lanry DF6100-EC Manual

DF6100-EC
Doppler Ultrasonic Flow Meter
Clamp-on
Operation & maintenance
Manual
REV 4/2017

Doppler Ultrasonic Flowmeter DF6100 Manual
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Our CONTENTS
0B0B0B0PART 1 INTRODUCTIONS .............................................................................................................................................3
6B6B6B6B1.1 PRINCIPLE............................................................................................................................................................3
7B1.2 APPLICATION ......................................................................................................................................................3
8B1.3 NOTES FOR APPLICATION................................................................................................................................4
9B7B7B7B1.4 TECHNICAL SPECIFICATIONS .........................................................................................................................4
26B1.4.1 TRANSMITTER................................................................................................................................4
27B1.4.2 TRANSDUCER .................................................................................................................................4
PART 2 TRANSMITTER MOUNTING AND WIRING..................................................................................................5
10B8B8B8B2.1 MOUNTING LOCATION .....................................................................................................................................5
11B9B9B9B2.2 TRANSMITTER WIRINGS..................................................................................................................................6
28B2.2.1 Transducer Wiring Connections .........................................................................................................7
29B2.2.2 Power Supply Wiring Connections.....................................................................................................7
30B2.2.3 4-20mA Output...................................................................................................................................7
31B2.2.4 Relay output .......................................................................................................................................8
2B2B2B2BPART 3 CLAMP-ON TRANSDUCER INSTALLATION................................................................................................9
11B9B9B9B3.1 TRANSDUCER MOUNTING LOCATION..........................................................................................................9
12B10B10B10B3.2 TRANSDUCER INSTALLATION PROCEDURES ...........................................................................................10
13B11B11B11B3.3 TRANSDUCER CABLES...................................................................................................................................10
14B12B12B12B3.4 COUPLANT.........................................................................................................................................................10
16B14B14B14B3.5 TRANSDUCER INSTALLATION......................................................................................................................11
3B3B3PART 4 INSTRUMENT PROGRAMMING...................................................................................................................11
20B18B18B18B4.1 GENERAL ...........................................................................................................................................................11
21B19B19B19B4.2 KEYPAD OPERATION.......................................................................................................................................11
40B4.2.1 List Item Selection Procedure........................................................................................................... 11
41B4.2.2 Numeric Value Entry Procedure.......................................................................................................12
22B20B20B20B4.3 MENU STRUTURE.............................................................................................................................................13
42B23B23B23B4.3.1 Totalizer Reset..................................................................................................................................13
43B24B24B24B4.3.2 Measurement UNIT Selection..........................................................................................................13
44B25B25B25B4.3.3 Pipe Inside Diameter ........................................................................................................................13
45B26B26B26B4.3.4 Flow Display Mode..........................................................................................................................13
46B27B27B27B4.3.5 Engineering Units RATE..................................................................................................................13
47B28B28B28B4.3.6 Engineering Units RATE INTERVAL..............................................................................................14
48B29B29B29B4.3.7 Engineering Units TOTALIZER ......................................................................................................14
49B30B30B30B4.3.8 Engineering Units TOTAL Exponent...............................................................................................15
50B31B31B31B4.3.9 Fluid Specific Gravity ......................................................................................................................15
51B32B32B32B4.3.10 Low Flow Cut-off...........................................................................................................................15
52B33B33B33B4.3.11 Scale Factor ....................................................................................................................................15
53B34B34B34B4.3.12 System Damping ............................................................................................................................16
54B35B35B35B4.3.13 CONFIGURE 4-20mA...................................................................................................................16
55B36B36B36B4.3.14 Dual Relay Configuration...............................................................................................................17
56B37B37B37B4.3.15 Change Password ...........................................................................................................................18
57B38B38B38B4.3.16 SERVICE mode..............................................................................................................................18
23B4.4 OPERATING INSTRUCTION............................................................................................................................20
PART 5 WARRANTYAND SERVICE........................................................................................................................21
24B21B21B21B5.1 WARRANTY .......................................................................................................................................................21
25B22B22B22B5.2 SERVICE..............................................................................................................................................................21
PART 6 APPENDIX........................................................................................................................................................21

