Remote Automation Solutions DP-Prognosis FC (ROC800) Manuals & Guides

Remote Automation Solutions

Part Number D301813X012

QER 17Q001 January 2017

DP – Prognosis™ FC User Manual (for ROC800-Series)

DP – Prognosis FC User Manual (for ROC800-Series)

ii Issued January-2017

Revision Tracking Sheet

January 2017

This manual may be revised periodically to incorporate new or updated information. The revision date of each page appears at the bottom of the page opposite the page number. A change in revision date to any page also changes the date of the manual that appears on the front cover. Listed below is the revision date of each page (if applicable):

Page

Revision

Initial release

January-2017

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Contents iii

Chapter 1 – Introduction

Caution

When implementing control using this product, observe best industry practices as suggested by applicable and appropriate environmental, health, and safety organizations. While this product can be used as a safety component in a system, it is NOT intended or designed to be the ONLY safety mechanism in that system.

This chapter describes the structure of this manual and an overview of the DP – Prognosis™ FC program for the ROC800-Series Remote Operations Controller (ROC800).

1.1 Scope and Organization

This document serves as the user manual for the DP – Prognosis FC program, which is intended for use in the ROC800-Series Remote Operations Controllers (ROC800).

This manual describes how to download and configure this program (referred to as the “DP – Prognosis FC program” or “the program” throughout the rest of this manual). You access and configure this program using ROCLINK™ 800 Configuration Software (version 2.41 or greater) loaded on a personal computer (PC) running Windows® 7 (32 or 64-bit).

The sections in this manual provide information in a sequence appropriate for first-time users. Once you become familiar with the procedures and the software running in ROC800, the manual becomes a reference tool.

This manual has the following major sections:

 Chapter 1 – Introduction  Chapter 2 – Installation  Chapter 3 – Configuration  Chapter 4 – Reference

This manual assumes that you are familiar with the ROC800 and its configuration. For more information, refer to the following manuals:

 ROC800 Remote Operations Controller Instruction Manual (part

D301217X012)

 ROCLINK 800

™

Configuration Software User Manual (for

ROC800-Series) (part D301250X012)

DP – Prognosis FC User Manual (for ROC800-Series)

2 Introduction Issued January-2017

1.2 Product Overview

The DP – Prognosis FC program is used to verify the operation of a differential pressure (DP) meter element and its differential pressure instrumentation. The program is designed to work with Orifice Meters, Venturi meters or Cone meters.

1.2.1 Theory of Operation

A DP meter uses a geometric constriction to produce momentum change in a flow. Figure 1-1 shows an orifice meter and the associated pressure profile in the pipe.

Figure 1-1. Traditional orifice meter pressure profile

Applying mass and energy conservation equations between pipe cross sections upstream and in the vicinity of the constriction produces a flow rate equation dependent on geometry, fluid density and DP.

Traditionally, the differential pressure is measured between a point upstream of the restriction and the point of lowest pressure (vena contracta). Flow calculations are performed using this differential pressure value.

It has been shown that the constriction in a DP meter element actually produces three predictable and repeatable pressure changes in the flow stream. The Traditional DP (∆Pt) – mentioned previously - is measured

across the restriction. The Recovery DP (∆P

rec

) can be measured between the downstream tap and a far downstream tap (~6 diameters downstream for an orifice meter). The Permanent DP (∆P

ppl

) is measured between the upstream pressure tap and the far downstream tap. Figure 1-2 shows how these three values can be observed.

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Issued January-2017 Introduction 3

Figure 1-2. Three differential pressures for the DP meter

The DP – Prognosis FC approach involves:  Measuring all three DPs at the meter element (optionally, two of the

DPs can be measured and one can be inferred, but this produces less reliable results).

 Performing flow calculations for all three meters.  Comparing the flow rates of the three meters – producing three

diagnostic values (diagnostics).

 Comparing the pressure loss ratios of the three DPs to theoretical

values for pressure loss ratios – producing three diagnostic values (diagnostics).

 Comparing the numerical values of the three DPs for consistency

(∆Pt = ∆P

rec

+ ∆P

ppl

).

As can be seen, this results in seven different uncertainty parameters – referred to as diagnostics. Customarily, the seven diagnostics are each compared to allowable uncertainty setpoints – thereby converting the values to dimensionless form. For instance,

Calculated traditional flow rate = 10.100

Calculated permanent flow rate = 10.800 Percent Difference = 100 * (10.800 – 10.100) / 10.100 = 6.93% If the allowable percentage for this difference was configured to 2%,

then the dimensionless value of the first diagnostic (x1) would be:

6.93% / 2% = 3.47

In dimensionless form, any value between -1.0 and 1.0 is considered to be indicative of a properly-performing meter.

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4 Introduction Issued January-2017

1.2.2 Practical Application

The DP – Prognosis FC approach can be used to monitor the operation of a DP meter with the intent of identifying uncertainty in the traditional calculated measurement. Using the DP diagnostic approach, the following conditions have been identified in orifice meters:

 Orifice plate installed backwards  Damaged orifice plate (worn sharp edge, warped plate, dirty plate)  Obstructed flow in meter tube or through orifice  Physical plate or meter tube size different from values configured in

flow computer

 Plugged or leaking transmitter impulse line  Transmitter calibration error  Transmitter calibration drift  Equalizing valve on instrument manifold leaking  Wet gas

1.2.3 Operational Benefits

The DP – Prognosis FC operating at a meter installation, the meter can be managed by exception. Routine, scheduled inspection/calibration procedures can be modified such that technicians address known measurement problems immediately when exceptions are noted – rather than waiting until the problem is discovered during the next scheduled inspection. Furthermore, the time of onset of the exception can be precisely identified – assisting in proper correction to flow data.

Common operating mistakes (installing plate backwards, changing plate without changing flow computer configuration) are quickly identified and clarified when DP diagnostics is running in the Flow Computer.

1.3 Program Features

1.3.1 DP – Prognosis FC for up to 12 Meter runs

The single license enables the Prognosis feature for all meters on the ROC800.

1.3.2 Three Supported Meter Types

The program works with Orifice, Venturi, and Cone meters.

1.3.3 Customary Seven Diagnostics

The program produces the customary seven diagnostic values.

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1.3.4 Support for Stacked DPs

The program supports use of stacked DP instruments for Recovery and for Permanent DP instruments

1.3.5 Supports two or three measured DPs

Although it is not recommended, the program can function using just one additional DP instrument (plus the traditional DP). When either the Recovery DP or the Permanent DP instruments are not configured, the value of the unmeasured DP will be calculated from the other two DPs.

1.3.6 Adjustable Diagnostic Frequency

The diagnostic calculations can be run at a frequency ranging from once per second to once per 255 days.

When main processor loading is a concern, the frequency of the calculation can be reduced to alleviate processor loading.

1.3.7 Multi-pass Averaging

The program can be configured to perform multiple calculation cycles and use the resulting average value of the seven diagnostics. This feature can be used when there is high latency in DP measured values or when wet gas is expected – to reduce nuisance alerts.

1.3.8 Pattern Matching

After the seven diagnostic values are calculated, the relationship of these values to each other is compared with known pattern signatures. This results in a pattern match code and text message which can provide insight as to the particular problem – if any – with the meter.

1.4 Program Requirements

The DP – Prognosis FC program is compatible with version 3.61 (or greater) of the ROC800 firmware or version 1.60 (or greater) of ROC800L with version 2.41 (or greater) of the ROCLINK 800 software.

Program specifics

include:File

Name

Target Unit/

Version

User Defined

Points (UDP)

Flash Used

(in bytes)

DRAM Used

(in bytes)

ROCLINK 800

Version

Display

Number

DPMD.tar

ROC800 v3.61

or ROC800L

v1.60

220

68653

131072

2.41

221

For information on viewing the memory allocation of user programs, refer to the ROCLINK 800 Configuration Software User Manual (for ROC800) (part D301250X012).

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6 Introduction Issued January-2017

1.4.1 License Key

License keys, when matched with valid license codes, grant access to applications such as the DP – Prognosis FC program.

For ROC800 and ROC800L, the term “license key” refers to the physical piece of hardware that can contain up to seven different licenses (refer to Figure 1-1). Each ROC800-series can have none, one, or two license keys installed. If you remove a license key after enabling an application, the firmware disables the task from running. This prevents unauthorized execution of protected applications in a ROC800.

DOC0422A

J1

U1

Figure 1-4. License Key

Note: A single license of the DP – Prognosis FC program for ROC800-

series enables Prognosis FC for all meter runs.

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Issued January-2017 Installation 7

Chapter 2 – Installation

This section provides instructions for installing the DP – Prognosis FC program into the ROC800. Read Section 1.4 of this manual for program requirements.

Note: The program and license key can be installed in any order. The

manual shows the installation of the license key first.

2.1 Installing the License Key

If you order the DP – Prognosis FC program for a new ROC800, your ROC800 is delivered with the license key installed.

If you order the program for an existing ROC800, you must install the license key yourself.

Caution

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

When working on units located in a hazardous area (where explosive gases may be present), make sure the area is in a non-hazardous state before performing these procedures. Performing these procedures in a hazardous area could result in personal injury or property damage.

To install a license key:

1. Remove power from the ROC800.

2. If necessary, remove the wire channel cover.

3. Unscrew the screws from the Central Processing Unit (CPU)

faceplate.

