DH Instruments E-DWT-H Operation And Maintenance Manual Download Page 20

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E-DWT-H OPERATION AND MAINTENANCE MANUAL

Page 10

1.3.5.2 Dual Q-RPT E-DWT-H Schematic

Reservoir vent valve

Priming pump

Reservoir

Lo Q-RPT pressure relief valve

Lo Q-RPT (ref pressure transducer)

Hi Q-RPT (ref pressure transducer)

TEST port1 (top)

TEST port 2 (rear)

Test shut off and fine adjustment valve

Lo Q-RPT shut off valve

Reservoir shut off valve

Variable volume (screw press)

Figure 9.

E-DWT-H with dual Q-RPTs hydraulic schematic

Summary of Contents for E-DWT-H

Page 1: ...2009 DH Instruments a Fluke Company E DWT H Electronic Deadweight Tester Operation and Maintenance Manual...

Page 2: ...nsure accuracy and quality of its published materials however no warranty expressed or implied is provided DH Instruments disclaims any responsibility or liability for any direct or indirect damages r...

Page 3: ...Hydraulic Schematic 9 1 3 5 1 Single Q RPT E DWT H Schematic 9 1 3 5 2 Dual Q RPT E DWT H Schematic 10 2 Installation 11 2 1 Unpacking and Inspection 11 2 1 1 Removing from Packaging 11 2 1 2 Inspect...

Page 4: ...Average 37 3 7 7 2 Rate 38 3 7 7 3 DEV Deviation 39 3 7 7 4 RPT 40 3 7 7 5 HI LO 41 3 7 7 6 Freeze 41 3 7 7 7 Clean 42 3 7 8 HEAD 42 3 7 9 SDS 44 3 7 10 AUTOZ 44 3 7 11 ENT AutoTest Run AutoTest 45 3...

Page 5: ...5 3 1 1 PA and PM Coefficients 99 5 3 2 Equipment Required 99 5 3 3 Set Up and Preparation 100 5 3 4 Recommended Calibration Point Sequence 100 5 3 5 RPT Calibration Using CalTool for Q RPTS Software...

Page 6: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page IV Notes...

Page 7: ...able 6 Security levels 64 Table 7 UNIT function available units of measure 66 Table 8 READRT display update rates 68 Table 9 Reset Sets 70 Table 10 Reset Cal 71 Table 11 Reset All 71 Table 12 COM1 pin...

Page 8: ...nitor rear view 8 Figure 6 Battery charger pack front and rear 8 Figure 7 E DWT H dimensions 9 Figure 8 E DWT H with single Q RPT hydraulic schematic 9 Figure 9 E DWT H with dual Q RPTs hydraulic sche...

Page 9: ...t unexpected E DWT H behavior based on the symptom of that behavior Note For those of you who don t read manuals go directly to Section 2 3 to set up your E DWT H and then go to Section 3 1 4 for a ty...

Page 10: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page VIII Notes...

Page 11: ...ght testers The E DWT s electronic reference pressure monitor is a special version of DHI s RPM4 designated RPM4 E DWT RPM4 E DWT can be configured with one or two high precision quartz reference pres...

Page 12: ...on oils propylene glycol fully fluorinated liquids partially fluorinated liquids isopropyl alcohol distilled water Reservoir capacity 300 cc 18 in 3 Variable volume displacement Standard vv 3 cc 0 18...

Page 13: ...erence pressure transducer Q RPT modules to measure pressure see Table 1 The Lo Q RPT cannot be greater than A40M The Q RPTs are intrinsically absolute operating against a sealed vacuum reference Gaug...

Page 14: ...t k 2 assuming regular use of AutoZero function and short term stability between rezeroing As stability can only be predicted and varies from Q RPT to Q RPT stability for a specific Q RPT should be es...

Page 15: ...Q RPT E DWT A TEST1 port DH500F B Reservoir cap C Priming pump D Reservoir cap vent valve E Reference pressure monitor RPM4 E DWT F Test shut off valve and fine pressure adjustment G Reservoir shut of...

Page 16: ...alve E Reference pressure monitor RPM4 E DWT F Test shut off valve and fine pressure adjustment G Lo Q RPT shut off valve position prompt LED H Lo Q RPT shut off valve I Lo Q RPT active valve position...

Page 17: ...F Footswitch remote ENT connection footswitch not included G TEST2 connection DH500 F Figure 3 E DWT H rear view 1 3 2 RPM4 E DWT Reference Pressure Monitor Views 1 3 2 1 Front Panel A Pressure ready...