Doppler Ultrasonic Flowmeter DF6100 Manual
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0B0B0B0PART 1 INTRODUCTIONS
6B6B6B6B1.1 PRINCIPLE
The Doppler ultrasonic flow meter is designed to measure volumetric flow of liquid within closed
conduit, the pipe line must be filled full of liquids, there must be a certain amount of air bubbles or
suspended solids in liquid.
Transducers are clamp-on or hot-tapped probe types, user don’t need to shut down the pipe flow
when install the clamp-on transducers.
The flow meter operates by transmitting an ultrasonic sound from its transmitting transducer, the
sound will be reflected by useful sonic reflectors suspended within the liquid and recorded by the
receiving transducer. If the sonic reflectors are moving within the sound transmission path, sound
waves will be reflected at a frequency shifted (Doppler frequency) from the transmitted frequency.
The shift in frequency will be directly related to the speed of the moving particle or bubble. This
shift in frequency is interpreted by the instrument and converted to various user defined measuring
units.
Fig 1.1
There must be some particles large enough to cause longitudinal reflection – particles larger than
100 micron.
When install the transducers, the installation location must have enough straight pipe length
upstream and downstream. Commonly, the upstream needs 10D and downstream needs 5D straight
pipe length, where D is pipe diameter.
7B1.2 APPLICATION
Raw sewage
Return activated sludge
Waste activated sludge
Ground water
Pulp and paper slurry
Chemical slurry
Drainage
Mining recirculation
Animal renderings

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8B1.3 NOTES FOR APPLICATION
When installing transducers, it need enough straight pipe;
When straight pipe is not enough, by setting menu SERVICE, the flowmeter will still get high
accuracy, and obtain a more accurate reading. more details, please see 4.3.16 SERVICE mode;
The measured liquid must contain a certain amount of air bubbles or suspended solids. When the
liquid contains air bubbles too much or too big, the bubbles occupy a certain volume, and then
lead to larger flowmeter reading. In this case, it needs to recalibrate the flowmeter.
When installing clamp-on transducers, the pipe material should have a good acoustical
conductivity;
When the transducer need be installed underground, recommend the insertion type.
9B7B7B7B1.4 TECHNICAL SPECIFICATIONS
TRANSMITTER
Measurement principle Doppler ultrasonic
Resolution 0.25mm/s
Repeatability 0.5% of reading
Accuracy 0.5% -- 2.0% F.S.
Response time 2-60s for optional
Flow Velocity Range 0.05- 12 m/s
Liquid Types Supported Liquids containing 100ppm of reflectors and at least 20% of the reflectors
are larger than 100 micron.
Power Supply AC: 85-265V DC: 24V/500mA
Enclosure type Wall-mounted
Degree of protection IP66 according to EN60529
Operating temperature -20℃to +60℃
Housing material Fiberglass
Measurement Channels 1
Display 2 line × 8 characters LCD, 8-digit rate or 8-digit total (resettable)
Units User Configured (English and Metric)
Rate Rate and Velocity Display
Totalized gallons, ft³, barrels, lbs, liters, m³,kg
Communication 4-20mA,relays for Totalizer and alarm output
keypad 6pcs buttons
Size 244(h)*196(w)*114(d)mm
Weight 2.4kg
TRANSDUCER
Transducers Type Clamp-on
Degree of protection IP65. IP67 or IP68 according to EN60529
Suited Liquid Temperature Std. Temp.: -35℃~85℃for short periods up to 120℃
High Temp.: -35℃~200℃for short periods up to 250℃
Pipe diameter range 40-4000 mm
Transducer Size 60(h)*34(w)*32(d)mm
Material of transducer Stainless steel
Cable Length Std: 10m

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PART 2 TRANSMITTER MOUNTINGAND WIRING
10B8B8B8B2.1 MOUNTING LOCATION
Mount the transmitter in a location that is:
zWhere little vibration exists
zProtected from falling corrosive fluids
zWithin ambient temperature limits -20 to +60°C
zOut of direct sunlight. Direct sunlight may increase transmitter temperature to above the
maximum limit
Fig 2.1 Fixed Transmitter
Mounting: Refer to Figure 2.2 in next page for fixed enclosure and mounting dimension details.