4. Remove the CPU faceplate.

5. Place the license key in the appropriate terminal slot (P4 or P6) in

the CPU (refer to Figure 2-1).

Figure 2-1. License Key Installation

Note: When using a single license key, install it in slot P4.

6. Press the license key into the terminal until it is firmly seated (refer

to Figure 2-1).

7. Re-attach the CPU faceplate.

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8 Installation Issued January-2017

8. Re-attach the screws on the CPU faceplate.

9. If necessary, re-attach the wire channel cover.

10. Restore power to the ROC800.

2.1.1 Verifying the License Key Installation

After you install the license key, you can verify whether the ROC800 recognizes the key. From the ROCLINK 800 screen, select Utilities > License Key Administrator. The License Key Administrator screen displays:

Figure 2-2. License Key Administrator

The DP – Prognosis FC program appears in the Application Name column. (For further information on the License Key Administrator screen, refer to the ROCLINK 800 Configuration Software User Manual (for ROC800-Series), part D301250X012.)

After you verify that the license key is correctly installed and recognized, proceed to Section 2.2.

2.2 Downloading the Program

This section provides instructions for installing the program into the Flash memory on the ROC800.

To download the user program using ROCLINK 800 software:

1. Connect the ROC800 to your computer.

2. Start and logon to the ROCLINK 800.

3. Select ROC > Direct Connect to connect to the ROC800.

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Issued January-2017 Installation 9

4. Select Utilities > User Program Administrator from the

ROCLINK menu bar. The User Program Administrator screen displays (see Figure 2-3):

Figure 2-3. User Program Administrator

5. Select any empty program number (in this case, number 1) into

which to download the program.

6. Click Browse in the Download User Program File frame. The Select

User Program File screen displays (see Figure 2-4).

7. Select the path and user program file to download from the CD-

ROM. (Program files are typically located in the Program Files folder on the CD-ROM.) As Figure 2-4 shows, the screen lists all valid user program files with the .TAR extension:

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10 Installation Issued January-2017

Figure 2-4. Select User Program File

8. Click Open to select the program file. The User Program

Administrator screen displays. As shown in Figure 2-5, note that the Download User Program File frame identifies the selected program and that the Download & Start button is active:

Figure 2-5. User Program Administrator

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Issued January-2017 Installation 11

9. Click Download & Start to begin loading the selected program.

The following message displays:

Figure 2-6. Confirm Download

10. Click Yes to begin the download. When the download completes the

following message displays:

Figure 2-7. ROCLINK 800 Download Confirmation

11. Click OK. The User Program Administrator screen displays (see

Figure 2-8). Note that:

 The Device User Program Environment frame reflects the use of

system memory.

 The User Programs Installed in Device frame identifies the

installed program(s).

 The Status field indicates that the program is running.

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12 Installation Issued January-2017

Figure 2-8. User Program Administrator

12. Click Close. Proceed to Chapter 3 – Configuration to configure the

program.

2.3 MPU Loading Threshold

To maximize the performance of your ROC800 device, always verify the performance of specific application combinations before using them in the field to ensure the MPU load typically remains below 85% with peak MPU loading levels below 95%.

To check the current MPU load at any time, select ROC > Information > Other Information and review the value in the MPU loading field.

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Figure 2-9. MPU Loading

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Chapter 3 – Configuration

This section provides information to configure the DP – Prognosis FC program.

Once you have successfully loaded the DP – Prognosis FC program into the ROC800, a single user display is available. This display contains these tabs:

 Results  Configuration  Advanced  Intermediate  Detail

Note: The DP – Prognosis FC meter runs corresponds to orifice meter

number 1 in the ROC800. For example, Prognosis FC Point Number 1 corresponds to meter number 1 in the ROC. The corresponding meter run in the ROC should be configured and calculating flow before configuring DP meter diagnostics for the run. For further information on the configuration of the orifice meter runs, refer to the ROCLINK 800™ Configuration Software

User Manual (for ROC800-Series) (part D301250X012).

Figure 3-1. Main ROCLINK 800 screen

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16 Configuration Issued January-2017

To access the program:

1. From the Directory Tree, select User Program > Program #1,

DPMD.

2. Double-click Display #221, DPMD Parameters.

Figure 3-2. DPMD Parameters

1. Review the following fields:

Field

Description

Point Number

Sets the meter for diagnostic.

Meter Description

This read-only field displays the meter description.

DP Meter Diagnostic Tag

Sets the description of the meter.

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Field

Description

Program Status

This read-only field displays the program status. For possible status codes and messages, see Section 4.2 of this manual.

Seconds Until Next

Scheduled Diagnostic

This read-only field displays the next scheduled diagnostic in seconds.

Enable Diagnostics

Enables diagnostics for the specified meter.

Run Diagnostic

Command

Select this option to perform an instantaneous diagnostic of the meter.

2. Proceed to the Section 3.1 – Results tab.

3.1 Results

Each time the Prognosis FC calculations complete, the Results tab of the Configuration screen provides the summary results of the calculations.

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Figure 3-3. Results tab

1. Review the following fields:

Field

Description

Diagnostic

Completed

This read-only field displays the timestamp of the most recent diagnostic run. Provides both UNIX timestamp and the formatted date/time.

1 – Traditional Meter

Lists the values for the Traditional Meter. Note: The Prognosis FC calculations are

performed in metric units – regardless of the units of measure configured in the ROC800.

Dp

This read-only field displays the Traditional Dp used for the calculations.

Flow

This read-only field displays the Mass Flow Rate as calculated via the Traditional meter.

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Field

Description

2 – Recovery Meter

Lists the values for the Recovery Meter. Note: The Prognosis FC calculations are

performed in metric units – regardless of the units of measure configured in the ROC800.

Dp

This read-only field displays the Recovery Dp used for the calculations.

Flow

This read-only field displays the Mass Flow Rate as calculated via the recovery meter.

3 – Permanent Meter

Lists the values for the Permanent Meter. Note: The Prognosis FC calculations are

performed in metric units – regardless of the units of measure configured in the ROC800.

Dp

This read-only field displays the Permanent Dp used for the calculations.

Flow

This read-only field displays the Mass Flow Rate as calculated via the Permanent meter.

Inlet Pressure

This read-only field displays the inlet pressure for the meter(s). Note: The Prognosis FC calculations are

performed in metric units – regardless of the units of measure configured in the ROC800.

Alarms

Checkboxes indicate which – if any – of the seven diagnostic parameters exceeds configured acceptable values. When one or more parameters exceeds acceptable values, the red box is displayed around this section of the screen.

Traditional to

Permanent Mass

Flow Rate (x1)

Alarm

When this alarm is selected, there is excessive difference between the mass flow rates derived from the traditional and the permanent meters.

Traditional to

Permanent

Pressure Ratio (y1)

Alarm

When this alarm is selected, there is excessive difference between the observed and theoretical values for permanent pressure ratio.

Traditional to

Recovery Mass

Flow Rate (x2)

Alarm

When this alarm is selected, there is excessive difference between the mass flow rates derived from the traditional and the recovery meters.

Traditional to

Recovery Pressure

Ratio (y2) Alarm

When this alarm is selected, there is excessive difference between the observed and theoretical values for recovery to traditional pressure ratio.

Recovery to

Permanent Mass

Flow Rate (x3)

Alarm

When this alarm is selected, there is excessive difference between the mass flow rates derived from the recovery and the permanent meters.

Recovery to

Permanent

Pressure Ratio (y3)

Alarm

When this alarm is selected, there is excessive difference between the observed and theoretical values for recovery to permanent pressure ratio.

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20 Configuration Issued January-2017

Field

Description

Dp Comparison (x4)

Alarm

When this alarm is selected, there is excessive difference between the observed traditional Dp value and the sum of the recovery and permanent pressure values

Pattern Alarm

This read-only field displays a text message describing the results of the pattern matching algorithm.

2. Proceed to the Section 3.2 – Configuration.

3.2 Configuration

The Configuration tab provides most of the parameters needed to configure Prognosis FC.

Figure 3-4. Configuration tab

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1. Review the values in the following fields:

Field

Description

Meter Type

Selects the appropriate meter type. Click to select a valid option:

 Orifice  Venturi  Cone

Acceptable Variances [%]

These values serve as the alarm thresholds for the different diagnostic parameters. You can increase these values if nuisance alarms are occurring.

of Cd

Sets the acceptable variance (in percent) of the discharge coefficient for the traditional meter.

of Kr

Sets the acceptable variance (in percent) of the flow coefficient for the recovery meter.

of Kppl

Sets the acceptable variance (in percent) of the flow coefficient for the permanent meter.

of PLR

Sets the acceptable variance (in percent) of the ratio of permanent to traditional pressure loss.

of PRR

Sets the acceptable variance (in percent) of the ratio of recovery to traditional pressure loss.

of RPR

Sets the acceptable variance (in percent) of the ratio of recovery to permanent pressure loss.

of traditional Dp

Sets the acceptable variance (in percent) of the traditional DP.

Diagnostic Scheduling

This frame sets the diagnostic calculations for the meter are to be scheduled. If scheduled,

select the Schedule Type. Click to select a valid option:

 Scheduling Disabled  Scheduling in Days  Scheduling in Hours  Scheduling in Minutes  Scheduling in Seconds

Schedule Type

Sets the time interval between scheduled runs of Prognosis FC calculations for the meter. The units of time for the interval are specified with the Diagnostic Scheduling parameter.