Page 18: ...RPT H ATM pressure port Lo Q RPT I ATM pressure port Hi Q RPT J Product label bottom of case Figure 5 RPM4 E DWT reference pressure monitor rear view 1 3 3 Battery Charger Pack Views A Cooling fan B...

Page 19: ...aulic Schematic 1 3 5 1 Single Q RPT E DWT H Schematic A Reservoir vent valve B Priming pump C Reservoir D Hi Q RPT ref pressure transducer E TEST1 port top F TEST2 port rear G Test shut off and fine...

Page 20: ...B Priming pump C Reservoir D Lo Q RPT pressure relief valve E Lo Q RPT ref pressure transducer F Hi Q RPT ref pressure transducer G TEST port1 top H TEST port 2 rear I Test shut off and fine adjustmen...

Page 21: ...s all items listed in Table 2 Table 2 E DWT H packing list DESCRIPTION PART NO E DWT H electronic deadweight tester 3390864 ACCESSORIES 3389701 3389712 CE 1 ea Power cord 7 5 ft 3133781 3153005 CE 1 e...

Page 22: ...able volume handles into the variable volume hub on the front of the E DWT H Leave the stainless steel plug in the top and rear TEST1 and TEST2 ports Check that the glands holding the plugs are tight...

Page 23: ...zeroed If the display fails to zero properly the RPM4 E DWT may need repair Note It is normal for RPM4 E DWT to indicate a value other than zero when vented when gauge mode is first entered or ranges...

Page 24: ...and control check following the instructions in Section 5 4 3 Open the reservoir vent valve by rotating it CCW Open the reservoir shut off valve Set the variable volume to start position Rotate variab...

Page 25: ...the E DWT H pressure generation and control system Use RANGE see Section 3 7 2 to select the Hi Q RPT Note If the red CAUTION indicator flashes and or an audible alarm sounds at any time immediately...

Page 26: ...re followed carefully it is not necessary to empty the reservoir prior to shipment IMPORTANT Close the reservoir cover fully by rotating it CW until snug IMPORTANT Close the reservoir shut off valve o...

Page 27: ...ble on the RPM4 E DWT are accessed using RANGE see Section 3 7 2 and or created using AutoRange see Section 3 7 5 An RPM4 E DWT range is identified by a range screen showing the Q RPT used by the rang...

Page 28: ...tability rate of change of pressure is less than the stability limit The stability limit is set automatically by AutoRange or AutoTest see Sections 3 7 5 3 1 3 It can also be set by the user see Secti...

Page 29: ...ter the last pressure return to zero by opening the reservoir shut off valve The RPM4 E DWT indication may not be zero if the DUT reference height is different from the E DWT H reference height 3 2 Te...

Page 30: ...ours for the battery to charge fully When the battery charger power switch is in the ON position the battery is connected to the charger not the 12VDC output When the battery charger switch is in the...

Page 31: ...T is active the Lo Q RPT must be isolated from the E DWT s pressure generation and control system to avoid destroying it by overpressure The E DWT s Lo Q RPT shut off valve and visual and audible indi...

Page 32: ...Q RPT ACTIVE displayed by RPM4 E DWT Lo Q RPT IS active and the Hi Q RPT is selected on RPM4 E DWT The Lo Q RPT should NOT be exposed to pressure when the Hi Q RPT is selected Exposing the Lo Q RPT to...

Page 33: ...ve and fine pressure adjustment G Lo Q RPT shut off valve position prompt LED H Lo Q RPT shut off valve I Lo Q RPT active valve position prompt LED J Lo Q RPT active caution indicator K Reservoir shut...

Page 34: ...re Generation And Adjustment E DWT H has three means for generating and adjusting pressure including filling and priming the test system The reservoir pump is used to fill and prime the test system se...

Page 35: ...off valve to connect the reservoir to the test system Pull the reservoir priming pump knob up slowly to fill it with oil from the reservoir Then push the knob down firmly with moderate speed to seal...

Page 36: ...e TEST shut off valve to connect the variable volume to the test system If the E DWT H is dual Q RPTs check that the RPM4 E DWT Q RPT selection and Lo Q RPT shut off valve setting are correct for the...

Page 37: ...optimum balance between simple straight forward operation and the availability of a wide variety of functions with a high level of operator discretion if desired The RPM4 E DWT s local operator inter...

