Technical content subject to change without notice.
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Preface
Information Paragraphs
•Note paragraphs provide information that provides a deeper understanding of the situation, but is not essential to
the proper completion of the instructions.
•Important paragraphs provide information that emphasizes instructions that are essential to proper setup of the
equipment. Failure to follow these instructions carefully may cause unreliable performance.
•Caution! paragraphs provide information that alerts the operator to a hazardous situation that can cause damage to
property or equipment.
•Warning! paragraphs provide information that alerts the operator to a hazardous situation that can cause injury to
personnel. Cautionary information is also included, when applicable.
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
The user must make sure that he operates all auxiliary equipment in accordance with local codes, standards,
regulations, or laws applicable to safety.
Working Area
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.
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.
DigitalFlow™ XMT868i Programming Manualiii
Preface
Environmental Compliance
Waste Electrical and Electronic Equipment (WEEE) Directive
GE Measurement & Control is an active participant in Europe’s Waste Electrical and Electronic Equipment (WEEE)
take-back initiative, directive 2002/96/EC.
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
http://www.ge-mcs.com/en/about-us/environmental-health-and-safety/1741-weee-req.html for take-back
instructions and more information about this initiative.
The Model XMT868i 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 Model XMT868i’s Keypad Program.
The Keypad Program provides access to the various programmable features of the Model XMT868i. Step-by-step
programming instructions are presented in this chapter. Refer to the appropriate section for a discussion of the
following menu features:
•Channel-ACTIV - activate one or both channels and select the desired measurement method
•Channel-SYSTM - enter the individual channel parameters
•Channel-PIPE - enter the pipe parameters
•Channel-I/O - set up the inputs and outputs
•Channel-SET UP - set the signal limits, response times and activating mass flow.
•GLOBL-SYSTM - enter the system units
•GLOBL-I/O - set up error handling, option cards and display
•GLOBL-COMM - set the serial port and MODBUS parameters
As a programming aid, a complete set of menu maps for the
specific figure numbers will be referenced throughout this chapter, as required.
PROG menu is included in Appendix A, Menu Maps. The
1.2Programming Methods
You can use two methods for programming the XMT868i flowmeter:
•The keypad (shown in Figure 1 on page 2), which permits direct communication with the XMT868i
IMPORTANT: The XMT868i’s keypad permits 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.
•PanaView™, a PC-based software program that communicates with the XMT868i using its RS232/RS485 serial
Ethernet port.
Although the displays differ, the general procedures are the same for the keypad and PanaView methods. This chapter
provides detailed keypad programming instructions. If you are using PanaView, please refer to Appendix C,
Programming with PanaView, and/or the PanaView User’s Manual for complete instructions.
DigitalFlow™ XMT868i Programming Manual1
Chapter 1. Programming Site Data
Keypad Program
Along with the 2-line, 16-character LCD, the XMT868i 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 XMT868i, with
magnetic keypad and magnetic wand.
Magnetic Wand
Figure 1: XMT868i Magnetic Keypad and Wand
Programming of the
ACTIV, SYSTM, and PIPE submenus of the CHx menus and the GLOBL-SYSTM menu are required
for basic operation of the Model XMT868i. Failure to accurately enter all of the necessary information will result in
unreliable flow data. Therefore, be sure to complete at least the sections of this chapter pertaining to those three
submenus.
Note:Because it is so essential, instructions for programming the ACTIV, SYSTM, and PIPE submenus of the CHx menus
and the GLOBL-SYSTM submenus are also included in the Startup Guide. If that programming has already been
completed, skip those sections in this chapter.
Except for the three submenus noted above, it is not necessary to program the Model XMT868i flowmeter in any
particular order. Therefore, the sections of this chapter need not be completed in sequence. Enter the keypad program as
described in Accessing the Keypad Program on the next page and proceed immediately to any section of interest.
Note:Be sure to record all the programming data entered in this chapter in Appendix B, Data Records.
2DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.2.1Accessing the Keypad Program
Six keys on the keypad enable users to program the XMT868i:
•[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, numbers) 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. Also, if the [] key is pressed when the cursor position (underlined) is at the first digit of the bottom LCD
line, the previous parameter is displayed and can be edited.
When you power up the XMT868i, the initial screen shows the model and software version:
GE
XMT868i X3A.STD
The meter then starts to display measured parameters.
