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DH Instruments PPCK PLUS Operation And Maintenance Manual

High pressure controller/calibrator
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PPCK+™
High Pressure Controller/Calibrator
Operation and Maintenance Manual
©2001 DH Instruments, Inc.

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  • Page 1 PPCK+™ High Pressure Controller/Calibrator Operation and Maintenance Manual ©2001 DH Instruments, Inc.
  • Page 2 PPCK+™ Operation and Maintenance Manual High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices. ©...

  • Page 3: Table Of Contents

    PPCK+™ Operation and Maintenance Manual TABLE OF CONTENTS ................i TABLES ....................iv FIGURES ....................v ABOUT THIS MANUAL ................vi 1. INTRODUCTION ..................1 PRODUCT OVERVIEW ..........................1 SPECIFICATIONS .............................2 1.2.1 GENERAL SPECIFICATIONS ...........................2 1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS....................2 1.2.2.1 REFERENCE PRESSURE TRANSDUCER (RPT) SPECIFICATIONS..........3 1.2.2.2 ON-BOARD BAROMETER ........................4 1.2.3...
  • Page 4 PPCK+™ Operation and Maintenance Manual 3. OPERATION ..................17 GENERAL/MANUAL OPERATION ......................17 3.1.1 MAIN RUN SCREEN ............................17 3.1.2 GENERAL OPERATING PRINCIPLES ......................18 3.1.2.1 KEYPAD LAYOUT AND PROTOCOL....................18 3.1.2.2 MANUAL PRESSURE CONTROL KEYS ..................19 3.1.2.3 PRESSURE CONTROL OPERATING PRINCIPLES ..............20 3.1.2.4 AUTOMATED PRESSURE CONTROL MODES ................22 3.1.2.5 PRESSURE READY /NOT READY ....................25...
  • Page 5 PPCK+™ Operation and Maintenance Manual PROGRAMMING FORMATS........................71 4.3.1 CLASSIC PROGRAM MESSAGE FORMAT ....................71 4.3.2 ENHANCED PROGRAM MESSAGE FORMAT....................71 4.3.2.1 ENHANCED PROGRAM MESSAGE USING THE COMMAND TYPE..........72 4.3.2.2 ENHANCED PROGRAM MESSAGE USING THE QUERY TYPE ..........72 COMMANDS ............................73 4.4.1 PROGRAM MESSAGES..........................73 4.4.2 ERROR MESSAGES ............................75 4.4.3...
  • Page 6 PPCK+™ Operation and Maintenance Manual Table 1. Model Designations and Ranges ....................3 Table 2. Default Pressure Control Parameters ..................5 Table 3. PPCK+ Packing List ........................7 Table 4. Static and Dynamic Pressure Control Modes Summary............22 Table 5. PPCK+ Range Identification Summary ...................
  • Page 7 PPCK+™ Operation and Maintenance Manual Figure 1. Front Panel ..........................9 Figure 2. Rear Panel Assembly ......................10 Figure 3. Keypad Layout......................... 18 Figure 4. Manual Pressure Control Keys....................19 Figure 5. Pneumatic Schematic......................21 Figure 6. Static Pressure Control Operation................... 23 Figure 7.

  • Page 8: About This Manual

    PPCK+™ Operation and Maintenance Manual Manual Conventions This manual is intended to provide the user with the basic information necessary to operate a PPCK+ pressure controller/calibrator. It also includes a great deal of additional information provided to allow you to optimize its use and take full advantage of its many features and functions. Before using the manual, take a moment to familiarize yourself with the table of contents structure: Sections 1, 2 and 3 should be read by all first time PPCK+ users.

  • Page 9: Introduction

    PPCK+™ Operation and Maintenance Manual 1. I NTRODUCTION 1.1 PRODUCT OVERVIEW PPCK+ is a stand-alone, microprocessor driven, pressure controller/calibrator intended to precisely measure and control precise gas pressure as needed for the calibration and testing of pressure measuring instruments. PPCK+ offers very high performance combined with maximum versatility and ease of use.

  • Page 10: Specifications

    PPCK+™ Operation and Maintenance Manual 1.2 SPECIFICATIONS 1.2.1 GENERAL SPECIFICATIONS Power Requirements: 85 to 264 VAC, 47 to 440 Hz, 60 VA max. consumption Operating Temperature Range: 15 to 35 °C Storage Temperature Range: -20 to 70 °C Vibration: Meets MIL-T-28800D Weight: 15.4 kg (34 lb) Dimensions:...

  • Page 11: Reference Pressure Transducer (Rpt) Specifications

    PPCK+™ Operation and Maintenance Manual Table 1. Model Designations and Ranges US UNITS VERSION (psi) SI UNITS VERSION (MPa) DESIGNATION RANGE1 (LO) RANGE2 (MID) RANGE3 (HI) RANGE1 (LO) RANGE2 (MID) RANGE3 (HI) A10000 3 000 6 000 10 000 2 000 4 000 6 000 A6000...

  • Page 12: On-Board Barometer

    PPCK+™ Operation and Maintenance Manual 1.2.2.2 ON-BOARD BAROMETER The on-board barometer is NOT used as a source of absolute accuracy. It is ONLY used to measure changes in atmospheric pressure between zeroing opportunities to provide dynamic compensation of the RPTs atmospheric pressure offset when making gauge pressure measurements.

  • Page 13: Table 2. Default Pressure Control Parameters

    PPCK+™ Operation and Maintenance Manual Table 2. Default Pressure Control Parameters DYNAMIC CONTROL MODE STATIC CONTROL MODE HOLD LIMIT STABILITY LIMIT HOLD LIMIT STABILITY LIMIT ± 0.01 % FS of active ± 0.005 % FS/sec of ± 1% FS of active ±...
  • Page 14 PPCK+™ Operation and Maintenance Manual Page 6 ©2001 DH Instruments, Inc.

  • Page 15: Installation

    PPCK+™ Operation and Maintenance Manual 2. I NSTALLATION 2.1 UNPACKING AND INSPECTION 2.1.1 REMOVING FROM PACKAGING PPCK+ is delivered in a corrugated container with high density polyethylene inserts to hold it in place; or in the optional molded medium density polyethylene shipping case with a custom foam insert.

  • Page 16: Site Requirements

    PPCK+™ Operation and Maintenance Manual 2.2 SITE REQUIREMENTS The PPCK+ can be installed on any flat, stable surface at a convenient height. The front feet can be extended so that the unit can be inclined slightly for easier viewing. The PPCK+ can also be mounted in a standard 19 in.

  • Page 17: Front And Rear Panels

    PPCK+™ Operation and Maintenance Manual 2.3.2 FRONT 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. Display 3. Manual Pressure Control Keys Multi-Function Keypad 4.