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Fig 2.2 Transmitter Mounting Dimensions
11B9B9B9B2.2 TRANSMITTER WIRINGS
Fig 2.3 Transmitter Wiring Diagram

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28B2.2.1 Transducer Wiring Connections
Fig 2.4 Transducer Cable
Please connect the Transducer A to Transmitter terminals “- +” TRANSMIT, red + to “+”, and black
“-” to “-”, and connect the Transducer B to terminals “- +” RECEIVE.
29B2.2.2 Power Supply Wiring Connections
For fixed flow meter, the power supply can be connected to 85-265VAC or 24VDC.
30B2.2.3 4-20mA Output
The 4-20mA Output interfaces with most recording and logging systems by transmitting an analog
current signal that is proportional to system flow rate.
The output load is up to 750 Ohms Max, internal power supply.
The circuit connection is shown as below:
Fig 2.5 4-20mA

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31B2.2.4 Relay output
Please refer to 4.3.14 Dual Relay Configuration to see Menu Configuration.
The relay operations are user configured via the front panel to act in flow rate alarm or error alarm,
power supply interruption alarm and totalizer pulse. The relays are rated for 350VDC load voltage
and have a load current of 0.12A.
Fig 2.6A shows a wiring diagram for totalizer pulse output connection, the wiring terminal is
“PULSE -, +” in main board shown as Fig 2.3.
Fig 2.6A Passive Source Pulse Output Fig2.6B Alarm for flow rate and power interruption
Fig 2.6B shows a wiring diagram for flow rate alarm, error alarm and transmitter power supply
interruption alarm output connections, the wiring terminal is “RELAY -, +” in main board shown as
Fig 2.5.
Note: Once the transmitter is powered on, the “RELAY -, +” output is normally closed state. The
transmitter power supply interruption alarm output is automatically output alarm, if the transmitter is
powered off, the “RELAY -, +” will automatically change normally closed state into normally open
state.

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2B2B2B2BPART 3 CLAMP-ON TRANSDUCER INSTALLATION
11B9B9B9B3.1 TRANSDUCER MOUNTING LOCATION
Placement of the ultrasonic transducer is the most critical step in achieving an accurate and reliable
flow reading. All flow meters of this type rely on a full-pipe of fluid that is flowing symmetrically
(evenly) in the pipe. Flow in partially filled pipes and immediately downstream of elbows, valves
and pumps are unstable and will lead to unstable readings and nonlinearity.
Select a transducer mounting location with adequate straight runs of pipe, both upstream and
downstream, to achieve stable readings. Examples of minimum upstream and downstream
requirements are included in Table 3.1
Table 3.1
The Doppler flow meter system will provide repeatable measurements on piping systems that do not
meet these requirements, but the accuracy may be influenced to various degrees.
Piping configuration And transducer
position
Upstream Dimension Downstream Dimension
Pipe Diameters（*）Pipe Diameters（**）
24 4
14 3
9 3
8 3
8 3
24 4

Doppler Ultrasonic Flowmeter DF6100 Manual
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12B10B10B10B3.2 TRANSDUCER INSTALLATION PROCEDURES
Locate the reference mounting positions of 3 and 9 o’clock (180° symmetrically) as shown in Fig 3.1.
Fig 3.1 Two transducers must be installed 180° symmetrically.
Two transducers called A and B transducer, A is transmitting transducer and B is receiving transducer,
they must be installed 180° symmetrically in order to have a more accurate measuring, shown as Fig
3.1.
All the transducers have a Serial Number corresponding to transmitter Serial Number.
13B11B11B11B3.3 TRANSDUCER CABLES
After the transducers A and B inserting into the pipe, the sensor cables should be routed to the
transmitter location. Verify that the supplied cable length is sufficient to meet the installation
requirements. While transducer cable extension is not generally recommended, if additional
transducer cable is required, utilize RG59 75 Ohm coaxial cable.
CAUTION: The cables are designed to carry low level signals that are developed by the sensor.
Care should be taken in routing the cables. Avoid running cables near sources of high voltage or
EMI/RFI. Also avoid routing the cables in cable tray configurations, unless the trays are specifically
used for other low voltage, low level signal cables.
14B12B12B12B3.4 COUPLANT
Assure an acoustically conductive path between the transducer face and the prepared piping surface,
a coupling compound is employed. Enclosed with the Doppler flow meter system is tube of Dow
Corning 111, silicone grease. This couplant is satisfactory for temporarily mounting the transducers
to the pipe. If the installation is long-term (more than a few days), we recommends utilizing a
silicone-based RTV such as Dow Corning RTV-732. If alternate couplant are utilized, the grease
chosen must berated to not flow at the temperature of the pipe.
Spread an even layer of coupling compound, approximately 1/8 inch [3mm] thick, to the prepared
transducer mounting areas of the pipe. Utilize Dow 111 for temporary mounting or Dow 732 for
permanent mounting.