Distance to PPL Tap Downstream

Sets the distance from the restriction to the far downstream tap. If this number is less than the 6 diameters, it will be ignored. If the value is greater than 6 diameters, a correction value will be applied to the permanent pressure loss reading to compensate for excessive distance downstream.

L/D

This read-only field displays the ratio of the far downstream tap distance to the diameter of the meter. Ideally, this value should be 6.0.

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22 Configuration Issued January-2017

Field

Description

Obstruction Minor Loss Coefficient

This coefficient is used to compensate for pressure losses caused by obstructions in the meter tube located between the downstream tap and the far downstream tap. One example of such an obstruction would be a thermowell. Note: If a thermowell or other obstruction exists

in the flow stream between the downstream tap and the far downstream tap.

Friction Factor

Sets the friction factor used to calculate additional pressure loss if far downstream tap is located more than 6 diameters downstream.

PLR Offset Factor

Can be used to “zero” the error produced by anomalies, such as wet gas, non-standard tap location, and other pressure losses within the meter

Suggested PLR Offset Factor

This read-only field displays the PLR offset factor calculated by the program which can be

used to “zero” the Diagnostics for the meter

Recovery DP Source

Specifies where the value of the Recovery DP should be read and the conditions (if applicable) which will control switching between stacked DP sensors.

Normal/High

Click to designate input variable from which the DP should be read for non-stacked DP installations. For stacked DP installations, this location designates the parameter for the high DP instrument value.

Low DP Setpoint

Sets the value which provides the threshold for switching from the high DP instrument to the low DP instrument. This is for stacked DP installations.

Low

Click to designate input variable from which the Low DP should be read for stacked DP installations.

High DP Setpoint

Sets the value which provides the threshold for switching from the low DP instrument to the high DP instrument. This is for stacked DP installations.

Permanent DP Source

Specify where the value of the Permanent DP should be read and the conditions (if applicable) which will control switching between stacked DP sensors.

Normal/High

Click to designate input variable from which the DP should be read for non-stacked DP installations. For stacked DP installations, this location designates the parameter for the high DP instrument value.

Low DP Setpoint

Sets the value which provides the threshold for switching from the high DP instrument to the low DP instrument. This is for stacked DP installations.

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Field

Description

Low

Click to designate input variable from which the Low DP should be read for stacked DP installations.

High DP Setpoint

Sets the value which provides the threshold for switching from the low DP instrument to the high DP instrument. This is for stacked DP installations.

Alarming

Specifies the type of alarms to be entered into the ROC800 Alarm log:

No Alarming

No alarms will be entered into the ROC800 alarm log.

Single,Combined

Diagnostic Alarm

If any of the seven diagnostics are outside of acceptable ranges, an alarm is set. The alarm is not cleared until all of the diagnostics are within range.

Alarm Individual

Diagnostics

Alarms are set and cleared individually for each of the seven diagnostics. Warning: This mode can create numerous alarms.

Alarm on Pattern

Match

If the pattern match feature reveals a nonconforming pattern, an alarm is set for that pattern. The alarm is cleared either when the pattern returns a conforming pattern or when a different nonconforming pattern is matched.

Number of Diagnostics to Average

When Prognosis FC calculations are executed, the program can perform multiple consecutive calculations rapidly and average the results.

Click to specify the number of calculation repetitions to perform and average at each scheduled interval.

Note: Improper configuration of this parameter

might result in unexpected or unwanted behavior. For example, setting the scheduling type to seconds and setting the schedule to 5 but setting the number of diagnostics to average to 7 will result in continuous execution of the Prognosis FC at 1-second intervals. In some applications, this may place an undesirable load on the ROC800’s main processor.

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24 Configuration Issued January-2017

2. Enable the Run Diagnostic Command check box and click Apply

to save the changes.

3. Observe the Program Status Description and Code for indications

of either success of operation or configuration problems.

4. Make corrections as necessary.

5. Proceed to Section 3.3 – Advanced.

3.3 Advanced

Once you have successfully configured the DP Meter Diagnostics program for a meter run, you can make adjustments to the Advanced configuration parameters if so you desired.

Figure 3-5. Advanced tab

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1. Review the following fields:

Field

Description

Cd Calculation

Method

The coefficient of discharge for the traditional flow rate calculation can be calculated either from ISO 5167 or from a curve fit. If the meter has been calibrated to derive a more precise definition of discharge coefficient vs Reynolds number, a curve fit of that calibration data can be entered here.

Kr Calculation

Method

The flow coefficient for the recovery flow rate calculation can be calculated either from ISO 5167 or from a curve fit. If the meter has been calibrated to derive a more precise definition of flow coefficient vs Reynolds number, a polynomial curve fit of that calibration data can be entered here.

Kppl Calculation

Method

The flow coefficient for the permanent pressure loss rate calculation can be calculated either from ISO 5167 or from a curve fit. If the meter has been calibrated to derive a more precise definition of flow coefficient vs Reynolds number, a curve fit of that calibration data can be entered here.

Expected/Calibrated

PLR Calculation

The ratio of traditional DP to permanent pressure loss DP can be calculated either from a published equation or from a curve fit. If the meter has been calibrated to derive a more precise definition of pressure loss ratio vs Reynolds number, a curve fit of that calibration data can be entered here.

Expected/Calibrated

PRR Calculation

The ratio of recovery DP to permanent pressure loss DP can be calculated either from a published equation or from a curve fit. If the meter has been calibrated to derive a more precise definition of pressure loss ratio vs Reynolds number, a curve fit of that calibration data can be entered here.

Expected/Calibrated

RPR Calculation

The ratio of traditional DP to recovery pressure loss DP can be calculated either from a published equation or from a curve fit. If the meter has been calibrated to derive a more precise definition of pressure loss ratio vs Reynolds number, a curve fit of that calibration data can be entered here.

Diagnostic Calculations Cutoff Thresholds

Specifies the low DP limits for the diagnostic calculations:

Low Traditional

DP cutoff

Sets the threshold for diagnostic calculations based on the traditional DP value. When the traditional DP value falls below this threshold, the diagnostic calculations will not be executed. This feature can be used to prevent extraneous alarms at very low flow rates.

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26 Configuration Issued January-2017

Field

Description

Low Recovery DP

cutoff

Sets the threshold for diagnostic calculations based on the recovery DP value. When the recovery DP value falls below this threshold, the diagnostic calculations will not be executed. This feature can be used to prevent extraneous alarms at very low flow rates.

Low Permanent

DP cutoff

Sets the threshold for diagnostic calculations based on the permanent DP value. When the permanent DP value falls below this threshold, the diagnostic calculations will not be executed. This feature can be used to prevent extraneous alarms at very low flow rates.

2. Click Apply to save the changes.

3. Proceed to Section 3.4 – Intermediate.

3.4 Intermediate

The Intermediate tab provides information about intermediate values calculated during the Prognosis FC calculations.

Note: The Prognosis FC calculations are performed in metric units –

regardless of the units of measure configured in the ROC800.

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Figure 3-6. Intermediate tab

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28 Configuration Issued January-2017

1. Review the following fields:

Field

Description

Restriction

Diameter (d)

This read-only field displays the temperaturecorrected meter restriction diameter.

Inlet Diameter (D)

This read-only field displays the temperaturecorrected meter inlet diameter.

Beta

This read-only field displays the calculated Beta ratio

Meter Inlet Area

This read-only field displays the cross-sectional area of the meter inlet.

Meter Throat Area

This read-only field displays the cross-sectional area of the meter restriction.

Velocity of Approach factor (E)

This read-only field displays the dimensionless velocity of approach factor for the meter.

Isentropic Exponent (kappa)

This read-only field displays the dimensionless isentropic exponent for the flowing fluid.

Inlet Density (rho)

This read-only field displays the density of the flowing fluid at the meter inlet.

Viscosity (mu)

This read-only field displays the dynamic viscosity of the flowing fluid.

Tradinl Expansion Factor (epsilon)

This read-only field displays the expansion factor of the traditional meter.

Extra L/D

This read-only field displays the additional dimensionless pipe diameters between the ideal and actual location of the far downstream tap.

Kloss

This read-only field displays the total amount of equivalent dimensionless pipe diameters (including Extra L/D and any obstructions) for correcting the far downstream pressure reading.

Head loss (hl)

This read-only field displays the amount by which the far downstream Dp reading will be corrected to account for additional losses.

Upstream Static Pressure

This read-only field displays the upstream static pressure.

Traditional Dp Read

This read-only field displays the traditional Dp value read from the configured input.

Recovery Dp Read

This read-only field displays the recovery Dp value read from the configured input.

Permanent Dp Read

This read-only field displays the permanent Dp value read from the configured input.

Reynolds Number (Re)

This read-only field displays the calculated Reynold number.

Discharge Coefficient (Cd)

This read-only field displays the coefficient of discharge for the traditional meter.

Inferred Traditional Dp

This read-only field displays the sum of the Recovery DP Read and the Permanent Dp Read.

Traditional DP Error %

This read-only field displays the difference [%] between the Traditional Dp Read and the

Inferred Traditional Dp.