  • Page 18: Rear Panel Assembly

    PPCK+™ Operation and Maintenance Manual 2.3.2.2 REAR PANEL ASSEMBLY The rear panel assembly provides pressure connections, communications interfaces, the power ON/OFF module and product labeling. Pressure fittings are internally secured to prevent loosening when making and breaking connections. Label, Product Pass Through, ATM REF (10-32 UNF) COM2 Connector DRAIN Port (DH200 F)

  • Page 19: Connecting The High Pressure Supply (Supply Port)

    PPCK+™ Operation and Maintenance Manual 2.3.4 CONNECTING THE HIGH PRESSURE SUPPLY (SUPPLY PORT) The SUPPLY port is for connection of the high pressure gas that PPCK+ controls. Using a pressure connecting hose or rigid tube of appropriate pressure rating, connect the pressure supply to the SUPPLY port on the rear panel of PPCK+.

  • Page 20: Connecting The Drive Pressure Supply (Drive In Port)

    PPCK+™ Operation and Maintenance Manual Minimizing the length and complexity of the test connection tubing enhances control performance and reduces pressure setting time. For optimum operation, the total volume of the device or system under test including connecting tubing should be less than 500 cc (30 in ) up to 200 MPa (3 000 psi) and less than 200 cc (12 in ) over 200 MPa (3 000 psi).

  • Page 21: Vent Port

    PPCK+™ Operation and Maintenance Manual 2.3.8 VENT PORT The PPCK+ VENT port is the test exhaust port as well as the vent to atmosphere point used to set zero gauge pressure. Though a pressure hose can be connected to the VENT port to direct the vented gas flow, a completely unobstructed connection to atmosphere must be maintained for PPCK+ reference pressure measurements to operate normally.

  • Page 22: Power-Up And Verification

    PPCK+™ Operation and Maintenance Manual 2.4 POWER-UP AND VERIFICATION 2.4.1 SWITCH POWER ON Actuate the power switch on the PPCK+ rear panel. Observe the front panel display as PPCK+ initializes, error checks and goes to the main run screen (see Section 3.1.1). PPCK+ operating condition at power-up is all valves closed.

  • Page 23: Leak Check

    PPCK+™ Operation and Maintenance Manual Observe that, within 60 seconds, the [VENT] LED flashes and zero is indicated. It is normal for PPCK+ to indicate a value other than zero for up to 60 seconds when first entering gauge mode. Using the [RANGE] function key to change ranges, observe that zero is indicated for each range within 60 seconds.
  • Page 24 PPCK+™ Operation and Maintenance Manual Page 16 ©2001 DH Instruments, Inc.

  • Page 25: Operation

    PPCK+™ Operation and Maintenance Manual 3. O PERATION 3.1 GENERAL/MANUAL OPERATION PPCK+ is designed to balance simple, intuitive operation and the availability of a wide variety of functions with a high level of operator discretion. The local operator interface is through a 2 x 20 display, 4 x 4 keypad and four manual pressure control keys on the front panel.

  • Page 26: General Operating Principles

    PPCK+™ Operation and Maintenance Manual 11. Indicates whether the number following is target pressure <T>, rate of change of pressure <R> or current deviation from target value <D>) (see Section 3.2.3). Target pressure <T> is indicated when: • Dynamic control is active and pressure is Not Ready. •...

  • Page 27: Manual Pressure Control Keys

    PPCK+™ Operation and Maintenance Manual Pressing [ENTER] within a menu or function generally causes execution or forward movement in the menu tree. Pressing [ENTER] from the main run screen allows an automated pressure control command to be given. Pressing [ESCAPE] moves back in the menu tree and/or causes execution to cease or suspend.

  • Page 28: Pressure Control Operating Principles

    PPCK+™ Operation and Maintenance Manual 3.1.2.3 PRESSURE CONTROL OPERATING PRINCIPLES Numerical references in this section refer to Figure 5. PPCK+ is designed to precisely measures and control gas pressures into a volume connected to its TEST port (14). Pressure is measured by a Reference Pressure Transducer (RPT)(17).

  • Page 29: Figure 5. Pneumatic Schematic

    PPCK+™ Operation and Maintenance Manual SUPPLY Port (DH200 F) High Pressure Exhaust Valve HP Inlet Valve Dome Exhaust Valve HP Exhaust Valve Dome Exhaust Valve High Pressure Inlet Valve VENT Port (1/8 in. NPT F) HP Inlet Valve Dome Supply Valves TEST Port (DH200 F) Drive Air Lines DRAIN Port (DH200 F)

  • Page 30: Automated Pressure Control Modes

    PPCK+™ Operation and Maintenance Manual 3.1.2.4 AUTOMATED PRESSURE CONTROL MODES PPCK+ automated pressure control provides automated adjustment and control of pressure to a user designated target value. This feature allows pressure values to be set precisely by simple numerical entry. Pressing [SET P] from the main run screen allows a pressure control target value to be entered and executed.

  • Page 31: Figure 6. Static Pressure Control Operation

    PPCK+™ Operation and Maintenance Manual Static Control Static control mode is designed to bring the pressure near the target value and then set a very slow pressure ramp during which valid comparative measurements between the PPCK+ and the DUT can be made. Static control is not intended to set and maintain pressure at a specific value, but rather to establish a very low rate of change of pressure near a nominal target value.

  • Page 32: Figure 7. Dynamic Pressure Control Operation

    PPCK+™ Operation and Maintenance Manual Dynamic Control Dynamic control mode is designed to set the pressure to the target value and control continuously to keep pressure within the hold limit, as close to the target value as possible. The advantage of this dynamic control mode is that the final pressure achieved is the same as the target value.

  • Page 33: Pressure Ready /Not Ready

    PPCK+™ Operation and Maintenance Manual 3.1.2.5 PRESSURE READY /NOT READY PPCK+ provides a Ready/Not Ready indication. This indication is intended to provide the user with a clear and objective criterion for determining when a valid pressure measurement can be made. On the main run screen, the far left character of the top display lines indicates Ready/Not Ready.

  • Page 34: Figure 8. Ready/Not Ready In Static Control Mode

    PPCK+™ Operation and Maintenance Manual Ready/Not Ready In Static Control Mode When static pressure control mode is active a Ready condition occurs whenever: • The current measured pressure is inside the hold limit. • The rate of change of pressure is less than the current stability limit. Figure 8.

  • Page 35: Multiple Pressure Ranges

    PPCK+™ Operation and Maintenance Manual Ready/Not Ready When Pressure Control Is Not Active When automated pressure control is NOT active, Ready is indicated whenever the rate of change of pressure is less than the current stability limit. 3.1.2.6 MULTIPLE PRESSURE RANGES PPCK+ has one reference pressure transducer (RPT) which has three ranges.

  • Page 36: Direct Function Keys Summary

    PPCK+™ Operation and Maintenance Manual 3.1.2.7 DIRECT FUNCTION KEYS SUMMARY Local operation of PPCK+ is through the 4 x 4 pressure sensitive keypad. To minimize the use of multi-layered menu structure, the 4 x 4 keypad numerical keys also provide direct access to the most commonly used functions. The function accessed is labeled on the bottom half of the key.