Doppler Ultrasonic Flowmeter DF6100 Manual
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Mounting of high temperature transducers is similar to Doppler flow meter standard transducers.
High temperature installations require acoustic couplant Dow Corning 112 that is rated not to flow at
the temperature that will be present on the pipe surface.
16B14B14B14B3.5 TRANSDUCER INSTALLATION
1. Place each transducer under the strap with the flat face positioned towards the pipe. The notch on
the back of the transducer will provide a mounting surface for the strap. The transducer cables must
be facing in the same direction for proper operation.
NOTE: Large pipes may require two people for this procedure.
2. Tighten the strap tight enough to hold the transducers in place, but not so tight that all of the
couplant squeezes out of the gap between the transducer face and pipe. Ensure that the transducers
are squarely aligned on the pipe.
3. If the transducers are to be permanently mounted using Dow 732, the RTV must be UUUUcompletely
curedUUUU before proceeding to Instrument Start up. Ensure that no relative motion between the
transducer and pipe occurs during the 24 hour curing process. If
Dow 111 grease was used for temporary operation of the Doppler flow meter system, please proceed
with the Instrument Start-up procedures. Transducer Installation is complete.
3B3B3PART 4 INSTRUMENT PROGRAMMING
20B18B18B18B4.1 GENERAL
The Doppler flow meter contains a four-key tactile feedback keypad interface that allows the user to
view and change configuration parameters used by the Doppler flow meter operating system.
The Doppler flow meter allows two basic sets of programming procedures: list item selection and
numeric value entry.
21B19B19B19B4.2 KEYPAD OPERATION
Fig 4.1 Keyboard
40B4.2.1 List Item Selection Procedure
NOTE: If you are already in PROGRAM mode and the selection to be viewed or changed is already
displayed, proceed to step 3 below. If you are in PROGRAM mode and the selection to be viewed or
changed is not displayed, press the UP or DOWN arrow keys and repeat pressing until the desired
selection appears. Proceed to step 3.
1. Press MENU key, then ID UNIT appears on the lower line of the display.

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2. Press the DOWN arrow key to move to the desired selection.
3. Press ENTER to view the current selection.
4. If the current selection is desired, press ENTER to confirm. The unit will automatically advance
to the next selection.
5. If the current selection must change, press the UP arrow key and repeat pressing to scroll
through the available choices. Press ENTER to confirm your selection. The unit will
automatically advance to the next selection.
6. To exit programming mode, press the MENU key. Depending on your position in the
programming mode, up to three MENU key presses may be required to exit. The display will
change to RUN mode.
41B4.2.2 Numeric Value Entry Procedure
NOTE: If you are already in PROGRAM mode and the selection to be viewed or changed is already
displayed, proceed to step 3 below. If you are in PROGRAM mode and the selection to be viewed or
changed is not displayed, press the UP or DOWN arrow keys and repeat pressing until the desired
selection appears.
Proceed to step 3.
1. Press MENU key, then PROGRAM appears in the lower left-hand corner and ID UNITS appears
on the lower line of the display.
2. Press the DOWN arrow key until the desired selection displays. The current numeric value for this
selection appears on the upper line of the display.
3. If the current value is desired, press ENTER. The left most programmable number begins to flash.
Press ENTER again to confirm and keep the current numeric value. The unit will automatically
advance to the next menu selection.
4. If the current selection must be changed, press ENTER. The left most programmable number
begins to flash. Use the UP arrow key to scroll through the digits 0-9 and change the flashing digit
to the desired value. Use the DOWN arrow key to move the active digit to the right. Continue
using the UP and DOWN arrow keys until all digits are selected.
5. Press ENTER to confirm your selection. The unit will automatically advance to the next selection.
6. To exit programming mode, press the MENU key. Depending on your position in the
programming mode, up to three MENU key presses may be required to exit. The display will
change to RUN mode.