CH1 VEL E1
10.00 Ft/s
To enter the Keypad Program, press the
[Escape] key, followed by the [Enter] key, and the [Escape]key again.Each
successive key must be pressed within 10 seconds of the prior key. The Keypad Program window appears:
KEYPAD PROGRAM
PROG 1
Press
[Enter] to begin programming in the Channel or Global menus.
IMPORTANT: If the keypad has not been pressed for 10 minutes, the XMT868i 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.
DigitalFlow™ XMT868i Programming Manual3
Chapter 1. Programming Site Data
1.3Entering Data in the Channel Menu
The Channel menu is used to enter data specific to each channel. Refer to Figure 28 on page 77 and remember to record
all programming data in Appendix B, Data Records.
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 procedures presented for Channel 1.
1.3.1Selecting the Channel Measurement Method
The ACTIV submenu permits selection of the desired measurement method.
1. In the Keypad Program, scroll to PROG and press [Enter].
2. In the PROG menu, scroll to the desired channel (CH1 or CH2) and press [Enter].
Note:In the 1-Channel XMT868i, CH2 does not appear.
3. In the Channel PROGRAM menu, scroll to ACTIV and press [Enter].
4. The option offers two choices: OFF and TRANS (Transit-Time). Scroll to the desired option for this channel and
press [Enter].
Note:In the 1-Channel XMT868i, OFF does not appear.
The XMT868i returns to the Channel PROGRAM menu. Scroll to the SYSTM option.
4DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.2Entering Data in the Channel System Option
1. From the Channel PROGRAM menu, scroll to SYSTM and press [Enter].
2. The first prompt asks for the Channel (Site) Label.Use the four arrow keys to enter the desired label (in any
numeric or text combination up to five characters), and press [Enter].
3. The next prompt asks for the Channel (Site) Message. Use the four arrow keys to enter up to 15 characters, and
press [Enter].
4. The program now asks if you want the Energy Option, which enables flow measurement in a heating or cooling
system. Scroll to Off or On, and press [Enter].
5. The next prompt asks for the Volumetric Units. Scroll through the units (from the list shown in Table 1) and press
[Enter] when you reach the desired unit.
Note:Refer to the SYSTM option of the GLOBL menu to choose between English and metric measurements.
Table 1: Available Volumetric Units
English Volumetric UnitsMetric Volumetric Units
GAL/S - U.S. Gallons per Second L/S = Liters per Second
GAL/M - U.S. Gallons per MinuteL/M = Liters per Minute
GAL/H - U.S. Gallons per HourL/H = Liters per Hour
MGD - Mega U.S. Gallons per DayML/D = Mega Liters per Day
ft3/s - Cubic Feet per Secondm^3/s = Cubic Meters per Second
ft3/m - Cubic Feet per Minutem^3/m = Cubic Meters per Minute
ft3/h- Cubic Feet per Hourm^3/h = Cubic Meters per Hour
ft3/d- Cubic Feet per Daym^3/d = Cubic Meters per Day
Mf3/d- Mega Cubic Feet per DayMm3/d = Mega Cubic Meters per Day
BBL/S - Barrels per SecondBBL/S = Barrels per Second
BBL/M - Barrels per MinuteBBL/M = Barrels per Minute
BBL/H - Barrels per HourBBL/H = Barrels per Hour
BBL/D - Barrels per DayBBL/D = Barrels per Day
MBL/D - Mega Barrels per DayMBL/D = Mega Barrels per Day
A-I/S-Acre-inches per secondN/A
A-I/M -Acre-inches per minuteN/A
A-I/H -Acre-inches per hourN/A
A-I/D -Acre-inches per dayN/A
A-F/S -Acre-feet per secondN/A
A-F/M-Acre-feet per minuteN/A
A-F/H -Acre-feet per hourN/A
A-F/D -Acre-feet per dayN/A
DigitalFlow™ XMT868i Programming Manual5
Chapter 1. Programming Site Data
1.3.2Entering Data in the Channel System Option (cont.)
6. Scroll to the desired number of Vol Decimal Digits (digits to the right of the decimal point) in the volumetric flow
display, and press [Enter].
7. Scroll to the desired Totalizer Units for the totalized flow rate display (listed in Table 2), and press [Enter].
.
