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PPCK+™ Operation and Maintenance Manual

DH Instruments, Inc

Page 48

The autozeroing function uses four parameters:

ZSTD:

The value of the autozero reference pressure as indicated by the reference

autozero device.

absolute measurement mode

, the autozero pressure is usually a pressure value

near atmospheric pressure and the ZSTD value can be supplied either: a) by
manual entry; b) automatically from a

DHI

RPM connected to the PPCK+ COM2 port.

gauge measurement mode

, the autozero pressure is always zero (atmospheric

pressure) which is supplied by definition when the RPT is vented to atmosphere.

ZCURERR:

The difference between ZSTD and the RPT indication at the autozero

pressure

at some time after the calibration of the RPT

(ZCURERR = RPT w/out

ZOFFSET - ZSTD).

ZNATERR:

The difference between ZSTD and the RPT indication at the autozero

pressure

just after the RPT has been calibrated

. This is referred to as the

natural

error

at the autozero pressure. Because no RPT is perfectly linear and ZSTD is not

perfectly accurate, the disagreement between the RPT reading and ZSTD at the
autozero pressure is unlikely to ever be zero.

ZOFFSET:

ZCURERR corrected for ZNATERR, represents the drift of the RPT

relative to the reference (ZOFFSET = ZCURERR - ZNATERR). The current RPT
reading, adjusted by ZOFFSET, is the

autozeroed

RPT reading (e.g., the RPT

reading corrected for zero drift since it was calibrated). In

gauge

mode, ZOFFSET

also includes the value of atmospheric pressure that is being subtracted to arrive at
gauge pressure.

The AutoZ function manages the determination, storage and application of
ZNATERR and ZOFFSET individually for each PPCK+ range and measurement

mode.

AutoZ ON/OFF

The AutoZ function can be turned ON and OFF. When AutoZ is ON, the ZOFFSET is
always applied to the pressure measured by PPCK+. When AutoZ is OFF, ZOFFSET is
not applied (except for an absolute RPT in

gauge

mode for which ZOFFSET is the

current value of atmospheric pressure which is always subtracted to achieve
gauge pressure).

Содержание PPCK PLUS

Страница 1: ...2001 DH Instruments Inc PPCK High Pressure Controller Calibrator Operation and Maintenance Manual...

Страница 2: ...owever 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 information in this manual...

Страница 3: ...EQUIREMENTS 8 2 3 INITIAL SETUP 8 2 3 1 PREPARING FOR OPERATION 8 2 3 2 FRONT AND REAR PANELS 9 2 3 2 1 FRONT PANEL 9 2 3 2 2 REAR PANEL ASSEMBLY 10 2 3 3 POWER CONNECTION 10 2 3 4 CONNECTING THE HIGH...

Страница 4: ...RE CONTROL COMMANDS 34 3 2 4 UL UPPER LIMIT 34 3 2 4 1 OVERPRESSURE FUNCTION 35 3 2 5 SEQ SEQUENCE 35 3 2 6 CUSTOM CONTROL 36 3 2 6 1 TURNING OFF CUSTOM CONTROL PARAMETERS 37 3 2 7 HEAD 38 3 2 8 LEAK...

Страница 5: ...ERS 116 5 2 1 PRINCIPLE 116 5 2 1 1 PA AND PM COEFFICIENTS 117 5 2 1 2 SETTING ZNATERR 117 5 2 1 3 ORDER OF OPERATIONS 118 5 2 1 4 AS RECEIVED AS LEFT DATA 118 5 2 2 EQUIPMENT REQUIRED 119 5 2 3 SET U...

Страница 6: ...Control Parameters 34 Table 8 UNIT Function Available Units 55 Table 9 Security Levels 65 Table 10 Pin Designations and Connections 70 Table 11 List of PPCK COM2 DB 9M Pin Designations 70 Table 12 Pro...

Страница 7: ...e Control Keys 19 Figure 5 Pneumatic Schematic 21 Figure 6 Static Pressure Control Operation 23 Figure 7 Dynamic Pressure Control Operation 24 Figure 8 Ready Not Ready in Static Control Mode 26 Figure...

Страница 8: ...er Section 5 provides maintenance and calibration information Section 6 is a quick troubleshooting guide Use it to troubleshoot unexpected PPCK behavior based on the symptom of that behavior For those...

