Tactical TFM VT-222 User manual

TFM VT-222 Vortex Flowmeter User Manual
TFM VT-222 Multi Variable Vortex Flow Meter
Goes with ModBus
QUICK User Manual
Take 5, Inc.
1335 Dayton Street Unit A
Salinas, CA 93901
[e-mail]
Call 831-244-8080
QR Code for Website with Videos. Open Video tab and watch the first video for
simple user configuration instructions
TFM VT-222 Vortex Flowmeter Quick Manual Rev 10f page 1 of 30

TFM VT-222 Vortex Flowmeter User Manual
Table Of Contents
Technical Support 3
Electronics Specifications 3
Hardware 4
Terminal Board Wiring 4
4-20mA output HART External Pressure
Lee: Do we have new photos for the connector board with the nice labeled connections? 5
Pulse Output+ External Pressure and Temperature sensors 5
Sensor Interface 5
Vortex Sensor 5
Pressure Sensor 6
Temperature Sensor 6
Vortex Dimensions: 7
LCD Display 7
Three-line display mode 8
Two-Line Display: 8
Local Adjustment:.. Probably do not need this below…. 9
Data Entry: 10
Pipe diameter 12
Pressure Unit 12
Flow correction factor 12
Test modes 12
Traffic test mode 12
Frequency test mode 12
Current test mode 12
Loop current calibration 13
Custom units 13
Basic Functions No Password Required 14
Password Protected Functions 15
1 Protocol Overview 22
1.1 Serial Communication Parameters 22
1.3 Communication Interface Functions Format 22
1.3.2 Function 04(Read Input Register) example 23
1.3.3 Function Code 16(Write Holding Registers) example 23
2 Register Description 23
2.1 Input Registers Table (Variables) 23
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TFM VT-222 Vortex Flowmeter User Manual
H86CT1 Product Manual
Technical Support
TacticalFlowMeter VT-222 Vortex flowmeters utilize piezo sensors to detect the Vortex Shedding
Frequency. We integrate internal Pressure and Temperature sensors to provide for full multivariable
operation. Please read this manual carefully before using the meter. If you have any questions, please
do not hesitate to contact us.
Company：Take 5, Inc. dba TacticalFlowMeter.Com
Tel：[phone] x1 Sales, x2 Support
Website：www.TacticalFlowMeter.com
Electronics Specifications
Power Supply: 12-32VDC
Operating Temperature: -20°C to 70°C(with LCD -40°C to 85°C(without LCD)
Output: 4-20mA output
Configuration: Flow mode, Flow unit, Range (Qmax), Density, Temperature, etc.
Alarm: Low alarm outputs 3.8 mA & high alarm can outputK-Factor linearity: The VT-222 provides 2 to 5
points of K-Factor linearity correction.
Local adjustments: Setting range and PV units, Density, Flow mode, damping, high alarm percent, low alarm
percent and data recovery etc.
LCD display: Line 1 shows the instantaneous flow. Line 2 shows the totalized flow. Line 3 can display the
percentage, output current, temperature, pressure, density and more combinations easily selected by the user.
Multivariable Operation:The VT-222 supports real-time temperature and pressure compensation for gas, and
utilizes the international standard for the steam and density tables for temperature and pressure compensation as well
for superheated steam with pressure compensation or temperature compensation for saturated steam.
Temperature trim: High trim and low trim .
Pressure trim: High trim and low trim .
The VT-222 provides power-down protection and flow totalizer value storage functions.
Hardware
Terminal Board Wiring
The terminal board is used for connection to the external power supply, output pulse, the external
pressure sensor and temperature sensor.
The following are common wiring methods.
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TFM VT-222 Vortex Flowmeter User Manual
4-20mA output HART External Pressure
Pulse Output External Pressure and Temperature sensors
Sensor Interface
Vortex Sensor
The 2-Pin green XT terminal is used for connecting the vortex piezo sensor that has no polarity.
Note: The main circuit board must be properly safety grounded
according to NEMA safety standards
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TFM VT-222 Vortex Flowmeter User Manual
Pressure Sensor
Use the XF3 socket to connect the pressure sensor (pressure sensor must be a bridge type
sensor). I+ and I- are the power supply, A + and A- are the sensor signal outputs.
The bridge impedance of the pressure sensor must be between 3 to 6000 ohms. The supply current for
the pressure sensor is about 0.3 mA. As long as the sensor output does not exceed [email protected], you
may use an external sensor of your choice.