  • Page 37: Table 6. Summary Of Ppck+ Direct Function Key Operation

    PPCK+™ Operation and Maintenance Manual Table 6. Summary of PPCK+ Direct Function Key Operation Direct Function Keys are active from the MAIN run screen See corresponding manual sections for full detail MENU OF COMMONLY USED SETUP FEATURES INCLUDING Menu of less frequently used internal functions and settings. SPECIAL Adjust height of fluid head correction.

  • Page 38: Range Specific Functions And Settings

    PPCK+™ Operation and Maintenance Manual When the [RANGE] function key is first pressed, the active reference pressure transducer (RPT) and range are displayed. For example: Identifies RPT currently in use (<Hi>). Identifies current range (<1>, <2> or <3>) of the RPT. Range designator.

  • Page 39: Unit]

    PPCK+™ Operation and Maintenance Manual 3.2.2 [UNIT] PURPOSE To specify the pressure unit of measure and measurement mode in which PPCK+ displays pressure values. See also Section 3.4.3. PRINCIPLE PPCK+ allows the pressure measurement unit and mode to be changed. Internally, PPCK+ always operates in Pascal (Pa), the SI unit of pressure.

  • Page 40: Control]

    PPCK+™ Operation and Maintenance Manual Select the desired reference temperature for water density using the [←] or [→] key to move the cursor. Pressing [ENTER] returns to the main run screen with inWa based on water density at the selected reference temperature as the pressure unit. The current inWa reference temperature can be viewed by observing the position of the cursor in the reference temperature screen.
  • Page 41 PPCK+™ Operation and Maintenance Manual PRINCIPLE The CONTROL function allows the active control mode for the current range to be set to either static control or dynamic control (see Section 3.1.2.4). The control mode is specific to the active range and is maintained with the range when ranges are changed. When the control mode is selected using the CONTROL function, CONTROL parameters are set to system default parameters.

  • Page 42: System Default Control Parameters

    PPCK+™ Operation and Maintenance Manual 3.2.3.1 SYSTEM DEFAULT CONTROL PARAMETERS Default control parameters for the control mode are automatically set whenever the control mode is selected. Table 7. Default Pressure Control Parameters DYNAMIC CONTROL MODE STATIC CONTROL MODE HOLD LIMIT STABILITY LIMIT HOLD LIMIT STABILITY LIMIT...

  • Page 43: Overpressure Function

    PPCK+™ Operation and Maintenance Manual OPERATION When the [UPPER LIMIT] function key is pressed from the main run screen the display is: Upper Limit: Entry field to enter desired upper limit value. 6300 psi a Enter the desired upper limit value and PPCK+ returns to the main run screen with a new upper limit value active.

  • Page 44: Custom Control]

    PPCK+™ Operation and Maintenance Manual 3.2.6 [CUSTOM CONTROL] PURPOSE To customize the control parameters of the current pressure control mode for the current range. See Sections 3.1.2.4, 3.2.3 for information on setting pressures automatically. PRINCIPLE Automated pressure control and the associated pressure Ready/Not Ready condition are characterized by hold limit and stability limit parameters which determine how PPCK+ controls and under what conditions a Ready indication will occur (see Sections 3.1.2.4 and 3.1.2.5).

  • Page 45: Turning-Off Custom Control Parameters

    PPCK+™ Operation and Maintenance Manual OPERATION To set custom control parameters, press the [CUSTOM CONTROL] key from the main run screen. The display is: Current reference transducer (<H> for high) and range (<1>, <2> or <3>). Hold limit: Current control mode setting for this range (<S> for 0.30 psi static, <D>...

  • Page 46: Head]

    PPCK+™ Operation and Maintenance Manual 3.2.7 [HEAD] PURPOSE To cause a pressure value representing a difference in height to be added to the pressure measured by the PPCK+ reference pressure transducer. PRINCIPLE PPCK+'s reference pressure transducers measure gauge or absolute pressure at the height of the rear panel TEST port.

  • Page 47: Leak Check]

    PPCK+™ Operation and Maintenance Manual Entering a value of zero turns the HEAD function OFF. Entering a value other than zero turns the HEAD function ON using the height entered. Pressing [ESCAPE] returns to the main run screen with no change to the current head setting. The HEAD function is NOT range specific.
  • Page 48 PPCK+™ Operation and Maintenance Manual OPERATION Use automated (see Section 3.2.10) or manual (see Section 3.1.2.2) pressure control to set the pressure at which the leak check is to be conducted. Once the pressure has been set, abort pressure control and wait three minutes for pressure stabilization. To access the LEAK function press [SETUP], <5Leak>.

  • Page 49: Res] (Resolution)

    PPCK+™ Operation and Maintenance Manual Once the leak check countdown has completed, the results screen is displayed: Net change in pressure over the leak check Δ P -0.02 time period. Rate -0.026/sec Indicator of range in which leak check was run. Average rate of change of pressure over the leak check time period.

  • Page 50: Set P] (Setting Pressure Automatically)

    PPCK+™ Operation and Maintenance Manual 3.2.10 [SET P] (SETTING PRESSURE AUTOMATICALLY) PURPOSE To set a pressure automatically. See Sections 3.2.3, 3.1.2.4 for information on setting the control mode (Static or Dynamic). PRINCIPLE PPCK+ automatically sets and holds pressure to a user designated target value. This feature allows pressure values to be set easily and precisely by simple numerical entry from the front panel or by remote command (see Sections 3.1.2.3, 3.1.2.4).
  • Page 51 PPCK+™ Operation and Maintenance Manual Press [ENTER] to start pressure control to the target pressure, in the current control mode (see Section 3.2.3) and return to the main run screen. The main run screen is: Ready/Not Ready indication, current pressure, units, measurement mode, range (regular first line of main run screen).

  • Page 52: Automated Pressure Commands For Zero Pressure

    PPCK+™ Operation and Maintenance Manual In dynamic control mode, whenever the pressure is Ready (inside the hold limit), the display of measured pressure is equal to the target pressure. This is because in dynamic control mode, when the pressure is Ready, it is assumed that the measured pressure equals the target pressure.

  • Page 53: And [→] (Jog Pressure Set Point)

    PPCK+™ Operation and Maintenance Manual 3.2.11 [←] AND [→] (JOG PRESSURE SET POINT) PURPOSE To jog the pressure target value in small increments around the set point. See Section 3.2.10 for information on setting pressure automatically. PRINCIPLE PPCK+ sets and adjusts pressure automatically to a user designated target value. In some cases, it can be useful to slightly adjust the target value, for example to set the DUT to read a specific value as commonly done when verifying or calibrating an analog gauge.

  • Page 54: Setup Menu Key

    PPCK+™ Operation and Maintenance Manual 3.3 SETUP MENU KEY PURPOSE The [SETUP] menu key accesses a menu of functions and features commonly used in setting up PPCK+ for use. OPERATION Press the [SETUP] key from the main run screen to access 1Sequence 2Drivers the SETUP menu.