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22B20B20B20B4.3 MENU STRUTURE
42B23B23B23B4.3.1 Totalizer Reset
Press both the ENTER and the MENU keys when in the RUN mode to reset the totalizer. The
message TOTAL RST will be displayed for a few seconds to indicate that the totalizer had been
cleared. If a password has been set, the user must enter the correct password for the totalizer to be
cleared.
The following sections define accessible in the program mode.
43B24B24B24B4.3.2 Measurement UNIT Selection
ID UNIT
INCH
MM
Select unit of measure for pipe ID entry. The choices are either inches (English) or millimeters
(Metric) units.
44B25B25B25B4.3.3 Pipe Inside Diameter
PIPE ID – Pipe Inside Diameter Entry
According to ID UNIT, display ID INCH or ID MM. Enter the pipe inside diameter in inches if INCH
was selected in ID UNIT; in millimeters if MM was selected.
45B26B26B26B4.3.4 Flow Display Mode
DISPLAY – Display Mode Selection
RATE
TOTAL
BOTH
DIAG
To display only the Flow Rate, select RATE. To display only the Flow Total, select TOTAL. To
alternately display the Flow Rate and the Total, select BOTH. By selecting BOTH, the display will
switch between RATE and TOTAL every 7 seconds. The DIAG selection places the display in the
diagnostics mode. When selected, the display will show the measured frequency, the gain setting and
the signal strength.
46B27B27B27B4.3.5 Engineering Units RATE
RATE UNT – Engineering Units for Flow Rate
VEL FEET - Velocity in Linear Feet
VELMTRS-VelocityinLinearMeters

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GALLONS - U.S. Gallons
LITERS - Metric Liters
MGAL - Millions of U.S. Gallons
CUBIC FT - Cubic Feet
M CU FT - Millions of Cubic Feet
CUBIC ME - Cubic Meters
MEGLTRS - Millions of Metric Liters
ACREFT-AcreFeet
OIL BARR - Oil Barrels (42 U.S. Gallons)
LIQ BARR - Liquid Barrels (31.5 U.S. Gallons)
LBS-Pounds
KGS – Kilograms
Select a desired engineering unit for flow rate measurements. When Pounds (LBS) or Kilograms
(KGS) is selected, the specific gravity for the fluid type must be entered for the SP GRAV setup
parameter.
47B28B28B28B4.3.6 Engineering Units RATE INTERVAL
RATE INT – Time Interval for Flow Rate
MIN-Minutes
HOUR-Hours
DAY-Days
SEC-Seconds
Select a desired engineering unit for flow rate measurements.
48B29B29B29B4.3.7 Engineering Units TOTALIZER
TOTLUNT – Engineering Units for Flow Totalizer
GALLONS - U.S. Gallons
LITERS-MetricLiters
MGAL-MillionsofU.S.Gallons
CUBICFT-CubicFeet
MCUFT-MillionsofCubicFeet
CUBICME-CubicMeters
MEGLTRS-MillionsofMetricLiters
ACREFT-AcreFeet
OILBARR-OilBarrels(42U.S.Gallons)
LIQBARR-LiquidBarrels(31.5U.S.Gallons)
LBS-Pounds
KGS-Kilograms
Select a desired engineering unit for flow accumulator (totalizer) Measurements

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49B30B30B30B4.3.8 Engineering Units TOTAL Exponent
TOTL MUL – Flow Totalizer Multiplier
0.01 to 1,000,000
Utilize for setting the flow totalizer exponent. This feature is useful for accommodating a very large
accumulated flow. The exponent is a ×10n multiplier, where “n” can be from –2 (×0.01) to +6
(×1,000,000).
Exponent DisplayMultiplier
×PT01 ×0.01
×PT1 ×0.1
×1 ×1
×10 ×10
×100 ×100
×1000 ×1,000
×10000 × 10,000
×100000 ×100,000
×1000000 × 1,000,000
50B31B31B31B4.3.9 Fluid Specific Gravity
SP GRAV – Fluid Specific Gravity Entry
unitless
Allow adjustments to be made to the specific gravity (density) of the liquid. If Pounds (LBS) or
Kilograms (KGS) is selected for either the RATE UNT or the TOTL UNT, a specific gravity must be
entered for the correct mass flow to be calculated.
51B32B32B32B4.3.10 Low Flow Cut-off
FL C-OFF – Low Flow Cut-off A Low Flow Cut-off entry is provided to allow very low flow rates
(that can be present when pumps are off and valves are closed) to be displayed as Zero flow. The
value entered is in actual rate units.
When there is a reading display but no flow, please cut-off this value by “FL C-OFF”.
But the 4-20mA output will not be “cut-off”, it will be directly proportional to real flow value
though the low value had been cut-off.
52B33B33B33B4.3.11 Scale Factor
SCALE F – Scale Factor
This function can be used to make the Doppler flow meter system agree with a different or reference
flow meter, or to compensate for an installation where there is inadequate straight pipe to obtain a
laminar flow profile, by applying a correction factor/multiplier to the readings and outputs. The