Socket XF3 defined as follows:
Temperature Sensor
Socket XF5 supports Pt1000 and Pt100, two-wire connection.
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TFM VT-222 Vortex Flowmeter User Manual
Note: The main circuit board must be properly safety grounded
according to NEMA safety standards
Vortex Dimensions:
LCD Display
The LCD display features a 128 x 64 dot matrix full graphics display, allowing for convenient display modes to suit
specific needs. The instrument supports two display modes：
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TFM VT-222 Vortex Flowmeter User Manual
Three-line display mode
Line 1 displays the Instantaneous flow.
Line 2 displays the totalized flow.
Line 3 displays frequency, pressure,fluid temperature, density,
current, or percentage.
Notes:
►When using the onboard pressure sensor, and the pressure signal has a fault condition, the
corresponding pressure value will be replaced with the set pressure value and it will flash.
► When using the onboard temperature sensor, and the temperature signal has a fault condition, the
corresponding temperature value will be replaced with the set temperature value and it will flash as well.
► When the flow mode is Sat_Steam(P), indicating it is in saturated steam pressure compensation, the
temperature value will display as " ", which indicates the measurement of the temperature sensor is not
enabled.
►When the flow mode is Sat_Steam(T), indicating it is in saturated steam temperature compensation,
the pressure value will display as " ", which indicates the measurement of the pressure sensor is not
enabled.
Note: Long Press KEY-D to change the third line display variable(s) to one of the
following: Note this meter can accurately indicate the DENSITY!
Two-Line Display:
Bar Graph 0- 100% Full Scale
Line 1 displays the Instantaneous flow.
Line 2 displays the totalized flow.
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TFM VT-222 Vortex Flowmeter User Manual
Local Adjustment:.. Probably do not need this below….
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Data Entry:
Enter or Exit Menu Mode
Enter Menu Mode
In the operating mode, press the "E" key to Enter the menu mode (data entry).
Exit Menu Mode
In the menu mode, press the "E" key to Exit the menu mode and Enter the operating mode.
Data Entry Method
There are two ways to set parameters, one is using the "Keypad Method" with the3 button interface on the
electronics and the other way is to use ModBus to set the parameters. To make it easier be sure to watch the videos
on the website that demonstrates the methods clearly.
‘Keypad’ Method
1. Long press the D-Key to enter the setting, and the sign flag will start flashing.
2. Short press the D-Key to select the sign.
3. Press the U-Key to shift the setting number. The number bit will start flashing, which means that
you can set. Press D-Key to increase the setting number.
4. Press the U-Key to shift the setting number again. All digits can be set using the same method.
5. After setting all 6-digits, press U-Key to set the decimal point position. All five decimal points will flash
simultaneously, indicating they can be set. Short press D-Key to change the decimal point position.
6. After completing data entry, you can long press D-Key to save the parameters. Or Press E Key to abort and
exit. The D and E Keys are important to select based on your needs. Long hold the D-Key to save your
changes.
For example, On the next pages we show changing the Full Scale from 200, the new input range limit
of 400. Setting the range limit, Full Scale, is important for driving the 4-20 mA and Frequency
Outputs.
●Long press D-Key to enter settings, and the menu options will start flashing.
●Short press D-Key or S-Key to scroll backward or forward in the menu.
●Long press D-Key to access, and then save, the parameter.
Refer to the key names below.:
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Pipe diameter
The pipe size is selected from a range of sizes.
The flow meter size can be set through RS485 communication or keys, the setting range is 2-2000, and the unit is
fixed in mm.
The diameter is manually input, and the flow lower limit, flow upper limit, and maximum magnification must be
manually input.temperature unit
The temperature unit is increased by ℉ (Fahrenheit), that is, the temperature unit can be switched between Celsius
and Fahrenheit.
Pressure Unit
The pressure unit is increased by PSI, that is, the pressure unit can be switched between KPa or PSI.
Standard pressure point and standard temperature point
The standard state of H880TBR corresponds to a fixed 20°C and 101.325KPa.
Now H86CT1 supports users to set standard pressure value and standard temperature value, that is, pressure point
and temperature point in standard volume state. For example, it can be set to 68 degrees Fahrenheit, 101325 Pa or 32
degrees Fahrenheit 100KPa, and the corresponding state is used as the standard state. When the set unit is the
standard condition unit, the condition flow rate will be converted to the standard condition flow rate of the set point.