Table 2: Totalizer Units
EnglishMetric
GAL - U.S. GallonsL - Liters
MGAL - Mega U.S. gallonsML - Megaliters
ft^3 - Cubic Feetm^3- Cubic Meters
Mft^3 - Mega Cubic FeetMm^3- Mega Cubic Meters
BBL - BarrelsBBL - Barrels
MBBL - MegabarrelsMBBL - Megabarrels
AC-IN - Acre-inches
AC-FT - Acre-feet
8. Scroll to the desired number of Decimal Digits (digits to the right of the decimal point) in the totalized flow rate
display, and press [Enter].
The program now varies, depending on whether you have activated Mass Flow (see the Programming Manual for
details) or the Energy Option.
•If you have activated Mass Flow, continue to step 1 on the next page.
•If you have activated the Energy Option (but not Mass Flow), skip to step 1 on page 7.
•If you have activated neither option, the XMT868i returns to the Channel PROGRAM window.
6DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.2aProgramming the Mass Flow Option
1. Scroll to the desired Mass Flow Units for flow rate display (listed in Table 3), and press [Enter].
Table 3: Available Mass Flow Units
EnglishMetric
LB = PoundsKilograms
KLB = KiloPounds (Thousands of Pounds)Tonnes = Metric Tons (1000 KG)
MMLB = MegaPounds
TONS (2000 LB)
2. Scroll to the desired Mass Flow Time Units (from seconds to days), and press
3. Scroll to the desired number of 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 Totals (units for the totalized mass flow rate display, listed in Table 3), and press [Enter].
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].
The program varies, depending on whether or not you have enabled the Energy Option.
[Enter].
•If you have not enabled the option, the XMT868i returns to the Channel PROGRAM window. Proceed to the PIPE
option.
•If you have enabled the option, continue to the next page.
DigitalFlow™ XMT868i Programming Manual7
Chapter 1. Programming Site Data
1.3.2Entering Data in the Channel System Option (cont.)
1.3.2bProgramming the Energy Option
1. Scroll to the desired Power Units (listed in Table 4) and press [Enter].
4. Scroll to the desired number of Energy Decimal Digits, and press [Enter].
5. If you are using a heating or cooling system, scroll to the appropriate selection (Heat or Cool) and press [Enter].
6. The final prompt asks whether you want to conduct Flow Measurement at the point of RTN (Return, where the
liquid exits) or of SPPLY (Supply, where the liquid enters). Scroll to the appropriate choice, and press [Enter].
You have completed entering data in the SYSTM option. The meter returns to the Channel PROGRAM menu.
8DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.3Entering Pipe Parameters
Enter the transducer and pipe parameters using the PIPE submenu. While following the programming instructions, refer
to Figure 29 on page 78.
1. From the
2. The first prompt asks for the Transducer Number.
Channel PROGRAM menu, scroll to the PIPE option and press [Enter].
• For a standard transducer, enter the number engraved on the transducer head in the right pane, and press [Enter].
• If there is no number engraved on the transducer head, press the right arrow key to scroll to the Special option,
enter an assigned number (from 91 to 99), and press
IMPORTANT: Special transducers, which have no engraved number on the head, are rarely used. Examine the
transducer head carefully for a number.
The menu now varies, depending on your selection in step 2.
[Enter].
•If you entered the number for a standard clamp-on transducer, proceed to the Pipe Material prompt in step 4.
•If you entered the number for a standard wetted transducer, proceed to the Pipe OD prompt in step 5.
•If you entered the number for a special transducer, proceed to step 3 below.
1.3.3aSpecial Transducers
Note:For special transducers, GE will supply a transducer data sheet with programming information.
3. For special transducers:
a. The program first asks for the Wedge Type. Press the appropriate transducer type (Rayleigh clamp-on, shear
clamp-on, or wetted).
Note:GE will supply the information required for steps b through f with the transducers.
b. Press the appropriate Frequency (from 500 kHz to 5 MHz).
c.Enter the Time Delay (Tw) value supplied by GE and press
If you have selected a special wetted transducer, the program now goes to step 5. But if you have selected a clamp-on
transducer, three more prompts appear.
d. Enter the Wedge Angle of the transducer (the angle of the ultrasonic transmission, in degrees) and press
e.Enter the Wedge Temperature and press [Enter].
f.Enter the Wedge Soundspeed and press [Enter].
[Enter].
[Enter].
DigitalFlow™ XMT868i Programming Manual9
Chapter 1. Programming Site Data
1.3.3Entering Pipe Parameters (cont.)