Страница 9: ...CK measures and controls pressure in ranges from 0 to 1 000 psi 7 MPa up to 0 to 10 000 psi 70 MPa in both gauge and absolute measurement modes For pressure ranges of 7 MPa 1 000 psi and below see DHI...

Страница 10: ...5 to meet control specifications Pressure Connections High Pressure Supply DH200 F Test and Drain DH200 F Vent 1 8 in NPT F Drive In 1 8 in NPT F Drive Out 1 8 in NPT F ATM on board barometer 10 32 UN...

Страница 11: ...ows operation at 20 from reference plane without significant effect Measurement Precision1 0 01 Predicted Stability2 90 day 1 year Gauge Mode w Autozero 0 003 0 009 Absolute Mode w Autozero 0 003 0 00...

Страница 12: ...PPCK A6000 0 to 200 cc 50 cc optimal PPCK A10000 0 to 200 cc 50 cc optimal Note Pressure control system will operate in larger volumes but pressure setting times are increased Gas is a compressible fl...

Страница 13: ...e Control Parameters DYNAMIC CONTROL MODE STATIC CONTROL MODE HOLD LIMIT STABILITY LIMIT HOLD LIMIT STABILITY LIMIT 0 01 FS of active pressure range 0 005 FS sec of active pressure range used only whe...

Страница 14: ...PPCK Operation and Maintenance Manual 2001 DH Instruments Inc Page 6 N NO OT TE ES S...

Страница 15: ...1 2 INSPECTING CONTENTS Check that all items are present and have NO visible damage A standard PPCK includes all items indicated in Table 3 Table 3 PPCK Packing List DESCRIPTION PART NO PPCK Pressure...

Страница 16: ...in stable 1 while PPCK is controlling If a gas booster is used to supply high pressure an accumulator is required to dampen the pressure changes caused by the booster cycling Consider using the DHI GB...

Страница 17: ...AND REAR PANELS 2 3 2 1 FRONT PANEL The front panel assembly provides a 2 x 20 vacuum fluorescent display of PPCK operating status and a membrane keypad for local user control 1 Display 3 Manual Press...

Страница 18: ...TM REF 10 32 UNF 2 COM2 Connector 10 DRAIN Port DH200 F 3 IEEE 488 Connector 11 TEST Port DH200 F 4 COM1 Connector 12 VENT Port 1 8 in NPT F 5 Fuse 13 DRIVE OUT Port 1 8 in NPT F 6 Power Switch 14 DRI...

Страница 19: ...THE HIGH PRESSURE SUPPLY TO ANY PORT OTHER THAN THE SUPPLY PORT MAY DAMAGE THE PPCK AND MAY CAUSE OPERATOR INJURY 2 3 5 CONNECTING TO THE DEVICE UNDER TEST TEST PORT The TEST port is for connection o...

Страница 20: ...e connected and properly set for PPCK to operate properly Using a pressure connecting hose of appropriate pressure rating connect the drive pressure supply to the DRIVE IN connection on the rear panel...

Страница 21: ...ration The DRAIN port should occasionally be purged by slowly opening the fitting with approximately 700 kPa 100 psi trapped in the PPCK see Section 5 4 The PPCK DRAIN connection is DH200 F DH200 F is...

Страница 22: ...ED ON see Section 3 1 2 2 Open the TEST port as well to be sure the RPT is exposed to atmospheric pressure Press the UNIT function key and select absolute measurement mode see Section 3 2 2 Change the...

Страница 23: ...e Section 3 2 8 2 4 4 CHECK PROPER PRESSURE CONTROL OPERATION Select a pressure range using the RANGE key see Section 3 2 1 Press the CONTROL function key and select dynamic see Section 3 2 3 Press EN...

Страница 24: ...PPCK Operation and Maintenance Manual 2001 DH Instruments Inc Page 16 N NO OT TE ES S...

Страница 25: ...UNIT Current pressure unit of measure see Section 3 2 2 4 Pressure measurement mode g gauge a absolute see Section 3 2 2 5 Head correction indication Indicates whether a head correction is applied h...