Flow correction factor
Global flow correction factor, the setting range is 0.1-10. For example, if it is set to 1.1, the flow will be increased
by 10%.
Test modes
Use the 3 button interface to enter the Code screen, and enter the password 02086 to enter the test menu. Users can
choose any function: flow test, frequency test or current test.
Note: In the test mode, the cumulative flow does not participate in the accumulation.
The specific test functions and operation instructions are as follows:
Traffic test mode
1. After selecting the flow test menu, the interface prompts "flow test", the unit is the current instantaneous
flow unit, and the second line prompts the current flow (it may also be initially 0, depending on the
programming). It doesn't really go into test mode at this point.
2. After inputting the new flow rate and saving it, it enters the test mode. At this time, the meter calculates
the percentage, outputs the current value, output pulse value, etc. according to the input instantaneous
flow rate value, and outputs it accordingly. The backlight flashes to alert the operator that it is in the test
mode at this time. If there is no new key operation within 10 minutes, it will automatically exit.
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Frequency test mode
1. After selecting the frequency test menu, the interface prompts "frequency test", the unit is Hz, and the
second line initially prompts 0. It doesn't go into test mode at this point.
2. After inputting the new frequency and saving it, after selecting the current test menu, the interface
prompts "current test", the unit is mA, and the second line initially prompts 0. It doesn't really go into test
mode at this point. Enter the test mode, at this time the instrument outputs the specified pulse frequency
value. The backlight flashes to remind the operator that it is in the test mode at this time. If there is no key
operation within 10 minutes, it will automatically exit.
Current test mode
1. After inputting the new current value and saving it, it actually enters the test mode, and the meter outputs
the specified current value at this time. The backlight flashes to remind the operator that it is in the test
mode at this time. If there is no key operation within 10 minutes, it will automatically exit.
Loop current calibration
Custom units
The current custom unit is fixed at **/s. Change the custom unit to 3, namely SPC/h, SPC/m, SPC/s. The user can
set the corresponding unit through the key or RS485 communication.
When the instantaneous flow unit is set, the cumulative flow unit is also automatically determined. The
corresponding relationship table is below:
Instantaneous flow unit
Corresponding total flow unit
Nm3/h，Nm3/m，Nm3/s
Nm3
m3/d，m3/h，m3/m，m3/s
m3
l/h，l/m，l/s
L
Scf/s，Scf/m，Scf/h，
Scf
cf/s，cf/m，cf/h，
cf
USG/s，USG /m，USG /h，
USG
UKG/s，UKG /m，UKG /h，
UKG
bbl/h，bbl/d，
bbl
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g/h，g/m，g/s
g
kg/d，kg/h，kg/m，kg/s
kg
t/d，t/h，t/m
t
lb/h，lb/d
lb
SPCL/d (instantaneous unit displays
SPCL/d, the internal calculation is
the same as m3/m * 1440)
SPCL
SPCL/h, (instantaneous unit displays
SPCL/h, the internal calculation is
the same as m3/h)
SPCL 4 CHARACTERS
SPCL/m (instantaneous unit displays
SPC/h, the internal calculation is the
same as m3/m)
SPCL
SPCL/s (instantaneous unit displays
SPC/h, internal operation is the same
as m3/s)
SPCL
Basic Functions No Password Required
Menu
Setting method
Notes
Contrast
from table
15
Write Protect
from table
ON / OFF
Min Alarm(%)
numeric
Set low alarm value. Unit: %
Max Alarm(%)
numeric
Set high alarm value. Unit: %
MeterSize
Read Only
View meter size setting.
Flow mode
from table
Liquid Qv：Liquid volume
Liquid Qm：Liquid mass
Gas Qv：Gas volume
Gas Qm：Gas mass Steam
Qv：Steam volume
Steam(P/T)：Steam mass
Sat_Steam(T) ： Saturated steam mass (temperature
compensation)
Sat_Steam(P) ： Saturated steam mass(pressure
compensation)
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Flow unit
from table
Volume units supported: Nm3/h，Nm3/m，Nm3/s， l/s
，l/m，l/h， m3/s，m3/m，m3/h，m3/d， Sc f/，Scf/m，
Scf/h，cf/s，cf/m，cf/h，
USG/s，USG /m，USG /h， UKG/s，UKG /m，UKG
/h， bbl/h，bbl/d，
Mass units supported : g/s ，g/m，g/h， kg/s，kg/m，
kg/h，kg/d， t/m，t/h，t/d，lb/h，lb/d
Note: Totalizer flows are based on the flow unit.