Page 38: ...Lo Lo Q RPT only if dual Q RPT model 3 1 1 7 nn nn Sequence progress indicator Indicates progress of AutoTest sequence during test execution NN NN Number of this point over total number of points in...

Page 39: ...r Pressing ENT generally causes execution or forward movement in the menu tree Pressing ESC moves back in the menu tree and or causes execution to cease or suspend Pressing ESC repeatedly eventually r...

Page 40: ...Hi Q RPT is selected but Lo Q RPT is being pressurized dual Q RPT model RPM4 E DWT only Intermittent two second high frequency beep The audible alarm is combined with flashing of the red Lo Q RPT Acti...

Page 41: ...RANGE PURPOSE To view and or change the active pressure measurement range and associated settings PRINCIPLE An RPM4 E DWT range is defined as a pressure span and associated settings see Section 3 1 1...

Page 42: ...PM4 E DWT settings and functions are range specific See Table 3 for identification of range specific settings For best metrological performance vent and AutoZero the RPM4 E DWT Q RPT before changing r...

Page 43: ...de is always gauge difference from atmospheric pressure 3 7 5 AUTORANGE PURPOSE To automatically set up the RPM4 E DWT to optimize its measurement characteristics and features for a specific user defi...

Page 44: ...er the full scale pressure value in the entry field and press ENT If the full scale value entered exceeds the maximum of RPM4 E DWT an error message appears View proposed AutoRange range The proposed...

Page 45: ...ck first set the pressure to the desired leak check pressure Note Changing the pressure in a test system causes adiabatic temperature changes in the pressurized medium that need to have dissipated bef...

Page 46: ...which the leak check was run 3 7 7 Display PURPOSE To select from a variety of choices the information that is displayed on the second line of the RPM4 E DWT display PRINCIPLE RPM4 E DWT supports a v...

Page 47: ...RATION To set the DISPLAY function press DISPLAY from the main run screen The display is 1Avg 2Rate 3Dev 4RPT 5Hi Lo 6Freez 7Cln The cursor is on the active DISPLAY function Selecting a DISPLAY functi...

Page 48: ...taneous values Average screen Note Pressing ENT while in the Average DISPLAY aborts the current averaging period and causes a new one to begin ENT can thus be use to trigger a new averaging period on...

Page 49: ...he Ready Not Ready condition The Rate DISPLAY is the default RPM4 E DWT main run screen display To go to a DISPLAY other than Rate press DISPLAY and make a new DISPLAY choice see Section 3 7 7 3 7 7 3...

Page 50: ...Y the Q RPT displayed on the top line of the display when the Q RPT function is selected is referred to as the active Q RPT The other Q RPT to be displayed on the second bottom line of the RPM4 E DWT...

Page 51: ...nd returns to the main run screen with the Hi Lo DISPLAY active With the Hi Lo DISPLAY active the main run screen is 1 Highest pressure observed since Hi Lo reset 2 Lowest pressure observed since Hi L...

Page 52: ...Y other than Freeze press DISPLAY and make a new DISPLAY choice see Section 3 7 7 The AutoTest function uses the Freeze display to capture the measured pressure value when ENTER is pressed at the test...

Page 53: ...DWT H TEST port and another height Entering a height of zero turns the function off The height units and the test medium can be changed using SPECIAL 3Head see Section 3 9 3 Note An oil head has a pr...

Page 54: ...a full explanation of the AutoZ function The RPM4 E DWT should be zeroed prior to running a calibration or test with the E DWT OPERATION Note For the AutoZ function key to run AutoZ AutoZ must be tur...

Page 55: ...ttings appropriate for the tolerance of the DUT Step the operator through a planned sequence of test pressure increments if desired Alert the operator to possible out of tolerance conditions at each t...

Page 56: ...increments don t execute See OPERATION in this Section for information on running a Quick or File AutoTest See Section 3 8 5 2 for information on setting up File AutoTest files See Section 3 8 5 1 for...

Page 57: ...ull scale and run down to zero 3u d for the sequence to run from zero to the DUT full scale and back to zero 4d u for the sequence to run from the DUT full scale down to zero and back to the DUT full...

Page 58: ...cates the Set nnnn value Once the specified pressure has been set press ENT If the RPM4 E DWT pressure reading is in Not Ready pressure not stable condition see Section 3 1 2 the RPM4 E DWT makes an i...