  • Page 55: Special Menu Key

    PPCK+™ Operation and Maintenance Manual 3.4 SPECIAL MENU KEY The [SPECIAL] menu key accesses a menu of functions that are less commonly used or not normally used in regular operation. Press the [SPECIAL] menu key to access the SPECIAL menu. The display is: 1AutoZ 2Head 3PresU 4Internal...
  • Page 56 PPCK+™ Operation and Maintenance Manual The autozeroing function uses four parameters: 1. ZSTD: The value of the autozero reference pressure as indicated by the reference autozero device. In 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;...
  • Page 57 PPCK+™ Operation and Maintenance Manual Gauge Mode, Dynamic Compensation For Atmospheric Pressure PPCK+ allows gauge pressure measurements with an absolute RPT by calculation, subtracting the value of atmosphere (tare) from the RPT's absolute measurement to arrive at a gauge value. The appropriate tare value changes with the natural evolution of atmospheric pressure at a given location.

  • Page 58: View Autoz

    PPCK+™ Operation and Maintenance Manual OPERATION The AutoZ function and values are range AND mode (gauge or absolute) specific. To access the PPCK+ AutoZ function press 1off 2view [SPECIAL] and select <1AutoZ>. The display is: 3edit 4run Selecting <1off> (or <1on>) is for changing the AutoZ status for the current range and measurement mode from ON to OFF or vice versa.

  • Page 59: Edit Autoz

    PPCK+™ Operation and Maintenance Manual 3.4.1.2 EDIT AUTOZ The edit AutoZ function should be used with great caution as entering inappropriate values and turning ON AutoZ may result in incorrect autozeroing and out of tolerance measurements. In normal operation, the value of ZOFFSET should be changed using the run AutoZ function (seen Section 3.4.1.3).
  • Page 60 PPCK+™ Operation and Maintenance Manual If the measurement mode of the current range is absolute the display is: Current range. AutoZ H3 abs by: Current measurement mode. 1Entry 2COM2 Selection of source of ZSTD for ZOFFSET determination. Selecting <1Entry> allows the value of ZSTD to be entered from the front panel keypad.
  • Page 61 PPCK+™ Operation and Maintenance Manual Run Autoz By Entry (Absolute Mode Only) AutoZ by entry allows the value of ZSTD (see Section 3.4.1, PRINCIPLE, How AutoZ Works) to be entered manually. This provides a simple way of autozeroing relative to an independent reference device such as a house barometer that does not interface directly with PPCK+.

  • Page 62: Head

    PPCK+™ Operation and Maintenance Manual When Ready, press [ENTER]. The next Old ZOFFSET: 0.0 Pa display is: New ZOFFSET: 756.8 Pa The new ZOFFSET is the ZOFFSET calculated from this execution of run AutoZ. Press [ENTER] to activate the new ZOFFSET and return to the main run screen. Press [ESCAPE] to maintain the old ZOFFSET and return to the main run screen.

  • Page 63: Presu

    PPCK+™ Operation and Maintenance Manual 3.4.3 PresU PURPOSE To customize the selection of pressure units that are available for selection from the [UNIT] function key. PRINCIPLE The [UNIT] function key makes available a choice of six default pressure units (US or SI units depending on whether the PPCK+ has been factory set as US or SI) (see Section 3.2.2).

  • Page 64: Internal

    PPCK+™ Operation and Maintenance Manual If <3user> is selected, the user unit must be defined. The display is: Entry field. Define user unit: 1.0000000 Units/PA Enter the number of user units per Pascal (Pa) in the entry field. Pressing [ENTER] defines the user unit and returns to the <Set up unit #>...

  • Page 65: Config

    PPCK+™ Operation and Maintenance Manual Select the desired internal function. Select <2Cal> to view and edit calibration coefficients for the PPCK+ RPT ranges and on-board barometer (see Section 3.4.4.2). Select <3Remote> to view and edit RS232 (COM) port and IEEE-488 interface settings (see Section 3.4.4.3).

  • Page 66: Cal

    PPCK+™ Operation and Maintenance Manual OPERATION PPCK+ uses self diagnostics to determine when to run the TPC configuration routine in dynamic control mode. Therefore, it is not normally necessary to run the configuration routine separately. Running the Config routine may cause the set pressure to increase or decrease by up to 1.4 MPa (200 psi).

  • Page 67: Remote

    PPCK+™ Operation and Maintenance Manual 3.4.4.3 REMOTE PURPOSE To configure the PPCK+ communication ports including COM1, COM2 and the IEEE-488 interface. PRINCIPLE The PPCK+ has two RS232 communications ports referred to as COM1 and COM2 and an IEEE-488 (GPIB) interface. Communication with a host computer is accomplished using either COM1 or the IEEE-488 interface.

  • Page 68: Time

    PPCK+™ Operation and Maintenance Manual IEEE-488 The IEEE-488 port’s primary address can be set from 1 to 31 in this screen. The factory default value is 10. Secondary addressing is not used or supported. This address must not conflict with the address of any other devices on the same IEEE-488 bus.

  • Page 69: Reset

    PPCK+™ Operation and Maintenance Manual 3.4.4.5 RESET PURPOSE To reset various PPCK+ settings to default or factory values. PPCK+ stores its user definable settings in non-volatile memory. The reset menu allows the user to selectively or completely reset these settings to factory defaults.
  • Page 70 PPCK+™ Operation and Maintenance Manual • COM ports and IEEE-488 settings to default (see Section 3.4.4.3). • Autozero enabled (see Section 3.4.1). • Screen saver to 10 minutes (see Section 3.4.4.8). Reset - Units PURPOSE Sets the six pressure units available under the UNIT function to the SI or US default selections depending on whether the PPCK+ has been factory set for SI or US.

  • Page 71: Level

    PPCK+™ Operation and Maintenance Manual Reset - All PURPOSE The reset - all function will clear and delete large amounts of user defined information including critical calibration data. Combines all resets in one global reset command that clears the entire user section of non-volatile memory.
  • Page 72 PPCK+™ Operation and Maintenance Manual Security Levels The security levels are structured to support typical operating environments as follows: None This level is intended for use only by the system manager and/or calibration facility. It allows access and editing in all areas including critical metrological information.

  • Page 73: Table 9. Security Levels

    PPCK+™ Operation and Maintenance Manual Table 9. Security Levels FUNCTION MEDIUM HIGH • [RANGE] key • [UNIT] key • [CONTROL] key • [UPPER LIMIT] key • • [CUSTOM CONTROL] key • [HEAD] key • • [LEAK CHECK] key • • [RES] key •...

  • Page 74: Atm

    PPCK+™ Operation and Maintenance Manual The second selection <edit password> 1change user level displays the user password and allows it to 2edit password be edited. Passwords can be up to six numbers in length and cannot start with a zero. Once a password has been entered, the user level cannot be changed without reentering the password.