Страница 26: ...aving can be completely suppressed see Section 3 4 4 8 3 1 2 GENERAL OPERATING PRINCIPLES 3 1 2 1 KEYPAD LAYOUT AND PROTOCOL The PPCK has a 4 x 4 keypad for local operator access to direct functions f...

Страница 27: ...e lines that are not visible or directly enter the number of the hidden menu choice if you know it 3 1 2 2 MANUAL PRESSURE CONTROL KEYS The manual pressure control keys provide direct operator control...

Страница 28: ...et 3 or exhaust 11 valve must be opened to admit or exhaust pressure The opening procedure takes 5 to 10 seconds during which PPCK may appear to be idle To notify the operator that the valve opening p...

Страница 29: ...3 VENT Port 1 8 in NPT F 4 HP Inlet Valve Dome Supply Valves 14 TEST Port DH200 F 5 Drive Air Lines 15 DRAIN Port DH200 F 6 DRIVE IN Port 1 8 in NPT F 16 Thermal Pressure Control Unit TPCU 7 Drive Air...

Страница 30: ...rate of change of pressure limit in units of pressure second used as a criterion for the Ready Not Ready condition in static control or when automated control is not active See STATIC CONTROL and DYN...

Страница 31: ...occurs when the current pressure value is within the hold limit and the rate of change of pressure is less than the stability limit see Sections 3 1 2 5 3 2 6 When Ready occurs the reference pressure...

Страница 32: ...imit In dynamic control mode test measurements are made when a Ready condition occurs Ready occurs when the set pressure is within the hold limit The reference pressure value applied to the test syste...

Страница 33: ...ssure Not Ready and decreasing Pressure Not Ready and increasing When pressure control is NOT active A Ready condition occurs any time the pressure rate of change is inside the stability limit The sta...

Страница 34: ...ate of change of pressure is less than the current stability limit Figure 8 Ready Not Ready in Static Control Mode Ready Not Ready In Dynamic Control Mode When dynamic pressure control mode is active...

Страница 35: ...efault for that range or to the last upper limit that was set for that range see Section 3 2 4 In addition most other functions and settings are range specific see Section 3 2 1 1 Each PPCK has three...

Страница 36: ...ION KEYS 3 2 1 RANGE PURPOSE To view and or change the pressure measurement range PRINCIPLE Each PPCK has three ranges see Section 3 1 2 6 Pressing the RANGE function key allows the ranges to be viewe...

Страница 37: ...imit pressure alarm for the active range Not used in PPCK Set custom pressure control parameters hold limit stability limit for the current control mode Shows active range and then toggles through ava...

Страница 38: ...er when used in gauge g or absolute a mode 5 Units of measure the units of measure currently active for the range Range full scale limits are given in the pressure unit that is currently active for th...

Страница 39: ...n For Atmospheric Pressure This allows simple one step switching between gauge and absolute measurement modes by the operator without special procedures or hardware OPERATION To change the pressure un...

Страница 40: ...e 1psi 2MPa 3kPa 4bar 5kcm2 For an SI PPCK the default units are 1MPa 2kPa 3bar 4psi 5kcm2 No reference temperature selection is necessary for the unit mmWa as the only reference temperature commonly...

Страница 41: ...or the active range and set control parameters to the default control parameters press the CONTROL function key from the main run screen The display is Selecting 1static or 2dynamic causes the selecte...

Страница 42: ...10 3 2 4 UL UPPER LIMIT PURPOSE To set the upper limit pressure value for a pressure range and measurement mode PRINCIPLE The UPPER LIMIT function allows the setting of a maximum pressure not to be ex...

Страница 43: ...y to the other For example if you set 4 000 psi as the upper limit in absolute mode the upper limit will not be 4 000 psia atmospheric pressure in gauge mode The gauge mode upper limit for that range...

Страница 44: ...ustomized by the user This can be used to increase control speed time to Ready usually by decreasing control precision or to increase precision which usually decreases control speed see Section 3 1 2...

Страница 45: ...n screen with the custom control parameters active To reset default control parameters for a range and control mode select the control mode using the CONTROL function while in that range Custom contro...

Страница 46: ...dict the pressure actually applied at a different height PPCK can accurately calculate head pressures for nitrogen helium and air as the test gas over its working pressure range The HEAD function allo...

Страница 47: ...be entered as a positive value if the device or system under test is higher than the PPCK and negative if it is lower 3 2 8 LEAK CHECK PURPOSE To run an automated leak check routine using PPCK s meas...