Page 59: ...AutoTest files and view data files resulting from running AutoTests See Section 3 8 5 3 8 1 1RANGE PURPOSE Save AutoRange ranges and associated settings for recall Delete previously saved AutoRange ra...

Page 60: ...re any saved ranges available to delete the display is 1 Indication that the cursor control keys may be used to toggle through the saved ranges to select the one to be deleted 2 Designator and positio...

Page 61: ...ization see Section 3 7 11 OPERATION To access the resolution function press SETUP 2res The display is 1 Full Scale 2 Reading The cursor is on the current setting Select the desired resolution style T...

Page 62: ...NCIPLE The UPPER LIMIT function provides the user with a settable pressure limit at which an alarm sounds When the limit is reached RPM4 E DWT s beeper sounds intermittently as long as pressure is abo...

Page 63: ...function causes the measured pressure display to flash and a steady beep to sound The overpressure function also logs the time and date of the overpressure condition in both user and factory logs to...

Page 64: ...int number over the total number of test points in the Sequence OPERATION To access the AutoTest results data file viewing function press SETUP 5ATest 1data The first display is the data file header w...

Page 65: ...to run an AutoTest File AutoTest parameters are stored in definition files SETUP 5AutoTest 2file allows File AutoTest definition files to be viewed and edited Up to 40 File AutoTest definition files w...

Page 66: ...acy as desired of the DUT to be calibrated using this File AutoTest The value entered will be used along with the DUT full scale to determine RPM4 E DWT AutoRange settings when the AutoTest is run see...

Page 67: ...d barometer calibration coefficients see Sections 3 9 8 5 2 2 9reset Access RPM4 E DWT s various reset functions see Section 3 9 9 3 9 1 1AUTOZ PURPOSE To turn ON and OFF the AutoZ function that allow...

Page 68: ...atmospheric pressure using the RPM4 E DWT s on board barometer is no longer active AutoZ should be left on at all times unless the RPM4 E DWT s on board barometer is inoperable OPERATION Note The Aut...

Page 69: ...OPERATION To access the communications settings press SPECIAL 2Remote Select 1COM1 to view and edit COM1 settings see Section 3 9 2 1 Select 2COM2 to view and edit COM2 settings see Section 3 9 2 1 Se...

Page 70: ...self test can help establish that the RPM4 E DWT COM1 port you are trying to communicate with and the interface cable you are using are good To run a self test of the RS232 ports COM1 and COM2 press S...

Page 71: ...PM4 E DWT operational preferences and functions OPERATION To access the PREFS menu press SPECIAL 5prefs The display is 1ScrSvr 2sound 3time 4ID 5level The PREFS menu includes 1ScrSvr View and change t...

Page 72: ...ee choices or it may be completely suppressed Invalid key presses are indicated by a descending two tone blurp which cannot be suppressed OPERATION To access the keypad sound adjustment function press...

Page 73: ...s for the trailing characters if the ID being entered is less than twelve characters After the last of the twelve characters has been entered the Save ID option is offered Select 1no to return to the...

Page 74: ...operating parameters It is intended to minimize operator choices for example to perform repeated identical calibrations under consistent conditions Note RPM4 E DWT is delivered with the security level...

Page 75: ...r is on the current restriction level Select a different level or or ESC back to the MAIN RUN screen If no password is active selecting 2edit password displays the user password and allows it to be ed...

Page 76: ...UNIT function key to support his her most commonly used units Up to six units can be included in the UNIT screen OPERATION To customize the UNIT function key press SPECIAL 6Punit from the MAIN RUN scr...

Page 77: ...iew the RPM4 E DWT incident log see Section 3 9 7 5 3 9 7 1 1BARO PURPOSE To view the value of atmospheric pressure as measured by the RPM4 E DWT on board barometer PRINCIPLE RPM4 E DWT A70M A7M AF is...

Page 78: ...unction is ON three pressure rate of change dependent read rates are used The result is three display update rates Table 8 READRT display update rates PRESSURE RATE OF CHANGE DISPLAY UPDATE 3 of range...

Page 79: ...s 3 9 8 8CAL PURPOSE To calibrate the RPM4 E DWT Hi and Lo Q RPTs and adjust the on board barometer These functions are considered part of RPM4 E DWT maintenance and are covered in the maintenance sec...

Page 80: ...erfaces or AutoRange ranges The Reset Sets resets are itemized in Table 9 Table 9 Reset Sets RESET RESULT SEE SECTION UNIT Pressure unit of measure to first of the six available 3 7 3 RANGE Hi Q RPT d...