Recovery

This read-only field displays the recovery meter coefficient and corrections made to it.

Meter Coefficient

Kr, Kppl

This read-only field displays the meter coefficient Kr calculated (vs Reynolds number) using the method selected on the Advanced tab.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Configuration 29

Field

Description

Meter Coefficient

Kr’, Kppl’

This read-only field displays the meter coefficient Kr corrected for Head Loss (hl).

Meter Coefficient

Kr’Z, Kppl’Z

This read-only field displays the meter coefficient Kr corrected for Head Loss (hl) and

PLR Offset Factor defined on the Configuration tab.

Permanent

This read-only field displays the permanent meter coefficient and corrections made to it

Meter Coefficient

Kr, Kppl

This read-only field displays the meter coefficient Kppl calculated (vs Reynolds number) using the method selected on the

Advanced tab.

Meter Coefficient

Kr’, Kppl’

This read-only field displays the meter coefficient Kppl corrected for Head Loss (hl).

Meter Coefficient

Kr’Z, Kppl’Z

This read-only field displays the meter coefficient Kppl corrected for Head Loss (hl) and PLR Offset Factor defined on the

Configuration tab.

Traditional Mass Flow Rate

This read-only field displays the mass flow rate as calculated from the traditional meter.

Recovery Mass Flow Rate

This read-only field displays the mass flow rate as calculated from the recovery meter.

Permanent Mass Flow Rate

This read-only field displays the mass flow rate [Kg/sec] as calculated from the permanent meter.

Trad/PPL Rate Actual Error (psi)

This read-only field displays the actual error between the traditional and permanent meter flow rates.

Trad/Rec Rate Actual Error (lambda)

This read-only field displays the actual error between the traditional and recovery meter flow rates.

Rec/PPL Rate Actual Error (chi)

This read-only field displays the actual error [%] between the recovery and permanent meter flow rates.

Trad/PPL Rate Aceptable Error (phi)

This read-only field displays the acceptable error between the traditional and permanent meter flow rates.

Trad/Rec Rate Aceptable Error (nu)

This read-only field displays the acceptable error between the traditional and recovery meter flow rates.

Rec/PPL Rate Acceptable Error (xi)

This read-only field displays the acceptable error [%] between the recovery and permanent meter flow rates.

PLR

This read-only field displays the uncorrected and corrected pressure loss ratio information for the traditional to permanent pressure loss ratio.

Actual

This read-only field displays the actual pressure ratio.

Calibration

This read-only field displays the theoretical (uncorrected) pressure ratio.

Calib’

This read-only field displays the theoretical pressure loss ratio corrected for meter coefficient Kr corrected for Head Loss (hl).

Calib’Z

This read-only field displays the theoretical pressure loss ratio corrected for Head Loss (hl) and PLR Offset Factor.

DP – Prognosis FC User Manual (for ROC800-Series)

30 Configuration Issued January-2017

Field

Description

PRR

This read-only field displays the uncorrected and corrected pressure loss ratio information for the traditional to recovery pressure loss ratio.

Actual

This read-only field displays the actual pressure ratio.

Calibration

This read-only field displays the theoretical (uncorrected) pressure ratio.

Calib’

Displays the theoretical pressure loss ratio corrected for meter coefficient Kr corrected for Head Loss (hl).

Calib’Z

Displays the theoretical pressure loss ratio corrected for Head Loss (hl) and PLR Offset

Factor.

RPR

This read-only field displays the uncorrected and corrected pressure loss ratio information for the recovery to permanent pressure loss ratio.

Actual

This read-only field displays the actual pressure ratio.

Calib’Z

This read-only field displays the theoretical pressure loss ratio corrected for Head Loss (hl) and PLR Offset Factor. This will be identical to the Actual value for RPR

PLR Error Difference

This read-only field displays the calculated difference between the actual and the corrected theoretical PLR

PRR Error Difference

This read-only field displays the calculated difference between the actual and the corrected theoretical PRR.

RPR Error Difference

This read-only field displays the calculated difference between the actual and the corrected theoretical RPR.

2. Proceed to Section 3.5 – Detail.

3.5 Detail

The Detail tab provides more detailed information that the summary tab. It also contains a limited amount of diagnostic information:

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Configuration 31

Figure 3-7. Detail tab

1. Review the following fields:

Field

Description

Diagnostic Attempt

Counter

This read-only field displays each time a diagnostic run begins; this counter is increased.

Diagnostic Completion Counter

This read-only field displays each time a diagnostic run reaches successful completion, this counter is incremented. If the Diagnostic

Attempt Counter is increasing faster than the Diagnostic Completion Counter, an error

condition is indicated.

DP – Prognosis FC User Manual (for ROC800-Series)

32 Configuration Issued January-2017

Field

Description

Alarm Byte Value

This read-only field displays the numeric representation of currently-active alarms is displayed in this field. This is a bit-mapped 8-bit integer:  Bit 0 – Traditional to Permanent Mass Flow

Rate Alarm

 Bit 1 – Traditional to Permanent Pressure

Ratio Alarm

 Bit 2 – Traditional to Recovery Mass Flow

Rate Alarm

 Bit 3 – Traditional to Recovery Pressure Ratio

Alarm

 Bit 4 – Recovery to Permanent Mass Flow

Rate Alarm

 Bit 5 – Recovery to Permanent Pressure Ratio

Alarm

 Bit 6 – Dp Comparison Alarm  Bit 7 – Not used

Note: This field is a numeric representation of

the Alarms section displayed on the

Results tab

Pattern Match Code

This read-only field displays the numeric version of the results of pattern matching. See Chapter 4 – Reference of this document for a listing of the coded values.

Raw x1, y1, x2, y2, x3, y3, x4

This read-only field displays the individual diagnostic values from each repetition. All of the unused repetition columns are filled with zeros The Prognosis FC functions can be configured to run from 1 to 9 repetitions of calculations for each commanded execution. The results of this set of runs is averaged.

1 – traditional

This read-only field displays the averaged values of the individual parameters.

Flow Diagnostic

x

This read-only field displays the flow diagnostic (x1) for the traditional meter.

Pressure Ratio

Diagnostic y

This read-only field displays the pressure ratio diagnostic (y1) for the traditional meter.

2 – recovery

This read-only field displays the averaged values of the individual parameters.

Flow Diagnostic

x

This read-only field displays the flow diagnostic (x2) for the recovery meter.

Pressure Ratio

Diagnostic y

This read-only field displays the pressure ratio diagnostic (y2) for the recovery meter.

3 - permanent

This read-only field displays the averaged values of the individual parameters.

Flow Diagnostic

x

This read-only field displays the flow diagnostic (x3) for the permanent meter.

Pressure Ratio

Diagnostic y

This read-only field displays the pressure ratio diagnostic (y3) for the permanent meter.

Dp Comparison

This read-only field displays the averaged value of the DpL-comparison diagnostic.

2. Proceed to Section 3.6 – Saving the Configuration.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Configuration 33

3.6 Saving the Configuration

Whenever you modify or change the configuration, it is a good practice to save the final configuration to memory. To save the configuration:

Select ROC > Flags. The Flags screen displays:

Figure 3-8. Flags

1. Click Save Configuration. A verification message displays:

Figure 3-9. Save Verification

DP – Prognosis FC User Manual (for ROC800-Series)

34 Configuration Issued January-2017

2. Click Yes. When the save process completes, a confirmation

message displays:

Figure 3-10. Confirmation

Note: Depending on the size and complexity of the user program,

this process may take several minutes. When the process ends, the Status field on the Flags screen displays

Completed.

Figure 3-11. Flags, Status - Completed

3. Click Update on the Flags screen. This completes the process of

saving your new configuration.

Note: For archive purposes, you should also save this configuration

to your PC’s hard drive or a removable media (such as a flash drive) using the File > Save Configuration option on the ROCLINK 800 menu bar.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 35

Chapter 4 – Reference

This section provides information on the user-defined point types the DP Meter Diagnostics program uses:

 Point Type 220: DP Meter Diagnostics Parameters

The following topics are discussed in this section:

 Program Status Codes and Messages  Pattern Match Codes and Messages  Zeroing the meter for Prognosis FC

DP – Prognosis FC User Manual (for ROC800-Series)

36 Reference Issued January-2017

4.1 Point Type 220: DP – Prognosis FC Parameters

Point type 220 contains the parameters for the configuration and the output parameters of the DP – Prognosis FC user program. The program supports up to 12 logicals of point type 220.

