Druck PACE Manual

Introduction

This technical manual gives calibration instructions for the PACE Pressure Controllers and Indicators.
The features shown and described in this manual will not be available on some models. For the full specification, refer to the Druck website:

https://druck.com

Calibration Check

PACE controllers and indicators include a calibration function. To make sure the PACE is within specification, a calibration check must be done at chosen intervals. If the 'as found' calibration data of the PACE is not within the permitted deviation, do a calibration adjustment.

Calibration Status

The Measured Pressure or Instrument Status menu shows the calibration status of the instrument on the front panel screen. The Calibration History lists the dates of the stored calibration corrections.
Note: The Date and Time must be set correctly in the Measured Pressure or Global Setup or Calibration menu.

Calibration Equipment

The original Druck Calibration Certificate shows the measurement uncertainty of the original pressure calibration standard. For preservation of the uncertainty of the PACE calibration, checks and adjustments must be done using a calibrator uncertainty of less than or equal to the original pressure calibration standard. It is important when measuring the stability of a sensor (especially in Tallis units) that the unit is returned to the same calibration lab and ideally the same primary standard is used. This removes differences between standards from the drift calculation.

Preliminary Operations

Review and understand the whole procedure before doing a calibration.
Before doing a calibration:

1. Energize the PACE and allow it to thermally stabilize for at least 2 hours in a thermally stable environment.
2. Do a Leak Test as detailed in PACE User Manual K0443 (PACE Control Module only).

Notes on Calibration

The pressure calibration standard output port and the PACE reference level must be at the same level. See illustrations below for PACE reference level. If the pressure calibration standard is not at the PACE reference level, use height-corrected applied pressure.

Figure 1: PACE 1000 and PACE Tallis Reference Level

1. Reference Level

Figure 2: PACE Control Module Reference Level

1. Reference Level

Set the PACE units of pressure to one of the necessary units for calibration.

Pressure Connection Overview

Turn off the source pressure(s) and carefully open the pressure lines to atmosphere before disconnecting or connecting the pressure lines. Proceed with care.
Only use equipment with the correct pressure rating.
Before applying pressure, examine all fittings and equipment for damage. Replace all fittings and equipment that have damage. Do not use any fittings and equipment that have damage.
Do not apply more than the maximum working pressure of the instrument. This equipment is not rated for oxygen use.

Pressure Adapters
Figure 3 shows the available range of PACE pressure adapters

Figure 3: Pressure Adapters

Refer to Table 1 and the Datasheet for more information.

Table 1: Pressure Adapters and other Parts

Pressure Connection

Parallel threads must be used. Female thread type is parallel thread to ISO228/1 (DIN ISO228/1, JIS B0202) G1/8.
DO NOT CONNECT TAPERED THREADS DIRECTLY TO THE INDICATOR. Connect NPT tapered threads through a suitable pressure adapter.
The PACE has parallel thread pressure connectors. Use only the connector type shown in Table 2.

Table 2: PACE Pressure Connector Thread Specification

Refer to Figure 4 for connection to the PACE pressure connectors.

Figure 4: PACE Pressure Connection

For pressures less than 100 bar (1450 psi), see alternative sealing method in Figure 5.

Figure 5: Alternative Sealing Method for < 100 bar (1450 psi)

PACE Controller Connection for Output Sensor Calibration

Except for the barometric sensor calibration, connect the SUPPLY + port to the OUTLET port when calibrating the PACE controller module. Failure to follow this procedure may result in the sudden uncontrolled release of trapped pressure.
INFORMATION
For optimum performance, connect the PACE reference port to the pressure calibration standard with a snubber to atmosphere. This is not normally necessary for pressure ranges of 7 bar and above.