Страница 48: ...eck Leak check is range specific in the sense that leak check is run using the active range However only one set of leak check results is maintained in memory and each leak test completed overwrites t...

Страница 49: ...ution with which the pressure measured by PPCK is displayed can be adjusted This feature can be used to reduce the resolution when lower precision measurements are being made and additional digits mig...

Страница 50: ...2 4 Control initiated using SET P executes in the current control mode Use CONTROL to change control modes see Section 3 2 3 Manual pressure control keys are also available to adjust pressure directl...

Страница 51: ...col see Section 3 1 2 4 until automated pressure control is interrupted Automated pressure control is interrupted by Pressing ESCAPE Suspends control and remains in main run screen Pressing any manual...

Страница 52: ...ment mode is interpreted in the same manner as if the VENT manual pressure control key had been pressed see Section 3 1 2 2 A Ready condition occurs when the vent valve has been opened and the pressur...

Страница 53: ...re in the main run screen or when displaying the target pressure in the set pressure screen causes the target value to increase or decrease by the amount of the current hold limit see Section 3 2 3 Fo...

Страница 54: ...for example solenoid valves in a system that includes PPCK The driver electrical connections are available from a rear panel connector See Section 7 1 for driver specifications and pin outs OPERATION...

Страница 55: ...AUTOZ PURPOSE To change the offset zero of the reference pressure transducer RPT relative to a reference value in order to compensate for RPT zero drift between full recalibrations To assure operatio...

Страница 56: ...rred to as the natural error at the autozero pressure Because no RPT is perfectly linear and ZSTD is not perfectly accurate the disagreement between the RPT reading and ZSTD at the autozero pressure i...

Страница 57: ...resolution and short term stability of the on board barometer rather than its absolute measurement uncertainty allows gauge measurements with an absolute RPT with an additional uncertainty due to poss...

Страница 58: ...ZOFFSET for the current range and mode to be viewed Selecting 3edit allows the value of ZOFFSET for the current range and measurement mode to be edited Selecting 4run allows the routine for determinat...

Страница 59: ...the current range and measurement mode press SPECIAL and select 1AutoZ 3edit The display is 1 Current measurement mode 2 Current range 3 Edit field for value of ZOFFSET The value of ZOFFSET is always...

Страница 60: ...CK measurement range the PPCK and or the source of ZSTD may be out of tolerance or the AutoZ process may have been faulty Before activating a new ZOFFSET greater than 0 015 FS of the current PPCK rang...

Страница 61: ...his execution of run AutoZ Press ENTER to activate the new ZOFFSET for the current range absolute measurement mode and return to the main run screen Press ESCAPE to maintain the old ZOFFSET and return...

Страница 62: ...2 when running AutoZ by COM2 after 6 seconds it will time out and display RPM not detected The value of ZOFFSET is always displayed and entered in Pascal Pa 3 4 2 HEAD PURPOSE To specify the configura...

Страница 63: ...l customize the UNIT function key to support his her six most commonly used units OPERATION To customize the UNIT function key from the main run screen press SPECIAL and select 3PresU The display is 1...

Страница 64: ...w and edit calibration coefficients for the PPCK RPT ranges and on board barometer see Section 3 4 4 2 3Remote to view and edit RS232 COM port and IEEE 488 interface settings see Section 3 4 4 3 4Time...

Страница 65: ...ssure control TPC for very fine pressure control around the target value in dynamic control mode see Section 3 1 2 3 For optimal TPC operation PPCK must have a good estimation of the size of the volum...

Страница 66: ...tine is running Running config flashes on the bottom line of the PPCK display Completing the routine may take up to 2 5 minutes and cause the pressure to change by 0 7 to 1 4 kPa 100 to 200 psi When t...

Страница 67: ...te Select COM1 COM2 or IEEE to view and edit that port s settings Select format to select the remote programming command format to use see FORMAT of this Section COM1 And COM2 The COMx ports can be se...

Страница 68: ...The classic format is compatible with previous PPC products and is the default format The enhanced format follows the syntax format and status reporting features of IEEE Std 488 2 The details of each...

Страница 69: ...ucer Reset functions should be used only by qualified personnel with knowledge of reset consequences Reset functions should never be used experimentally OPERATION To access the reset function press SP...

Страница 70: ...been factory set for SI or US See Sections 3 2 2 and 3 4 3 Reset Seq PURPOSE The SEQUENCE function is not supported in PPCK Reset Cal PURPOSE The reset cal function will delete RPT calibration coeffi...

Страница 71: ...t access to certain functions and to edit the password required for changing user levels PRINCIPLE PPCK s front panel user interface provides the means to access all PPCK user defined data settings an...

Страница 72: ...tion in the system and to assure that the PPCK is operated using consistent operational parameters High This level of security is designed to protect all operating parameters It is intended to minimiz...

Страница 73: ...it SPECIAL menu 4 Internal 5Reset 4cal SPECIAL menu 4Internal 5Reset 5all OPERATION PPCK is delivered with no active password and open access to the User Level menu The user level is set to 1Low User...

Страница 74: ...increments each time a secondary password is used The third field is where the user enters the password The factory secondary password is available in case the user s password has been misplaced or fo...

Страница 75: ...OPERATION To access the screen saver function press SPECIAL and select 4Internal 8ScrSav Edit the screen saver on time in minutes as desired Setting screen saver time to zero eliminates the screen sav...

Страница 76: ...PPCK Operation and Maintenance Manual 2001 DH Instruments Inc Page 68 N NO OT TE ES S...

Страница 77: ...e is received The menus usually accessed from the front panel are locked out while in remote The ESCAPE key returns the PPCK to local operation unless the REMOTE program message was sent to the unit w...

Страница 78: ...off release of the NRFD handshake line until it can service and empty the receive buffer This keeps the buffer from overflowing 4 2 1 3 COM2 The PPCK COM2 RS232 interface is located on the back of th...

Страница 79: ...veral PPCK functions are not supported by PPCK and neither are their corresponding commands see CFG DEVICE DPG ISO PPC HOLD TOUT TS CONFIG This format is recommended only if you need downward compatib...

Страница 80: ...with a semicolon The commands will be queued and executed in as received order If you are using the RS232 port COM1 the Command type will always generate a reply so you must wait for a reply before i...

Страница 81: ...M2 Read or set the configuration of the COM2 port CONFIG Run a TPC configuration routine DATE Read or set the current date DEVICE Obsolete PPC2 Command DF Decrease the pressure quickly DP Decrease the...

Страница 82: ...alue RPMS Obsolete PPC2 command RS Start a fixed rate generation at the rate specified SCRSAV Read or set the front panel screen saver period SETS Specify default or custom generation settings SN Read...

Страница 83: ...t argument is too long ERR 3 User defined coefficient cannot be 0 ERR 4 External device not detected ERR 5 External device improperly configured ERR 6 Numeric argument missing or out of range ERR 7 Mi...

Страница 84: ...must separate them The PPCK will always reply to a Classic program message You must wait for this reply before issuing another program message If this field is not listed in the program message descr...

Страница 85: ...first string received by the PPCK COM2 port that is terminated with a carriage return Line feeds are discarded This will discontinue when the next program message is sent to the PPCK There is no othe...

Страница 86: ...sent Query reply ATM 97 123 kPaa Example classic Sent Reply ATM 97 123 kPaa See Also 3 4 4 7 AUTOZERO Purpose Read or set the status of the automatic zero function Command Query AUTOZERO n AUTOZERO Cl...

Страница 87: ...ERR 7 Missing or improper program message argument s See Also 3 4 4 2 5 3 CAL CAL Purpose Read or set the user RPT pressure RPT calibration Command Query CAL adder mult CAL Classic CAL adder mult CAL...

Страница 88: ...1 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 improper program message argument s See Also 3 4 4 3 PASSTHRU COM2 Purpose Read or set the RS232 s...

Страница 89: ...PPCK pressure must be greater than 1 MPa stable and leak free to execute this configuration Example enhanced Cmd sent Query reply CONFIG CONFIG Example classic Sent Reply CONFIG CONFIG Errors ERR 10 T...

Страница 90: ...ired current pressure units Remarks The PPCK will set a pressure that is lower than the current pressure by the specified amount Example enhanced Cmd sent Reply DP 2 2 000 kPa no reply if IEEE 488 Exa...