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

0

Tag

R/W

User

AC

10

0x20  0x7E for

each ASCII

character

“”

1.00

An alternate text descriptor

1

Cd Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating Cd of Cd Method is anything other than “ISO 5167 equation”

2

Cd Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating Cd of Cd Method is anything other than “ISO 5167 equation”

3

Cd Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating Cd of Cd Method is anything other than “ISO 5167 equation”

4

Cd Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating Cd of Cd Method is anything other than “ISO 5167 equation”

5

Kr Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kr Method = “derive Kr from

curve-fit polynomial” then Kr is calculated using a Cd computed = KrA+(KrB*Re)+(KrC*( Re ^2))+(KrD*( Re ^3))

6

Kr Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kr Method = “derive Kr from curve-fit polynomial” then Kr is calculated using a Cd computed = KrA+(KrB*Re)+(KrC*( Re ^2))+(KrD*( Re ^3))

7

Kr Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kr Method = “derive Kr from

curve-fit polynomial” then Kr is calculated using a Cd computed = KrA+(KrB*Re)+(KrC*( Re ^2))+(KrD*( Re ^3))

8

Kr Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kr Method = “derive Kr from

curve-fit polynomial” then Kr is calculated using a Cd computed = KrA+(KrB*Re)+(KrC*( Re ^2))+(KrD*( Re ^3))

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 37

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

9

Kppl Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kppl Method = “derive Kppl

from curve-fit polynomial” then Kppl is calculated using a Cd computed = KpplA+(KpplB*Re)+(KpplC*( Re ^2))+(KpplD*( Re ^3))

10

Kppl Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kppl Method = “derive Kppl

from curve-fit polynomial” then Kppl is calculated using a Cd computed = KpplA+(KpplB*Re)+(KpplC*( Re ^2))+(KpplD*( Re ^3))

11

Kppl Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kppl Method = “derive Kppl

from curve-fit polynomial” then Kppl is calculated using a Cd computed = KpplA+(KpplB*Re)+(KpplC*( Re ^2))+(KpplD*( Re ^3))

12

Kppl Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

If Kppl Method = “derive Kppl

from curve-fit polynomial” then Kppl is calculated using a Cd computed = KpplA+(KpplB*Re)+(KpplC*( Re ^2))+(KpplD*( Re ^3))

13

PLR Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PLR if PLR Method is anything other than “ISO 5167 equation”

14

PLR Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PLR if PLR Method is anything other than “ISO 5167 equation”

15

PLR Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PLR if PLR Method is anything other than “ISO 5167 equation”

16

PLR Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PLR if PLR Method is anything other than “ISO 5167 equation”

17

PRR Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PRR if PRR Method is anything other than “calculate from PLR and theoretical relationships”

DP – Prognosis FC User Manual (for ROC800-Series)

38 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

18

PRR Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PRR if PRR Method is anything other than “calculate from PLR and theoretical relationships”

19

PRR Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PRR if PRR Method is anything other than “calculate from PLR and theoretical relationships”

20

PRR Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating PRR if PRR Method is anything other than “calculate from PLR and theoretical relationships”

21

RPR Polynomial A

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating RPR if RPR Method is anything other than “calculate from PLR and theoretical relationships”

22

RPR Polynomial B

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating RPR if RPR Method is anything other than “calculate from PLR and theoretical relationships”

23

RPR Polynomial C

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating RPR if RPR Method is anything other than “calculate from PLR and theoretical relationships”

24

RPR Polynomial D

R/W

User

FL

4

Any IEEE floating

point value

0.0

1.00

Coefficient used for calculating RPR if RPR Method is anything other than “calculate from PLR and theoretical relationships”

25

PPL Tap Distance

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Distance between the restriction (orifice plate) and the PPL pressure tap. Units of measure are same as used for orifice and pipe diameter.

26

Obstruction Minor Loss Coefficient

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Sum of minor loss coefficients for any obstructions between the flow restriction (orifice plate) and the PPL pressure tap

27

Friction Factor

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.012

1.00

Friction factor for calculating pressure loss in the meter body

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 39

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

28

PLR Offset Factor

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Factor for offsetting the PLR of the meter

29

Acceptable Variance of Cd

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

1.0

1.00

Maximum acceptable variance percentage of discharge coefficient

30

Acceptable Variance of Kr

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

2.0

1.00

Maximum acceptable variance percentage of recovery meter coefficient

31

Acceptable Variance of Kppl

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

3.0

1.00

Maximum acceptable variance percentage of permanent pressure loss meter coefficient

32

Acceptable Variance of PLR

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

2.6

1.00

Maximum acceptable variance permanent pressure loss ratio

33

Acceptable Variance of PRR

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

2.2

1.00

Maximum acceptable variance recovery pressure loss ratio

34

Acceptable Variance of RPR

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

2.8

1.00

Maximum acceptable variance of ratio of pressure recovery pressure to permanent pressure loss

35

Acceptable Variance of Traditional Dp

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

1.0

1.00

Maximum acceptable variance of the measured traditional Dp from the inferred traditional Dp

36

Cd Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Cd polynomial coefficient A

37

Cd Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Cd polynomial coefficient B

38

Cd Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Cd polynomial coefficient C

39

Cd Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Cd polynomial coefficient D

40

Kr Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kr polynomial coefficient A

DP – Prognosis FC User Manual (for ROC800-Series)

40 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

41

Kr Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kr polynomial coefficient B

42

Kr Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kr polynomial coefficient C

43

Kr Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kr polynomial coefficient D

44

Kppl Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kppl polynomial coefficient A

45

Kppl Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kppl polynomial coefficient B

46

Kppl Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kppl polynomial coefficient C

47

Kppl Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the Kppl polynomial coefficient D

48

PLR Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PLR polynomial coefficient A

49

PLR Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PLR polynomial coefficient B

50

PLR Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PLR polynomial coefficient C

51

PLR Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PLR polynomial coefficient D

52

PRR Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PRR polynomial coefficient A

53

PRR Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PRR polynomial coefficient B

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 41

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

54

PRR Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PRR polynomial coefficient C

55

PRR Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the PRR polynomial coefficient D

56

RPR Text Polynomial A

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the RPR polynomial coefficient A

57

RPR Text Polynomial B

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the RPR polynomial coefficient B

58

RPR Text Polynomial C

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the RPR polynomial coefficient C

59

RPR Text Polynomial D

RW

User

AC

20

Any valid

numerical ASCII

characters

“0.0”

1.00

Text version of the RPR polynomial coefficient D

60

Recovery Low DP Setpoint

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

If Regular Dp source is being used and Dp falls below this setpoint value, the system will switch to using the Low DP source.

61

Recovery High Dp Setpoint

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

If low DP source is being used and Dp rises above this value, the system will switch to use the Regular Dp source

62

Permanent Low DP Setpoint

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

If Regular Dp source is being used and Dp falls below this setpoint value, the system will switch to using the Low DP source.

63

Permanent High Dp Setpoint

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

If low DP source is being used and Dp rises above this value, the system will switch to use the Regular Dp source

64

Recovery Dp Source

R/W

User

TLP 3 Any valid TLP

(assumed to be a

floating point TLP)

0,0,0

1.00

Source of differential pressure signal measured from downstream tap to PPL tap.

DP – Prognosis FC User Manual (for ROC800-Series)

42 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

65

Recovery Low Dp Source

R/W

User

TLP 3 Any valid TLP

(assumed to be a

floating point TLP)

0,0,0

1.00

Source of differential pressure signal measured from downstream tap to PPL tap to

be used for “low” side of a

stacked DP arrangement.

66

Permanent Dp Source

R/W

User

TLP 3 Any valid TLP

(assumed to be a

floating point TLP)

0,0,0

1.00

Source of differential pressure signal measured from upstream tap to PPL tap.

67

Permanent Low Dp Source

R/W

User

TLP 3 Any valid TLP

(assumed to be a

floating point TLP)

0,0,0

1.00

Source of differential pressure signal measured from upstream tap to PPL tap to be used for

“low” side of a stacked DP

arrangement.

68

Enable DPMD

R/W

User

UINT8 1 0-1

0

1.00

Valid values are: 0 = Disable DPMD for this

meter

1 = Enable DPMD for this meter

69

Meter Type

R/W

User

UINT8 1 0-2

0

1.00

Valid values are:

0 = Orifice 1 = Venturi 2 = Cone

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 43

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

70

PLR Method

R/W

User

UINT8 1 0-8

1

1.00

Valid values are:

0 – Use ISO 5167-2 equation 7

for all Beta ratios

1 – Use f(Beta) equation

disclosed by Stevens in 2012 for Beta ratios above

0.55

2 – Direct polynomial curve-fit

PLR = A + B*Re + C*Re^2 + D*Re^3

3 – Direct curve fit PLR = A +

B*(e^(C*Re))

4 – Direct curve fit PLR = A +

B*(10^(C*Re))

5 – Direct curve fit PLR = A +

B*ln((C*Re))

6 – Direct curve fit PLR = A +

B*log((C*Re))

7 – Direct curve fit PLR = A +

B*(C^(D*Re))

8 – Direct curve fit PLR = A + B

*((C*Re)^D)

Note: Methods 0 and 1 are only

valid for an Orifice Meter.