1. Connect the output of the pressure calibration standard to the PACE modules as shown in the diagrams.
   Note: For gauge sensor calibration, apply both positive and negative gauge pressures to the PACE outlet port.
2. For control module types CM0, 1 and 2, to attenuate changes in atmospheric pressure, or changes due to drafts, connect the PACE reference port to the pressure calibration standard reference port. Add a snubber (IO-SNUBBER-1) to the connecting pipe to prevent line pressure changes due to temperature changes.
   Figure 6: Connections for Control Modules Type CM0, 1 and 2
   

1. PACE Pressure Controller (seen from rear).
2. Control Module 2.
3. Control Module 1.
4. Pressure calibration standard.
5. Snubber.
6. Atmosphere

3. For control module type CM3, connect only the module outlet and supply +ve to the calibration standard.
   Figure 7: Connection for Control Module Type CM3
   

PACE Controller Connection for Barometric Sensor Calibration

1. Connect the output of the pressure calibration standard to the PACE module reference port.
   Note: You do not need to connect the Supply+ and Outlet port for this connection.
   Figure 8: Connection for Barometric Sensor Calibration
   

1. PACE Pressure Controller (seen from rear).
2. Control Module 2.
3. Control Module 1.
4. Pressure calibration standard.

PACE Controller Connection for Low Pressure Calibration

Figure 9: Connection for Low Pressure Measurement

1. PACE Pressure Controller (seen from rear).
2. Control Module 2.
3. Control Module 1.
4. Pressure calibration standard.
5. Low pressure differential connection kit (IO-DIFF-KIT-LP).

PACE Indicator Connection for Input Sensor Calibration

INFORMATION
For optimum performance, connect the PACE reference port to the pressure calibration standard with a snubber to atmosphere. This is not normally necessary for pressure ranges of 7 bar and above.

1. Connect the output of the pressure calibration standard to the PACE input port.
   Note: For gauge sensor calibration, apply positive and negative gauge pressures to the PACE input port.
2. To attenuate changes in atmospheric pressure, or changes due to drafts, connect the PACE reference port to the pressure calibration standard reference port. If a reference connection is unavailable, fit snubber IO-SNUBBER-1 to the PACE reference port.
   Figure 10: Connection for Input Sensor Calibration
   
   1. PACE Pressure Indicator (seen from rear).
   2. Pressure calibration standard.
   3. Snubber
   4. Atmosphere.

PACE Indicator Connection for Barometric Sensor Calibration

This connection also applies to PACE1000 units with IRS3 sensors and the PACE Tallis units fitted with a barometer.

1. Connect the output of the pressure calibration standard to the PACE reference port.
   Figure 11: Connection for Barometric Sensor Calibration
   
   1. PACE Pressure Indicator (seen from rear).
   2. Pressure calibration standard.

PACE Indicator Connection for Low Pressure Calibration

Use this connection when there is no line pressure, for low pressure and low noise measurement in gauge or pseudo gauge mode.
Figure 12: Connection for Low Pressure Measurement

1. PACE Pressure Indicator (seen from rear).
2. Pressure calibration standard.
3. Low pressure differential connection kit (IO-DIFF-KIT-LP).

PACE Indicator Connection for Absolute Pressures

This connection also applies to PACE1000 units with IRS3 sensors and the PACE Tallis units.
Figure 13: Connection for Absolute Pressures

1. PACE Pressure Indicator (seen from rear).
2. Absolute Sensor or instrument.

Calibration Check A - Control Modules

INFORMATION
This check is for Control Modules CM0, 1 and 2 (and CM3 up to and including 3.5 bar Absolute).
Zero the gauge ranges (CM0, CM1, CM2) immediately before a calibration check. For CM3 8 bar absolute ranges and above, zero the Reference Sensor. See the user manual.
Zeroing is not necessary for CM3 2 bar and 3.5 bar ranges.
Note: The PACE adds the barometric reading to a gauge range to produce a pseudo-absolute range (for CM2 and below). For CM3 the PACE subtracts the barometric reading from an absolute range to produce a pseudo-gauge range.
Note: Use the Calibration check mode, as this removes any additional pressure processing enabled by the user.
For PACE calibration menus, refer to Appendix A.
To check the calibration of PACE, proceed as follows:

1. Connect the PACE to the pressure calibration standard.
2. With the pressure calibration standard connected to the correct pressure port, on the PACE screen, select the measured pressure thenRange to select the pressure range to be checked.
3. For gauge ranges (CM0, 1, 2), apply zero pressure to the UUT.
   1. Select the measured pressure thenZero to zero the selected gauge range.
   2. On completion of the zero operation, the display shows 'Zero completed successfully'.
4. Select the measured pressure thenGlobal Setup > Calibration and enter the Calibration PIN (4321).
5. SelectSensor Correction.
6. Select the pressure range to be checked or corrected.
7. Select the pressure sensor to be checked or corrected.
8. SelectCalibration Check.
9. Adjust the applied calibration pressure to the first pressure value and wait until this pressure, displayed on PACE is stable to less than 5 ppm (0.0005%) for CM2 and below (aim for 1 ppm (0.0001%) on CM3). The standard deviation of the measured pressure is shown on the screen in the pressure units to help with measuring the deviation in pressure.
10. Compare the pressure value on the pressure calibration standard to the value shown on the PACE and record the difference.
11. Do steps (9) and (10) again for each calibration pressure.
12. If the recorded difference is more than the permitted deviation (Precision) for the selected range, it is necessary to do a calibration adjustment for that range on the calibrator. Refer to PACE Datasheet for permitted precision deviation and accuracy.
    Note: If it has been less than 24 hours since calibration, the PACE specification equals the Datasheet precision specification with respect to the original pressure calibration standard. If it has been greater than 24 hours since calibration, the PACE specification is the Route-SumSquared (RSS) of the Datasheet precision and the long term stability specification with respect to the original pressure calibration standard.
13. If no adjustment has been done and the calibration check is within the precision limits, then the calibration date can be updated by selecting theAs Found Calibration Icon.
14. Select the next pressure range for a calibration check.
15. After completing all calibration checks, adjust the pressure calibration standard to atmospheric pressure.
16. Disconnect the pressure calibration standard from the output.
17. If no further calibration is necessary, de-energize the PACE.

Calibration Adjustment A1 - Control Modules

INFORMATION
This adjustment is for Control Modules CM0, 1 and 2 up to and including 3.5 bar Absolute.
For PACE calibration menus, refer to Appendix A.
To adjust the calibration of PACE:

1. Connect the PACE to the pressure calibration standard.
   Note: Calibration adjustments can be carried out in any order. Three calibration points are necessary for gauge sensors. Two calibration points are necessary for absolute sensors.
2. Select the measured pressure thenGlobal Setup > Calibration and enter the Calibration PIN (4321).
3. SelectSensor Correction.
4. Select the pressure range to be corrected.
5. Select the pressure sensor to be corrected.
6. SelectCalibration Adjustment.
7. Adjust the applied calibration pressure to the first pressure value and wait until this pressure, shown on PACE, is stable to less than 5 ppm (0.0005%) for CM2 and below (aim for 1 ppm (0.0001%) on CM3). The standard deviation of the measured pressure is shown on the screen (σ) in the pressure units to aid with measuring the deviation in pressure.Note: The display also shows throughout this procedure the message 'Calibrating' and the selected pressure range.
8. Use the on-screen keypad to enter the applied pressure, then select the entered value to save it.
9. The screen will now ask'keep calibration point?' select the shown pressure to keep the calibration used or select the undo icon to enter again the applied pressure.
10. Do steps (7) to (8) again for the next value.
11. SelectRepeat to re-apply the same pressure and Quit Calibration to exit the calibration of this pressure range.
12. Do a calibration check to make sure this procedure worked. "Calibration Check A - Control Modules".
13. After completing the calibration procedures, adjust the pressure calibration standard to atmospheric pressure. Slowly open the On/Off valve to release any trapped pressure in the SUPPLY+ port. Disconnect the pressure calibration standard from the PACE.
14. If no further calibration is necessary, de-energize the PACE.