Range 100% Full Scale
numeric
Set the Qmax value for selected flow mode (= 20 mA)
Density (kg/ m3)
Density (g/c m3)
numeric
Set Gas density (unit: Kg/m3)
Set Liquid density (unit: g/cm3)
Gauge Pre.(kPa)
numeric
Use for gas or steam measure. Unit: kPa.
Temperature (℃)
numeric
Use for gas or steam measure. Unit: ℃.
PV Cutoff (%)
numeric
Range: 0% - 20% low range cut off.
Damping
numeric
Range: 0 - 64 Seconds.
Line 3 Disp. Value
from table
Set the third line display value, values of 0,1,2, or 3.
Display Mode
from table
Set display mode.
Totalizer reset
from table
Long hold D key until cursor is under NO and Long
Hold. When the LCD shows “Yes‟, long press D-Key
to reset the totalizer and overflow counter.
Number of totalizer
overflows
read only
Display of the number of totalizer overflow events;
1 overflow = 10,000,000
K-Factor
read only
View the Flow Meter Calibration K-Factor.
Password Protected Functions
OpCode
Code
Password
Input
Input 00050, set 51- 57 menus,Main
Input 00060, set menus,K-Factor 5 Points
Input 00061, set menu,Frequency Factor
Input 00062, set menu,Amp Channel for sensor
Input 00063, set menu,Work Mode & TEST mode
Input 00070, set menu,Temp and Press vars
Input 00040, set menu,Adjust/Test 4-20
Input 00038, set menu,Steam Variables
Input 00011, view menu,Version
Input 00090, set menu ModBus settings
Input 00111, set menu, preset total, set value
Input 00721, set menu, temp. sensor trim
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TFM VT-222 Vortex Flowmeter User Manual
Input 00741, set menu, set pressure sensor trim
Input 02086, set menu, Validation Mode
Enter the password 00050 to enter:
Signal
monitoring
Signal Monitor
Signal
Read Only
Constant
Vortex Size
MeterSize
Pipe Size
direct
input
The input data range is 2- 10000 mm
Note: LCD displays 100, which means the diameter
is 100 mm.
After changing the diameter of the vortex street, the
lower limit flow rate, the maximum magnification
and the meter coefficient (K value) must be reset.
medium
Fluid Type
medium
menu
selection
Options：Gas, or Liquid.
Note: When changing the fluid type, confirm
all values from 53 to 56. Why is this
necessary? Do they automatically change?
Lower limit
flow
Low Flow Limit
Lower limit
flow
direct
input
Depending on the meter size and measuring
media, set the corresponding low limit of the
flow.
The unit of „Low Flow Limit‟ is in units of
m3/h.
upper limit
flow
High Flow Limit
upper limit
flow
direct
input
The „High Flow Limit‟ defaults to 10 times the
„Low Flow Limit‟, the actual measurement of
the upper limit of 2.5 times the set value.
The unit of „High Flow Limit‟ is in units of
m3/h.
gain
Max AMP.
set
magnification
direct
input
Select between 200 and 1000. Typically about
400.
Meter factor
(K value)
K-Factor
Meter factor
K
direct
input
Calibration K-Factor Factory set and on the label
Units of hz/m3
Pulse output
mode
Pulse Out Mode
Pulse output
mode
menu
selection
Select frequency or pulse output. 1-5000 Hz. Default
5000 Hz
Impulse
coefficient unit
Pulse Factor Unit
Impulse
coefficient
unit
menu
selection
Options：m3, N m3, t, kg, Scf, cf, USG,UKG, bbl,
lb.
Output pulse
coefficient
Pulse Factor
Output pulse
coefficient
direct
input
Set the output pulse number corresponding 1
„Pulse Factor Unit‟.
Note:To output the original pulse, set
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TFM VT-222 Vortex Flowmeter User Manual
‘K-factor
[57]’ and ‘Pulse factor [59]’ to the same
value, and set ‘Pulse Factor Unit [58]’ in
units of m3.
Range
frequency
Frequency Max.