1.3.3bPipe Material
4. Scroll to the appropriate Pipe Material from the supplied list. For some materials (shown in Table 6), the program
displays additional selections. At the desired choice, press [Enter].
and press [Enter]. If the soundspeed is
unknown, refer to the Sound Speeds and Pipe Size Data manual (914-004).
10DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.3cPipe OD
5. To select the appropriate Pipe OD unittype from the list shown in Table 7, scroll to the right side of the screen, and
use the up and down arrow keys to step through the list. Press [Enter]. Then 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 7: Available Pipe OD Units
EnglishMetric
inch mm = millimeters
feetm = meters
in/PI = pipe circumference in inchesmm/PI = pipe circumference in millimeters
ft/PI = pipe circumference in feetm/PI = pipe circumference in meters
6. Enter the known Pipe Wall thickness (in inches or mm) in the right pane and press
If you are using clamp-on transducers, skip to step 9 on the next page.
[Enter].
1.3.3dPath 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 (inches or feet for English measurements, or millimeters or meters
for metric).
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, for instructions.
8. In the same manner, enter the appropriate Axial Length L unit type and axial length of the ultrasonic signal, and
press [Enter]. Skip to step 10 on the next page.
1.3.3ePipe Lining
9. Scroll to the appropriate choice to indicate whether you have a Pipe Lining.
a. If you have selected Ye s, then select the Lining Material from the supplied list.
• If OTHER is selected, enter the lining sound speed, and press [Enter].
b. Then enter the lining thickness and press
DigitalFlow™ XMT868i Programming Manual11
[Enter].
Chapter 1. Programming Site Data
1.3.3Entering Pipe Parameters (cont.)
1.3.3fTracking Windows
10. Press the appropriate choice to indicate whether you want Tracking Windows. These windows are used to detect the
receive signal when you are unsure of the fluid sound speed.
1.3.3gFluid Type
11. Press the appropriate Fluid Type. The selections for fluid type vary depending on whether:
• the Energy Option is ON or OFF; and
• the Tracking Window is enabled or disabled.
Refer to Table 8 if Energy Option is
OFF, or to Table 9 on page 13 if Energy Option is ON.
Note:Some of the fluid types may require additional selections, as shown in the following tables.
Table 8: Fluid Types for ENERGY OFF
Tracking Windows =
NOAdditional SelectionsYESAdditional Selections
WaterNormal Water
Sea Water
If Normal Water is selected, enter the Water
Temperature and press [Enter].
OilLube Oil
Crude Oil
Methanol
(25 C)
Ethanol
(25C)
LN2No additional selections required.
FreonNo additional selections required.
OTHEREnter the fluid soundspeed and press [Enter].
No additional selections required.Oil,
No additional selections required.OTHEREnter the Minimum Soundspeed and press
Water,
0-100C
Water,
0-260C
Tracking
No additional selections required.
No additional selections required.
No additional selections required.
[Enter]. Then enter the Maximum Soundspeed
and press [Enter].
12DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.3gFluid Type (cont.)
Table 9: Fluid Types for ENERGY ON
Tracking Windows =
NOAdditional SelectionsYESAdditional Selections
WaterEnter the Water Temperature and press [Enter].Water,
0-260C
Water,
Glycol
Mixture
OTHEREnter the Fluid Soundspeed and press [Enter].OTHEREnter the Minimum Soundspeed and press
Enter the Fluid Soundspeed and press [Enter].
Then enter the Percentage of Water and press
[Enter].
Water,
Glycol
Mixture
No additional selections required.
Enter the Percentage of Water and press [Enter].
[Enter]. Then enter the Maximum Soundspeed
and press [Enter].
1.3.3hReynolds Correction
12. Scroll to the appropriate choice to indicate whether you want Reynolds Correction.
• If Off is selected, enter the Calibration Factor and press [Enter].
• If Activ is selected, the program asks for KV Input Selection. Scroll to SIGS (Signals), SOUND (Soundspeed) or
STATC.
• If SIGS or SOUND is selected, enter the Calibration Factor and press [Enter].
• If STATC is selected, enter the Kinematic Viscosity and press [Enter]. Then enter the Calibration Factor and
press [
Enter].
•For wetted transducers, the program returns to the Channel PROGRAM menu. You have completed entering PIPE
parameters.
•For clamp-on transducers, proceed to step 13 below.
