Baker Hughes DigitalFlow XGF868i Owner's manual

DigitalFlow™ XGF868i
Panametrics flare gas
flow transmitter
Programming manual

ii

DigitalFlow™ XGF868i
Panametrics flare gas flow transmitter
Programming manual
910-198P Rev. C
February 2015
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Information paragraphs
Note: These paragraphs provide information that provides a
deeper understanding of the situation, but is not essential to
the proper completion of the instructions.
IMPORTANT:
These paragraphs provide information emphasizing
instructions which are essential to proper setup of the
equipment. Failure to follow these instructions carefully
may cause unreliable performance.
WARNING!
Indicates a potentially hazardous situation
which can result in serious personal injury or
death, if it is not avoided.
CAUTION!
Indicates a potentially hazardous situation
which can result in minor or moderate injury
to personnel or damage to the equipment, if
it is not avoided.
HIGH VOLTAGE!
This symbol indicates the presence of high
voltage. It calls your attention to situations or
operations that could be dangerous to you
and other persons operating the equipment.
Read these messages and follow the
instructions carefully.
Safety issues
WARNING!
It is the responsibility of the user to make sure
all local, county, state and national codes,
regulations, rules and laws related to safety
and safe operating conditions are met for
each installation.
Auxiliary equipment
Local safety standards
WARNING!
Auxiliary equipment may have both manual
and automatic modes of operation. As
equipment can move suddenly and without
warning, do not enter the work cell of this
equipment during automatic operation,
and do not enter the work envelope of this
equipment during manual operation. If you
do, serious injury can result.
Working Area
WARNING!
Make sure that power to the auxiliary
equipment is turned OFF and locked out
before you perform maintenance procedures
on the equipment.
Qualification of personnel
Make sure that all personnel have manufacturer-approved
training applicable to the auxiliary equipment.
Personal safety equipment
Make sure that operators and maintenance personnel have
all safety equipment applicable to the auxiliary equipment.
Examples include safety glasses, protective headgear,
safety shoes, etc.
Unauthorized operation
Make sure that unauthorized personnel cannot gain access
to the operation of the equipment.
v

Environmental compliance
Waste Electrical and Electronic Equipment (WEEE) directive
Panametrics is an active participant in Europe’s Waste
Electrical and Electronic Equipment (WEEE) take-back
initiative, directive 2012/19/EU.
The equipment that you bought has required the extraction
and use of natural resources for its production. It may
contain hazardous substances that could impact health
and the environment.
In order to avoid the dissemination of those substances in
our environment and to diminish the pressure on the natural
resources, we encourage you to use the appropriate take-
back systems. Those systems will reuse or recycle most of
the materials of your end life equipment in a sound way.
The crossed-out wheeled bin symbol invites you to use
those systems.
If you need more information on the collection, reuse and
recycling systems, please contact your local or regional
waste administration.
Visit https://www.bakerhughesds.com/health-safety-and-
environment-hse for take-back instructions and more
information about this initiative.
vi

Contents
Chapter 1. Programming site data .......................................................1
1.1 Introduction ......................................................................................1
1.2 Programming methods ...........................................................................1
1.3 The XGF868i keypad .............................................................................2
1.4 Activating a channel.............................................................................3
1.5 Entering system data for the channel ............................................................3
1.5.1 Accessing the channelx-system submenu ...............................................................3
1.5.2 Selecting volumetric units ................................................................................3
1.5.3 Selecting totalizer units ...................................................................................4
1.5.4 Selecting mass flow units .................................................................................4
1.6 Entering transducer and pipe parameters .......................................................5
1.6.1 Special transducers.......................................................................................5
1.6.2 Pipe data..................................................................................................5
1.7 Entering zero cutoff and setting up inputs ........................................................ 7
1.7.2 Temperature input ........................................................................................7
1.7.3 Base temperature.........................................................................................7
1.7.4 Pressure input.............................................................................................7
1.7.5 Base pressure.............................................................................................7
1.7.6 Low pressure switch.......................................................................................7
1.8 Entering setup data ..............................................................................8
1.8.1 Setting transducer signal parameters ....................................................................8
1.8.2 Initializing setup parameters - default setup ............................................................10
1.8.3 Setting response time - V averaging ....................................................................10
1.8.4 Using advanced features .................................................................................11
1.9 Entering global data .............................................................................12
1.9.1 Entering global system data .............................................................................12
1.9.2 Setting up inputs and outputs ...........................................................................13
1.9.3 Configuring the Communications port ..................................................................18
1.9.4 Requesting parameters using MODBUS..................................................................19
1.10 Exiting the user program ................................................................................ 22
Chapter 2. Displaying data ............................................................23
2.1 Introduction ....................................................................................23
2.2 Displaying data with the LCD....................................................................23
2.2.1 Adjusting LCD Contrast.................................................................................. 23
2.2.2 Programming the LCD................................................................................... 23
2.3 Displaying data on a computer terminal ........................................................24
2.3.1 Preparing for PanaView programming..................................................................24
2.3.2 The text display output..................................................................................24
2.3.3 Graphing the output .................................................................................... 25
2.3.3 Displaying transducer signals ..........................................................................26
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Chapter 3. Logging data ...............................................................29
3.1 Introduction ....................................................................................29
3.2 Logging with PanaView .........................................................................29
3.3 Creating meter logs.............................................................................30
3.3.1 Creating a standard meter log .........................................................................30
3.3.2 Creating an error log.....................................................................................31
3.4 Creating PC logs ................................................................................32
3.5 Viewing meter log files ..........................................................................33
3.6 Viewing PC log files .............................................................................34
Chapter 4. Printing data ...............................................................35
4.1 Data types for printing ..........................................................................35
Chapter 5. Clearing data ..............................................................37
5.1 Introduction ....................................................................................37
5.2 Clearing the XGF868i memory ..................................................................38
5.2.1 Clearing site data.......................................................................................38
5.2.2 Clearing log files ........................................................................................38
5.2.3 Clearing the Totalizers ..................................................................................38
Appendix A. Menu maps...............................................................39
Appendix B. Data records ..............................................................45
B.1 Available option cards ..........................................................................45
B.2 Option cards installed ..........................................................................45
B.3 Setup data......................................................................................46
Appendix C. Programming the XGF868i with PanaView™ ............................... 51
C.1 Introduction .................................................................................... 51
C.2 Programming with PanaView™. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
C.2.1 Preparing for PanaView programming.................................................................. 52
C.2.2 Setting up the communications port ................................................................... 52
C.2.3 Setting up Ethernet communications ...................................................................53
C.2.4 Modifying Ethernet parameters .........................................................................53
C.3 Adding the XGF868i .............................................................................54
C.4 Entering the user program using PanaView .....................................................55
C.5 Entering data in the channel menu..............................................................57
C.5.1 Selecting the channel measurement method .......................................................... 57
C.5.2 Entering data in the channel system option ............................................................ 57
C.5.3 Entering pipe parameters...............................................................................58
C.5.4 Entering input/output parameters ......................................................................60
C.5.5 Entering setup parameters...............................................................................61
viii

C.6 Entering data in the global menu ...............................................................64
C.6.1 Entering global-system data............................................................................64
C.6.2 Setting up inputs and outputs ..........................................................................65
C.6.3 Entering communications data..........................................................................71
C.7 Exiting the site edit menu .......................................................................75
C.8 Exiting the site edit menu .......................................................................75
C.9 Saving site data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
C.9.1 Saving current site data to the meter ................................................................... 76
C.9.2 Saving new site data to the XGF868i .....................................................................77
C.9.3 Saving a site to the PC ...................................................................................77
C.9.4 Clearing a site from the meter ...........................................................................77
C.9.5 Saving site data in text form .............................................................................77
Appendix D. PanaView menu maps for the XGF868i ....................................79
Appendix E. Foundation fieldbus communications .....................................85
E.1 Introduction ....................................................................................85
E.2 Configuration utility setup ......................................................................86
E.3 Selecting the desired measurements ...........................................................86
E.4 Selecting units for AI blocks .....................................................................87
E.5 Resetting instrument totalizers..................................................................87
E.6 Function block application......................................................................88
ix

x

Chapter 1. Programming site data
1.1 Introduction
The XGF868i flow transmitter must be properly installed
and programmed, as described in the Startup guide,
before it can provide accurate flow rate measurements.
After completing the installation and initial setup, use this
chapter to program the advanced features of the XGF868i
keypad program.
Step-by-step programming instructions are presented in
this chapter. Also, as a programming aid, a complete set
of menu maps for the XGF868i are included in Appendix A.
Menu Maps on page 39. The specific figure numbers will
be referenced throughout this chapter, as required.
Refer to the appropriate section for a discussion of the
following keypad program features:
• Channelx-ACTIV - activate one or both channels
and scroll to the desired measurement method.
• Channelx-SYSTM - enter the individual channel
parameters.
• Channelx-PIPE - enter the pipe geometry and other
parameters.
• Channelx-I/O - set up the inputs and outputs.
• Channelx-SETUP - set the signal limits, response times
and mass flow status.
• Global-SYSTM - scroll to system units (English or metric).
• Global-I/O - set up error handling, option cards
and the display.
• Global-COMM - set the serial port parameters.
NOTE: The “x” in CHx represents the channel number.
To get the XGF868i up and running as quickly as possible
you must, as a minimum, activate the channel(s), enter the
channel and global system data and the pipe parameters.
The procedure options section at the end of each menu will
help you in programming the required (quick startup) and
optional data.
NOTE: In this manual, only the programming of channel 1 will
be described. To program channel 2 of a 2-channel meter,
simply repeat the same procedure presented for channel 1.
1.2 Programming methods
You can program the XGF868i via either the keypad on the
lower part of the glass window, or PanaView™, a PC-based,
non-resident software program that communicates with
the XGF868i via its RS232 serial port. PanaView supplements
basic XGF868i functions with several additional capabilities.
With PanaView, you can:
• Load and save site file data
• Create and save graph and log files
• Display text output and graphs of live measurement data
• Create custom templates for displaying text, graph and
log data
• Interface with multiple Panametrics instruments.
Although the actual displays differ somewhat, the general
procedures are the same for all three programming
methods. This chapter provides detailed programming
instructions for use with the magnetic keypad. If you
are using PanaView™, see Appendix C. Programming
the XGF868i with PanaView on page 51 , and/or the
PanaView™ user’s manual (910-211) for detailed instructions.
IMPORTANT
This manual is for instruments using software version
Y4AM or later.
1

1.3 The XGF868i keypad
Keypad program
Along with the 2-line, 16-character LCD, the XGF868i
includes a 6-key magnetic keypad. The decal cutout for
each key contains a hall effect sensor, pushbutton switch
and visible red LED. The magnetic wand used to activate a
magnetic key is found attached to the meter chassis below
the front panel. An operator activates the key by pressing
the magnetic wand up to the glass lid over the desired key.
The LED will light indicating a successful key press.
NOTE: The pushbutton switch will also act as a key press
but is done with the glass lid open. Do not use the
pushbutton switch in a hazardous area where the lid
needs to be installed.
Use the magnetic keypad to navigate through the user
program. The menu map may be followed in sequence,
or the four arrow keys may be used to scroll through the
prompt screens. Figure 1 shows the front of the XGF868i,
with magnetic keypad and magnetic wand.
Magnetic
wand
ENTERESCAPE
DigitalFlow™ XGF868i
Figure 1: XGF868i magnetic keypad and wand
IMPORTANT
The XGF868i keypad enables programming of the
instrument through the glass faceplate without removing
the cover. Thus, all programming procedures may be
performed while the unit is installed in a hazardous area.
Six keys on the keypad enable users to program
the XGF868i:
• [Enter] - confirms choice of a specific option and
data entry within the option
• [Escape] - allows users to exit from a specific option
without entering unconfirmed data
• [] and [] - enable users to highlight a specific
window in the display option or to scroll through a list
of options (parameters, letters, and numbers 0-9 as well
as the negative sign and decimal point) in a menu
• [] and [] - enable users to scroll to a specific
option, among choices in an option, or to a character
in a text entry.
When you power up the XGF868i, the display first shows the
model and software version:
The meter then starts to display measured parameters.
To enter the keypad program, press the [escape] key,
followed by the [enter] key, and the [escape] key again.
Each successive key must be entered within 10 seconds of
the prior key.
As a guide in following the programming instructions in
this chapter, the relevant portions of the XGF868i menu
map have been reproduced in Figure 28 on page 40 and
Figure 29 on page 41. Proceed to the following sections to
enter data in the channel or globl menus.
IMPORTANT
If the keypad has not been pressed for 10 minutes,
the XGF868i exits the keypad program and returns
to displaying measurements. The meter retains any
configuration changes that were confirmed with the
[enter] key, and restarts as if the operator had completed
the programming cycle.
2

1.4 Activating a channel
The channelx-ACTIV submenu permits selection of the
desired measurement method. In addition, it is used
to activate/deactivate one or both of the channels in a
2-channel XGF868i.
While following the programming instructions, refer
to Figure 28 on page 40. To access the channelx-ACTIV
submenu:
1. In the keypad program, scroll to prog and
press [enter].
2. In the prog menu, scroll to CH1 or CH2 and
press [enter].
3. In the channel program menu, scroll to ACTIV and
press [enter].
4. Scroll to burst to activate the channel/path, and
press [enter].
5. Scroll to one of the measurement methods described
below and press [enter].
• Skan only is the preferred technique for locating the
acoustic signal and for high velocity measurements.
It is more robust in a noisy environment than the
measure technique.
• Skan/measure is the preferred technique to use for
low velocity measurements.
If skan only is selected at the above prompt, the meter
uses this technique exclusively. However, if skan/measure
is selected, the meter uses skan only to find the acoustic
signal and then tries to use the skan/measure technique
for the actual measurement.
NOTE: To change the skan only and skan/measure
parameters, see the signal submenu section of
this chapter.
Procedure options
After completing the above step, the XGF868i returns to the
channel program window. Do one of the following:
• To continue entering “quick startup” data, proceed
to step 3 in the following section.
• To continue regular programming, refer to
Appendix A. Menu Maps on page 39, to navigate
to the desired menu.
• To leave the keypad program, press [escape] twice.
1.5 Entering system data for
the channel
The channelx-system submenu is used to enter
system parameters for the channel. While following the
programming instructions, refer to Figure 28 on page 40.
1.5.1 Accessing the channelx-system submenu
1. In the keypad program, scroll to prog and
press [enter].
2. In the prog menu, scroll to CH1 or CH2 and
press [enter].
3. In the channel program menu, scroll to systm
and press [enter].
4. Use the arrow keys to enter the desired channel label
(up to 5 characters) and press [enter].
5. Use the arrow keys to enter the desired site/channel
message (up to 21 characters) and press [enter].
1.5.2 Selecting volumetric units
1. Scroll to the desired volumetric units for the flow rate
display and press [enter]. Table 1 lists available units.
2. Scroll to the desired volumetric time units for the
flow rate display and press [enter].
3. Scroll to the desired number of vol. decimal digits
(digits to the right of the decimal point in the
volumetric flow rate display) and press [enter].
Table 1: Available volumetric/totalizer units
English Metric
ACF = Actual cubic feet ACM = Actual cubic meters
KACF = Thousands of ACF KACM = Thousands of ACM
MMACF = Millions of ACF MMACM = Millions of ACM
SCF = Standard cubic feet SCM = Standard cubic meters
KSCF = Thousands of SCF KSCM = Thousands of SCM
MMSCF = Millions of SCF MMSCM = Millions of SCM
3

1.5.3 Selecting totalizer units
1. Scroll to the desired totalizer units for a totalized
flow rate display and press [enter]. Table 1 on page 3
lists available units.
2. Scroll to the desired number of tot decimal digits
(digits to the right of the decimal point in the
totalized flow rate display) and press [enter].
3. Do one of the following:
• If MASS FLOW is ON, proceed to selecting the
mass flow units on the following page.
• If MASS FLOW is OFF, the meter returns to the
channel program. Go to procedure options
on the next page.
NOTE: Refer to Activating mass flow on page 11.
1.5.4 Selecting mass flow units
1. Scroll to the desired mass flow units for the flow rate
display and press [enter]. The available units for this
prompt are determined by the selection made at
system units (see Table 2 below).
Table 2: Available mass flow units
English Metric
Pounds Kilograms
Thousands of LB Metric tons (1,000 KG)
Millions of LB
Tons (2,000 LB)
2. Scroll to the desired mass flow time units for the
mass flow rate display and press [enter].
3. Scroll to the desired number of Mdot decimal digits
(digits to the right of the decimal point in the
mass flow rate display) and press [enter].
4. Scroll to the desired mass (totalizer) units for the
totalized mass flow rate display and press [enter].
The available units for this prompt are determined
by the selection made at the system units prompt.
5. Scroll to the desired number of mass decimal digits
(digits to the right of the decimal point in the totalized
mass flow rate display) and press [enter].
Procedure options
After completing the steps on the previous page, the
XGF868i returns to the channel program window.
Do one of the following:
• To continue entering “quick startup” data, continue
to step 1 in Entering transducer and pipe parameters on
page 5.
• To continue regular programming, refer to
Appendix A. Menu Maps on page 39, to navigate
to the desired menu.
• To leave the keypad program, press [escape] twice.
4

1.6 Entering transducer and pipe parameters
Enter the transducer and pipe parameters via the pipe
submenu. While following the programming instructions,
refer to Figure 28 on page 40.
1. From the channel program menu, scroll to the pipe
option and press [enter].
2. The first prompt asks for the transducer number.
• For a standard transducer, use the arrow keys to
enter the number engraved on the transducer head,
and press [enter].
• If there is no number engraved on the transducer
head, press the right arrow key to scroll to the
STD option, and use the up and down arrow keys to
change to spec. Then use the arrow keys to enter an
assigned number (from 91 to 99), and press [enter].
IMPORTANT
Special transducers have no engraved number on the
head and are rarely used. Examine the transducer head
carefully for a number.
• If you entered the number for a standard transducer,
proceed to the pipe OD prompt in step 5.
• If you entered the number for a special transducer,
proceed to step 3 below.
1.6.1 Special transducers
NOTE: For special transducers, Panametrics supplies a
transducer data sheet with programming information.
3. Scroll to the transducer frequency (supplied by the
factory) and press [enter].
NOTE: The frequency is required to transmit an excitation
voltage at the transducer’s natural frequency.
4. Enter the special transducer tw (time delay) value
(supplied by the factory) and press [enter].
Tw is the time required for the transducer signal to
travel through the transducer and its cable. This time
delay must be subtracted from the transit times of the
upstream and downstream transducers to ensure an
accurate flow rate measurement.
1.6.2 Pipe data
If either a standard or a special transducer is being used,
the programming sequence should be rejoined at this point.
5. To select the appropriate pipe OD unit type from
the list shown in Table 3, scroll to the right side of the
screen, and use the up and down arrow keys to step
through the list. Press [enter]. Then use the arrow
keys to enter the known pipe outside diameter or
circumference on the left side and press [enter].
Obtain the required information by measuring either
the pipe outside diameter (OD) or circumference at the
transducer installation site. The data may also be obtained
from standard pipe size tables found in sound speeds and
pipe size data (914-004).
Table 3: Available pipe size units
English Metric
Inches mm = Millimeters
Feet m = Meters
in/PI = Pipe circumference
in inches
mm/PI = Pipe circumference
in millimeters
ft/PI= Pipe circumference
in feet
m/PI = Pipe circumference
in meters
6. Use the arrow keys to enter the known pipe wall thickness
(in inches or mm) and press [enter]. If the pipe wall
thickness is not available, look up the value in a table
of standard pipe size data which can be found in the
Sound speeds and pipe size data manual (914-004)
IMPORTANT
Because the units cannot be independently chosen for
this parameter, the value must be entered in the same
units used for the pipe OD/circumference.
5

1.6.2a Path and axial lengths
7. To enter the path length:
a. Use the [] arrow key to highlight the path length
unit type at the right of the screen. Then use the []
and [] arrow keys to scroll to the desired unit type.
b. Use the [] arrow key to return to the numeric entry
on the left, and enter the path length of the ultrasonic
signal. Press [enter].
NOTE: If a spoolpiece was ordered with the meter, the
transducer signal path length (P) and the transducer signal
axial length (L) are engraved on the flowcell and/or are
included in the documentation supplied with the meter.
For on-site transducer installations, refer to Appendix C,
measuring P and L dimensions, in the Startup Guide.
8. In the same manner, enter the appropriate axial
length L unit type and axial length of the ultrasonic signal,
and press [enter].
9. Scroll to the desired fluid type and press [enter]. Then do
one of the following:
• If other was selected - proceed to step 10.
• If air was selected - proceed to step 11.
10. Use the arrow keys to enter the fluid soundspeed (in feet
per second) in the gas to be measured and press [enter].
11. Scroll to the appropriate choice to indicate whether you
want Reynolds Correction, and press [enter].
• If off is selected, go to step 12.
• If on is selected, the program asks for the kinematic
viscosity. Use the arrow keys to enter the desired value,
and press [enter].
12. Use the arrow keys to enter a value for the flow calibration
factor and press [enter]. The default value is 1.00, but
values between 0.50 and 2.0 may be entered.
Procedure options
After entering the calibration factor, the XGF868i returns to
the channel program. Do one of the following:
• To continue entering “quick startup” data, press [escape]
once and proceed to step 1 in Entering global system data
on page 12.
• To continue regular programming, refer to Appendix A,
menu maps, to navigate to the desired menu.
• To leave the keypad program, press the [escape]
key twice.
6

1.7 Entering zero cutoff and setting up inputs
Enter the zero cutoff value and set up the temperature and
pressure inputs via the I/O submenu. While programming
these parameters, refer to Figure 28 on page 40.
IMPORTANT
If an option card in slot 1 fails to appear in this menu, it
may be turned off. See the global-I/O-options section for
setup instructions.
1.7.1 Zero cutoff value
Near a zero flow rate, the XGF868i’s readings may fluctuate
due to small offsets caused by thermal drift or similar
factors. To force a zero display reading when there is
minimal flow, enter a zero cutoff value as described below.
1. In the keypad program, scroll to prog and press [enter].
2. In the prog menu, scroll to CH1 or CH2 and press [enter].
3. In the channel program menu, scroll to I/O and
press [enter].
4. Enter a value from 0 to 1 ft/sec (0 to 0.30 m/sec) for
the zero cutoff and press [enter]. The recommended
setting is 0.0200 ft/sec (0.0009 m/sec).
1.7.2 Temperature input
The XGF868i can use either a fixed temperature value
or a live temperature input to calculate the density for
the mass flow rate display.
1. Scroll to a fixed temperature value or to set up the
option card in slot 1 that will supply the live temperature
input and press [enter].
NOTE: If slot 1 contains an activated option card with an
analog input assigned to temperature or an RTD input,
slot 1 appears as an option at the above prompt. If the
process temperature is stable, a fixed value may be used,
but most applications require a live temperature input.
If there is no active option card for temperature, the
meter assumes you are using a fixed temperature.
2. Proceed to one of the following sections:
• If you selected fixed - proceed to step 3.
• If you selected slot 1 - proceed to step 4.
3. Enter the known fixed temp. (process temperature)
and press [enter]. The meter will accept values
from –328° to 1832°F (–200° to 1000°C). Proceed to
Base temperature below.
4. Scroll to input A or input B and press [enter]. The inputs
were labeled during setup.
NOTE: The set up of input A is used as an example. Identical
procedures would be used to set up input B.
1.7.3 Base temperature
1. Use the arrow keys to enter the base temperature and
press [enter]. The ratio of this value to the
actual temperature is used to calculate the
standard mass flow rate.
2. Do one of the following:
• If you selected pressure as the input type,
proceed to pressure input below.
• If you selected temperature as the input type,
proceed to base pressure below.
1.7.4 Pressure input
1. Scroll to a fixed pressure value or to set up the option
card in slot 1 that will supply the live pressure input
and press [enter].
NOTE: If slot 1 contains an activated option card with an
input assigned to pressure, slot 1 appears as an option at the
above prompt. If the process pressure is stable, a fixed value
may be used, but most applications require a live pressure
input. If there is no active option card for pressure, the meter
assumes you are using a fixed pressure.
2. Proceed to one of the following steps:
• If you selected fixed - proceed to step 3.
• If you selected slot 1 - proceed to step 4.
3. Enter the known fixed process pressure and press [enter].
The meter will only accept values from 0 to 5,000 psia.
Proceed to base pressure below.
4. Scroll to input A or input B and press [enter]. The inputs
were labeled during setup.
NOTE: The set up of input A is used as an example. Identical
procedures would be used to set up input B.
1.7.5 Base pressure
1. Enter the base pressure and press [enter]. The ratio of
this value to the actual pressure is used to calculate the
standard mass flow rate.
1.7.6 Low pressure switch
1. Scroll to yes or no to activate or deactivate the low
pressure switch software function and press [enter].
2. Proceed to one of the following steps:
• If you selected yes - proceed to step 3.
• If you selected no - go to procedure options below.
3. Enter the pressure limit, the low pressure switch set point,
and press [enter]. The acceptable range is 0 to 5000 psia.
The meter will stop taking readings if the pressure drops
below this value.
Procedure options
After completing the above steps, the XGF868i returns to the
channel Program window. Do one of the following:
• To continue programming, refer to Appendix A. Menu
Maps on page 39, to navigate to the desired menu.
• To leave the keypad program, press [escape]
three times.
7

1.8 Entering setup data
The signal limits, response times, mass flow and multiple
K factors for the XGF868i are specified via the setup
submenu. The following four submenus are included
in this section:
• Signal - set the parameters related to the transducer
signal (see below).
• Default setup - reset all parameters to default
values (Initializing setup parameters - default setup
on page 10).
• V averaging - specify the response of the meter to
step changes (Setting response time - V averaging
on page 10).
• Advanced features - enable mass flow and enter
K factors (Using advanced features on page 11).
While following the programming instructions, refer
to Figure 29 on page 41. Record all programmed data in
Appendix B, data records.
1.8.1 Setting transducer signal parameters
Use this option to set the limits for the incoming signal
and other parameters affecting the transducer signal. For
example, the programmed signal strength low limit may be
used to determine the trigger point for an alarm.
CAUTION!
The signal default settings are suitable for
most applications. Consult with Panametrics
before changing any of these parameters.
Only after consulting the factory, complete the following
steps to program the signal parameters:
1. In the keypad program, scroll to prog and press [enter].
2. In the prog menu, scroll to CH1 or CH2 and press [enter].
3. In the channel program menu, scroll to setup and press
[enter].
4. Scroll to signl and press [enter].
5. Use Table 4 on page 8 to choose the desired values.
Use the arrow keys to enter a value (or scroll to a value for
a parameter with menu options) and press [enter].
Procedure options
After completing the above steps, the XGF868i returns to the
channel SET UP window. Do one of the following:
• To continue programming, refer to Appendix A. Menu
Maps on page 39, to navigate to the desired menu.
• To leave the keypad program, press [escape] three times.
Table 4: Transducer signal settings
Transducer signal
parameters Range Default value Description
Signal low limit -20 to 100 20
The E1:LOW SIGNAL error message appears when the signal strength falls
below the programmed SIGNAL LOW LIMIT value. See Chapter 2 in the
service manual for a discussion of error codes.
Correlation peak
limit 0 to 500 100
The E4: SIGNAL QUALITY error message appears when the signal quality
falls below the programmed COR. PEAK LIMIT value. See Chapter 2 in the
service manual for a discussion of error codes
Soundspeed+-
limit 1 to 50% 20%
The E2:SOUNDSPEED error message appears when the calculated
fluid sound speed differs from the fluid sound speed entered in the
Channelx-system menu by more than the programmed SOUNDSPEED
+- LIMIT value. See Chapter 2 in the service manual for a discussion of
error codes.
Velocity low limit
-500 to 500 ft/
sec (-150 to 150
m/sec)
-150 ft/sec
(-46 m/
sec)
The E3: VELOCITY RANGE error messages appears when the calculated
fluid velocity is less than the programmed VELOCITY LOW LIMIT value.
See Chapter 2 in the service manual for a discussion of error codes.
Velocity high limit
-500 to 500 ft/
sec (-150 to 150
m/sec)
150 ft/sec
(46 m/sec)
The E3: VELOCITY RANGE error messages appears when the calculated
fluid velocity exceeds the programmed VELOCITY HIGH LIMIT value.
See Chapter 2 in the service manual for a discussion of error codes.
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Table 4: Transducer signal settings
Transducer signal
parameters Range Default value Description
Acceleration limit 0 to 250 ft/s
(0 to 76 m/s)
15 ft/s
(5 m/s)
The E6: CYCLE SKIP error message appears when the calculated fluid
velocity changes by more than the programmed ACCELERATION LIMIT
value from one reading to the next. See Chapter 2 in the service manual
for a discussion of error codes.
Amplitude
discriminator low 0 to 100 14
The amplitude discriminator measures the transducer signal received
by the model XGF868i. The default value for the above parameter is
14, and values from 0 to 100 are acceptable. The E5: AMPLITUDE error
message appears when the amplitude discriminator falls below the
programmed AMP. DISCRIM LOW value. See Chapter 2 in the service
manual for a discussion of error codes.
Amplitude
discriminator high 0 to 100 34
The amplitude discriminator measures the transducer signal received
by the model XGF868i. The default value for the above parameter is
34, and values from 0 to 100 are acceptable. The E5: AMPLITUDE error
message appears when the amplitude discriminator exceeds the
programmed AMP. DISCRIM HIGH value. See Chapter 2 in the service
manual for a discussion of error codes.
Delta T offset -1000 to 1000
sec 0 sec An offset between the upstream and downstream transit times is specified at this prompt.
Skan T offset –500 to 500
sec 58 sec
At this prompt, specify a time measurement offset that compensates
for any shift resulting from cross-correlation. Set to 0 for active skan T
offset.
% of peak 1 to 100% 50% The percentage of peak used to calculate the transit times and Delta T
is specified at this prompt.
M>S switch 0 to 250 sec 50sec
If the burst mode is set to skan/measure (S/M), the meter switches from
skan to measure mode when Delta T is less than the M>S_switch value.
DO NOT change this value unless advised to do so by the factory.
# shifts 0 to 10 3
The number of shifts corresponds to the actual number of transmits per
cycle (number of signals added together in one direction to produce
an averaged signal for one interrogation of the fluid) and need only be
changed if the environment is very noisy or the acoustic signal is weak.
A divisor 0.1 to 10 2.5 A divisor is used to calculate the measure mode integrated threshold
level and is not normally changed.
# transmit pulses 1 to 16 4
# transmit pulses specifies the number of pulses in a burst. For difficult
conditions (i.e. long paths, high velocity or high temperature), settings
as high as 16 may be necessary.
T window (cycles) 0 to 1000 0
The XGF868i calculates the size of the transmit window based on pipe
size and fluid sound speed. However, for diagnostic purposes, the
window size may be reset.
R window (cycles) 10 to 128 10
The XGF868i calculates the size of the receive window based on pipe
size and fluid soundspeed. However, for diagnostic purposes, the
window size may be reset.
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1.8.2 Initializing setup parameters -
default setup
Use this option to initialize (reset) all of the parameters
within the setup menu to their default values. Complete
the following steps to reset all of the parameters:
1. In the keypad program, scroll to prog and
press [enter].
2. In the prog menu, scroll to CH1 or CH2 and
press [enter].
3. In the channel program menu, scroll to setup
and press [enter].
4. Scroll to init. press [enter].
5. Scroll to yes to initialize default parameters or
no to abort this command. Press [enter].
Procedure options
After completing the above steps, the XGF868i returns
to the channel set up window. Do one of the following:
• To continue programming, refer to Appendix A. Menu
Maps on page 39, to navigate to the desired menu.
• To leave the keypad program, press [escape]
four times.
1.8.3 Setting response time - V averaging
Use this option to specify the number of readings that
occur before the meter will respond to a step change in
flow rate. In general, the smaller the number of readings,
the less steady the display will appear. Complete the
following steps to set the response time:
IMPORTANT
Do not change this number unless instructed to do so by
Panametrics personnel.
1. In the keypad program, scroll to prog and
press [enter].
2. In the prog menu, scroll to CH1 or CH2 and
press [enter].
3. In the channel program menu, scroll to setup
and press [enter].
4. Scroll to avrg and press [enter].
5. Scroll to the response time (in number of readings)
from the pull-down menu and press [enter].
For best results, select a value of 30 to ensure
the most stable signal.
Procedure options
After completing the above steps, the XGF868i returns
to the channel SET UP window. Do one of the following:
• To continue programming, refer to Appendix A. Menu
Maps on page 39, to navigate to the desired menu.
• To leave the keypad program, press [escape]
four times.
10