Page 81: ...e Set all dates to 19800101 5 3 7 5 2 2 AutoZ value 101325 Pa Gxxx BGxxx Q RPTs All Poffset values to zero 3 9 1 AutoZ function ON all Q RPTs 3 9 1 3 9 9 5 5 All PURPOSE Note The reset all function cl...

Page 82: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page 72 Notes...

Page 83: ...unit 4 2 1 RS232 Interface 4 2 1 1 COM1 The RPM4 E DWT 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 is transmitted out of...

Page 84: ...tion 3 9 2 3 or remotely using the L2 or L3 program message see Section 4 4 4 The MSGFMT command can also be used to select the format but is not recommended for new designs The main difference betwee...

Page 85: ...is cleared every time a new program message is received Examples COM1 enhanced mode command CLS or CLS Clear the error queue Wait for reply UNIT KPA or UNIT KPA Generates a reply User must wait for r...

Page 86: ...Return control to the RPM4 E DWT front panel MEM Read the power up memory test status MSGFMT Read or set the type of program message format to use PCALn Read or set the user Lo Q RPT calibration info...

Page 87: ...rpressure may result ERR 13 Text queue overflow ERR 14 User unit not defined ERR 17 Not used ERR 18 Command not yet available ERR 19 Not available with absolute units ERR 20 Not available with gauge d...

Page 88: ...ds support an optional suffix This suffix is used to specify a Q RPT to which the command applies since many settings are Q RPT specific Suffix of 1 for Hi Q RPT access Suffix of 2 for Lo Q RPT access...

Page 89: ...t is terminated with a carriage return Line feeds are discarded This will discontinue when the next query is sent to the RPM4 E DWT There is no other reply from this program message Prior to using thi...

Page 90: ...rement mode specified The reply indicates the current range data including the Q RPTLabel used for the range If inWa is specified for the unit the temperature reference can be given after the unit tex...

Page 91: ...pressure The RPM4 E DWT reference pressure Tolerance The tolerance in pressure Example Cmd sent Reply ATESTDATA1 150 00 150 34 0 50 Errors ERR 10 ERR 52 No data exists for this file index End of test...

Page 92: ...E DWT AutoZ function can be remotely run with this command only if AutoZero is ON You should ensure that the pressure is stable for valid determination of Zoffset Example enhanced Cmd sent Query reply...

Page 93: ...ly 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 Missing or improp...

Page 94: ...rical only format YYYYMMDD Remarks The RPM4 E DWT has an internal real time calendar clock The span of acceptable dates ranges from 19800101 to 20791231 The reply is always in the YYYYMMDD format Exam...

Page 95: ...tion label Command Query ID string ID Classic ID string ID Arguments String An alphanumeric string up to 12 characters long Remarks The user defined ID label can be used to allow the user to tag the R...

Page 96: ...DWT data corrupted and was set to factory defaults 1 The memory was found to be OK on power up Example classic Sent Reply MEM MEM 0 RPM4 E DWT data corrupted and was set to factory defaults MEM 1 The...

Page 97: ...20011201 2 10 Pa 1 000021 20011201 No reply if GPIB 488 Example 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...

Page 98: ...0 011 kPa s 97 000 kPa g See Also PR QPRR SR 3 6 1 3 1 2 3 9 7 1 QPRR Purpose Read the last Q RPT pressure measurement pressure rate and on board barometer output immediately Query QPRR Classic QPRR O...

Page 99: ...d of RptLabel 1 Specify the Hi Q RPT 2 Specify the Lo Q RPT Remarks The next available pressure rate of change in the current pressure unit per second is returned After receiving this program message...

Page 100: ...not a 0 or a 1 See Also SR 3 1 2 REMOTE Purpose Lock out the front panel keypads during remote operation Command REMOTE Classic REMOTE Remarks The RPM4 E DWT goes into remote mode whenever communicati...

Page 101: ...RptLocator Text field identifying the Q RPT position in the RPM4 E DWT system IH identifies this as an internal Hi Q RPT IL identifies this as an internal Lo Q RPT Serial The serial number of the Q RP...

Page 102: ...is finished 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...

Page 103: ...Query TIME hh mmXX TIME Classic TIME hh mmXX TIME Arguments hh mm XX The time in a 12 hour format using a colon delimiter am or pm Example enhanced Cmd sent Query reply TIME 12 52PM 12 52pm No reply...