1.3.3iNumber of Traverses
13. Scroll to the appropriate Number of Traverses (from 1 to 5) and press [Enter].
14. Accept the value for the Transducer Spacing by pressing [Enter].
Note:The XMT868i automatically calculates the transducer spacing. You should not enter a different value unless
specifically instructed by the factory.
The XMT868i returns to the Channel PROGRAM menu. You have completed entering PIPE parameters.
Note:The site data programmed in this chapter is automatically stored in the meter’s non-volatile RAM (NVR). If the
power to the meter is disconnected, the same site data will be applied when the unit is next powered on.
DigitalFlow™ XMT868i Programming Manual13
Chapter 1. Programming Site Data
1.3.4Entering Input/Output Parameters
Enter the zero cutoff value and set up the temperature inputs using the I/O submenu. While programming these
parameters, see Figure 30 on page 79.
IMPORTANT: If an option card in Slot 1 fails to appear in this menu, it may be turned OFF. See the GLOBL-I/O-OPTN
section on page 29 for setup instructions.
1.3.4aZero Cutoff Value
Near a zero flow rate, the Model XMT868i’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 in the
following steps:
1. From the Channel PROGRAM menu, scroll to the I/O option in the center pane.
2. The program asks for the Zero Cutoff. 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 0.1 ft/sec (0.03 m/sec).
Proceed with one of the following:
• If the ENERGY OPTION is OFF, the display now returns to the Channel menu.
• If the ENERGY OPTION is ON, refer to Temperature Input below.
1.3.4bTemperature Input
The Model XMT868i can use either a fixed temperature value or a live temperature input to calculate energy. Complete
the following steps to configure this input:
Note:The site data programmed in this chapter is automatically stored in the meter’s non-volatile RAM (NVR). If the
power to the meter is disconnected, the same site data will be applied when the unit is next powered on.
3. At the Temp Supply prompt, scroll to Fixed to enter a constant temperature value or on Slot1 to select the output in
Slot 1 that will provide the live temperature input for the supply.
Note:If Slot 1 contains an activated option card with an analog input assigned to TEMP 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.
14DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.4bTemperature Input (cont.)
4. One of the following two prompts will appear, depending on your selection in Step 3.
• If Fixed was chosen, enter the known fixed process temperature and press [Enter]. The meter will only accept
o
values from –328° to 1832°F (–200
to 1000oC).
• If Slot 1 was chosen, scroll to the desired temperature input (from A to D) and press [Enter].
5. At the Temp Return prompt, scroll to Fixed to enter a constant temperature value or on Slot1 to select the output in
Slot 1 that will provide the live temperature input for the return.
Note:If Slot 1 contains an activated option card with an analog input assigned to TEMP 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.
6. One of the following two prompts will appear, depending on your selection in Step 3.
• If Fixed was chosen, enter the known fixed process temperature and press [Enter]. The meter will only accept
o
values from –328° to 1832°F (–200
to 1000oC).
• If Slot 1 was chosen, scroll to the desired temperature input (from A to D) and press [Enter].
The program now returns to the Channel PROGRAM menu.
1.3.5Entering Setup Parameters
The signal limits and response times for the Model XMT868i are specified using the SET UP submenu. While following
the programming instructions, refer to Figure 30 on page 79. This submenu includes four options:
•SIGNL - set the parameters related to the transducer signal
•AVRG - specify the response of the meter to step changes
•INIT - initialize all parameters to default values
•ADVAN - enable mass flow, edit kinematic viscosity vs. sound speed table, activate K factors, and select transmit
code length.
To enter the SET UP submenu, scroll to the
record all programmed data in Appendix B, Data Records.
SET UP option in the Channel PROGRAM menu and press [Enter]. Remember to
DigitalFlow™ XMT868i Programming Manual15
Chapter 1. Programming Site Data
1.3.5Entering Setup Parameters (cont.)
1.3.5aThe SIGNL Option
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 SIGNL default settings are suitable for most applications. Consult the factory
before changing any of these parameters.
1. From the SET UP option menu, scroll to SIGNL and press [Enter].
2. Press [Enter] to accept the current Signal Low Limit value or enter a new value and press [Enter].
The default value for the above parameter is 40, and values from –20 to 100 are acceptable. The E1: LOW SIGNAL error
message appears when the signal strength falls below the programmed Signal Low Limit value. See Chapter 2, Error Codes, in the Service Manual for a discussion of error codes.