  • Page 75: Scrsav

    PPCK+™ Operation and Maintenance Manual OPERATION To view the current reading of the on-board barometer press [SPECIAL] and select <4Internal>, <7Atm>. The display is in the pressure units of the current PPCK+ range. 3.4.4.8 SCRSAV PURPOSE To adjust the PPCK+ screen saver function. PRINCIPLE PPCK+ has a screen saver function which causes the display to dim after a front panel key is not pressed for a certain amount of time.
  • Page 76 PPCK+™ Operation and Maintenance Manual Page 68 ©2001 DH Instruments, Inc.

  • Page 77: Remote Operation

    PPCK+™ Operation and Maintenance Manual 4. R EMOTE PERATION 4.1 OVERVIEW Most of the PPCK+ front panel functions can also be executed by commands from a remote computer. The host computer can communicate to the PPCK+ using the PPCK+ COM1 RS232 port or the IEEE-488 port.

  • Page 78: Ieee-488

    PPCK+™ Operation and Maintenance Manual Table 10. Pin Designations and Connections PPCK+ COM1 DB-9F PIN DESIGNATIONS PIN # FUNCTION DESCRIPTION This pin transmits serial data from the PPCK+ to the host. This pin accepts serial data from the host computer. This pin is the common return for the TxD and RxD signals.

  • Page 79: Programming Formats

    PPCK+™ Operation and Maintenance Manual 4.3 PROGRAMMING FORMATS The PPCK+ program message set is downward compatible with the previous PPCK program message set. It is identical to the PPC2+ program message set with the exception of a few commands that are not included for PPCK+ because they support PPC2+ functions that PPCK+ does not include.

  • Page 80: Enhanced Program Message Using The Command Type

    PPCK+™ Operation and Maintenance Manual 4.3.2.1 ENHANCED PROGRAM MESSAGE USING THE COMMAND TYPE The COMMAND type of program message executes a process and can additionally send data to the PPCK+ in the form of comma delimited arguments. This data is usually a setting of some sort that is stored in the PPCK+.

  • Page 81: Commands

    PPCK+™ Operation and Maintenance Manual 4.4 COMMANDS 4.4.1 PROGRAM MESSAGES Shown are the basic program messages for the classic and the enhanced formats. There are also additional IEEE Std. 488.2 common commands (they start with an ‘*’) that are common in all IEEE-488.2 compatible devices. These commands and the enhanced format status reporting model are covered in Sections 4.5 and 4.6.
  • Page 82 PPCK+™ Operation and Maintenance Manual Table 12. Program Message List (Continued) Read the next PPCK+ RPT pressure, rate, and ATM. Set a new target pressure and start automated pressure control. Set a new target pressure and use only the fast speed to reach the target. Obsolete PPC2 Command.

  • Page 83: Error Messages

    PPCK+™ Operation and Maintenance Manual 4.4.2 ERROR MESSAGES The PPCK+ always replies to a program message while using the classic format. If the program message is incorrect or contains invalid data, an error number will be returned in the form <ERR#n> where n is an integer number that represents a specific error. This allows for easy error trapping by the host computer.

  • Page 84: Program Message Description Overview

    PPCK+™ Operation and Maintenance Manual 4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW Each program message description is separated into the following sections: Purpose A brief description of the programs message’s function. Command This is the Enhanced program message syntax to send data to the PPCK+ or to execute a PPCK+ function.