Страница 91: ...ives an ERR nn reply or the enhanced mode is enabled using the IEEE 488 interface and an error has been detected the error is put into a FIFO Error Queue The ERR program message pulls and replies the...

Страница 92: ...rks The PPCK can make a head correction to allow it to display the pressure at the test instead of the pressure at the PPCK Example enhanced Cmd sent Query reply HEAD 10 in N2 10 in N2 Example classic...

Страница 93: ...N 0 Stops the pressure increase 1 Starts the pressure increase Remarks PPCK will set and maintain the fast increase pressure rate Care must be used as the pressure will not stop increasing until IF 0...

Страница 94: ...ding the LOCAL program message sending the IEEE 488 GTL command if in enhanced format or by cycling PPCK power Example enhanced Cmd sent Reply LOCAL LOCAL no reply if IEEE 488 Example classic Sent Rep...

Страница 95: ...anced Cmd sent Query reply MODE 1 1 Example classic Sent Reply MODE 1 MODE 1 Errors ERR 6 The argument is invalid See Also 3 1 2 4 3 2 3 3 2 6 MSGFMT Purpose Read or set the type of program message fo...

Страница 96: ...nother device The command format specifies and sends the argument A carriage return and a line feed CR LF are added to the string that is sent The Query format is used to check the PPC2 COM2 receive b...

Страница 97: ...will take affect immediately Example enhanced Cmd sent Query reply PCAL1 HI 2 1 1 000021 961201 2 10 Paa 1 000021 961201 Example classic Sent Reply PCAL1 HI 2 1 1 000021 961201 2 10 Paa 1 000021 9612...

Страница 98: ...The measured pressure for the selected RPT and range in the current pressure units This is followed by the current pressure units rate The measured rate for the selected RPT and range in the current...

Страница 99: ...not change This argument is only a coarse value and may initially need to be adjusted empirically for correct operation A higher v setting will speed up the generation with a greater chance of control...

Страница 100: ...of pressure change and ambient pressure for the active RPT always Hi RPT in PPCK and range is returned in the current pressure units This program message is useful when a rapid response of measured p...

Страница 101: ...xample classic Sent Reply RANGE 1 HI 3000 psia Errors ERR 6 Invalid n or XX argument ERR 22 System must be vented for the requested operation ERR 38 The selected range is not available See Also 3 1 2...

Страница 102: ...ast rates Command Query RATES FastRate SlowRate RATES Classic RANGE FastRate SlowRate RANGE Default Range dependent Arguments FastRate The rate set units s when the manual up or down and fast keys are...

Страница 103: ...eady Example classic v2 01 up Sent Query reply READYCK 1 READYCK 1 if PPCK condition has stayed Ready READYCK 0 if PPCK condition has NOT stayed Ready Example classic v2 00 Sent Query reply READYCK 1...

Страница 104: ...y reply RES 01 0 01 FS Example classic Sent Reply RES 01 0 01 FS Errors ERR 6 The argument is invalid See Also 3 2 9 RESET Purpose Reset the user s settings to factory defaults Command RESET Classic R...

Страница 105: ...sure is invalid See Also 3 2 3 3 2 10 PS TP RS Purpose Adjust pressure at a fixed rate Command RS RateReq Classic RS RateReq Arguments RateReq The rate for the PPCK to generate to Negative rates cause...

Страница 106: ...trol settings to use Command Query SETS type SETS Classic SETS type SETS Arguments Type SYS Set the generation settings to the factory defaults USER Allows user specified custom generation settings Re...

Страница 107: ...ied upper limit Only decreasing pressure excursions will be allowed OP The pressure has exceeded the factory maximum pressure limit Normal operation cannot continue Example enhanced Query sent Query r...

Страница 108: ...uery STAT Classic STAT Remarks The generation cycle status can be checked using this program message The reply is a numeric code which references a specific generation action Multiple codes are return...

Страница 109: ...t Query reply TIME 12 52PM 12 52pm Example classic Sent Reply TIME 12 52PM 12 52pm Errors ERR 7 Missing or improper program message argument s See Also 3 4 4 4 TOUT This is an obsolete PPC2 Command Pu...