3. Press [Enter]to accept the current Corr. Peak Limit value or enter a new value and press [Enter].
The default value for the above parameter is 100, and values from 0 to 500 are acceptable. The E4: SIGNAL QUALITY error
message appears when the signal quality falls below the programmed Cor. Peak Limit value. See Chapter 2, Error Codes, in the Service Manual for a discussion of error codes.
4. Press [Enter] to accept the current Sndspeed +– Lim. value or enter a new value and press[Enter].
The default value for the above parameter is 20%, and values from 1% to 50% are acceptable. The E2: SOUNDSPEED
error message appears when the calculated fluid soundspeed differs from the fluid soundspeed entered in the
CHx-SYSTM menu by more than the programmed Soundspeed +– Limit value. See Chapter 2, Error Codes, in the
Service Manual for a discussion of error codes.
5. Press [Enter]to accept the current Vel Low Limit value or enter a new value and press [Enter].
The default value for the above parameter is –150.0 ft/sec. (–46 m/sec) and values from –500 to 500 ft/sec (–150 to 150
m/sec) are acceptable. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity is less than the
programmed Velocity Low Limit value. See Chapter 2, Error Codes, in the Service Manual for a discussion of error
codes.
6. Press [Enter]to accept the current Vel High Limit value or enter a new value and press [Enter].
The default value for the above parameter is 40.0 ft/sec (12.142 m/sec) and –100 to 100 ft/sec (-30.48 to 30.48 m/sec)
are acceptable values. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity exceeds the
programmed Vel High Limit value. See Chapter 2, Error Codes, in the Service Manual for a discussion of error codes.
16DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.5aThe SIGNL Option (cont.)
7. Press [Enter]to accept the current Accel. Limit value or enter a new value and press[Enter].
2
The default value for the above parameter is 15.0 ft/sec
are acceptable. 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, Error Codes, in the Service Manual
for a discussion of error codes.
8. Press [Enter]to accept the current Amp. Discrim Low value or enter a new value and press[Enter].
The amplitude discriminator measures the transducer signal received by the Model XMT868i. 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, Error Codes, in the
Service Manual for a discussion of error codes.
9. Press [Enter]to accept the current Amp. Discrim. High value or enter a new value and press [Enter].
The amplitude discriminator measures the transducer signal received by the Model XMT868i. 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, Error Codes, in the Service Manual for a discussion of error codes.
(4.6 m/sec2) and values from 0 to 100 ft/sec2 (0 to 30 m/sec2)
10. Press [Enter]to accept the current Delta T Offset value or enter a new value and press [Enter].
An offset between the upstream and downstream transit times is specified at this prompt. The default value for the
above parameter is 0 sec, and values from –1000 to 1000 sec are acceptable.
11. Press [Enter]to accept the current % of Peak value or enter a new value and press [Enter].
The percentage of peak used to calculate the transit times and Delta T is specified at this prompt. The default value for
the above parameter is -40%, and values from -100 to 100% are acceptable.
Note:This setting is a starting point for detecting the signal. The meter will automatically adjust this value if the
calculated transit time is unacceptable. You can set the limits for this value using the MIN. PEAK% and MAX.
PEAK% discussed on the next page.
12. Scroll to the desired XMIT Sample Size (from 2 to 32) and press [Enter]
Both the upstream and downstream transducers transmit ultrasonic pulses in bursts, which consist of a series of
transmit pulses. XMIT Sample Size determines how many bursts are sent in one direction before sending in the other
direction. The default value for the above parameter is 8 and values of 2, 4, 8, 16 and 32 are available.
13. Press [Enter]to accept the current # Errors Allowed value or enter a new value (0 to 16) and press [Enter].
Use this prompt to enter the number of errors the XMT868i can record before it displays an error message. The default
value is 8.
DigitalFlow™ XMT868i Programming Manual17
Chapter 1. Programming Site Data
1.3.5aThe SIGNL Option (cont.)
14. Press [Enter] to accept the current Min Peak% Limit value or enter a new value and press [Enter].
Use this prompt to enter the minimum percent of peak that the XMT868i can use to measure transit time. The
XMT868i accepts values from -100 to 100.
15. Press
Use this prompt to enter the maximum percent of peak that the XMT868i can use to measure transit time. The
XMT868i accepts values from -100 to 100.
After responding to the above prompt, the meter returns to the
[Enter] to accept the current Max Peak% Limit value or enter a new value and press [Enter].
SET UP option window.