  • Page 85: Program Message Descriptions

    PPCK+™ Operation and Maintenance Manual 4.4.4 PROGRAM MESSAGE DESCRIPTIONS Purpose To allow the host PC to communicate with a device connected to the PPCK+ COM2 port. This program message is obsolete. You should instead use the “PASSTHRU” program message. This command is not available when using the enhanced command format.
  • Page 86 PPCK+™ Operation and Maintenance Manual Purpose Reads the next measured internal ambient pressure. Query “ATM?” Classic “ATM” Remarks The atmospheric pressure as measured by the PPCK+ on-board barometer will be returned in the current pressure units (always absolute). This measurement is followed by the units text.
  • Page 87 PPCK+™ Operation and Maintenance Manual CALAMB Purpose Read or set the user ambient pressure RPT calibration. Command “CALAMB adder, mult” Query “CALAMB?” Classic “CALAMB= adder, mult” “CALAMB” Arguments Adder: The pressure adder. Always in Pa’ mult: The pressure multiplier. Defaults “CALAMB=0.00, 1.0000000”...
  • Page 88 PPCK+™ Operation and Maintenance Manual COM1 Purpose Read or set the RS232 settings for the COM1 port. Command “COM1 baud, parity, data, stop” Query “COM1?” Classic “COM1=baud, parity, data, stop” “COM1” Arguments baud: The baud rate. This may be ‘300’, ‘600’,’1200’,’2400’,’4800’, ‘9600’ or ‘19200’.
  • Page 89 PPCK+™ Operation and Maintenance Manual CONFIG Purpose Run the configuration routine to optimize the PPCK+ TPC system for changes in the test volume. Command “CONFIG” Classic “CONFIG” Remarks Thee PPCK+ TPC configuration typically takes from 30 to 150 seconds. During this period, no other PPCK+ operations or remote commands should take place.
  • Page 90 PPCK+™ Operation and Maintenance Manual Purpose Decrease the pressure at the fast rate. Command “DF n” Classic “DF=n” Arguments ‘0’ Stops the pressure decrease. ‘1’ Starts the pressure decrease. Remarks The PPCK+ will set and maintain the fast decrease rate until “DF=0” or “ABORT” is sent.
  • Page 91 PPCK+™ Operation and Maintenance Manual Purpose Decrease the pressure at the slow rate. Command “DS n” Classic “DS=n” Arguments ‘0’ Stops the decrease. ‘1’ Starts the decrease. Remarks PPCK+ sets and maintains the slow rate of pressure decrease until “DS=0” or “ABORT’...
  • Page 92 PPCK+™ Operation and Maintenance Manual HEAD Purpose Read or set the head settings. Command “HEAD h,u,g” Query “HEAD?” Classic “HEAD=h,u,g” “HEAD” Defaults “HEAD 0,cm,N2” Arguments The height of the test in relation to the PPCK+. This will be positive if the test is above the PPCK+, or negative if below the PPCK+.
  • Page 93 PPCK+™ Operation and Maintenance Manual Purpose Read or set the hold limit for automated pressure control in percent of range full scale. Command “HS% n” Query “HS%?” Classic “HS%=n “HS%” Arguments The hold limit in % FS of the current active range. Remarks The hold limit can be read and set as a pressure or as a percent of the range.
  • Page 94 PPCK+™ Operation and Maintenance Manual Purpose Increase the pressure at the slow increase rate. Command “IS n” Classic “IS=n” Arguments ‘0’ Stops the pressure increase. ‘1’ Starts the pressure increase. Remarks PPCK+ will increase pressure at the slow increase rate until “IS=0” or “ABORT” is sent or the upper limit is reached.
  • Page 95 PPCK+™ Operation and Maintenance Manual MODE Purpose Read or set the control mode. Command “MODE n” Query “MODE?” Classic “MODE=n” “MODE” Arguments ’0’ for static pressure control. ’1’ for dynamic pressure control. Remarks The method which the PPCK+ controls pressure is selected with the MODE program message.
  • Page 96 PPCK+™ Operation and Maintenance Manual PASSTHRU Purpose To allow the host PC to communicate with a device connected to the PPCK+ COM2 port. Command “PASSTHRU n Query “PASSTHRU?” Classic “PASSTHRU= n” “PASSTHRU” Arguments The string to send out of the COM2 port. It must be less than 40 characters long.
  • Page 97 PPCK+™ Operation and Maintenance Manual PCALN:HI Purpose Read or set the user RPT calibration information. The PPCK+ RPT is always the Hi RPT. Command “PCALn:HI adder, mult, CalDate” Query “PCALn:HI?” Classic “PCALn:HI =adder, mult, CalDate” “PCALn:HI” Defaults “PCALn:HI = 0.0, 1.0, 800101” Arguments The RPT range.
  • Page 98 PPCK+™ Operation and Maintenance Manual Purpose Read the next available pressure, rate and ATM pressure. Query “PRR?” Classic “PRR” Remarks The next available Ready condition, RPT pressure, rate of pressure change, and ambient pressure is replied in the current pressure units. Each data field is separated by a comma, and is returned in the following order: Ready/Not Ready, pressure UNITS, rate UNITS/s, atm UNITS.
  • Page 99 PPCK+™ Operation and Maintenance Manual Purpose Set a new target pressure and start a new pressure generation cycle. Allows the test volume to be specified. Command “PS n (,v)” Classic “PS=n (,v)” Arguments The target pressure in the current pressure units. The device system under test volume in cc (optional).
  • Page 100 PPCK+™ Operation and Maintenance Manual Purpose Set a new target pressure and use just the slow speed to generate the pressure. Command “PSS n” Classic “PSS=n” Arguments The target pressure in the current pressure units. Remarks The PPCK+ will set the given target pressure using just the slow speed, and will stop generating when the pressure has reached or passed the given target.
  • Page 101 PPCK+™ Operation and Maintenance Manual RANGE Purpose Read or change the active RPT range. Command “RANGE n:XX” Query “RANGE?” Classic “RANGE=n:XX” “RANGE ” Default “RANGE 3,HI” Arguments 1’ for the low range of the selected RPT. ‘2’ for the mid range of the selected RPT. ‘3’...
  • Page 102 PPCK+™ Operation and Maintenance Manual RATE Purpose Read the next available pressure rate of change. Query “RATE?” Classic “RATE” Remarks The next available pressure rate of change in the current pressure units per second is returned. After receiving this program message, the PPCK+ will reply back with the data once a new pressure measurement cycle is complete.
  • Page 103 PPCK+™ Operation and Maintenance Manual READYCK Purpose Read or set the ready check flag. Command “READYCK 1” Query “READYCK?” Classic “READYCK=1” “READYCK” Remarks The internal ready check flag is cleared whenever the PPCK+ reaches a Not Ready (NR) condition. The "READYCK" query will return the status of this flag. This flag is set by sending the "READYCK 1"...
  • Page 104 PPCK+™ Operation and Maintenance Manual Purpose To read or set the pressure display resolution for the current RPT and range. Command “RES n” “RES” Query Classic “RES=n” “RES” Default “RES 0.001” Arguments The pressure display resolution in % FS of the current RPT range (0.0001 to 1 % FS).
  • Page 105 PPCK+™ Operation and Maintenance Manual RETURN Purpose Start a new generation using the current target pressure. Command “RETURN” Classic “RETURN” Remarks The “RETURN” program message will start a new pressure generation using the current settings and target pressure. Generation will continue until a new target pressure is set, the PPCK+ goes into LOCAL mode, or an “ABORT”...
  • Page 106 PPCK+™ Operation and Maintenance Manual SCRSAV Purpose Read or set the front panel screen saver period. Command “SCRSAV n” Query “SCRSAV?” Classic “SCRSAV=n” “SCRSAV” Arguments The inactivity period (minutes). Default “SCRSAV 10” Remarks The PPCK+ front panel will dim after a period of keyboard and remote inactivity. Setting this value to ‘0’...
  • Page 107 PPCK+™ Operation and Maintenance Manual Purpose Read the next available Ready//Not Ready status. Query “SR?” Classic “SR” Remarks The current Ready status can be read using this program message. "NR " The pressure is Not Ready within the limits defined by the control mode and current control parameters.
  • Page 108 PPCK+™ Operation and Maintenance Manual Purpose Read or set the current stability limit. Command “SS n” Query “SS?” Classic “SS=n” “SS” Arguments The stability limit in the current pressure units. Remarks The stability limit can be read and set as a pressure. If this program message is used to set the stability limit, the PPCK+ will then use CUSTOM control settings.
  • Page 109 PPCK+™ Operation and Maintenance Manual TIME Purpose Read or set the PPCK+ time. Command “TIME hh:mmXX” Query “TIME?” Classic “TIME=hh:mmXX” “TIME” Arguments hh:mm The time in a 12 hour format using a colon delimiter. ”am” or “pm”. Remarks The PPCK+ has an internal real time clock. It is used for date stamping calibrations and log data.
  • Page 110 PPCK+™ Operation and Maintenance Manual UCOEF Purpose To convert 1 Pascal to the current pressure units. Query “UCOEF?” Classic “UCOEF” Remarks The PPCK+ handles all pressure values internally in Pascal. The coef replied is equivalent of 1 Pa. This program message allows the user to convert pressures. Example Query sent: “UCOEF?”...
  • Page 111 PPCK+™ Operation and Maintenance Manual Purpose Read or set an upper limit for the current RPT and range. Command “UL n” Query “UL” Classic “UL=n” “UL” Arguments The upper limit pressure in the current pressure units. This value is always in absolute units if the RPT is absolute, or gauge units if the RPT is gauge.
  • Page 112 PPCK+™ Operation and Maintenance Manual UNIT Purpose Read or set the pressure display unit and measurement mode. Command “UNIT unit (, ref”)” “UNIT unitg (, ref”)” “UNIT unita (, ref”)” Query “UNIT?” Classic “UNIT=unit (, ref”)” “UNIT=unitg (, ref”)” “UNIT=unita (, ref”)” “UNIT”...
  • Page 113 PPCK+™ Operation and Maintenance Manual VENT Purpose Read, execute or abort a vent process. Command “VENT n” Query “VENT?” Classic “VENT=n” “VENT” ’1’ to start a vent process. Arguments ’0’ to abort a vent process and close the exhaust valve. Remarks The PPCK+ vents by generating close to atmosphere, and then opening the exhaust valve.
  • Page 114 PPCK+™ Operation and Maintenance Manual ZOFFSETn:HI Purpose Read or set the autozero pressure offset (ZOFFSET) for the current RPT range and measurement mode. PPCK+ has only a Hi RPT. Command “ZOFFSETn:HI offset, Date” Query “ZOFFSETn:HI?” Classic “ZOFFSETn:HI =offset, Date” “ZOFFSETn:HI” Defaults “ZOFFSETn:HI = 0.0, 800101”...

  • Page 115: Status Reporting System

    PPCK+™ Operation and Maintenance Manual ZNATERRn:HI Purpose Read or set the autozero natural error (ZNATERR) for the selected RPT range and measurement mode. PPCK+ has only a Hi RPT. Command “ZNATERRn:HI NatErr, Date” Query “ZNATERRn:HI?” Classic “ZNATERRn:HI =NatErr, Date” “ZNATERRn:HI” Defaults “ZNATERRn:HI = 0.0, 800101”...

  • Page 116: Status Byte Register

    PPCK+™ Operation and Maintenance Manual 4.5.2 STATUS BYTE REGISTER The PPCK+ contains an 8 bit Status Byte Register that reflects the general status of the PPCK+. Table 14. 8 Bit Status Byte Register OPER RQS/MSS ERROR (128) (64) (32) (16) This register is affected by the PPCK+ reply output queue, the Error Queue, the Standard Event Status register and the Ready Event Status register.
  • Page 117 PPCK+™ Operation and Maintenance Manual 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 assert the SRQ line. This enable register has a matching set of bits that each will enable the designated bit to cause a SRQ, except for the RQS/MSS bit(s) which cannot cause a SRQ.

  • Page 118: Standard Event Register

    PPCK+™ Operation and Maintenance Manual 4.5.3 STANDARD EVENT REGISTER The PPCK+ contains an 8 bit Standard event register that reflects specific PPCK+ events. Enabled events in this register will set or clear the ESB bit of the Status Byte Register. Table 15.

  • Page 119: Ready Status Register

    PPCK+™ Operation and Maintenance Manual 4.5.4 READY STATUS REGISTER The PPCK+ contains an 8 bit Ready Status Register that reflects specific PPCK+ measurement and generation ready events. Enabled events in this register will set or clear the RSB bit of the Status Byte Register. Table 16.

  • Page 120: Program Message Descriptions

    PPCK+™ Operation and Maintenance Manual 4.6.1 PROGRAM MESSAGE DESCRIPTIONS ∗CLS Purpose Clear all of the status & event structures. Command “∗CLS” Remarks This program message clears the following events and status registers: Standard Byte Register (STB) Standard Event Status Register (ESR) Error Queue Pending OPC operations Example...
  • Page 121 PPCK+™ Operation and Maintenance Manual ∗OPC Purpose Sets the operation complete bit when all operations have completed. Command “∗OPC” Query “∗OPC?” Remarks This Command enables the PPCK+ to set the OPC bit in the Standard Event Status Register when it has completed all pending functions. The Query replies with a “1”...
  • Page 122 PPCK+™ Operation and Maintenance Manual ∗STB Read the Status Byte Register. Purpose Command “∗STB?” Remarks The Status Byte Register reflects the general status of the PPCK+. The ‘MSS’ bit state is represented by bit 6. Example Sent: “∗STB?” (enhanced) Reply: “80”...

  • Page 123: Maintenance, Adjustments And Calibration

    PPCK+™ Operation and Maintenance Manual 5. M AINTENANCE DJUSTMENTS ALIBRATION 5.1 OVERVIEW PPCK+ was designed for maintenance free operation. No maintenance is required other than: • Rezeroing of reference transducer (RPT) as needed (see Section 3.4.1). • Regular RPT recalibration (see Section 5.2). •...

  • Page 124: Calibration Of Reference Pressure Transducers

    PPCK+™ Operation and Maintenance Manual 5.2 CALIBRATION OF REFERENCE PRESSURE TRANSDUCERS 5.2.1 PRINCIPLE PPCK+ has reference pressure transducers (RPT) that is the source of precise pressure measurement for the system. The RPT has three independent ranges. To calibrate a range, pressures from a standard are applied to the RPT at ascending and descending points over the range.

  • Page 125: Pa And Pm Coefficients

    PPCK+™ Operation and Maintenance Manual 5.2.1.1 PA AND PM COEFFICIENTS The coefficients used to adjust RPT readings are designated PA (an adder or offset) and PM (a multiplier or span set). The coefficients affect the RPT reading following: Corrected reading = (uncorrected reading • PM) + PA PA is expressed in units of pressure (always the SI unit, Pascal).

  • Page 126: Order Of Operations

    PPCK+™ Operation and Maintenance Manual 5.2.1.3 ORDER OF OPERATIONS If the PPCK+ on-board barometer is to be used as the source of ZSTD for autozeroing in absolute mode, the on-board barometer should be adjusted prior to calibrating the PPCK+’s RPT. The ZNATERR determination should be performed AFTER the RPT ranges have been calibrated and new PA and PM values activated.

  • Page 127: Equipment Required

    PPCK+™ Operation and Maintenance Manual 5.2.2 EQUIPMENT REQUIRED The following specific items, in addition to a normally equipped pressure calibration laboratory, are required to calibrate a PPCK+: 1. Gas operated piston gauge (deadweight tester), with the following characteristics: • Measurement uncertainty of ± 0.005 % of reading or better, if best PPCK+ measurement uncertainty is to be obtained.

  • Page 128: Set-Up And Preparation

    PPCK+™ Operation and Maintenance Manual 5.2.3 SET-UP AND PREPARATION To set-up and prepare the PPCK+ for calibration of an RPT: Set the PPCK+ on a stable surface near the calibration standard at a height as close as possible to the calibration standard's reference height. Consider the connections that may need to be made to the rear panel and access to the front panel display and keypad.
  • Page 129 PPCK+™ Operation and Maintenance Manual OPERATION Select the desired range from the main run screen using the RANGE function. To view or edit calibration information for the active range, press [SPECIAL] and select <4Internal>, <2Cal>, <1RPT>. Select <1view> or <2edit>. The <1view> selection displays the calibration information fields.

  • Page 130: Setting Znaterr

    PPCK+™ Operation and Maintenance Manual 5.2.6 SETTING ZNATERR PURPOSE Setting ZNATERR is required as part of the calibration process for absolute RPTs that will be used in the absolute measurement mode if the autozeroing feature will be used between calibrations (see Sections 5.2.1, 3.4.1). ZNATERR is range specific and absolute measurement mode specific.
  • Page 131 PPCK+™ Operation and Maintenance Manual OPERATION The typical procedure for calibrating an RPT range is: Set-up and prepare the PPCK+ for calibration (see Sections 5.2.2, 5.2.3). From the main run screen, using the [RANGE] function key, select the range to be calibrated (see Section 3.2.1).

  • Page 132: Adjustment Of On-Board Barometer

    PPCK+™ Operation and Maintenance Manual 5.3 ADJUSTMENT OF ON-BOARD BAROMETER PURPOSE To adjust the output of the on-board barometer (see Section 1.2.2.2). PRINCIPLE The on-board barometer output can be adjusted using PA and PM values in the same manner as the reference pressure transducer (see Section 5.2.1).

