Pulsar DFM 6.1 User manual

PULSAR MEASUREMENT
Revision 4.0
DFM 6.1
Instruction Manual

2
Note: This page has been left blank intentionally.

PULSAR MEASUREMENT
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CONTENTS
EU DECLARATION OF CONFORMITY ....................................................................................................................................................... 4
CONNECTIONS ................................................................................................................................................................................................. 5
HAZARDOUS AREA WIRING INSTRUCTIONS ....................................................................................................................................... 7
KEYPAD SYSTEM ............................................................................................................................................................................................... 8
CALIBRATION MENU ...................................................................................................................................................................................... 9
ICONS ................................................................................................................................................................................................................. 10
MAIN DISPLAY................................................................................................................................................................................................. 11
MESSAGE ICON ............................................................................................................................................................................................... 11
STATUS ............................................................................................................................................................................................................... 11
PASSWORD ....................................................................................................................................................................................................... 12
MENU SELECTIONS ....................................................................................................................................................................................... 12
UNITS/MODE ................................................................................................................................................................................................... 13
CALIBRATION ................................................................................................................................................................................................... 15
RELAY PARAMETERS ..................................................................................................................................................................................... 17
DATA LOGGING .............................................................................................................................................................................................. 18
COMMUNICATION (Optional) .................................................................................................................................................................. 20
SPECIAL FUNCTIONS .................................................................................................................................................................................... 22
SENSOR MOUNTING LOCATION ............................................................................................................................................................. 25
ENCLOSURE INSTALLATION ...................................................................................................................................................................... 29
FIELD TROUBLESHOOTING ........................................................................................................................................................................ 30
COMMON QUESTIONS AND ANSWERS .............................................................................................................................................. 33
APPLICATIONS HOTLINE ............................................................................................................................................................................. 35
PRODUCT RETURN PROCEDURE ............................................................................................................................................................. 35
OPTIONS ............................................................................................................................................................................................................ 37
MODBUS® COMMUNICATION ............................................................................................................................................................... 41
HART® COMMUNICATION ....................................................................................................................................................................... 52
APPENDIX A – Classified Area Installation Control Drawings ...................................................................................................... 64
APPENDIX B – Specifications ..................................................................................................................................................................... 67
APPENDIX D – Pipe Charts ......................................................................................................................................................................... 69
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.

DFM 6.1 INSTRUCTION MANUAL
4
Available in Adobe Acrobat pdf format
EU DECLARATION OF CONFORMITY
EU Declaration of Conformity – Pulsar Measurement DFM 6.1 Transit-Time Flow Meter
This declaration of conformity is issues under the sole responsibility of the manufacturer.
Relevant Directive(s) 2014/30/EU – EMC directive and its amending directives
2014/35/EU – Low Voltage directive and its amending directives
2014/34/EU – ATEX directive and its amending directives
2011/65/EU – RoHS directive and its amending directives
Manufacturer’s name Pulsar Measurement
Manufacturer’s address 16456 Sixsmith Drive
Long Sault,
ON K0C 1P0
Canada
Apparatus Doppler flow meter including wall-mount electronics, transducer
cables, and transducer
Models DFM 6.1 with SE4-A transducers (ATEX where approved)
Type of equipment Measurement and process control
Standards applied EN 61326-1:2013 EMC, equipment class industrial
EN 61010-1:2010+A1:2019 Safety requirements for electrical equipment
for measurement, control, and laboratory use
EN IEC 60079-0:2018 ATEX general requirements
EN 60079-11:2021 ATEX intrinsic safety (Ex ia)
Notified body CSA Group Netherlands B.V. #2813
Role Certifier of ATEX type examination
CSANe 22ATEX1057X
I declare that the apparatus named above has been tested and complies with the relevant sections of the above
referenced standards & directives.
Signed: Date: November 16, 2022
Rev. 1.0
Name & function Ken Elander, Sr Product
Manager
Pulsar Measurement

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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.
QUICK BENCH TEST
Connect Sensor as shown on next page, then Power. Test operation of the DFM 6.1 by holding the sensor in one
hand and rubbing your thumb or fingers briskly across the face (plastic surface) of the sensor. Allow 15 seconds
for the DFM 6.1 to process the signal and display a flow value.