The frequency
corresponding
to the upper
limit of the
range
direct
input
500-5000 (default 5000)
Enter password 00060 to enter:
Five point
correction [60]
K-Factor Trim Fi
K-Factor Trim Yi
Five-point
correction
frequency i,
Five-point
correction
coefficient i,
direct
input
Five-point K-Factor correction.
Where Fi is the reference frequency,
Yi is the correction coefficient K.
i=1,2,3,4,5.
Five-point
correction
frequency
coefficient
setting [61]
Frequency Factor
Five-point
correction
frequency
coefficient
direct
input
The reference frequency value of the five-point
correction is multiplied by the Frequency Factor,
and the new reference frequency.
By default, this value is set to 1
4mA
calibration
[40]
Channel
Settings [62]
AMP. Channel
Channel
settings
menu
selection
There are 3 channel options: CH_1, CH_2,
CH_3 CH_3 gain maximum
CH_1 gain minimum
Note：
CH_2 generally used for liquid
measurement, which corresponds to the
configuration software, select X1 and X2.
CH_3 generally used for gas measurement,
which corresponds to the configuration
software, select X1, X2 and X3.
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Working
Mode[63]
Work Mode
Operating
mode
menu
selection
F_1, F_2, F_3, & F_4 options.
F_1: Anti-vibration Mode
F_2: Normal Mode
F_3: Turbine Mode
F_4: Test Mode
Note: Default Value is F_2.
Enter password 00040 to enter:
Current Output
4mA Trim
4mA
calibration
Calibration steps:
1. Press and hold the "D" key for three seconds to
enter the calibration;
2. Short press the D key to decrease the current;
press the U key to increase the current, the step
is 16 microamps;
3. Press and hold the "D" key for three seconds to
save the calibration; or press the E key to exit
without saving.
20mA
calibration
[41]
20mA Trim
20mA
calibration
Test mode drives 4-20& frequency outputs for
testing
Enter password 00038 to enter:
Minimum
pressure 38
Min Pre. (Kpa)
Minimum
pressure value
direct
input
This parameter is only used for steam mass
measurement.
In the steam mass measurement mode, if the
pressure is less than the set “minimum pressure
value” when the pressure compensation is
activated, the flow will
automatically return to zero.
Minimum
temperature 39
Min Temp. (℃)
Minimum
temperature
value
direct
input
This parameter is only used for steam mass
measurement.
In the steam mass measurement mode, if the
temperature is less than the set “minimum
temperature value” when the temperature
compensation is activated,
the flow will automatically return to zero.
Version
Version
Version
read only
Firmware version. U8
maximum
frequency
Max Frequency
maximum
frequency
read only
The internal conversion frequency value
corresponds to the “High Flow Limit”
“High Flow Limit”/K-FACTOR*3.6
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TFM VT-222 Vortex Flowmeter User Manual
Minimum
frequency
Min Frequency
Minimum
frequency
read only
The internal conversion frequency value
corresponds to the “Low Flow Limit” “Low
Flow Limit”/K-FACTOR*3.6
Enter password 00090 to enter:
Slave ID
Modbus Addr.
Modbus
address
direct
input
Enter Modbus address. Default 001
baud rate
Modbus Baud.
Modbus rate
menu
selection
Options: "9600" , "4800" , "2400" , "1200" , "600"
Enter the password 00111 to enter:
Preset
cumulative
flow 111
Total Reset or
Preset
Accumulated
flow preset
direct
input
Directly sets the current cumulative flow value. To
reset the totalizer use the main password free menu.
This may ALSO be used to set to 0 as well.
Enter password 00070 to enter:
Temperature
collection
method
settings
Temp. Measure
temperature
collection
menu
selection
Temperature acquisition mode
setting. Options：Manual, or Auto.
Manual: Temperature uses an input reference
value.
Auto: Temperature uses automatic acquisition
with an internal Pt1000 or Pt100 sensor
Pressure
collection
mode setting
Pressure
Measure
Pressure
acquisition
menu
selection
Pressure acquisition mode setting.
Options：Manual, or Auto.
Manual: Pressure uses an input reference
value. Auto: Pressure uses automatic
acquisition with
the internal pressure sensor.
temperature
unit
Temp. Unit
temperature
unit
menu
selection
Celsius (°C)
Fahrenheit (°F)
Temperature
low point
calibration
Temp. Low Trim
Temperature
low point
calibration
direct
input
Enter the lower calibration resistor value. unit:
ohm. Use standard resistance as input.