Page 104: ...ors See Also 3 9 6 3 7 3 ULn Purpose Read or set an upper limit for the specified or active Q RPT Command Query Uln limit Uln Classic Uln limit ULn Optional Suffix n A suffix may be used instead of Rp...

Page 105: ...is always g for gauge mode White spaces precede this character if needed The temperature reference is added to the reply only if the unit is InWa The reply includes the measurement mode character in...

Page 106: ...mode Pa The Q RPT pressure offset for absolute measurement mode Pa The Q RPT pressure offset for differential measurement mode Pa Note the AbsOffset DifOffset are not used in this model Remarks The pr...

Page 107: ...raining facilities to become thoroughly familiar with E DWT H operation For rapid assistance in specific situations see Chapter 6 for troubleshooting information Unauthorized service or repair of E DW...

Page 108: ...T rear panel Q RPT modules 10 32 UNF The operating span of the barometer is 10 psi 70 kPa to 16 psi 110 kPa Never apply a pressure greater than 110 kPa 16 psi to the barometer port Overpressure and po...

Page 109: ...e only and the Q RPT is zeroed at the time of calibration and frequently rezeroed during calibration PA should not be significantly different from zero Each Q RPT has its own unique PA and PM values T...

Page 110: ...r coned and left hand threaded 1 4 in OD tube equivalent to AE F250C HIP HF4 etc Plug the other test port In dual Q RPT E DWTs the E DWT H TEST port connects to BOTH of the RPM4 E DWT Q R RPTs see Fig...

Page 111: ...the General Accessories Disk and can be downloaded from www dhinstruments com 5 3 6 Editing and Viewing Q RPT Calibration Information PURPOSE View and or edit Q RPT calibration information fields incl...

Page 112: ...edit mode goes to confirmation of change activation if changes have been made in any of the calibration screens Pressing ESC in any edit screen exits the edit screen without activating any changes No...

Page 113: ...reference level TEST port the value of PA should be very close to zero Press SPECIAL 8Cal 1Hi Q RPT or 2Lo Q RPT 2edit and write the new calibration date and the new values of PA and PM for the Q RPT...

Page 114: ...M4 E DWT software please report it with complete details by email to cal repair dhinstruments com Note The DHI flash software loading utility and RPM4 E DWT embedded software are available for downloa...

Page 115: ...oard supports a Motorola 68302 micro controller EPROM EEPROM 128k x 16 bit NVRAM 8 Mbit flash memory RS 232 and IEEE 488 2 communications keypad and display control An I O port controls other ports an...

Page 116: ...quency of a quartz tuning fork in response to changes in temperature and mechanical stress resulting from the change in pressure applied to a connecting bellows or bourdon tube Two independent quartz...

Page 117: ...enough resolution Resolution setting needs to be changed Change resolution setting using the resolution function using AutoRange or by initializing an AutoTest 3 8 2 3 7 5 3 7 11 Can t increase resolu...

Page 118: ...eous value Average DISPLAY 3 7 7 3 7 7 1 These is a leak in the pressure system to which E DWT H is connected Find and correct leak Consider using RPM4 E DWT leak check function 3 7 6 The pressure app...

Page 119: ...open Familiarize yourself with your E DWT H schematic Close reservoir shut off valve 3 5 Too much air in test system to which E DWT H is connected The test system must be filled with oil and primed b...

Page 120: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page 110 Notes...

Page 121: ...essure unit of measure conversion coefficients TO CONVERT FROM Pa To MULTIPLY BY Pa Pascal 1 0 Mbar millibar 1 0 E 02 hPa hecto Pascal 1 0 E 02 kPa kilo Pascal 1 0 E 03 Bar Bar 1 0 E 05 mmWa 4 C milli...

Page 122: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page 112 Notes...

Page 123: ...anty such indirect damage includes but is not limited to loss of production profits revenue or goodwill even if DH Instruments has been advised of the possibility thereof and regardless of whether suc...

Page 124: ...E DWT H OPERATION AND MAINTENANCE MANUAL 2009 DH Instruments a Fluke Company Page 114 Notes...

Page 125: ...ositive direction above atmosphere Head A difference in height between the RPM4 E DWT reference level and the DUT HiLo A DISPLAY function in which the highest and lowest pressure measurements since re...

Page 126: ...ed pressure is the average of their measurements SDS Self Defense System A system to protect Q RPTs from overpressure made up of isolation and vent valves and internal operating logic SDS is not used...

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