DFM 6.1 INSTRUCTION MANUAL
6
CONNECTIONS
AC
L N
NO
C
NC
NO
C
NC
–
+
4-20mA
RLY2
RLY1
NC C NO NC C NO NC C NO NC C NO
RLY3 RLY4 RLY5 RLY6
EXTRA RELAYS OPTION
POWER
INPUT
HEATER OPTION
SENSOR
GND
SERIAL COMMUNICATION OPTION
AC
GND
SENSOR
RCVR GND GND TMTR
RS-485
Output
+ G

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HAZARDOUS AREA WIRING INSTRUCTIONS
The SE4-A transducer comes certified for use in the following hazardous locations. Please visit our website for
copies of the approval letters from the certifying agencies.
Individual copies of the specific control drawings for proper installation are also available for download on the
website, included with the shipment of each meter as a stand-alone document, and located within this manual in
Appendix A.
Standard:
 CSA C/US Non-Incendive for Class I, Div 2, Groups A, B, C, D
Optional with Intrinsic Safety Barriers:
 CSA C/US Intrinsically safe for Class I, Div 1, Groups C,D; Class II, Div 1, Groups E,F,G; Class III; Encl. Type 4
or
 ATEX/IECEx Zone 0, Ex ia IIB T4 Ga
When using optional intrinsic safety barriers, follow the instructions in the control drawing for proper adherence
to the conditions of acceptability. When the intrinsic safety barrier option is purchased with the DFM 6.1, the
proper barriers come pre-installed inside the DFM 6.1 electronics housing.

DFM 6.1 INSTRUCTION MANUAL
8
KEYPAD SYSTEM
The diagram on the next page 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.

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CALIBRATION MENU
- - Pa s s wo r d - - - - - - - - - -
Pa s s wo r d 0 0 0 0
- - Me s s a g e s - - - - - - - - - -
L Da t a og Loggi ng
d L o g Us e 0. 00000 %
Se n s o r Goo d
--Status------------
Ve l o c i t y 0 . 0 0 f t / s
Fl o w 0 . 0 0 USG/ M
Mi n Fl o w 0 . 0 0 USG/ M
Si g n a l 0 %
Si g n a l Cu t o f f 1 0 %
--Menu--------------
Un i t s / Mo d e
Ca l i b r a t i o n
Re l a y Pa r a me t e r s
Da t a L o g g i n g
Co mmu n i c a t i o n
Sp e c i a l Fu n c t i o n s
Si mu l a t i o n
Co n f i g u r a t i o n
OPTIONAL FEATURES
- - 2 4 h r l o g - - - - - - - - - -
Da t e F e b . 1 2 / 2 01 0
5 0 1 3 8 USG To t a l
3 4 . 8 2 USG/ m Av e r a g e
5 2 . 2 0 USG/ m Ma x i mu m
1 1 : 0 8 : 0 0 Ma x T i me
0 . 0 0 0 USG/ m Mi n i mu m
9 : 1 5 : 0 0 Mi n Ti me
USG/ m
T o t 2 0 1 3 0 USG
Re l a y s 1 2 3 4 5 6
0.00
*
* Menu only appears if "New Password" has been
changed from 0000 in "Special Functions" menu.
- - Da t a L o g g i n g - - - - - - -
L o g Si t e I D 0
Mo d e Fl o w
Fi l e F o r ma t . L G2
Da t e Ma y 1 8 / 2 0 1 8
Ti me 1 1 : 2 7 : 4 0
I n t e r v a l 1 0 s e c
Da t a L o g L o g g i n g
- - Re l a y Pa r a me t e r s - -
Re l a y 1
Fu n c t i o n F l o w
/ m On 1 0 0 0 USG
/ m Of f 0 . 0 0 0 USG
- - Si mu l a t i o n - - - - - - - -
 T e s t Ac t u a l
Fl o w / m 2 5 0 USG
F l o w 4 - 2 0 mA 5 . 6 0
Re l a y s 1 2 3 4 5 6
- - Co n f i g u r a t i o n - - - - -
Se r i a l # 1 2 3 4 5
Ut i l i t y 6 2 . 1 41 . 2 .
Do p p l e r 1 . 3 8 . 1
Co mmBo a r d 1 . 2 2 . 1 0
6 Re l a y s
An a l o g Ou t 1
- - Co mmu n i c a t i o n - - - - -
Pr o t o c o l Mo d b u s
Ad d r e s s 0 0 1
BPS 9 6 0 0
Pa r i t y Ev e n
St o p Bi t s 1
- - Ca l i b r a t i o n - - - - - - -
Mo d e Fl o w
2 0 mA 5 0 0 USG/ m
4 mA 0 USG/ m
5 . 0 0 USG/ m Mi n F l o w
Si g n a l Cu t o f f 1 0 %
Da mp i n g
Mo d e F I R
Pe r c e n t 1 0 %
Wi n d o w 1 . 0 f t / s
Pi p e I D 4 . 0 3 i n
Ca l Co n s t a n t 1 . 0 0 0
- - Sp e c i a l Fu n c t i o n s -
Language Engl i sh
An a l o g Ou t 4 - 2 0 mA
Ba c k l i g h t Hi g h
Re s e t To t a l i z e r NO
Ne g . T o t a l s No
Re v . Fl o w Of f
Ca p t u r e Pa r No
Ca p t u r e WF No
Re s t o r e De f a u l t s No
Ne w P a s s wo r d 0 0 0 0
- - Un i t s / Mo d e - - - - - - - -
Mo d e Fl o w
L i n e a r i n
Vo l u me USG
Mu l t i p l i e r x 1
De c i ma l 0 s
Ve l o c i t y f t / s
F l o w USG/ m
De c i ma l 2 s