1.3.5bThe AVRG Option
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:
1. From the SET UP option menu, scroll to the AVRG option and press [Enter].
2. Scroll to the desired Response Time (from 1 to 60 sec, or STATS (statistics)) and press [Enter].
For best results, select the STATS (statistics) option, as this increases the response time under steady flow conditions
while still allowing a rapid response to changes in flow rate.
After responding to the above prompt, the meter returns to the SET UP option window.
1.3.5cThe INIT Option
Use this option to initialize (reset) all of the parameters within the SIGNL menu back to their default values. Complete
the following steps to reset all of the parameters:
1. From the SET UP option menu, scroll to INIT in the center pane.
2. Scroll to No to keep the current values or on Ye s to reset all values to their default settings.
After responding to the above prompt, the meter returns to the SET UP window.
1.3.5dThe ADVAN Option
This option enables you to enable the more advanced features of the meter. In this option you can do the following:
• calculate the kinematic viscosity (KV) based on signal strength or on soundspeed
• enter a table of K-factors (based on velocity or reynolds number) that compensates for non-linear flow rates
• enable mass flow (calculated for static fluid density)
• select the size of the transducer transmission signal.
18DigitalFlow™ XMT868i Programming Manual
Chapter 1. Programming Site Data
1.3.5eThe KV/xx Option
Note:To select either signal strength or soundspeed for kinematic viscosity calculations, go to Reynolds Correction
in the PIPE submenu on page 13.
Use this option to calculate the kinematic viscosity (KV) based on signal strength (SS) or on soundspeed, as selected in
the KV Input Selection option of the PIPE option. To use this option, you must enter the KV vs. SS pairs in descending
order of KV and ascending order of SS or soundspeed. For example, if pair 1 is KV = 10 centistrokes and SS = 62, then
pair 2 must be KV
enter KV and signal or soundspeed values:
1. From the ADVAN option menu, scroll to KV/xx and press [Enter].
2. Press [Enter] to accept the current # of KV/SS Pairs or enter a new value (2 to 20) and press [Enter].
3. Press [Enter] to accept the current Sig Strength (or Soundspeed) #01 value or enter a new value and press [Enter].
Enter the signal strength values in ascending order.
Note:For signal strength, the acceptable range is 50.0 to 85.0. For soundspeed, the acceptable range is 125 to 9000.
4. Press [Enter]to accept the current Kinematic Viscosity value or enter a new value (0.050 to 500) and press [Enter].
Enter the kinematic viscosity values in descending order.
10 centistrokes and SS 62. The XMT868i accepts 2 to 20 pairs. Complete the following steps to
The Sig Strength (or Soundspeed) and Kin Viscosity prompts repeat for each pair. After entering all the pairs, the meter
returns to the ADVAN option.
DigitalFlow™ XMT868i Programming Manual19
Chapter 1. Programming Site Data
1.3.5fThe MULTK Factors Option
Use this option to enter a table of K-factors. K-factors are used to create a curve for the flow range (based on velocity
or reynolds number) that compensates for non-linear flow rates. The meter accepts from 2 to 20 pairs. Complete the
following steps to enter multiple K factors for velocity or reynolds values:
1. From the ADVAN option menu, scroll to MULTK and press [Enter].
2. Scroll to Ye s to Activate Multi K or on No to disable this option, and press [Enter].
If NO was selected, the meter returns to the ADVAN window. If YES was selected, proceed to Step 3.
3. Scroll to the desired custom type: CstV (velocity) or CstR (reynolds)
4. Scroll to Ye s to Edit the K-factor Table or on No to retain the current K-factor table (and return to the ADVAN option)
and press [Enter].
Note:If the necessary velocity/reynolds vs. K-factor data was not provided with the Model XMT868i’s
documentation, the K-factor table cannot be edited.
If NO was selected, the meter returns to the ADVAN option. If YES was selected, proceed to Step 5.
5. Enter the Number Of K-factors (from 2 to 20) to be entered into the table, and press [Enter].
Note:When editing the K-factor table, the velocities must be entered in increasing order.
6. Enter the Velocity/Reynolds Value for K-factor number “X” and press [Enter].
7. Enter the K-factor corresponding to velocity/reynolds number “X” (0.333 to 3.0) and press [Enter].
The Velocity # and K Factor # prompts repeat for each pair. After entering all the pairs, the meter returns to the ADVAN
window.
20DigitalFlow™ XMT868i Programming Manual
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