Страница 110: ...ample classic Sent Reply UCOEF 0 0010000000 kPa See Also 7 2 1 3 2 2 UDU Purpose Read or set the user defined pressure units Command Query UDU label ucoef UDU Classic UDU label ucoef UDU label User un...

Страница 111: ...h measurement mode gauge and absolute New automated pressure control targets can not be greater that this value If the pressure does exceed the upper limit the pressure display will flash and the unit...

Страница 112: ...e followed by a g to specify a gauge measurement mode also There can be a space between the unit text and the a or the g If the unit specified is InWa an optional second argument ref can be set The re...

Страница 113: ...valve is closed or a 1 if the exhaust valve is open Example enhanced Cmd sent Query reply VENT 1 0 if not vented 1 if vented Example classic Sent Reply VENT 1 VENT 0 if not vented VENT 1 if vented Er...

Страница 114: ...asurement mode gauge or absolute in Pa Date The date when the last edit to the offset was made Remarks The pressure offset ZOFFSET for the specified RPT always Hi RPT in PPCK and RPT range low medium...

Страница 115: ...TERR1 HI 10 961201 10 00 Paa 961201 Errors ERR 6 One of the arguments are out of range See Also 3 4 1 5 2 6 4 5 STATUS REPORTING SYSTEM The PPCK status reporting system is used to track and report sys...

Страница 116: ...ster Status Byte Register STB or SRE n OPER 128 RQS MSS 64 Standard Event Status Register ESR or ESE n ESB 32 PON 128 URQ 64 CMD 32 EXE 16 DDE 8 QYE 4 RQC 2 OPC 1 MAV 16 OUTPUT QUEUE N A 8 ERROR 4 ERR...

Страница 117: ...e PPCK and is a part of the Status Byte Register when read using a serial poll This bit does not apply if the COM1 port is being used MSS Master Summary Status Bit 6 Indicates that an event or events...

Страница 118: ...the last time this bit was read or cleared URQ User Request Bit 6 Indicates that the PPCK was set to local operation manually from the front panel by the user pressing the ESC key Command Error Bit 5...

Страница 119: ...3 1 2 5 RDY Generation Ready Bit 0 Indicates that the PPCK has reached a target pressure and is Ready as defined by the control settings see Sections 3 1 2 4 3 1 2 5 and 3 2 3 4 6 IEEE STD 488 2 COMMO...

Страница 120: ...Status Enable register determines which bits in the standard Event Status Register are enabled and included in the Status Byte Register ESB bit and can assert the SRQ line The reply is in decimal nume...

Страница 121: ...OPT IEEE 488 0 ANALOG RST Purpose Resets the PPCK control settings to factory settings Command RST Remarks This Command sets the PPCK settings to factory settings This equivalent to a fro n t p a n e...

Страница 122: ...ecimal representation of the bit s to enable To enable the RDY bit the argument would be 1 Remarks The Ready Status Enable Register determines which bits in the Ready Status Register are enabled and i...

Страница 123: ...ce adjustment and calibration procedures certain repair functions and recommended overhaul procedures PPCK is a sophisticated pressure setting and measuring instrument with advanced on board features...

Страница 124: ...r localized non linearity and excursion dependent hysteresis Independent range calibration also makes it possible to calibrate only certain ranges if ranges are on different calibration intervals or n...

Страница 125: ...calibrated For the original factory calibration PA and PM are set to 0 and 1 and privileged factory coefficients are used for calibration adjustment 5 2 1 2 SETTING ZNATERR Setting ZNATERR is necessar...

Страница 126: ...le running the calibration and is automatically recorded and provided if desired As left data is also calculated and presented At any time with knowledge of pressures applied associated transducer rea...

Страница 127: ...calibrated in gauge mode should not be used to make accurate measurement in absolute mode Able to apply pressures at 20 increments in the range to be calibrated It is not necessary that the calibratio...

Страница 128: ...pressure control idle This allows its RPT to be calibrated as a measuring device Pressures are normally generated and adjusted by the pressure standard not by the PPCK q Allow PPCK to warm up with pow...

Страница 129: ...om the ZNATERR field goes to the next view edit screen 1 Edit field for value of PA if in edit mode 2 Current RPT measurement range 3 Edit field for value of PM if in edit mode If in edit mode the cal...