 



DFM 6.1 INSTRUCTION MANUAL
10
ICONS
1. 2. Message waiting. Press .
Data logging .off
1. 2. Data logging .on
1. 2. 3. 4. USB file download.
File download completed.
Download Error.

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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.
Sensor Displays the status of the sensor hardware. Even with the
sensor disconnected or shorted, the DFM will display
Good. To check sensor integrity, use the sensor resistance
test procedure on page 28. If HardwareFault is detected,
navigate to the Configuration page in the Main Menu to
determine which circuit board is not communicating.
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 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.
USG/ m
T o t 2 0 1 3 0 USG
Re l a y s 1 2 3 4 5 6
0.00
- - Me s s a g e s - - - - - - - - - -
L Da t a og Loggi ng
d L o g Us e 0 . 0 0 0 0 0 %
Se n s o r Go o d
- - St a t u s - - - - - - - - - - - -
Ve l o c i t y 0 . 0 0 f t / s
Fl o w 0 . 0 0 USG/ m
Mi n F l o w 0 . 0 0 USG/ m
Si g n a l 0 %
Si g n a l Cu t o f f
1 0 %

DFM 6.1 INSTRUCTION MANUAL
12
24 HR LOG
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.
IMPORTANT: Inserting a USB drive into the meter while on this screen will
transfer 24 HR Log data to the USB drive in .csv format.
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. Factory default
password is 0000 and if it has not been changed, this screen will be bypassed
completely.
A new password can be stored by going to the Special Functions New
Password menu.
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.
- - Me n u - - - - - - - - - - - - - -
Un i t s / Mo d e
Ca l i b r a t i o n
Re l a y Pa r a me t e r s
Da t a L o g g i n g
Co mmu n i c a t i o n
Sp e c i a l F u n c t i o n s
Si mu l a t i o n
Co n f i g u r a t i o n

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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 item.
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 Decimals (Volume), press the  and then the  or  to select the number
of decimal points to be present on the totalizer display on the LCD screen.
Default = 0. Options = 0, 1, 2. Press the  to store your selection then the 
to the next menu item.
At Velocity, press the  and then the  or  to select the engineering
units for flow velocity. Press  to store your selection then  to the next
menu item.
- - Un i t s / Mo d e - - - - - - - -
Mo d e Fl o w
L i n e a r i n
Vo l u me USG
Mu l t i p l i e r x 1
De c i ma l 0 s
Ve l o c i t y f t / s
F l o w USG/ m
De c i ma l 2 s

DFM 6.1 INSTRUCTION MANUAL
14
UNITS/MODE (cont.)
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)
gal)
IG/d Imperial gallons per day
bbl/d barrels per second (1 bbl = 42 USG)
gal)
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
At Decimals (Flow), press the  and then the  or  to select the number of
decimal points to be present on the flow rate display on the LCD screen.
Default = 2. Options = 0, 1, 2. Press the  to store your selection then the 
to the next menu item.
- - Un i t s / Mo d e - - - - - - - -
Mo d e Fl o w
L i n e a r i n
Vo l u me USG
Mu l t i p l i e r x 1
De c i ma l 0 s
Ve l o c i t y f t / s
F l o w USG/ m
De c i ma l 2 s