Doppler Ultrasonic Flowmeter DF6100 Manual
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range of settings for this entry is 0.500 to 2.0. The following example describes using the SCALE F
entry.
The Doppler flow meter is indicating a flow rate that is 3.0% higher than another flow meter located
in the same pipe line. To make the Doppler flow meter indicate the same flow rate as the other meter,
enter a value of 0.970, to lower the readings by 3.0%.
53B34B34B34B4.3.12 System Damping
DAMPING – System Damping
0-99(Second)
Flow Filter Damping establishes a maximum adaptive filter value, the factory default setting is 10.
Under stable flow conditions (flow varies less than 10% of reading), this adaptive filter will increase
the number of successive flow readings that are averaged together up to this maximum value. If flow
changes outside of the 10% window, the Flow Filter adapts by decreasing and allows the meter to
react faster. Increasing this value tends to provide smoother steady-state flow readings and outputs.
54B35B35B35B4.3.13 CONFIGURE 4-20mA
OUTPUT1 – Only can configure as 4-20mA
4-20MA
YES
NO
Select YES, then configure and calibrate of the 4-20mA output
Programming
4-20mA
FLOW4MA
FLOW20MA
CAL4MA
CAL20MA
4-20TEST
4-20mA Span
The FLOW 4MA and FLOW 20MA entries are used to set the span of the 4-20mA analog output.
These entries are volumetric rate units that are equal to the volumetric units configured as
Engineering Rate Units and Engineering Units Rate Interval. For example, to span the 4-20mA
output from 0 GPM to +500 GPM, with 12mAbeing 250 GPM, set the FLOW 4MA and FLOW ：
20MA values as follows:
FLOW4MA=0.0
FLOW20MA=500.0
4-20mACalibration
The 4-20mA output is factory calibrated and should not require Adjustment unless it is replaced.

Doppler Ultrasonic Flowmeter DF6100 Manual
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The 4-20 CAL ? Entry allows fine adjustments to be made to the “zero” and span of the 4-20mA
output. Select YES to access adjustment. To adjust the 4mA output, a milliammeter or reliable
reference must be connected to the 4-20mA output.
4-20mATest
4-20TEST – 4-20mA Output Test
Allow a simulated value to be output from the 4-20mA output. By incrementing this value, the
4-20mA output will transmit the indicated current value.
55B36B36B36B4.3.14 Dual Relay Configuration
It only can be configured in OUTPUT 2, the relays are rated for 350 VDC load voltage and have a
load current of 0.12A.
OUTPUT2 Relay (One and only selection)
RELAY
NONE
4-20MA
RATE
Also select “RELAY”, after this, it has two options: “PULSE TO” and “FLOWALM”.
PULSE TO is corresponding to Wiring terminal “PULSE -, +”, and only can be configured as
totalizer pulse output. Please select TOTAL mode, it configures the relay to output a 50mSec pulse
each time the display totalizer increments.
PULSE TO mode configures the relay to output a 50mSec pulse (contact changeover) each time the
display totalizer increments.
(Based on customer orders statement for terminal contact)
FLOWALM is corresponding to Wiring terminal “RELAY -, +”, only can be user configured as
flow rate alarm, error alarm, or power supply interruption alarm output.
Flow Rate Relay configuration permits relay changeover at two separate flow rates allowing
operation with an adjustable switch deadband. Fig 4.2 illustrates how the setting of the two set points
influences Rate Alarm operation.
A single-point flow rate alarm would place the ON> setting slightly higher than the OFF< setting –
allowing a switch deadband to be established. If a deadband is not established, switch chatter (rapid
switching) may result if the flow rate is very close to the switch point.

