Greyline Instruments DFM-6.1 Operating Manual
www.greyline.com
USER'S GUIDE
Installation & Operation
Instructions
Doppler Flow Meter
Model DFM 6.1
Manual Series A.1
Note: This page has been left blank intentionally.
DFM 6.1 Doppler Flow Meter
INDEX
CONNECTIONS ................................................................................................................ 4
KEYPAD SYSTEM ............................................................................................................ 6
CALIBRATION MENU ..................................................................................................... 7
ICONS ................................................................................................................................. 8
MESSAGE ICON ............................................................................................................... 9
STATUS ............................................................................................................................. 9
PASSWORD ..................................................................................................................... 10
MENU SELECTIONS ...................................................................................................... 10
UNITS/MODE .................................................................................................................. 11
CALIBRATION................................................................................................................ 12
RELAY PARAMETERS .................................................................................................. 13
DATA LOGGING ............................................................................................................ 14
COMMUNICATION (OPTIONAL) ................................................................................ 16
SPECIAL FUNCTIONS ................................................................................................... 18
SENSOR MOUNTING ..................................................................................................... 21
ENCLOSURE INSTALLATION ..................................................................................... 25
FIELD TROUBLESHOOTING ....................................................................................... 26
COMMON QUESTIONS AND ANSWERS ................................................................... 29
APPLICATIONS HOTLINE ............................................................................................ 31
PRODUCT RETURN PROCEDURE .............................................................................. 31
OPTIONS .......................................................................................................................... 33
MODBUS® COMMUNICATION ................................................................................... 39
HART® COMMUNICATION ......................................................................................... 50
SPECIFICATIONS ........................................................................................................... 62
PIPE CHARTS .................................................................................................................. 64
IMPORTANT NOTE: This instrument is manufactured and calibrated to meet product specifications.
Please read this manual carefully before installation and operation. Any unauthorized repairs or
modifications may result in a suspension of the warranty.
If this product is not used as specified by the manufacturer, protection may be impaired.
Available in Adobe Acrobat pdf format
Page 3
DFM 6.1 Doppler Flow Meter
CONNECTIONS:
POWER INPUT: The standard model requires AC power input between 100 to 240 VAC 50/60Hz. No
adjustments are necessary for voltages within this range. Connect L (Live) N (Neutral) and AC Ground.
Optional DC input model requires 9-32 VDC/10 Watts. Connect to + and - terminals.
Optional Thermostat and Heater modules are available rated for 115 VAC or 230 VAC.
IMPORTANT NOTE: To comply with CSA/UL electrical safety standards, AC power input and relay
connection wires must have conduit entry to the instrument enclosure. Installation requires a switch,
overcurrent fuse or circuit breaker in the building (in close proximity to the equipment) that is marked
as the disconnect switch.
Risk of electric shock. Loosen cover screw to access connections. Only qualified personnel
!
should access connections.
Note: Use of instrumentation over 40°C ambient requires special field wiring.
Page 4
CONNECTIONS
SERIAL COMMUNICATION OPTION
DFM 6.1 Doppler Flow Meter
SENSOR
RCVR
GND
GND
TMTR
+G
RS-485
Output
EXTRA RELAYS OPTION
4-20mA
RLY2
RLY1
–
+
NO
C
NC
NO
C
NC
NCCNONCCNONCCNONCC
RLY3 RLY4 RLY5 RLY6
AC
POWER
INPUT
L N
HEATER OPTION
AC
GND
NO
SENSOR
GND
Page 5
DFM 6.1 Doppler Flow Meter
KEYPAD SYSTEM
The diagram on page 7 shows the DFM 6.1 menu system. Arrows show the four directions to leave a
menu box. Pressing a corresponding keypad arrow will move to the next item in the direction shown.
Move the cursor (highlighted) under numerals and increase or decrease numerals with the and
keys.
To store calibration values permanently (even through power interruptions), press the button.