  • Page 133: Reloading Embedded Software Into Flash Memory

    PPCK+™ Operation and Maintenance Manual In the event that PPCK+ is used to test some devices or systems that contain small amounts of liquid contaminant, PPCK+ has been designed to protect itself from contamination. PPCK’s thermal pressure control unit (TPCU) is designed as a trap for liquids that may make their way into PPCK+.

  • Page 134: Subassembly Description And Location

    PPCK+™ Operation and Maintenance Manual 5.6 SUBASSEMBLY DESCRIPTION AND LOCATION Low Pressure Pneumatic Module On-Board Barometer High Pressure Pneumatic Module Micro Card (behind Barometer) Driver Board Thermal Pressure Control Unit Power Supplies: +5V DC, +12V DC Reference Pressure Transducer Figure 11. Internal View 5.6.1 LOW PRESSURE PNEUMATIC MODULE The low pressure pneumatic module is an integrated assembly that includes six solenoid...

  • Page 135: Driver Board

    PPCK+™ Operation and Maintenance Manual SUPPLY Port (DH200 F) High Pressure Exhaust Valve HP Inlet Valve Dome Exhaust Valve HP Exhaust Valve Dome Exhaust Valve High Pressure Inlet Valve VENT Port (1/8 in. NPT F) HP Inlet Valve Dome Supply Valves TEST Port (DH200 F) Drive Air Lines DRAIN Port (DH200 F)

  • Page 136: Power Supplies

    PPCK+™ Operation and Maintenance Manual 5.6.4 POWER SUPPLIES • +12 V DC (± 2 %) @ 3.3 Amps: For internal and external valve actuation, thermal pressure control unit (TPCU). • +5 V DC (± 1 %) @ 3.0 Amps; + 15 V DC (± 3 %) @ 2.0 Amps; -15 V DC (± 3 %) @ 0.35 Amps: For the supply of the micro board and driver board electronics.

  • Page 137: Troubleshooting

    PPCK+™ Operation and Maintenance Manual 6. T ROUBLESHOOTING PPCK+ is a sophisticated pressure setting and measuring instrument with advanced on-board features and functions. Before assuming that unexpected behavior is caused by a system defect or breakdown, the operator should use this manual and other training facilities to become thoroughly familiar with PPCK+ operation.
  • Page 138 PPCK+™ Operation and Maintenance Manual Table 18. Troubleshooting Guide (Continued) SYMPTOM POSSIBLE CAUSE SOLUTION Encountered unresolved internal Cycle power to clear. Please Displays <FATAL ERROR> or software conflict. record conditions leading up to <FATAL FAULT>. event including the numbers displayed when [ENTER] is pressed and report to your DHI Authorized Service Provider (Table 22).
  • Page 139 PPCK+™ Operation and Maintenance Manual Table 18. Troubleshooting Guide (Continued) SYMPTOM POSSIBLE CAUSE SOLUTION Disagreement between Readings by different ranges at Check that ZOFFSET value is in measurements made by different the same pressure in absolute tolerance and verify value of ranges at the same pressure is measurement mode can ZNATERR (3.4.1, 1.2.2.1, 5.2.6).
  • Page 140 PPCK+™ Operation and Maintenance Manual Table 18. Troubleshooting Guide (Continued) SYMPTOM POSSIBLE CAUSE SOLUTION Poor pressure control PPCK+ is contaminated with Purge PPCK+ from the drain. characterized by excessive liquids. Avoid sources of liquids in the overshooting and/or future. Contact Authorized undershooting, inability to lock-on Service Center if purging does target, unstable readings.
  • Page 141 PPCK+™ Operation and Maintenance Manual Table 18. Troubleshooting Guide (Continued) SYMPTOM POSSIBLE CAUSE SOLUTION Apparently inaccurate pressure An unplanned "head" Remove or change "head" measurement/control and <h> correction is active or head correction (3.2.7). is displayed on top line of height or gas is incorrect.
  • Page 142 PPCK+™ Operation and Maintenance Manual Page 134 ©2001 DH Instruments, Inc.

  • Page 143: Appendix

    PPCK+™ Operation and Maintenance Manual 7. A PPENDIX 7.1 DRIVERS The PPCK+ drivers option provides eight open collector drivers for operating external valves, solenoids, indicators, etc. When operating from the setup-driver screen (see Section 3.3.4), pressing enter will allow the operating mode of the drivers to be set. The two modes of operation are Momentary and Toggle.

  • Page 144: Table 20. External Drivers

    PPCK+™ Operation and Maintenance Manual Table 20 and Figure 13 should be used as reference when building a cable to utilize the drivers port. Table 20. External Drivers EXTERNAL DRIVERS DESCRIPTION Driver #1 (Open Collector) Driver #2 (Open Collector) Driver #3 (Open Collector) Driver #4 (Open Collector) Driver #5 (Open Collector) Driver #6 (Open Collector)

  • Page 145: Unit Conversion

    PPCK+™ Operation and Maintenance Manual 7.2 UNIT CONVERSION 7.2.1 PRESSURE PPCK+ performs all internal calculations in SI units. Numerical values input or output in other units are converted to SI immediately after entry and back to other units just before output as needed.

  • Page 146: Glossary

    PPCK+™ Operation and Maintenance Manual 7.3 GLOSSARY Absolute Mode Measurement mode in which the RPT indicates absolute pressure (difference from vacuum). Atm Ref The on-board barometer reading. ATMOFFSET The difference between the reading of the on-board barometer at the last tare and the current reading of the on-board barometer.
  • Page 147 PPCK+™ Operation and Maintenance Manual Whether pressure is being measured relative to absolute zero or vacuum (absolute Measurement Mode mode) or relative to atmospheric pressure (gauge mode). Pressure adder, used to offset an RPT range or barometer in calibration. Pressure multiplier, used to adjust span of an RPT range or barometer in calibration.

  • Page 148: Warranty Statement

    PPCK+™ Operation and Maintenance Manual Levels of security that can be set to protect certain PPCK+ functions from being User Level accessed. ZNATERR The disagreement between the RPT indication and ZSTD at the autozero pressure just after the RPT has been calibrated. ZCURERR The disagreement between the RPT indication and ZTSD at some time after the RPT has been calibrated.

  • Page 149: Table 22. Dhi Authorized Service Providers

    PPCK+™ Operation and Maintenance Manual Table 22. DHI Authorized Service Providers DH INSTRUMENTS, INC. AUTHORIZED SERVICE PROVIDERS 2000 JAN COMPANY ADDRESS TELEPHONE, FAX NORMAL EMAIL SUPPORT REGION 4765 East Beautiful Lane Tel 602.431.9100 Worldwide DH Instruments, Inc. Phoenix AZ 85044-5318 Fax 602.431.9559 jbaines@dhinstruments.com Minerva I.P.&M.
  • Page 150 PPCK+™ Operation and Maintenance Manual Page 142 ©2001 DH Instruments, Inc.

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