PULSAR MEASUREMENT
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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).
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%.
LOS Time
Selectable from 0-99 seconds, default of 10, the LOS
Time controls how long the Signal Strength must be
below the Signal Cutoff before the reading on the DFM
6.1 goes to zero. This parameter is used to suppress
sudden losses of signal which might be caused by a
partially empty pipe, or cleaner fluids flowing by the
sensor.
- - Ca l i b r a t i o n - - - - - - -
Mo d e Fl o w
2 0 mA 5 0 0 USG/ m
4 mA 0 USG/ m
M 5 . 0 0 USG/ mi n F l o w
Si g n a l Cu t o f f
1 0 %
Da mp i n g
Mo d e FI R
Pe r c e n t 1 0 %
Wi n d o w 1 . 0 f t / s
Pi p e I D 4 . 0 3 i n
Ca l Co n s t a n t 1 . 0 0 0

DFM 6.1 INSTRUCTION MANUAL
16
CALIBRATION (cont.)
Damping
Choose between OFF, FIR (Default), or LOW PASS.
Mode When measured flows are outside the Window of the
running average, the FIR filter will reduce the damping
average so that a fast response can be made to the
sudden change in flow rate.
The LOW PASS filter will ignore measured flow rates
outside the Window, while holding the running average,
until there are enough data points outside the Window
to cause a step-response to the new measured value.
While measured flows are within the Window of the
running average, both the FIR and LOW PASS filter
behave the same.
Percent Higher percentages increase the number of
measurements which are averaged together to produce
a stable flow reading. Higher percentages also increase
the time it takes for the meter to make a step-response
to the measured flow rate outside the Window in the
LOW PASS Mode.
Window Defines the Window around the running average, in
units of Velocity set in the Units/Mode menu.
Measurements made inside the Window are added to
the running average, and measurements outside the
Window effect the response of the meter as described
in the Mode section.
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.
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.
- - Ca l i b r a t i o n - - - - - - -
Mo d e Fl o w
2 0 mA 5 0 0 USG/ m
4 mA 0 USG/ m
M 5 . 0 0 USG/ mi n F l o w
Si g n a l Cu t o f f
1 0 %
Da mp i n g
Mo d e FI R
Pe r c e n t 1 0 %
Wi n d o w 1 . 0 f t / s
Pi p e I D 4 . 0 3 i n
Ca l Co n s t a n t 1 . 0 0 0

PULSAR MEASUREMENT
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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 On Highlight the numerals and press  or  to set
digits to the required relay On set point.
Off set digits to the required Off set point.
Direction When flow is in the positive direction, the relay will be
disengaged, when flow is negative, the relay engages.
Note: Rev. Flow in the Special Functions menu must be
ON or INVERT for this to work properly.
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.
- - Re l a y Pa r a me t e r s - -
Re l a y 1
F u n c t i o n Fl o w
/ m On 1 0 0 0 USG
/ m Of f 0 . 0 0 0 USG

DFM 6.1 INSTRUCTION MANUAL
18
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. Pulsar Measurement 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.
- - Da t a L o g g i n g - - - - - - -
L o g Si t e I D 0
Mo d e F l o w
Fi l e F o r ma t . L G2
Da t e Ma y 1 8 / 2 0 1 8
Ti me 1 1 : 2 7 : 4 0
I n t e r v a l 1 0 s e c
6 0 mi n
3 0 mi n
1 5 mi n
1 0 mi n
5 mi n
2 mi n
1 mi n
3 0 s e c
Da t a L o g St o p
St a r t
De l e t e

PULSAR MEASUREMENT
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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:
Tag is set according to the Log Site ID entered in the instrument Data
Logging menu.
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 1% of internal log memory used.
Downloading files in .csv format will take approximately 8 minutes per
1% of internal log memory used.
OPENING .LG2 FILES
Install Greyline Logger Software 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 for download on the Pulsar
Measurement website, www.pulsarmeasurement.com/downloads. 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.
DFM_ _ 0 0 A. L G2
or
DFM_ _ 0 0 A. CSV
MODEL
TAG
DOWNLOAD

DFM 6.1 INSTRUCTION MANUAL
20
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 Pulsar Measurement
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
Pulsar Measurement by calling or emailing us at
[e-mail].
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.