71

Generate Events

R/W

User

UINT8 1 0-1

1

1.00

Valid values are: 0 – Generate events in the

event log when meter diagnostic configuration parameters are modified

1 – Do not generate events

72

Generate Alarms

R/W

User

UINT8 1 0-3

3

1.00

Valid values are:

0 – Do not generate alarms 1 – Generate only a single,

combined alarm for all diagnostics

2 – Generate alarms based on

the seven individual diagnostics

3 – Generate alarm based upon

pattern matching

DP – Prognosis FC User Manual (for ROC800-Series)

44 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

73

Kr Method

R/W

User

UINT8 1 0-8

0

1.00

Valid values are: 0 – Derive Kr using Cd derived

ISO 5167 equation 4

1 – Derive Kr using Cd from

polynomial curve-fit Cd = A + B*Re + C*Re^2 + D*Re^3

2 – Direct polynomial curve-fit

Kr = A + B*Re + C*Re^2 + D*Re^3

3 – Direct curve fit Kr = A +

B*(e^(C*Re))

4 – Direct curve fit Kr = A +

B*(10^(C*Re))

5 – Direct curve fit Kr = A +

B*ln((C*Re))

6 – Direct curve fit Kr = A +

B*log((C*Re))

7 – Direct curve fit Kr = A +

B*(C^(D*Re))

8 – Direct curve fit Kr = A + B

*((C*Re)^D)

Note: Methods 0 and 1 are only

valid for an Orifice Meter.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 45

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

74

Kppl Method

R/W

User

UINT8 1 0-8

0

1.00

Valid values are: 0 – Derive Kppl using Cd

derived ISO 5167 equation 4

1 – Derive Kppl using Cd from

polynomial curve-fit Cd = A + B*Re + C*Re^2 + D*Re^3

2 – Direct polynomial curve-fit

Kppl = A + B*Re + C*Re^2 + D*Re^3

3 – Direct curve fit Kppl = A +

B*(e^(C*Re))

4 – Direct curve fit Kppl = A +

B*(10^(C*Re))

5 – Direct curve fit Kppl = A +

B*ln((C*Re))

6 – Direct curve fit Kppl = A +

B*log((C*Re))

7 – Direct curve fit Kppl = A +

B*(C^(D*Re))

8 – Direct curve fit Kppl = A + B

*((C*Re)^D)

Note: Methods 0 and 1 are only

valid for an Orifice Meter.

75

Run Command

R/W

User

UINT8 1 0-1

0

1.00

Set this parameter to 1 to initiate a diagnostic. The system will set the value to zero at the end of the diagnostic.

DP – Prognosis FC User Manual (for ROC800-Series)

46 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

76

Scheduling Enabled

R/W

User

UINT8 1 0-4

0

1.00

Valid values are: 0 = Scheduling of diagnostic is

disabled

1 = The program will schedule a

diagnostic using the specified number as an interval in minutes.

2 = The program will schedule a

diagnostic using the specified number as an interval in hours.

3 = The program will schedule a

diagnostic using the specified number as an interval in days.

4 = The program will schedule a

diagnostic using the specified number as an interval in seconds.

77

Schedule Interval

R/W

User

UINT8 1 1-255

1

1.00

Interval to use in scheduling

diagnostics (see “Enable

Scheduling”)

78

Number to Average

R/W

User

UINT8 1 1-9

4

1.00

Number of consecutive diagnostics to run and average for result values

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 47

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

79

Cd Method

R/W

User

U8 1 0-7

1

1.00

Method for calculating Cd:

0 – ISO 5167 equation 1 – Direct polynomial curve-fit

Cd = A + B*Re + C*Re^2 + D*Re^3

2 – Direct curve fit Cd = A +

B*(e^(C*Re))

3 – Direct curve fit Cd = A +

B*(10^(C*Re))

4 – Direct curve fit Cd = A +

B*ln((C*Re))

5 – Direct curve fit Cd = A +

B*log((C*Re))

6 – Direct curve fit Cd = A +

B*(C^(D*Re))

7 – Direct curve fit Cd = A + B

*((C*Re)^D)

Note: Method 0 is only valid for

an Orifice Meter.

80

PRR Method

R/W

User

UINT8 1 0-7

1

1.00

Valid values are: 0 – Calculate from PLR and

theoretical relationships

1 – Direct polynomial curve-fit

PRR = A + B*Re + C*Re^2 + D*Re^3

2 – Direct curve fit PRR = A +

B*(e^(C*Re))

3 – Direct curve fit PRR = A +

B*(10^(C*Re))

4 – Direct curve fit PRR = A +

B*ln((C*Re)) 5 – Direct curve fit PRR = A + B*log((C*Re)) 6 – direct curve fit PRR = A + B*(C^(D*Re)) 7 – direct curve fit PRR = A + B *((C*Re)^D)

DP – Prognosis FC User Manual (for ROC800-Series)

48 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

81

RPR Method

R/W

User

UINT8 1 0-7

1

1.00

Valid values are:

0 – Calculate from PLR and

theoretical relationships 1 – Direct polynomial curve-fit

RPR = A + B*Re + C*Re^2 +

D*Re^3 2 – Direct curve fit RPR = A +

B*(e^(C*Re)) 3 – Direct curve fit RPR = A +

B*(10^(C*Re)) 4 – Direct curve fit RPR = A +

B*ln((C*Re)) 5 – Direct curve fit RPR = A +

B*log((C*Re)) 6 – Direct curve fit RPR = A +

B*(C^(D*Re)) 7 – Direct curve fit RPR = A + B

*((C*Re)^D)

82

Pattern Alarm Text

RO

System

AC

30

0x20  0x7E for

each ASCII

character

“No Pattern

Match”

1.00

Text description related to the pattern match

83

Program Status Description

RO

System

AC

20

0x20  0x7E for

each ASCII

character

“”

1.00

Text Description of the Program’s status

84

Last Diagnostic Completed Datetime Text

RO

System

AC

20

0x20  0x7E for

each ASCII

character

“”

1.00

Text representation of the last diagnostic completion timestamp. Format is MM/DD/YYYY HH:NN:SS.

85

Traditional to PPL Rate Error Percent Limit (phi)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value used to Normalize output data.

86

Traditional to Recovery Rate Error Percent Limit (nu)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value used to Normalize output data.

87

Recovery to PPL Rate Error Percent Limit (xi)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value used to Normalize output data.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 49

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

88

Traditional to PPL Mass Flow Difference Percent (psi)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value expressing difference between mass flow rates of the two meters in percent

89

Traditional to Recovery Mass Flow Difference Percent (lambda)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value expressing difference between mass flow rates of the two meters in percent

90

Recovery to PPL Mass Flow Difference Percent (chi)

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Intermediate value expressing difference between mass flow rates of the two meters in percent

91

Upstream Static Pressure

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Upstream pressure from the meter (ex: 114, #, 17) in absolute pressure but converted to Pa as necessary

92

Isentropic Exponent

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Also known as ratio of specific heats. Copied from (113, #,19)

93

Temperature Corrected Beta Ratio

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Ratio of restriction diameter to meter body diameter. Uses temperature corrected values. Copied from (114, #, 14)

94

Temperature Corrected Restriction Diameter

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Temperature corrected restriction (orifice bore) diameter (114, #, 8) converted to meters

95

Temperature Corrected Inlet Diameter

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Temperature corrected meter body diameter (114, #, 13) converted to meters

96

Inlet Density

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Flowing gas density at inlet conditions converted to Kg/M3as necessary

97

Viscosity

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Flowing gas (dynamic) viscosity converted to Pa-sec as necessary

98

Meter Inlet Area

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Temperature corrected crosssectional area of the meter inlet in M2

DP – Prognosis FC User Manual (for ROC800-Series)

50 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

99

Velocity of Approach Factor

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Copied from (114, #, 6)

100

Meter Throat Area

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Temperature corrected crosssectional area of the meter restriction in M2

101

Extra L over D

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Measure of non-standard distance between 6D and actual location of the PPL tap

102

Traditional Dp Read

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Copy of (113, #, 26) converted to Pa

103

Recovery Dp Read

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Value gained from the Recovery Dp Source TLP and converted to Pa. The conversion assumes that the Recovery Dp value is in the same units of measure as the Traditional Dp.

104

Permanent Dp Read

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Value gained from the Permanent Dp Source TLP and converted to Pa. The conversion assumes that the Permanent Dp value is in the same units of measure as the Traditional Dp.

105

Traditional Mass Flow Rate

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Mass flow rate calculated using the traditional meter [Kg/sec]

106

Recovery Mass Flow Rate

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Mass flow rate calculated using the recovery meter [Kg/sec]

107

PPL Mass Flow Rate

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Mass flow rate calculated using the permanent pressure loss meter [Kg/sec]

108

Actual PLR

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Ratio of measured Permanent Pressure Loss Dp to measured Traditional Dp

109

Actual PRR

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Ratio of measured Recovery Dp to measured Traditional Dp

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 51

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

110

Actual RPR

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Ratio of measured recovery Dp to permanent pressure loss Dp

111

Calibration PLR

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

PLR as defined by either theoretical or calibration source. Source depends upon meter type and other options.

112

Calibration PRR

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

PRR as defined by either theoretical or calibration source. Source depends upon meter type and other options.

113

Calibration PLR Prime

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Calibration PLR corrected for non-standard pressure losses upstream of the PPL tap

114

Calibration PRR Prime

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Calibration PRR corrected for non-standard pressure losses upstream of the PPL tap

115

Calibration PLR Prime Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Calibration PLR Prime corrected for a fixed meter bias. This is the final theoretical PLR – including all corrections.

116

Calibration PRR Prime Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Calibration PRR Prime corrected for a fixed meter bias. This is the final theoretical PRR – including all corrections.

117

Calibration RPR Prime Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

RPR calculated from Calibration PLR PrimeZ and Calibration PRR PrimeZ. This is the final theoretical PRR – including all corrections.

118

K Loss

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Loss Coefficient including obstructions and extra distance (beyond 6D) of PPL tap downstream

119

Head Loss

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Head loss associated with K Loss [meter]

120

Inferred Traditional Dp

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Traditional Dp derived from recovery DP and PPL Dp. This value is only calculated if all three Dp’s are measured.