Page 6
CALIBRATION MENU
--Messages----------
Sensor Good
L Data
og Logging
d Log Use
0.00000 %
DFM 6.1 Doppler Flow Meter
--Units/Mode------- Mode Flow
Linear in
Volume USG
Multiplier x1
Velocity ft/s
Flow USG/m
--Calibration------ Mode Flow
20mA 2500.0 USG/m
4mA 0.000 USG/m
Pipe ID 12.00in
Min Flow 0.00 USG/m
Signal Cutoff 10%
Damping 0%
Cal Constant 1.000
--Relay Parameters-Relay 1
Function Flow
On 1000 USG
Off 0.000 USG
1
/m
/m
--24 hr log---------Date Feb. 12/20 10
Total
Average
Maximum
Max Time
Minimum
Min Time
50138 USG
34.82 USG/m
52.20 USG/m
11:08:00
0.000 USG/m
9:15:00
* Menu only appears if "New Password" has been
changed from 0000 in "Special Functions" menu.
Tot 20130.8 USG
Relays 1 2 3 4 5 6
--Status-----------Velocity 0.00ft/s
Flow 0.00 USG/M
Min Flow 0.00USG/M
Signal Strength 0%
Signal Cutoff 10%
OPTIONAL FEATURES
0.000
USG/m
*
--Password----------
Password 0000
--Menu-------------Units / Mode
Calibration
Relay Parameters
Data Logging
Communication
Special Functions
Simulation
Configuration
--Data Logging------Log Site ID 0
Mode Flow
File Format .LG2
Date May 18/2018
Time 11:27:40
Interval 10sec
Data Log Logging
--Communication-----
Protocol Modbus
Address 001
BPS 9600
Parity Even
Stop Bits 1
--Special FunctionsLanguage English
Analog Out 4-20mA
Backlight High
Reset Totalizer NO
Neg. Totals No
Rev. Flow Off
Capture WF No
Restore Defaults No
New Password 0000
--Simulation--------
Test Actual
Flow /m
Relays 1 2 3 4 5 6
--Configuration---- Serial# 12345
Utility 2 0.51.2 .
Doppler 1. 6.11
CommBoard 1.18.0
Relays
Analog Out 1
250USG
Flow 4-20mA
5.60
6
Page 7
ICONS
DFM 6.1 Doppler Flow Meter
1. 2.
1.
1.
2.
2. 3.
4.
Message waiting. Press .Ç
Data logging .off
Data logging .on
USB file download.
File download completed.
Download Error.
Page 8
DFM 6.1 Doppler Flow Meter
USG/m
0.000
Tot 20130.8 USG
Relays 1 2
--Messages----------
Sensor Good
--Status-----------Velocity 0.00ft/s
Flow 0.00 USG/m
Min Flow 0.00USG/m
Signal Strength 0%
Signal Cutoff 10%
og Logging
L Data
d Log Use
0.00000 %
MAIN DISPLAY
The main display shows the units selected from the Units/Mode menu, flow or
velocity rate being measured, totalizer and relay states. The DFM 6.1 will start-up
with this display.
MESSAGE ICON
Press from the main display to view status of the data logger and error/warning
messages provided by the instrument. The Message Icon will appear on the main
display if error messages are being generated by the instrument. Press to return
to the main display.
STATUS
Press from the main display to view instrument status. Velocity will be
displayed in ft/sec or m/sec.
Velocity
Displays the measured flow velocity in units selected in
the Units/Mode menu.
Flow
Displays the measured flow rate in units selected in the
Units/Mode menu.
Min Flow
Displays the minimum flow rate setting. This value is
read-only. The Min Flow can be changed in the
Calibration programming menu. A measured Flow
value below the Min Flow value will display as 0 flow
on the meter’s LCD display.
Signal
Strength
Displays the strength of the received Doppler signal on
a 0-100% scale.
Signal Cutoff
Displays the signal cutoff. This value is read-only. The
Signal Cutoff can be changed in the Calibration
programming menu. If Signal Strength is less than
Signal Cutoff, the meter will report 0 velocity and flow
on the LCD display. Setting may need to be adjusted in
the case of unstable flow near zero, or when high levels
of industrial noise are present.
Page 9
DFM 6.1 Doppler Flow Meter
--24 hr log---------Date Feb. 12/2010
}
Total 50138 USG
Average 34.82 USG/m
Maximum 52.20 USG/m
Max Time 11:08:00
Minimum 0.000 USG/m
Min Time 9:15:00
--Password----------
Password 0000
--Menu-------------Units / Mode
Calibration
Relay Parameters
Data Logging
Communication
Special Functions
Simulation
Configuration
24 HR LOG (Data Logging option only)
Press from the main display to view a formatted flow report from instruments
with a built-in data logger. Press to scroll down one day or repeatedly to scroll
to a specific date. Up to 365 days can be stored. Newest date will overwrite the
oldest. Press to return to the main display.
PASSWORD
The Password (a number from 0000 to 9999) prevents unauthorized access to the
Calibration menu.
From the Main Display press the key to get to
password is 0000 and if it has not been changed, this screen will be bypassed
Password. Factory default
completely.
A new password can be stored by going to the
Password
menu.
Special Functions New
If a user password is required, press to place the cursor under the first digit and
or to set the number, then to the second digit, etc. Press or to proceed
to the Menu Selections screen.
MENU SELECTIONS
The Menu selections page is used to navigate to specific menus which are
described in more detail on the following pages.
Press or to navigate to different menus, and to enter the selected menu.
Page 10
m
DFM 6.1 Doppler Flow Meter
--Units/Mode-------Mode Flow
Linear in
Volume USG
Multiplier x1
Velocity ft/s
Flow USG/m
UNITS/MODE
At
Mode, press the and then the or to select Flow or Velocity. Flow
mode displays the flow rate in engineering units (e.g. gpm, litres/sec, etc.) Press
the to store your selection then the to the next menu item.
At
Linear press the key and then the or to select your units of
measurement. The Linear units define what units the pipe dimensions and sensor
spacing will be displayed in. Typically inches or mm is selected. Press the to
store your selection then the to the next menu ite
.
At
Volume, press the and then the or to select units for volume. Note:
“bbl” denotes US oil barrels. Press the to store your selection then the to the
next menu item.
At
Multiplier, press the and then the or to select the totalizer
multiplier. Multipliers are used when resolution down to single digit is not
required, or when you don’t want to convert from gallons to thousands of gallons,
as an example. Press to store your selection then to the next menu item.
At
Velocity, press the and then the or to select the engineering
units for flow velocity and sonic velocity of the fluid. Press to store your
selection then to the next menu item.
At
Flow, press the and then the or to select the engineering units for
flow rate. Press to store your selection then to the next menu item.
Available Flow Rate Engineering Units:
Abbreviation Description Abbreviation Description
USG/d US gallons per day L/d liters per day
USG/h US gallons per hour L/h liters per hour
USG/m US gallons per minute L/m liters per minute
USG/s US gallons per second L/s liters per second
ft3/d cubic feet per day m3/d cubic meters per day
ft3/h cubic feet per hour m3/h cubic meters per hour
ft3/m cubic feet per minute m3/m cubic meters per minute
ft3/s cubic feet per second m3/s cubic meters per second
bbl/d barrels per day (1 bbl = 42 USG) IG/d Imperial gallons per day
bbl/h barrels per hour (1 bbl = 42 USG) IG/d Imperial gallons per day
bbl/m barrels per minute (1 bbl = 42 USG) IG/d Imperial gallons per day
bbl/d barrels per second (1 bbl = 42 USG) IG/d Imperial gallons per day
USMG/d US million gallons per day IMG/d Imperial million gallons per day
USMG/h US million gallons per hour IMG/h Imperial million gallons per hour
USMG/m US million gallons per minute IMG/m Imperial million gallons per minute
USMG/s US million gallons per second IMG/s Imperial million gallons per second
Page 11
DFM 6.1 Doppler Flow Meter
--Calibration-------
Mode Flow
20mA 500 USG/m
4mA 0 USG/m
Pipe ID 4.03 in
Min Flow
Signal Cutoff 10%
Damping 10%
Cal Constant 1.000
5.00 USG/m
CALIBRATION
Press or to position curser at Calibration menu, and to enter. Use or
to position cursor before each menu item and to enter. When settings are
completed press to store and again to return to the Main Menu.
20mA
(5V)
Press then or to change the numbers and decimal
point. Use this menu to set the corresponding flow rate
that will be represented by 20mA analog output. If
maximum flow is unknown, enter an estimated flow rate
and observe actual flow to determine the correct
maximum value. Any velocity or flow rate up to +40
ft/sec (12.2 m/sec) may be selected.
4mA
(0V)
Press or to set the flow rate corresponding to 4mA
analog output. This setting may be left at zero flow (or
velocity or can be raised to any value less than the 20mA
setting, or lowered to any velocity or corresponding flow
rate down to -40 ft/sec
(-12.2 m/sec).
Pipe ID
Place the cursor under the digits and then or to
change the numbers and decimal point.
Pipe ID
should be entered as the exact inside diameter of the pipe
where the sensor is mounted. Refer to the Pipe Charts
Appendix in this manual for inside diameter of common
pipe types and sizes.
Min Flow
Press and enter a minimum flow cutoff. Forward and
reverse flows less than
Min Flow will be forced to
zero.
Signal
Cutoff
Adjust the setting in percent to suppress flow readings at
zero flow when fluid swirling or pipe vibration may
cause the instrument to continue reading. Example:
Signal Cutoff at 5% will force the display and outputs to
zero when signal strength drops below 5%.
Damping
Increase damping to stabilize readings under turbulent
flow conditions. Decrease for fast response to small
changes in flow. Damping is shown in percentage
(maximum is 99%). Factory default is 10%.
Cal Constant
Scales the velocity reading. Factory value is close to
1.000 for a SE4-A sensor.
Press to return to Menu Selections screen.
Page 12
DFM 6.1 Doppler Flow Meter
--Relay Parameters--
Relay 1
Function Flow
On 1000 USG
Off 0.000 USG
/m
/m
RELAY PARAMETERS
Press or to position curser at Relay Parameters, and to enter. Use or
to position cursor before each menu item and to enter. When settings are
completed press to store and again to return to the Main Menu.
Relay
Press and or to select a corresponding relay number (2
relays are standard, 4 additional are optional).
Function
Press or to select Off, On, Pulse or Flow.
Flow
Highlight the numerals and press or to set digits to
On
the required relay
On set point.
Off set digits to the required Off set point.
Pulse
Press and set digits to the flow volume increment required
between relay pulses. Use this feature for remote samplers,
chlorinators or totalizers. Minimum time between pulses is
2.25 seconds and pulse duration is 350 milliseconds.
Return to
Relay and change settings for each relay
number.
Press to return to
Menu Selections.
ON
Sets relay in energized state.
Page 13
DFM 6.1 Doppler Flow Meter
--Data Logging-------
Log Site ID 0
Mode Flow
File Format .LG2
Date May 18/2018
Time 11:27:40
Interval 10sec
Data Log Stop
60min
30min
15min
10min
5min
2min
1min
30sec
Start
Delete
DATA LOGGING
Press or to position curser at Data Logging, and to enter. Use or to
position cursor before each menu item and to enter. When settings are
completed press to store and again to return to the Main Menu.
Log Site ID Enter a number from 00 to 99. The site ID will become part of
the downloaded file name to help distinguish downloads from
different instruments. Press to store the setting.
Mode Select Velocity (e.g. ft/sec or m/sec) or Flow (e.g. USGPM or
l/sec). Press to store the setting.
File Format Choose .LG2 to download data in .lg2 format for viewing on
Greyline Logger software. Choose .CSV to download data in
.csv format for import directly to Excel. This menu option can
be changed at any time without adversely affecting existing
data.
Date Press , and or to scroll and select Month, Day and
Year. Press to store the setting.
Time Press , and or to select the current time in Hours,
Minutes and Seconds. Press to store the setting.
Interval Press or to select the logging interval. Press to store
the setting. Greyline recommends choosing an interval which
will give you as much resolution as required and no more.
Choosing too often of an interval for what is required will
result in larger data files, which may take a long time to
download to USB. Reference page 15 for specific download
times. In critical installations, data should be downloaded
often.
Data Log Stop, Start or Delete the log file. Press or to select Delete
and to delete the log file. Press or to select Start and
to start the logger.
Important Note: You MUST Delete an old log and Start a new log AFTER
having made changes to Log Site ID, Mode, Date, Time and/or Interval for those
changes to be applied.
Important Note: Changing any of the parameters in the Units/Mode menu will
start a new log. It is recommended that you Delete and start a new log after
changing any Units/Mode settings.
Page 14
DFM__00A.LG2
DFM 6.1 Doppler Flow Meter
RETRIEVING LOG FILE
Plug a USB Flash Memory Drive (one is included with the DFM 6.1) into the
USB output port on the Panel of the meter. The instrument display will show the
data download icon until the log file is transferred to the memory card. The USB
flash drive may be removed when the icon for download successful appears.
Download file names will appear in this format:
or
DFM__00A.CSV
ODEL TAG DOWNLOAD
Tag is set according to the
Logging
Download letter will be A for the first download from an instrument. B for the
second, then C etc. At the letter Z a - character will appear indicating that the
maximum number of downloads for that instrument are on the USB flash drive.
Older files can be erased or moved from the flash memory drive or a new memory
drive can be used.
Note: Downloading files in .lg2 format will take approximately 35 seconds per
Downloading files in .csv format will take approximately 8 minutes per 1%
OPENING .LG2 FILES
Install Greyline Logger on your PC or laptop. Select File/Open/Instrument Log
(.log) to open the log file from your USB flash drive. Greyline Logger software is
available on Greyline’s website, www.greyline.com. Data can also be converted
to .CSV via Greyline Logger software.
OPENING .CSV FILES
Use a datasheet program such as Microsoft Excel® to import data in a comma
delimited format. Use Excel to manipulate or graph data.
menu.
1% of internal log memory used.
of internal log memory used.
Log Site ID entered in the instrument Data
Page 15
DFM 6.1 Doppler Flow Meter
--Communication-----
Protocol Modbus
Address 001
BPS 9600
Parity Even
Stop Bits 1
COMMUNICATION (Optional)
Press or to position curser at Communication, and to enter. Use or
to position cursor before each menu item and to enter. When settings are
completed press to store and again to return to the Main Menu.
MODBUS Protocol Information:
Transceiver: 2-wire, half-duplex
Data format: 8 Data Bits
Floating Point Byte Order: ABCD
Termination: Jumper JP1 selectable 120Ω resistor. TB1 & TB2 = OFF,
TB2 & TB3 = ON
Biasing: None
HART® (Highway Addressable Remote Transducer) Protocol Information:
HART Version: 7.0
Device
Description
Files:
DD files allow the user’s handheld HART communicator to
fully configure the DFM 6.1 Greyline provides DD files for
the Emerson 475 Communicator. The files are included in the
USB drive provided with your DFM 6.1 meter. You may also
request the files from Greyline by calling or emailing us at
info@greyline.com. Warning: The DFM 6.1 and associated
DDs are pending certification from the Fieldcomm Group.
Connections: HART Protocol uses a digital signal superimposed on the 4-
20mA output. When the 4-20mA output of the DFM 6.1 is
connected with a load resistor (230Ω to 600Ω), the HART
communicator can be connected on the loop in order to
communicate.
Protocol
Choose
MODBUS or HART.
Address
(Modbus)
Device address for the DFM. Valid range: 001-247 (Default:
001). This number should be unique across the bus. Press
or to scroll, to select digits, and press to store the
setting.
Page 16
DFM 6.1 Doppler Flow Meter
COMMUNICATION (Optional) cont.
BPS
(Modbus)
Parity
(Modbus)
Stop Bits
(Modbus)
Baud rate for the MODBUS communications. Press or
to select, and to store the setting. Options: 4800, 9600,
19200, 38400, 57600, 76800, and 115200 (Default: 9600).
Error checking parity for the MODBUS communications.
Press or to select, and to store the setting. Options:
None, Even, and Odd (Default: Even).
Press or to select, and to store the setting. Options: 1
or 2 (Default: 1).
Page 17
DFM 6.1 Doppler Flow Meter
--Special Functions-
Language English
Analog Out 4-20mA
Backlight High
Reset Totalizer NO
Neg. Totals No
Rev. Flow No
Capture WF No
Restore Defaults No
New Password 0000
--Special FunctionsLanguage English
}Backlight High
Medium
Low
Key Hi/Lo
Key High
Key Med
Key Low
Off
SPECIAL FUNCTIONS
Language
Analog Out
Backlight
Reset Totalizer
Neg. Totals
Rev. Flo
Capture WF
Restore Defaults
Page 18
Select
English, French or Spanish
Select 4-20mA or 0-5V mode for the analog
output.
Select
High, Medium or Low for
continuous backlight.
Select
minute after a keypress and then
Key Hi/Lo for high backlight for 1
Lo backlight until
a key is pressed again.
Select
Key High, Med or Low for
backlight for 1 minute after a keypress and then
backlight off until a key is pressed again.
Press and select
Yes to erase and restart the
totalizer at zero.
Select
deducted from the totalizer. Select
Yes to have reverse flow readings
No to totalize
forward flow only and ignore reverse flow.
Select
measurement. Select
direction measurement. Select
On to enable flow direction
Off to disable flow
Invert to
invert the sense of the flow measurement.
This function should only be used when instructed
by a Greyline representative to do so. The function
captures the ultrasonic signal so that it can be
evaluated by Greyline.
Select
process. After pressing
flash
until the message
Yes to start the waveform download
Yes , the screen will
Working for approximately 20 seconds,
Done appears. When Done
is on the screen, connect a flash drive to the USB
port on the front of the meter. The screen will flash
Saving for a couple seconds, and then return to
No . The waveform is now stored on your flash
drive and ready to be sent to Greyline.
Select
Yes and press to erase all user settings
and return the instrument to factory default
settings.
DFM 6.1 Doppler Flow Meter
SPECIAL FUNCTIONS (cont.)
New Password
Select any number from 0000 to 9999 and press .
Default setting of 0000 will allow direct access to
the calibration menus. Setting of any password
greater than 0000 will require the password to be
entered to access the calibration menus.
Press to return to
Menu Selections.
Page 19
DFM 6.1 Doppler Flow Meter
--Simulation--------
Test Actual
Flow /m
Relays 1 2 3 4 5 6
250USG
Flow 4-20mA
5.60
SIMULATION
Press or to position curser at Simulation, and to enter. Use or to
position cursor before each menu item and to enter. When settings are
completed press to store and again to return to the Main Menu.
Changes made in the Simulation menu exercise the 4-20mA output, digital display
and control relays.
Simulate a
Flow /Velocity reading. Press and then or to change
the simulated output. Press to begin simulation. The 4-20mA output and relay
states will be displayed on the screen below.
Press the to terminate simulation and return to the
screen.
Menu Selections
Page 20
DFM 6.1 Doppler Flow Meter
SENSOR MOUNTING LOCATION
The position of the sensor is one of the most important considerations for accurate flow measurement.
The same location guidelines apply to Doppler as most other types of flow meters.
VERTICAL OR HORIZONTAL PIPE - Vertical pipe
runs generally provide evenly distributed flow. On
12 O'CLOCK POSITION WITH
LOW GAS CONTENT
Horizontal pipes and liquids with high concentrations
of gas or solids, the sensor should be mounted on the
side (3 or 9 o’clock position) to avoid concentrations of
gas at the top of the pipe, or solids at the bottom. For
3O'CLOCKP OSITION WITH HIGH
GAS OR SOLIDS CONTENT
liquids with minimal gas bubbles (e.g. potable water)
the sensor should be mounted on the top of a horizontal
pipe (12 o’clock position) to obtain the best signal
HASEVENLY DISTRIBUT ED FLOW
VERTICAL PIPE USUALLY
strength.
STRAIGHT RUN REQUIREMENTS – For best
5 Dia
FLOW
10 Dia
results, the transducers must be installed on a straight
run of pipe, free of bends, tees, valves, transitions,
insertion probes and obstructions of any kind. For
most installations, ten straight unobstructed pipe
diameters upstream and five diameters
downstream of the transducers is the minimum
recommended distance for proper operation.
Additional considerations are outlined below.
• Do not, if possible, install the transducers downstream from a throttling valve, a mixing tank, the
discharge of a positive displacement pump or any other equipment that could possibly aerate the
liquid. The best location will be as free as possible from flow disturbances, vibration, sources of heat,
noise, or radiated energy.
• Avoid mounting the transducers on a section of pipe with any external scale. Remove all scale, rust,
loose paint, etc., from the location prior to mounting the transducers.
• Do not mount the transducers on a surface aberration (pipe seam, etc.).
• Do not mount transducers from different ultrasonic flow meters on the same pipe.
• Do not run the transducer triaxial cables in common bundles with cables from other instrumentation.
You can run these cables through a common conduit ONLY if they originate at the same flow meter.
• Never mount transducers under water.
IMPORTANT NOTE: In some cases, longer straight runs may be necessary where the transducers are
placed downstream from devices which cause unusual flow profile disruptions or swirl. For example:
modulating valves, or two elbows in close proximity and out of plane.
Page 21
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