Format CA Description Accepts the calibrated data If the correct number of calibration points have been entered with the CP command then the calibration coefficients are calculated and stored in the instrument s nonvolatile memory The instrument returns to measurement mode Query There is no associated query command Command CX Calibration abort Format CX Description Abort...

Page 62: ...mbar PP 123 PIN entered put instrument into calibration mode CT 1 perform two point calibration CP 800 applied pressure 800 mbar CP 1100 applied pressure 1100 mbar CA calibration accepted CD calibration date Command PP PIN protection Format PP pin Description This command is used to change the PIN of the instrument which is used to protect the calibration data and configuration pin 123 calibration...

Page 63: ... for this command Command AE Automatic error reporting Format AE error mask Description This command enables error reporting A 16 bit hexadecimal value error mask defines the bit image of errors to be acted on if set If the error occurs the RE error message is automatically error mask is defined in Table 6 1 Note Anautomatic errorresponsedoes not cleartheerror bit The RE command must be issued to ...

Page 64: ... a query only command Command RI Read instrument type and version number Format RI Description Read device equipment this returns the instrumenttypeonthenetworkincludingthe version of the code in the form RI string where the string is in the format DPInnn Vm mm nnn instrument type m mm version and issue number Example RI query instrument version and issue number RI DPI740 V1 10 Query There is a qu...

Page 65: ...rors are stored as bits 16 bits max and set if the error occurred After issuing this command all errors are cleared The error codes are defined in Table 6 1 Note Errors are only set for commands sent to the instrument Allothercommandsareignored where the string is in the format Example RE reports errors RE 0000 no errors since last report Query There is a query only command ...

Page 66: ...checksum feature FC 1 enable checksum feature Query There is no corresponding query command Command FA Enable disable addressed mode Format FA flag Description Format addressing mode command Enables disables the addressed mode feature of the data transactions When addressed mode is disabled one to one communication direct mode is assumed flag 0 disable addressed mode 1 enable addressed mode Exampl...

Page 67: ...button mode so that the instrument can be operated remotely This command locks unlocks the push buttons Example KM L local mode push buttons enabled KM 2 remote mode push buttons disabled Query The query command returns the local remote status KM query operating mode Reply KM L operating in local mode or KM R operating in remote mode ...

Page 68: ...this error is reported 3 address error An invalid address packet was received 4 checksum The received command checksum did not match error with the calculated checksum With this error the command is not executed and this error reported 5 zero error An error occurred while trying to zero a measurand probably because the zero offset is too large 6 calibration Error in the instrument s calibration pr...

Page 69: ...nits of measurement are defined below and are used by the IU and SU commands 0 mbar 1 bar 2 Pa 3 hPa 4 kPa 5 MPa 6 kgf cm2 7 kgf m2 8 mmHg 9 cmHg 10 mHg 11 mmH2O 12 cmH2O 13 mH2O 14 torr 15 atm 16 psi 17 lbf ft2 18 inHg 19 inH2O20 20 C 20 inH2O04 4 C 21 ftH2O20 20 C 22 ftH2O04 4 C 23 inH2O60 60 F 70 metres 71 feet ...

Page 70: ...ng None Databits 8 Stopbits 1 PRINT PRINT The PC serial comms port used is COM PRINT port PRINT PRINT Please note DOS File Name Pressure Readings will be Logged in this File PRINT INPUT Nm PRINT PRINT Ready PRINT Press CTRL BREAK to exit PRINT Starting communications OPEN Nm FOR OUTPUT AS 2 IF port 2 THEN OPEN COM2 9600 N 8 1 RS RB6000 FOR RANDOM AS 1 ELSE OPEN COM2 9600 N 8 1 RS RB6000 FOR RANDOM...

Page 71: ...sure LEFT pressure 8 PRINT Pressure of the Day is pressure mbar CHR 13 PRINT 1 address 99 ir CHR 13 PRINT 2 address 99 ir CHR 13 CHR 10 GOSUB GetReply PRINT 1 address 99 iu 18 CHR 13 PRINT 2 address 99 iu 18 CHR 13 CHR 10 PRINT 1 address 99 pr CHR 13 PRINT 2 address 99 pr CHR 13 CHR 10 GOSUB GetReply pressure RIGHT a 10 pressure LEFT pressure 8 PRINT Pressure of the Day is pressure inHg CHR 13 PRI...

Page 72: ...K0200 Issue No 1 64 DPI 740 UserManual Approved Service Agents www gesensing com ...