Страница 130: ...ng AutoZ see Section 3 4 1 3 Changing the value of ZNATERR between RPT calibrations may invalidate the autozero function for that range Run ZNATERR should not be used between calibrations 5 2 7 RPT CA...

Страница 131: ...int to allow full stabilization Record the pressure the value of the pressure applied by the reference and the value indicated by the PPCK at each point The data recorded is the as received data for t...

Страница 132: ...d PM In edit mode the values can be edited Pressing ENTER after the last screen activates the edited values To view the current atmospheric pressure measurement made by the barometer board press SPECI...

Страница 133: ...00 kPa 100 psi p Using a 1 2 in wrench slowly loosen the DH200 gland nut on the DRAIN port on the rear panel of PPCK Gas will escape from the port q Observe the exhaust from the DRAIN port If liquids...

Страница 134: ...assembly that includes six solenoid valves and interconnecting tubing see Figures 11 12 The function of the low pressure pneumatic module is to precisely control the drive air that actuates the high...

Страница 135: ...trol Unit TPCU 7 Drive Air Filter 17 Reference Pressure Transducer RPT 8 Drive Air Regulator factory adj 18 High Pressure Filter s 9 DRIVE OUT Port 1 8 in NPT F 19 High Pressure Lines 10 HP Exhaust Va...

Страница 136: ...M EEPROM NVRAM and flash memories RS232 communications IEEE 488 communications the front panel keypad and display control and a two channel frequency counter for reading the reference pressure transdu...

Страница 137: ...er up Blown fuse Replace fuse Measured pressure display has too much not enough resolution Resolution setting needs to be changed Use RES to change resolution setting 3 2 9 The pressure units availabl...

Страница 138: ...flashing no buzzer is sounding and manual pressure control keys are inactive PPCK has been overpressured pressure higher than UL Correct the overpressure condition and cycle power ON and OFF 3 2 4 3 2...

Страница 139: ...Thermal Pressure Control TPC has incorrectly calculated test volume Run Config routine 5 5 3 1 2 3 Poor pressure control characterized by control not locking on target pressure Control mode is set to...

Страница 140: ...pressure control characterized by excessively fast slew rate and overshooting Test volume too small Increase test volume Poor pressure control characterized by pauses at the start of a pressure settin...

Страница 141: ...nWa 3 2 2 Apparently inaccurate pressure measurement control Reference pressure transducer calibration coefficients have been altered Check and correct calibration coefficients if needed 5 2 Apparent...

Страница 142: ...PPCK Operation and Maintenance Manual 2001 DH Instruments Inc Page 134 N NO OT TE ES S...

Страница 143: ...will change state while the corresponding driver number on the keyboard is being pressed In toggle mode the driver state will toggle each time the corresponding key is pressed and released Each outpu...

Страница 144: ...l Drivers EXTERNAL DRIVERS PIN DESCRIPTION A D1 Driver 1 Open Collector C D2 Driver 2 Open Collector E D3 Driver 3 Open Collector G D4 Driver 4 Open Collector M D5 Driver 5 Open Collector J D6 Driver...

Страница 145: ...nits to corresponding values expressed in other units Table 21 Conversion Coefficients TO CONVERT FROM PA TO MULTIPLY BY Pa Pascal 1 0 mbar millibar 1 0 E 02 kPa kilo Pascal 1 0 E 03 bar bar 1 0 E 05...

Страница 146: ...hold limit stability limit Custom Control Automated pressure control in which the control parameters are not the default control parameters Deviation The deviation of the current pressure from the tar...

Страница 147: ...ressure range RPT in a dual RPT PPCK is referred to as the Lo RPT RPTs are designated by a leading A or G absolute or gauge followed by four numbers indicating the maximum range of the RPT in psi e g...

Страница 148: ...repair or replacement of defective products after their inspection and verification of such defects All products to be considered for repair or replacement are to be returned to DHI or its Authorized...

Страница 149: ...dwide Minerva I P M B V Handelsweg 13 Postbus 76 1270 AB Huizen NETHERLANDS Tel 31 35 52 54 887 Fax 31 35 52 64 560 minervaipm compuserve com European Union Nippon CalService Inc 2 9 1 Sengen Tsukuba...

Страница 150: ...PPCK Operation and Maintenance Manual 2001 DH Instruments Inc Page 142 N NO OT TE ES S...

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