For example: 1000 for Pt1000, or 100 for Pt100.
Temperature
high point
calibration
Temp. High Trim
Temperature
high point
calibration
direct
input
Enter the high calibration resistor value,
unit: ohm. Use standard resistance as input
For example:2500 for Pt1000, or 250 for Pt100.
pressure type
Gas Pre. Type
Gas pressure
menu
Select gauge/absolute pressure
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type
selection
pressure unit
Temp. Unit
pressure unit
menu
selection
Kpa, PSI
Pressure zero
calibration
Pre. Low Trim
Pressure zero
calibration
direct
input
Enter the calibration reference pressure value,
unit is Kpa
Apply the standard pressure to the sensor.
For example: 0 Kpa
full pressure
calibration
Pre. High Trim
full pressure
calibration
direct
input
Enter the calibration reference pressure value,
unit is Kpa
Apply the standard pressure to the sensor.
For example: 1000 Kpa
Low pressure
cutoff
Pre. Cutoff
low pressure
excision
direct
input
Set the low pressure cutoff value. Unit is Kpa.
If the measured pressure value is less than “Pre.
Cutoff”, the pressure will be set to 0 kpa.
pressure
transfer at any
point
Set Pre. Bias
pressure
transfer at any
point
direct
input
Set the pressure bias value. Unit is Kpa.
Enter the current actual pressure value to achieve
bias. The pressure will be set to input value.
Enter the password 00721 to enter:
temperature
calibration
data
Temp. Data X0;
Temp. Data Y0;
Temp. Data X1;
Temp. Data Y1;
Temperature
low point
collection
value;
Low
temperature
resistance;
Temperature
high point
collection
value;
high
temperature
resistance;
direct
input
Directly view and modify the temperature sensor
calibration values.
Temp. Data X0 and Temp. Data X1 are internal
ADC measurements.
Temp. Data Y0[73] and Temp. Data Y1[74] are
the
input calibration values.
Enter the password 00741 to enter:
Pressure
Calibration
Data
Pre. Data X0;
Pre. Data Y0;
Pre. Data X1;
Pre. Data Y1;
Pressure zero
point
collection
value;
pressure zero
value;
Collected
value of
pressure full
point;
pressure full
direct
input
calibration values.
Pre. Data X0 and Pre. Data X1 are internal ADC
measurements.
Pre. Data Y0[75] and Pre. Data Y1[76] are the
input calibration values.
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point value;
Enter the password 02080 to enter:
Standard gas
pressure
(gauge
pressure)
Standard Pre.
Gas gauge
pressure
direct
input
Unit: Current pressure unit
Standard gas
temperature
Standard Temp.
gas
temperature
direct
input
Unit: current temperature unit.
Flow
correction
factor
Flow correction
factor
Flow
correction
factor
direct
input
Global K-Factor to adjust the indicated flow value
over the entire range. Value can be from 0.1 to 10
Unit correction
factor
Unit correction
factor
Unit
correction
factor
direct
input
Unit K-Factor to adjust the SPCL units to allow
using SPECIAL units. This should be a U32/10000
so we can cover mScf/h and mSCF/d Value can be
from 0.1 to 10
Enter the password 02086 to enter the test mode:
Traffic test
Flow Test
Traffic test
direct
input
Unit: HZ (1-5000)
Note 1: Calculate the corresponding instantaneous
flow rate, current value, and pulse (frequency) value
according to the input sensor frequency value, and
output it.
These values are also read through RS485.
The cumulative flow advances just like the real mode
for validation.
Note 2: The test mode will only be executed after a
new value must be entered, and the LCD backlight
will flash at this time.
Frequency
testCurrent test
Frequency Test
Frequency
test
direct
input
Unit: HZ (10-5000)
Note 1: This function only outputs the specified
frequency value. The instantaneous flow rate value
and current value at this time are not affected. The
cumulative flow remains the same.
Note 2: The test mode will only be executed after a
new value must be entered, and the LCD backlight
will flash at this time.
Current test
Loop Test
Current test
direct
input
Unit: mA (3.9-21)
Note 1: This function only outputs the specified
current value. The instantaneous flow rate value and
pulse output value at this time are not affected. The
cumulative flow remains the same.
Note 2: The test mode will only be executed after a
new value must be entered, and the LCD backlight
will flash to indicate in test mode.
TFM VT-222 Vortex Flowmeter Quick Manual Rev 10f page 20 of 30