Calibration Adjustment A2 - Control Modules

INFORMATION
This adjustment is for Control Modules CM3 and CM3-B at 8 bar absolute and above.
CM3 and CM-3B control modules both have barometers that need calibration check and if required adjustment.
Note: Zeroing the Reference Sensor is not necessary for calibration adjustment as this is reset automatically during the adjustment process.

1. Do a calibration check (Section steps (1) to (5) and (8) to (14)) on the Barometer first. If the recorded difference is more than the permitted deviation then the Barometer must be adjusted.
2. Do the steps in Section Calibration Adjustment A1.

Calibration Check B - PACE Indicators

INFORMATION
This check is for PACE1000 and PACE Tallis.
Zero the gauge ranges (PACE1000 IPS) immediately prior to a calibration check.
For PACE1000 and PACE Tallis 8 bar absolute ranges and above, zero the main sensor. See the user manual.
Zeroing is not necessary for PACE1000, PACE Tallis 2 bar and 3.5 bar absolute ranges.
Note: The PACE adds the barometric reading to a gauge range to produce a pseudo-absolute range. The PACE subtracts the barometric reading from an absolute range to produce a pseudogauge range.
Note: Use the Calibration check mode, as this removes any addition pressure processing enabled by the user.
For PACE calibration menus, refer to Appendix A.
To check the calibration of PACE:

1. Connect the PACE to the pressure calibration standard.
2. With the pressure calibration standard connected to the correct pressure port, select the measured pressure and select Range to select the pressure range to be checked.
3. For gauge ranges (IPS sensors), apply zero pressure to the UUT.
   1. Select the measured pressure thenZero to set the selected gauge range to zero.
   2. On completion of the zero operation, the display shows 'Zero completed successfully'.
4. Select the measured pressure thenGlobal Setup > Calibration and enter the Calibration PIN (4321).
5. SelectSensor Correction.
6. Select the pressure sensor to be checked or corrected.
7. SelectCalibration Check.
8. Adjust the applied calibration pressure to the first pressure value and wait until this pressure, shown on PACE is stable to less than 5 ppm (0.0005%) for IPS sensors and below (aim for 1 ppm (0.0001%) on IRS3 and TRS3 (Tallis)). The standard deviation of the measured pressure is shown on the screen in the pressure units to help with measuring the deviation in pressure.
9. Compare the pressure value on the pressure calibration standard to the value shown on the PACE and record the difference.
10. Do steps (8) and (9) again for each pressure.
11. If the recorded difference is more than the permitted deviation (precision) for the selected range, a calibration adjustment for that range is necessary on the calibrator. Refer to the PACE Datasheet for permitted precision deviation and accuracy.
    Note: If it has been less than 24 hours since calibration, the PACE specification equals the Datasheet precision specification with respect to the original pressure calibration standard. If it has been greater than 24 hours since calibration, the PACE specification is the Route-SumSquared (RSS) of the Datasheet precision and the long term stability specification with respect to the original pressure calibration standard.
12. If no adjustment has been done and the calibration check is within the precision limits, then the calibration date can be updated by selecting the 'As Found' calibration icon.
13. Select the next pressure range for a calibration check.
14. After completing all calibration checks, adjust the pressure calibration standard to atmospheric pressure.
15. Disconnect the pressure calibration standard from the output.
16. If no further calibration is necessary, de-energize the PACE.