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Fig 4.2 Single PointAlarm Operation
56B37B37B37B4.3.15 Change Password
PASSWORD – Change the Security Password
0-9999
By changing the Security Password from 0000 to some other value (any value between 0001-9999),
configuration parameters will not be accessible without first entering that value when prompted. If
the value is left at 0000, no security is invoked and unauthorized changes could be made. Access to
resetting of the Totalizer is also protected by this password.
57B38B38B38B4.3.16 SERVICE mode
SERVICE mode allows access to the following parameters.
Select YES to access these parameters.
AGC MODE - Automatic Gain Control
GAIN POT - Digital Gain Control
FILTER - Hardware Filter Control
XDCR TYP – Transducer Type
LINEAR - 10 Point Linearization
1. AGC MODE –Gain Control Mode of Operation
NORMAL - Factory default Settings, Automatic Gain Control Mode, Used for generally
conditions
HIGH - Automatic Gain Control Mode, Used for low signal strength conditions
MANUAL - Manual Gain Control Mode, AGC disabled, Used for not enough straight pipe or
other special conditions
When NORMAL is selected, the unit will automatically control the gain and front end hardware
filter for optimum measurement of the Doppler signal. Press ENTER key, the unit will automatically
advance to XDCR TYP selection.

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When sound is not getting through the pipe as well or other conditions that the signal is weak, meter
reading is smaller than actual flow, In this case, Select HIGH to increase the signal strength and then
increase in flow rate. Press ENTER key, the unit will automatically advance to XDCR TYP
selection.
For applications where has not enough straight pipe or other special conditions, select the MANUAL
mode. Typically, this would only be required at very low flow rates. When MANUAL mode is
selected, the GAIN POT and FILTER settings are manually set. Automatic control is disabled.
2. GAIN POT – Digital Gain Pot
0-64
Use the arrow keys, increase or decrease the numerical value to set the signal gain level. Typically,
optimum flow measurement is made when this value is between 20 and 30. Use the lowest value that
provides an accurate and stable flow reading. This adjustment must be made in conjunction with the
FILTER setting, and may be an iterative process.
When the measured liquid has more air bubbles or suspended solids, the GAIN POT may set a lower
value. When the measured liquid has less air bubbles or suspended solids, the GAIN POT may set a
higher value.
3. FILTER – Hardware Filter Selection
NONE - No Filter;
LOW – When the flowmeter is installed before or after a pump or valve, and the straight pipe is not
enough, set FILTER (Hardware Filter Control) to LOW, so the flowmeter will get a more
accurate reading;
MEDIUM - After the flowmeter installation location, connected rising pipeline, and the straight pipe
is not enough, set FILTER (Hardware Filter Control) to MEDIUM, so the flowmeter
will get a more accurate reading;
HIGH - High Filter;
4. XDCR TYPE – Transducer Type
3DUAL– All Clamp-on Transducers, symmetrically insertion Transducers
PROBE - Insertion Probe Transducer
Select the appropriate transducer type to be connected to the Doppler flow meter transmitter. The
selection invokes optimum hardware and software settings unique to the transducer architecture.
5. LINEAR – Entry of Linearization Data
40B40B40B(Users do not need to modify the data, Please consult factory technical personnel in specific
situation)
The Linearization feature allows for correction of flow readings caused by non-linear flow
measurement. This typically occurs when there is insufficient straight piping before or after the

Doppler Ultrasonic Flowmeter DF6100 Manual
20
location where the transducers are mounted.
Up to 10 linearization points may be entered. The microprocessor will perform a linear interpolation
between data points entered in the linearization table and apply the associated correction factor to the
measured flow rate.
Start by entering the number of linearization points to be entered at the NUM PTS prompt. If a value
of 00 is entered, linearization is disabled.
The unit will then prompt for FREQ 1 to be entered. Enter the measured frequency corresponding to
the flow rate for the first point. This can be obtained by running actual flow with the DISPLAY
mode set to DIAG and reading the measured frequency, or by calculating the frequency if the flow
rate in feet per second is known using the following formulas:
Dual: Clamp-On or symmetrically insertion Transducer:
Freq = Velocity (FPS) × 80 Hz
Probe: Insertion Probe Transducer:
Freq = Velocity (FPS) × 80 Hz
The unit will then prompt for COEFF 1 to be entered. This is the value that the measured flow rate
will be multiplied by at this point.
Enter the coefficient or correction factor to be applied. The value entered must be between 0.5 and
1.5.
Repeat this procedure for all of the linearization points. When all of the points have been entered, the
unit will return to the NUM PTS prompt. Press the Menu key to return to the main menu LINEAR
prompt. Then using the arrow keys, move to the next setup parameter.
23B4.4 OPERATING INSTRUCTION
zIn order to measure accurately, should wait for 2-5 minutes when meter starts to work, read the
reading after display reading stable.
zNeed to go in setting state, please press ENTER key.
zRefresh total flow only when run state.