DP – Prognosis FC User Manual (for ROC800-Series)

52 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

121

Traditional Dp Error Percent

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Percent difference between inferred traditional DP and measured traditional Dp

122

Traditional Expansion Factor

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Expansion factor calculated for the traditional meter

123

Reynolds Number

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Reynolds number calculated at inlet conditions

124

Discharge Coefficient Cd

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Discharge Coefficient for the traditional meter calculated using ISO 5167-2 equation 4

125

Recovery Meter Coefficient Kr

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Meter coefficient for the recover meter

126

Recovery Meter Coefficient Kr Prime

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Recovery meter coefficient Kr corrected for non-standard pressure losses upstream of the PPL tap

127

Recovery Meter Coefficient Kr Prime Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Recovery meter coefficient Kr Prime corrected for a fixed meter bias. This is the final Kr – including all corrections.

126

PPL Meter Coefficient Kppl

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Meter Coefficient for the PPL meter

129

PPL Meter Coefficient Kppl Prime

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

PPL meter coefficient Kppl corrected for non-standard pressure losses upstream of the PPL tap

130

PPL Meter Coefficient Kppl Prime Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

PPL meter coefficient Kpplprime corrected for a fixed meter bias. This is the final Kr – including all corrections.

131

Diagnostic x1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, horizontal error of diagnostic point 1

132

Diagnostic y1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, vertical error of diagnostic point 1

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 53

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

133

Diagnostic x2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, horizontal error of diagnostic point 2

134

Diagnostic y2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, vertical error of diagnostic point 2

135

Diagnostic x3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, horizontal error of diagnostic point 3

136

Diagnostic y3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, vertical error of diagnostic point 3

137

Diagnostic x4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Normalized, horizontal error of diagnostic point 4

138

Raw x1 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the first averaging iteration

139

Raw x1 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 2nd averaging iteration

140

Raw x1 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 3rd averaging iteration

141

Raw x1 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 4th averaging iteration

142

Raw x1 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 5th averaging iteration

143

Raw x1 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 6th averaging iteration

144

Raw x1 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 7th averaging iteration

145

Raw x1 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 8th averaging iteration

DP – Prognosis FC User Manual (for ROC800-Series)

54 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

146

Raw x1 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x1 from the 9th averaging iteration

147

Raw x2 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the first averaging iteration

148

Raw x2 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 2nd averaging iteration

149

Raw x2 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 3rd averaging iteration

150

Raw x2 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 4th averaging iteration

151

Raw x2 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 5th averaging iteration

152

Raw x2 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 6th averaging iteration

153

Raw x2 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 7th averaging iteration

154

Raw x2 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 8th averaging iteration

155

Raw x2 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x2 from the 9th averaging iteration

156

Raw x3 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3from the first averaging iteration

157

Raw x3 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 2nd averaging iteration

158

Raw x3 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 3rd averaging iteration

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 55

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

159

Raw x3 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 4th averaging iteration

160

Raw x3 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 5th averaging iteration

161

Raw x3 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 6th averaging iteration

162

Raw x3 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 7th averaging iteration

163

Raw x3 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 8th averaging iteration

164

Raw x3 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x3 from the 9th averaging iteration

165

Raw x4 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the first averaging iteration

166

Raw x4 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 2nd averaging iteration

167

Raw x4 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 3rd averaging iteration

168

Raw x4 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 4th averaging iteration

169

Raw x4 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 5th averaging iteration

170

Raw x4 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 6th averaging iteration

171

Raw x4 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 7th averaging iteration

DP – Prognosis FC User Manual (for ROC800-Series)

56 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

172

Raw x4 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 8th averaging iteration

173

Raw x4 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

x4 from the 9th averaging iteration

174

Raw y1 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the first averaging iteration

175

Raw y1 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 2nd averaging iteration

176

Raw y1 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 3rd averaging iteration

177

Raw y1 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 4th averaging iteration

178

Raw y1 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 5th averaging iteration

179

Raw y1 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 6th averaging iteration

180

Raw y1 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 7th averaging iteration

181

Raw y1 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 8th averaging iteration

182

Raw y1 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y1 from the 9th averaging iteration

183

Raw y2 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the first averaging iteration

184

Raw y2 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 2nd averaging iteration

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 57

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

185

Raw y2 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 3rd averaging iteration

186

Raw y2 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 4th averaging iteration

187

Raw y2 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 5th averaging iteration

188

Raw y2 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 6th averaging iteration

189

Raw y2 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 7th averaging iteration

190

Raw y2 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 8th averaging iteration

191

Raw y2 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y2 from the 9th averaging iteration

192

Raw y3 1

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the first averaging iteration

193

Raw y3 2

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 2nd averaging iteration

194

Raw y3 3

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 3rd averaging iteration

195

Raw y3 4

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 4th averaging iteration

196

Raw y3 5

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 5th averaging iteration

197

Raw y3 6

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 6th averaging iteration

DP – Prognosis FC User Manual (for ROC800-Series)

58 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

198

Raw y3 7

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 7th averaging iteration

199

Raw y3 8

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 8th averaging iteration

200

Raw y3 9

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

y3 from the 9th averaging iteration

201

Traditional to PPL Pressure Difference

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Error in PPL expressed in percent

202

Traditional to Recovery Pressure Difference

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Error in PRR expressed in percent

203

Recovery to PPL Pressure Difference

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Error in RPR expressed in recovery percent

204

Diagnostic Attempt Counter

RO

System

U32

4

0 to 4294967295

0

1.00

Number of times a diagnostic has been attempted

205

Diagnostic Completion Counter

RO

System

U32

4

0 to 4294967295

0

1.00

Number of times a diagnostic has completed successfully

206

Last Diagnostic Completion Timestamp

RO

System

U32

4

0 to 4294967295

0

1.00

Date/time of the last completed diagnostic [number of seconds since 01/01/1970]

207

Seconds Until Next Scheduled Diagnostic Run

RO

System

U32

4

0-4294967295

0

1.00

Countdown timer for scheduled execution of diagnostics

208

Program Status Code

RO

System

U16 2 0-65535

0.0

1.00

Numeric code indicating status of the program

209

Tap Type

RO

System

U8 1 0,1,2,10

0

1.00

Copy of (46,#,88). Valid values are:

0 = Orifice with flange taps 1 = Orifice with corner taps 2 = Orifice with D – D/2 taps 10 = Venturi

210

Average Count

RO

System

U8 1 0-9

0

1.00

Counter used for averaging of x and y output values

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 59

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

211

Alarm Byte

RO

System

U8 1 0 to 127

0

1.00

Packed representation of the alarm status of the four diagnostic points.

bit0 indicates x1 Alarm bit1 indicates y1 Alarm bit2 indicates x2 Alarm bit3 indicates y2 Alarm bit4 indicates x3 Alarm bit5 indicates y3 Alarm bit6 indicates x4 Alarm bit7 is always 0 If the indicated diagnostic is

greater than 1.0, the associated bit will be of value 1, otherwise, the bit will be zero.

Example: Y1, X2, and x4 are greater than

1.0 but all others are less than

1.0 Value = binary 01000110 or

decimal 70

212

Pattern Alarm Code

RO

User

UINT8 1 0-25, 255

255

1.00

A code indicating which pattern was matched to the diagnostic results

213

x1 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the x1 diagnostic

214

x2 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the x2 diagnostic

215

x3 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the x3 diagnostic

216

x4 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the x4 diagnostic

217

y1 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the y1 diagnostic

218

y2 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the y2 diagnostic

219

y3 Exception Byte

RO

System

UINT8 1 0,1

0

1.00

A value of 1 indicates an exception for the y3 diagnostic

DP – Prognosis FC User Manual (for ROC800-Series)

60 Reference Issued January-2017

Point Type 220: DPMD Configuration Parameters

Parm

#

Name

Access

System or User

Update

Data

Type

Length

Range

Default

Version

Description of functionality

and meaning of values

220

L over D

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Actual distance to PPL tap made dimensionless by dividing it by the meter inlet diameter

221

Suggested Z

RO

System

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

1.00

Value of PLR offset (Z) which

will “zero” the meter for

Prognosis FC

222

Meter UOM System

RO

System

UINT8 1 0,1,2

0

1.00

Copy of the units of measure system for the station (in ROC800 gas meter station structure) associated with the meter. Valid values are:

0 = U.S. units 1 = KPa 2 = Bar

223

Low Traditional DP Cutoff

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

0.00

If the traditional DP [in Pa] is below this value, DP diagnostic calculations will be suspended

224

Low Recovery DP Cutoff

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

0.00

If the recovery DP [in Pa] is below this value, DP diagnostic calculations will be suspended

225

Low Permanent DP Cutoff

R/W

User

FL

4

Any positive, non-

zero IEEE floating

point value

0.0

0.00

If the permanent DP [in Pa] is below this value, DP diagnostic calculations will be suspended

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 61

4.2 Program Status Codes and Messages

The following table describes program status codes and messages.

Code

Message

Suggested Corrective Action

0

OK

None required

1

SQRTof Neg, Rec Flow

Check recovery DP input

2

SQRTof Neg, PPL Flow

Check permanent DP input

3

Unsupported Mtr Type

Meter type must be orifice, Venturi, or cone

4

Allow Err Pct 0 PPL

Check allowable error percentages – they must be greater than zero

5

Flow Zero Traditnl

Check traditional DP input and meter configuration in the ROC meter

6

Allow Err Pct 0 REC

Check allowable error percentages – they must be greater than zero

7

Allow Err Pct 0 PPL3

Check allowable error percentages – they must be greater than zero

8

Flow Zero PPL

Check permanent DP input

9

Trad Dp Zero

Check traditional DP input

10

PPL Dp Zero,Y1

Check permanent DP input

11

Meter Area Error

Check meter size configuration in ROC meter

12

Trad Dp Zero,Ratios

Check traditional and permanent DP inputs

13

PlrCalprimeZ zero

Check PLR calculation method (advanced configuration)

14

PrrCalPrimeZ zero

Check PRR calculation method (advanced configuration)

15

RprcalPrimeZ zero

Check RPR calculation method (advanced configuration)

16

Max Accept a zero

Check allowable error percentages – they must be greater than zero

17

Max Accept b zero

Check allowable error percentages – they must be greater than zero

18

Max Accept c zero

Check allowable error percentages – they must be greater than zero

19

Tradnl Dp Source Err

Check meter DP input configuration in ROC meter

20

Must have two DPs

Check configuration of recovery and permanent DP inputs

21

No License

Obtain and install a license key for the softwarer

22

Kr Polynoml Coef Err

Check curve fit coefficients for Kr method (advanced configuration)

23

Kppl Polynml Coef Er

Check curve fit coefficients for Kppl method (advanced configuration)

24

Cd Polynoml Coef Err

Check curve fit coefficients for Cd method (advanced configuration)

25

Invalid Cd Method

Check Cd Method (advanced configuration)

26

Invalid Kr Method

Check Kr Method (advanced configuration)

27

Invalid Kppl Method

Check Kppl Method (advanced configuration)

DP – Prognosis FC User Manual (for ROC800-Series)

62 Reference Issued January-2017

Code

Message

Suggested Corrective Action

28

Invalid PLR Method

Check PLR Method (advanced configuration)

29

PLR Polynoml Coef Er

Check curve fit coefficients for PLR method (advanced configuration)

30

PRR Polynoml Coef Er

Check curve fit coefficients for PRR method (advanced configuration)

31

RPR Polynoml Coef Er

Check curve fit coefficients for RPR method (advanced configuration)

32

Ival PRatio Mtd Comb

Check Cd, Kr, Kppl, PLR, PRR, and RPR methods

33

DP too low for a run

Wait until flow through the meter increases or decrease meter restriction size to increase Dp values

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 63

4.3 Pattern Match Codes and Messages

The following table describes pattern match codes and messages.

Code

Message

Description

0

Within Acceptable Limits

Meter is performing correctly

1

Traditional DP is reading high

Error in the traditional DP reading. Sensor calibration, manifold valve, impulse line

2

Traditional DP is reading low

Error in the traditional DP reading. Sensor calibration, manifold valve, impulse line

3

PPL DP is reading high

Error in the permanent DP reading. Sensor calibration, manifold valve, impulse line

4

PPL DP is reading low

Error in the permanent DP reading. Sensor calibration, manifold valve, impulse line

5

One or more DP is in Error

Comparison of the three measured DPs is out of acceptable range

6

Recovery DP is reading low

Error in the recovery DP reading. Sensor calibration, manifold valve, impulse line

7

Recovery DP is reading high

Error in the recovery DP reading. Sensor calibration, manifold valve, impulse line

8

Condition 8

One or more of the following might be the cause:

 Disturbed Flow, may be over-reading or under-reading  Unseated orifice meter (dual chamber, plate not fully wound down, leak under plate), under-reading or, any of

the below that all cause an over-reading

 Partial blockage of orifice (relatively steady pattern for relatively steady flow, if blockage does not move)  Inlet diameter entered too small (relatively steady pattern for relatively steady flow)  Orifice diameter entered too large (relatively steady pattern for relatively steady flow)  Wet gas flow (highly unstable DPs and associated diagnostic points)

9

Condition 9

One or more of the following might be the cause: Disturbed Flow, may be over-reading or under-reading or, any of the below that all cause an under-reading:

 Inlet diameter entered too large (relatively steady pattern for relatively steady flow)  Orifice diameter entered too small (relatively steady pattern for relatively steady flow)  Contamination (relatively steady pattern in the short term for relatively steady flow – can change over time as

contamination increases or decreases)

 Buckled plate (relatively steady pattern for relatively steady flow)  Worn edge plate (relatively steady pattern in the short term for relatively steady flow– change over time as

wear increases)  Backwards plate (steady pattern for relatively steady flow – extreme coordinates, points well outside box, more

extreme than worn edge).

DP – Prognosis FC User Manual (for ROC800-Series)

64 Reference Issued January-2017

Code

Message

Description

10

Condition 10

One or more of the following might be the cause:

 the entered inlet diameter is too large  the entered cone diameter is too small  the entered kppl is too small

11

Condition 11

One or more of the following might be the cause:

 the entered inlet diameter is too small  the entered cone diameter is too large  the entered kppl is too high

12

Entry Cd Too High

Meter restriction size is incorrectly configured in the flow computer or Curve fit calculation for Cd is producing invalid values. Check coefficients.

13

Entry Cd Too Low

Meter restriction size is incorrectly configured in the flow computer or Curve fit calculation for Cd is producing invalid values. Check coefficients.

14

Entry Kr Too High

Curve fit calculation for Kr is producing invalid values. Check coefficients.

15

Entry Kr Too Low

Curve fit calculation for Kr is producing invalid values. Check coefficients.

16

Entry PLR Too Low

Curve fit calculation for PLR is producing invalid values. Check coefficients.

17

Entry PLR Too High

Curve fit calculation for PLR is producing invalid values. Check coefficients.

18

Entry PRR Too Low

Curve fit calculation for PRR is producing invalid values. Check coefficients.

19

Entry PRR Too High

Curve fit calculation for PRR is producing invalid values. Check coefficients.

20

Entry RPR Too Low

Curve fit calculation for RPR is producing invalid values. Check coefficients.

21

Entry RPR Too High

Curve fit calculation for RPR is producing invalid values. Check coefficients.

22

Condition 22

One or more of the following might be the cause:

 wet gas  obstructed cone  damaged cone

23

Condition 23

One or more of the following might be the cause:

 the entered inlet diameter is too small  the entered throat diameter is too large  the entered kppl is too small

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 65

Code

Message

Description

24

Condition 24

One or more of the following might be the cause:

 the entered inlet diameter is too large  the entered throat diameter is too small  the entered kppl is too large

25

Possible Wet Gas

Wet gas induces “noise” in Prognosis FC signals. If the “number to average” parameter is configured high enough, this “noise” will be reduced by the averaging process. The values from the individual “runs” can be

viewed via the values displayed on the “detail” tab (parameters 138 through 173) and the degree of variation can

be observed.

DP – Prognosis FC User Manual (for ROC800-Series)

66 Reference Issued January-2017

4.4 Zeroing the meter for Prognosis FC

Certain characteristics of the meter run configuration and the gas can cause the pressure loss ratio of a DP meter to shift. Among these conditions are:

 Far downstream (permanent) pressure tap is more than the idea distance downstream  A thermowell or other obstruction is installed upstream of the far downstream (permanent) pressure tap  Wet gas

One way to account for the tap location and/or obstruction is to use knowledge of the meter configuration along with the configuration parameters provided.

DP – Prognosis FC User Manual (for ROC800-Series)

Issued January-2017 Reference 67

Another option is to “zero the meter”. This is done as follows:

 Insure (via inspection and calibration) that the meter is performing to specification  Observe the Suggested PLR Offset Factor value displayed in the DP Diagnostic Program’s Configuration tab  Enter the suggested value into the PLR Offset Factor parameter on the DP Diagnostic Program’s Configuration tab  Apply changes

DP – Prognosis FC User Manual (for ROC800-Series)

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Remote Automation Solutions

Remote Automation Solutions DP-Prognosis FC (ROC800) Manuals & Guides

Specifications and Main Features

Frequently Asked Questions

User Manual

Revision Tracking Sheet

Contents

Chapter 1 – Introduction

1.1 Scope and Organization

1.2 Product Overview

1.2.1 Theory of Operation

1.2.2 Practical Application

1.2.3 Operational Benefits

1.3 Program Features

1.3.1 DP – Prognosis FC for up to 12 Meter runs

1.3.2 Three Supported Meter Types

1.3.3 Customary Seven Diagnostics

1.3.4 Support for Stacked DPs

1.3.5 Supports two or three measured DPs

1.3.6 Adjustable Diagnostic Frequency

1.3.7 Multi-pass Averaging

1.3.8 Pattern Matching

1.4 Program Requirements

1.4.1 License Key

Chapter 2 – Installation

2.1 Installing the License Key

2.1.1 Verifying the License Key Installation

2.2 Downloading the Program

2.3 MPU Loading Threshold

Chapter 3 – Configuration

3.1 Results

3.2 Configuration

3.3 Advanced

3.4 Intermediate

3.5 Detail

3.6 Saving the Configuration

Chapter 4 – Reference

4.1 Point Type 220: DP – Prognosis FC Parameters

4.2 Program Status Codes and Messages

4.3 Pattern Match Codes and Messages

4.4 Zeroing the meter for Prognosis FC