Calibration Adjustment B1 - PACE Indicators

INFORMATION
This adjustment is for PACE1000 IPS. It is also for IRS and TRS (Tallis) up to and including 3.5 bar absolute.
For PACE calibration menus, refer to Appendix A.
To adjust the calibration of PACE:

1. Connect the PACE to the pressure calibration standard.
   Note: Calibration adjustments may be done in any order. Three calibration points are necessary for gauge sensors. Two calibration points are necessary for absolute sensors.
2. Select the measured pressure thenGlobal Setup > Calibration and enter the Calibration PIN (4321).
3. SelectSensor Correction.
4. Select the pressure range to be corrected (PACE controllers only).
5. Select the pressure sensor to be corrected.
6. SelectCalibration Adjustment.
7. Adjust the applied calibration pressure to the first pressure value and wait until this pressure, displayed on PACE, is stable to less than 5 ppm (0.0005%) for IPS sensors and below (aim for 1 ppm (0.0001%) on CM3). The standard deviation of the measured pressure is displayed on the screen in the pressure units to aid with measuring the deviation in pressure.Note: The display also shows throughout this procedure the message 'Calibrating' and the selected pressure range.
8. Use the on-screen keypad to enter the applied pressure, then select the entered value to save it.
9. The screen will now ask 'Keep calibration point?' select the displayed pressure to keep the calibration used or select the undo icon to renter the applied pressure.
10. Do steps (7) to (9) again for the next value.
11. SelectRepeat to re-apply the same pressure and Quit Calibration to exit the calibration of this pressure range.
12. Do a calibration check to make sure this procedure worked.
13. After completing the calibration procedures, adjust the pressure calibration standard to atmospheric pressure. Disconnect the pressure calibration standard from the PACE.
14. If no further calibration is necessary, de-energize the PACE.

Calibration Adjustment B2 - PACE Indicators

INFORMATION
This adjustment is for PACE1000 IRS3 and PACE Tallis TRS3 at 8 bar absolute and above.
Note: Zeroing the Reference Sensor is not necessary for calibration adjustment as this is reset automatically during the adjustment process.

1. Do a calibration check (see "Calibration Check B - PACE Indicators") on the Barometer first. If the recorded difference is more than the permitted deviation then the Barometer must be adjusted (see "Calibration Adjustment B1 - PACE Indicators").
2. Do the steps in "Calibration Adjustment B1 - PACE Indicators".

PACE Tallis Linearity Adjustment

INFORMATION
The linearity of the Tallis sensors does not usually need adjusting. This adjustment allows the linearity to be improved to an individual pressure standard within the range of -127 to +127 ppm of the sensor full scale. 11 adjustment points are available, which can be applied at any pressure over the range of the sensor and do not have to be equally-spaced. Pressure points must be applied in ascending order. We recommend that there is 1 point at the lowest and highest. Linearity correction is interpolated linearly between points. We recommend a minimum of 5 points. 11 points give optimal performance.

1. Connect the PACE Tallis to the pressure calibration standard.
2. Select the measured pressure, thenGlobal Setup > Calibration and enter the Calibration PIN (4321).
3. SelectSensor Correction.
4. Select the pressure sensor to be corrected.
5. SelectLinearization.
6. Adjust the applied calibration pressure to the first pressure value and wait until this pressure, shown on the PACE, is stable (aim for 1 ppm (0.0001%)). The standard deviation of the measured pressure is shown on the screen (σ) in the pressure units to aid with measuring the deviation in pressure.
   Note: The display also shows throughout this procedure the message 'Calibrating' and the selected pressure range.
7. Use the on-screen keypad to enter the applied pressure, then select the value on the display to save it.
8. The display will now show 'Keep calibration point?'. Select the pressure shown to keep the calibration used or select the undo icon to re-enter the applied pressure.
9. Repeat steps (7) to (9) for the next value.
10. SelectRepeat to re-apply the same pressure and Quit Calibration to exit the calibration of this pressure range.
11. Do a calibration check to make sure this procedure has worked.
    After completing the calibration procedures, adjust the pressure calibration standard to atmospheric pressure.

Recommended Calibration Check Points

Recommended Calibration Adjustment Pressures

PACE Menus and Screens

A.1 PACE Controller Menus

A.2 PACE Controller Screens

A.3 PACE Indicator Menus

A.4 PACE Indicator Screens

Pressure Units and Conversion Factors

To convert from pressure VALUE 1 in pressure UNITS 1, to pressure VALUE 2 in pressure UNITS 2, calculate as follows: