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Bulletin F-GFT2
Series GFT2 Flow Totalizer
Specifications - Installation and Operating Instructions
GFT2
FLOW TOTALIZER
INPUT/OUTPUT STATUS
3-13/32
[86.36]
9-PIN FEMALE
I/O PORT
47/64
[18.8]
3
[76.2]
The Series GFT2 Flow Totalizer is a microcontroller driven device designed to linearize the flow meter and controller flow curve plus display the instantaneous flow rate, total, and accumulated total. The totalizer is intended to be used with analog flow meters and controllers with analog 0 to 5 VDC, 0 to 10 VDC, or 4 to
20 mA interface. RS-232 or RS-485 digital interface is available.
FEATURES
• Up to 47 different volumetric and mass flow engineering units (including userdefined)
• User adjustable LCD back light and contrast level
• Compact design for unit mount, panel mount, wall mount, or field mount applications
• Low and high flow alarms with programmable action delay.
• Free configuration and mounting utility software
• 0.51˝ (13 mm) LCD digits
Unpacking the Totalizer
The Totalizer was packed in a sturdy cardboard carton. Inspect the package for possible external damage from shipping. Open the carton carefully and inspect for any sign of concealed shipping damage. When unpacking make sure that all hardware is included. The hardware should include:
(1) GFT2
(1) CD with Utility Software and operating manual
(1) Mounting Bracket with 4 screws
Safety Instructions
The GFT2 is not intended for use in life support applications or where malfunctioning of a device may cause personal injury. When adjusting or servicing the GFT2, take special precaution to prevent inadvertent damage to the integral solid state circuitry.
Electrical Connection
2
3
Pin
1 v4
5
6
7
Function
Power Supply, Common
Power Supply, Positive
RS-232 RX, Optional RS-485 (+)
Analog Input (+), PV Input
Analog Output (+), PV set point
RS-232 Signal GND (RS-485 GND Optional)
RS-232 TX, Optional RS-485 (-)
Note
Power Input
Power Input 12 to 26 VDC
Communication
(RS-232 is input, RS_485 input/output)
Input
Output
Communication Reference
Communication
(RS-232 is output, RS-485 input/output)
8
9
Analog Input/Output reference common for pins 4 and 5)
5VDC reference input (for 5 to 10 VDC only)
Table 1
SPECIFICATIONS
Input Analog Range: 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mA.
Accuracy: ±0.1% FS.
Operating Temperature: 14 to 158°F (-10 to 70°C).
Power Supply: 12 to 26 VDC.
Weight: 0.3 lbs (125 g)..
“D” Connector
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 www.dwyer-inst.com
e-mail: [email protected]
The power supply (PS), process variable (PV) input, set point (SP) control output, and serial communication interface signals are connected to the GFT2 via miniature 9 pin female “D” connector.
Power Supply Connections
The power supply requirements for the GFT2 are: 12 to 26 VDC, (unipolar power supply).
DC Power (+) --------------- Pin 4 of the 9 pin “D” connector
DC Power (-) --------------- Pin 8 of the 9 pin “D” connector
CAUTION -Do not apply power voltage above 28 VDC. Doing so will cause device damage or faulty operation.
-Make sure power is OFF when connecting or disconnecting any cables or wires in the system.
Power Variable (PV) Input Signal Connections
Depending on jumper J2 configuration, input signal can be set to 0 to 5, 0 to 10VDC, or 4 to 20 mA.
CAUTION When connecting the external signals to the input terminals, always check actual jumper J2 configuration. Do not exceed the rated values shown in the specifications in Table 2. Failure to do so might cause damage to this device. Be sure to check if the wiring and the polarity of the power supply and PV signals are correct before turning the power ON. Wiring error may cause damage or faulty operation.
RS-232 Serial Communication Interface Connections
The digital interface operates via RS-232 and provides access to all applicable internal configuration parameters and data.
The settings for the RS-232 communication interface are:
Baud rate:
Stop bit: default 9600 baud
1
Data bits: 8
Parity: None
Flow control: None
The RS-232 Communication Interface Connection must establish a crossover connection form the PC host connector to the “D” connector.
RS-232 RX: Pin 2 on the host PC DB9 connector - Pin 7 of the 9 pin “D” connector
(TX-)
RS-232 TX: Pin 3 on the host PC DB9 connector - Pin 3 of the 9 pin “D” connector
(RX-)
RS-232 Signal GND: Pin 5 on the host PC DB9 connector - Pin 6 of the 9 pin “D” connector
RS-485 Communication Interface Connection:
The RS-485 converter/adaptor must be configured for: multidrop, 2-wire, half duplex mode (see Figure 6). The transmitter circuit must be enabled by TD or RTS
(depending on which is available on the converter/adapter). Settings for the receiver circuit should follow the selection made for the transmitter circuit in order to eliminate echo.
RS-485 T(-) or R(+)
RS-485 T(+) or R(-)
RS-485 GND (if available) pin 7 of the 9 pin “D” connector (TX-) pin 3 of the 9 pin “D” connector (RX+) pin 6 of the 9 pin “D” connector
GFT2#1 GFT2#2 GFT2#3 GFT2#4 GFT2#N
PV Input
Type
0 to 5 VDC
0 to 10 VDC
4 to 20 mA
Maximum Rated Values for PV Input Signals
J2 Jumper Configuration
J2D
10 to 11
11 to 12
10 to 11
J2E
14 to 15
14 to 15
13 to 14
J2F
17 to 18
17 to 18
16 to 17
Maximum
Signal Level
≤6 VDC
≤11 VDC
≤25 mA
Note
249 Ω Passive, Not
Isolated Current Input
Table 2
DC Power (+) --------------- Pin 4 of the 9 pin “D” connector
DC Power (-) --------------- Pin 8 of the 9 pin “D” connector
Set Point (SP) Output Signal Connections
Set Point (SP) output signal connection is only required if the GFT2 is mated to the flow controller and will be used as a source for Set Point control signal. Depending on the jumper J2 configuration, the SP output signal can be set to 0 to 5, 0 to 10 VDC or
4 to 20 mA.
CAUTION When connecting the load to the output terminals always check actual jumper J2 configuration. Do not exceed the rated values shown in Table 3. Failure to do so might cause damage to this device. Be sure to check if the wiring and the polarity of the power supply and SP signals are correct before turning the power ON. Wiring error may cause damage or faulty operation.
Do not connect external voltage source to the SP output terminals.
Maximum Rated Load Impedence for SP Output Signals
SP Output
Type
0 to 5 VDC
0 to 10 VDC
4 to 20 mA
J2 Jumper Configuration
J2A
2 to 3
2 to 3
1 to 2
J2B
5 to 6
5 to 6
4 to 5
J2C
8 to 9
8 to 9
7 to 8
Maximum
Load Impedence
≤1000 Ω
≤5000 Ω
≤900 Ω
Note
Self powered
(non-isolated)
Table 3
DC Power (+) --------------- Pin 5 of the 9 pin “D” connector
DC Power (-) --------------- Pin 8 of the 9 pin “D” connector
WARNING output signals.
The 4 to 20 mA current loop output is self-powered (nonisolated). Do NOT connect an external voltage source to the
Figure 1 RS-485 Multidrop Half Duplex Two Wire System
LCD Key-Pad Operation: Data Entry and Configuration
Display Indications:
Initially, after the power is first turned on, the banner screen is shown for 2 seconds, then the device firmware and EEPROM data base table revisions on the first line, communication interface type on the second line, baud rate and RS-485 hexadecimal address value on the third and fourth lines are shown for another 2 seconds.
Subsequently, the actual process information (PI) is displayed.
Figure 2
Based on configuration (device function as flow meter or flow controller), different parameters may be displayed in the Process Information (PI) screen by pressing the
UP or DN pushbuttons.
Process Information screens can be configured to be static or dynamic. Using the
Screen mask settings, the user can enable (unmask) or disable (mask) up to 4 different process information combinations (see Figure 6). In static mode the UP button pages through the PI screens in the forward direction, the DN button pages through the PI screens in the reverse direction. When the last PI screen is reached, the firmware “wraps around” and scrolls to the initial PI once again.
In the Dynamic display mode, firmware initiates automatic screen sequencing with user-adjustable screen Cycle Time. When the last PI screen is reached, the firmware
“wraps around” and scrolls to the initial PI screen once again.
NOTE: Actual content of the LCD screen may vary depending on the model and device configuration.
Figure 3 - Initial PI Screen (Flow Meter)
Figure 4 - Initial PI Screen (Flow Controller)
When GFT2 device is set as the last device on the RS-485 bus segment, and 220
Ohm bus termination is required, set jumper J2G to position 19-20. This will result in connection 220 Ohm resistor between RS-485 (+) and (-) terminals.
Digital and Pulse Optically-Isolated Outputs and Connections
GFT2 is equipped with two programmable digital optically-isolated outputs. Each output can be assigned to any one of many different system events or configured as pulse output.
Digital optically-isolated outputs use dedicated 4 position 3.5 mm male terminal block header J1 located on the top side of the GFT2 enclosure . (Mated interface connector: Tyco Electronics P/N 284510-4)
Optocoupler #1 - Terminal J1 (pins 1 and 2):
Plus (+) (passive)
Minus (-) (passive)
Terminal J1 pin 1
Terminal J1 pin 2
Optocoupler #2 – Terminal J1 (pins 3 and 4):
Plus (+) (passive)
Minus (-) (passive)
Terminal J1 pin 3
Terminal J1 pin 4
Adjusting the Set Point using local LCD/Keypad: Current Set Point value is displayed on the second line of the main PI screen, next to the ‘S’ character. See
Figure 7.
Pressing the ENT button while in the PI screen will activate Set Point adjustment mode. The first character of the Set Point value will start to flash. Use the UP or DN button to increase/decrease digit value from 0 to 9. Use RIGHT or LEFT buttons to move the cursor to another digit position. When desired Set Point value is entered, use the ENT button to accept the new Set Point value. If in the end of the Set Point value entry the ESC button is pressed instead of ENT, the original Set Point value will be restored and Set Point adjustment mode will be deactivated. To exit form the
Set Point adjustment mode before Set Point value is accepted, press ESC button.
NOTE: Since the Set Point value entered via local LCD/keypad is stored in the non volatile memory (EEPROM), it will be executed on the next device power up event.
NOTE: If Program Set Point mode is enabled and the program is running, the Set
Point value can be changed at any moment by the execution of the next active step.
Controlling Set Point value using Program Set Point Mode:
In order to activate the Programmed Set Point:
1. Program Set Point mode has to be enabled.
2. Program Loop parameter has to be set to desired value (On/Off).
3. Program Run parameter has to be set to “On”.
Figure 5
WARNING Optically-isolated outputs require application of external DC voltage across terminals. Do not exceed maximum allowed limits for voltage and current: 2V < UCE < 40 V, 0.2 mA < ICE < 150 mA.
Set Point Control (only for devices set as controller)
When the GFT2 is configured as controller it can be used to control the set point value for mated flow controller using the analog output interface. The set point value can be adjusted locally using the LCD/ keypad, remotely via RS-232/RS-485 digital interface, or can be programmed in advance using user preset programs of up to sixteen steps (Program Set Point Mode).
NOTE: Before applying power and process signals, make sure the input/output jumpers are installed in the correct position (see Figure 6).
Figure 6
Pressing the UP or DN button to select the Disabled option and then the ENT button to save settings will disable program protection.
If PP password is set to any value more than Zero, the firmware will prompt with
“Enter PP Password” (see Figure 9). User must enter up to 3 digits program protection code in order to be able to access password protected menus. Once the correct password is entered, Program Protection is turned off until the unit is powered up again.
Figure 7
As shown in the above picture, the program run parameter can be toggled “On” and
“Off” by pressing RIGHT and LEFT keypad buttons while PI screen 4 is active. If the Program Run status parameter set to “Off”, the program execution will pause and current SP value will freeze until the Program Run status parameter is set to
“On”.
NOTE: While Program Set Point mode is running, the current Set Point value also can be changed from local LCD/keypad and digital RS-232 communication interface. In this case, new Set Point value will be kept only until the next successive program step will be executed.
Menu Structure
The diagram on the Figure 10 gives a general overview of the standard top-level display menu structure when running firmware version A001. The ESC pushbutton is used to toggle between the Process Mode (PI screens) and the Setup menus.
UP and DN buttons must be used to move through the menu items. When the last item in the menu is reached, the menu “wraps around” and scrolls back to the beginning of the menu items list. Similarly when the first menu item is highlighted and UP button is pressed, the menu “wraps around” and scrolls down to the end of the menu items list.
All process configuration parameters settings are password protected. In order to access or change them, Program Protection should be disabled. Each time the device is powered up, the Program Protection is enabled automatically. By default
,device is shipped from the factory with Program Protection (PP) password set to
Zero (PP Disabled). If PP password is set to Zero (Disabled), entering PP password is not required and a following screen will appear when Program Protection menu item will be selected. (See Figure 8).
Parameter Entry
There are two methods of data entry:
1. Direct numerical number entry.
2. Tabular Input from a table menu.
Figure 9
If the menu with direct numerical entry is selected, use the UP or DN button to increase/decrease digit value from 0 to 9. Use the RIGHT or LEFT button to move the cursor to another digit position. When the desired value is entered, use ENT button to accept (save in the EEPROM) the new value.
NOTE: During data entry, the input values are checked for acceptability. If data is not acceptable, it is rejected and a message indicates that the new data has not been accepted.
If the menu with tabular entry is selected, the available menu options can be set with the UP or DN buttons and are accepted by pressing the ENT button.
Submenu “Change PP Password”
In order to get access to “Change PP Password” menu, program protection must be disabled. If PP password is set to Zero (Disabled), entering PP Password is not required and PP can be disabled from “Program Protection” menu (see Figure 3).
If PP Password is set to any value more than Zero, the firmware will prompt with
“Enter PP Password” (see Figure 9). User must enter program protection code
(up to 3 digits). If PP password is lost or forgotten, contact Dwyer Instruments.
Figure 8
***** Main Menu *****
Program Protaction (PP)
Change PP Password
Device Information
EngUnits & K-Factor
Alarm Settings
Totalizer Settings
Opt Output Settings
General Settings
Up/Dn
Event Reg. Status
Event Latch Mask
Event Reg. Mask
Reset Event Reg.
Ent
Ent
Ent
Ent
Ent
Ent
Ent
Ent
Device ID & FS Flow
Analog/Com Interface
Firmware/EE Version
Alarm Settings
Totalizer#1 Settings
Totalizer#2 Settings
Pulse & Dig. Outputs
Mated Device Info
General Settings
Measuring Units
UserDefined Units
K-Factor Settings
Flow Alarm Mode
Low Flow Alarm
High Flow Alarm
Flow Alarm Delay
Flow Alarm Latch
Totalizer #1
Totalizer #2
Pulse Output
Opt Output #1 Set
Opt Output #2 Set
Event Register Menu
Analog Input counts
Analog Output Value
LCD Back Light Set.
Pulse Output Queue
CPU Temperature
Display Settings
Device Function
Communication Sett.
Device Calibration
Signal Conditioner
Program Set Point
UD Unit K-Factor
UD Unit Time Base
UD Unit Use Density
K-Factor Mode
Int. K-Factor Index
User Def'd K-Factor
Totalizer #1 Mode
Tot#1 Flow Start
Tot#1 Action Vol.
Tot#1 PowerOn Delay
Tot#1 Auto Reset
Tot#1 AutoRes Delay
Reset Totalizer #1
Totalizer #2 Mode
Tot#2 Configuration
Tot#2 Flow Start
Tot#2 Action Vol.
Tot#2 PowerOn Delay
Tot#2 Auto Reload
Tot#2 AutoRel Delay
Reset Totalizer #2
PulseOutput Mode
Pulse Flow Start
[Unit]/Pulse
Pulse Active Time
Disabled
Low F. Alarm
High F. Alarm
F. Range H-L
Total#1 Event
Total#2 Event
Pulse Output
Diagnostic
Manual On
Display Mode
Screen Cycle Time
Screen Mask
Display Back Light
Display Contrast
Flow Meter
Flow Controller
Baud Rate Settings
RS-485 Bus Address
Full Scale Range
Low Flow Cut-off
Flow PowerUp Delay
Fluid Std. Density
Analog Output Cal.
Analog Input Cal.
Pilot Cal. Timer
Signal Condit. Mode
NRF Num. of Samples
NRF Time Interval
Aver.Filter Damping
FlowLinearizer Mode
Program SP Mode
PSP Loop Mode
PSP Steps Mask
PSP Steps Settings
%FS
ml/sec
ml/min
ml/hr
ml/day
litr/sec
litr/min
litr/hr
litr/day
m^3/sec
m^3/min
m^3/hr
m^3/day
f^3/sec
f^3/min
f^3/hr
f^3/day
gal/sec
gal/min
gal/hr
gal/day
gram/sec
gram/min
gram/hr
gram/day kg/sec
kg/min
kg/hr
kg/day
lb/sec
lb/min
lb/hr
lb/day
Mton/min
Mton/hr
Igal/sec
Igal/min
Igal/hr
Igal/day
MilL/min
MilL/hr
MilL/day
bbl/sec
bbl/min
bbl/hr
bbl/day
User
Once “Change PP Password” menu is selected, the following screen will appear:
Figure 10
Submenu “Device Information”
This submenu contains information about the device’s main configuration parameters. These items are informational only, not password-protected, and can not be changed (read only).
Figure 11
In order to protect device configuration parameters when changing the PP password, the old PP password must be entered.
NOTE: By default, the device shipped from the factory with Program Protection
(PP) password set to Zero (PP Disabled).
Once old and new passwords are entered, the firmware will prompt with a confirmation message (see Figure 12) that the new password has been saved.
Figure 13
Submenu “Measuring Units”
Use the “Engineering Units and K-Factor Menu” to navigate to “Measuring Units” menu option. This option allows configuration of the flow meter/controller with the desired units of measurement. These are global settings and determine what appears on all process information screens and data log records. Units should be selected to meet each particular metering need. A total of 47 different volumetric and mass based engineering units are supported (See Table 4).
NOTE: Program the Measuring Units first because subsequent menus may be based on the units selected. Once Flow Unit of Measure is changed, the Totalizer’s
Volume based Unit of Measure will be changed automatically.
Figure 12
Submenu “User-Defined Units”
In addition to conventional flow units, user-defined flow engineering units may be selected. Use the “Engineering Units and K-Factor Menu” to navigate to the “User
Defined Units” menu option. This option enables user-defined configuration of any engineering unit required for process measurement.
The following three parameters are available for this function:
1. UD Unit volume K-Factor (defined in Liters)
2. UD Unit time base (defined in Seconds)
3. UD Unit use density (units with or without density support)
Before using User-Defined Unit, make sure the proper conversion factor of the new unit with respect to one liter is set (the default entry is 1.00 Liter). Also, proper time base values for User-Defined Units must be set.
The following selections are available: 1 second, 60 seconds (1 minute), 3600 seconds (1 hour), 86400 seconds (1 day). The default entry is 60 seconds. If a mass based User-Defined Unit is desired, then “UD Unit Use Density” parameter must be set to “YES”. The default entry is “NO”, so Fluid STD Density parameter is not used for flow rate calculation.
32
33
34
35
36
27
28
29
30
31
22
23
24
25
26
17
18
19
20
21
42
43
44
45
37
38
39
40
41
46
47
12
13
14
15
16
7
8
9
10
11
Number
1
4
5
2
3
6 lgal/min lgal/hr lgal/day
MilL/min
MilL/hr
MilL/day bbl/sec bbl/min bbl/hr bbl/day
User f^3/day gal/sec gal/min gal/hr gal/day gram/sec gram/min gram/hr gram/day kg/sec kg/min kg/hr kg/day lb/sec lb/min lb/hr lb/day
Mton/min
Mton/hr lgal/sec
Flow Rate
Engineering
Units
%FS ml/sec ml/min ml/hr ml/day litr/sec litr/min litr/hr litr/day m^3/sec m^3/min m^3/hr m^3/day f^3/sec f^3/min f^3/hr
Table 4: Supported Engineering Units List lb lb
Mton
Mton lgal kg kg kg lb lb f^3 gal gal gal gal gram gram gram gram kg lgal lgal lgal
MilL
MilL
MilL bbl bbl bbl bbl
User
Totalizer
Engineering
Units
%s ml ml ml ml litr litr litr litr m^3 m^3 m^3 m^3 f^3 f^3 f^3
Description
Percent of full scale
Mililiter per second
Mililiter per minute
Mililiter per hour
Mililiter per day
Liter per second
Liter per minute
Liter per house
Liter per day
Cubic meter per second
Cubic meter per minute
Cubic meter per hour
Cubic meter per day
Cubic feet per second
Cubic feet per minute
Cubic feet per hour
Cubic feet per day
Gal per second
Gal per minute
Gal per hour
Gal per day
Grams per second
Grams per minute
Grams per hour
Grams per day
Kilograms per second
Kilograms per minute
Kilograms per hour
Kilograms per day
Pounds per second
Pounds per minute
Pounds per hour
Pounds per day
Metric Ton per minute
Metric Ton per hour
Imperial Gal per second
Imperial Gal per min
Imperial Gal per hour
Imperial Gal per day
Million Litr per minute
Million Litr per hour
Million Litr per day
Barrel per second
Barrel per minute
Barrel per hour
Barrel per day
User Defined
Submenu “K-Factors Settings”
Conversion factors relative to Nitrogen are convenient to use when flow meter/controller mated to GFT2 is calibrated for Nitrogen and another gas is required to be measured/controlled.
Conversion factors relative to Nitrogen, for up to 22 common gases, are stored in the GFT2. In addition, provision is made for a user-defined conversion factor.
Conversion factors may be applied to all units of measure (except %FS unit) via
LCD/Keypad or serial communication interface.
The following three parameters are available for this function:
K-Factor Mode: Disable, Internal Index, User-Defined (default Disabled)
Internal K Factor Index: 1 – 22 (from internal K-Factor table)
User-Defined K-Factor: 0.001 – 999.9 (default value is 1.000)
NOTE: The conversion factors will not be applied for % FS engineering unit.
Submenu “Alarm Settings”
GFT2 provides the user with a flexible alarm/warning system that monitors the Fluid
Flow for conditions that fall outside configurable limits, as well as visual feedback for the user via the LCD or via an optically-isolated output. The Flow Alarm has several attributes which may be configured by the user via LCD/Keypad or serial communication interface. These attributes control the conditions which cause the alarm to occur and to specify actions to be taken when the flow rate is outside the specified conditions.
Depending on the GFT2 function configuration (flow meter or controller) there are two Alarm algorithms. If GFT2 is configured as flow meter, flow Alarm conditions become true when the current flow reading is equal to or higher/lower than corresponding values of high and low flow Alarm levels. If GFT2 is configured as flow controller, flow Alarm conditions become true when difference between Set
Point value and current flow reading is equal or higher/lower than corresponding values of High and Low Flow Alarm levels.
Alarm actions can be assigned with preset Delay Interval (0-3600 seconds) to activate the optically-isolated output (separate for High and Low alarm). Latch
Mode control feature allows each optical output to be latched on or follow the corresponding alarm status.
The following settings are available for Flow Alarm (see Figure 10): a) Flow Alarm Mode (Tabular entry)
This function determines whether Flow Alarm is Enabled or Disabled. The following sections are available: Enabled or Disabled. The default entry is Disabled. Alarm
Mode selections can be set with the UP and DN buttons and are accepted by pressing ENT button.
b) Low Flow Alarm (Numerical entry)
The limit of required Low Flow Alarm value can be entered in increments of 0.1% from 0 – 100% FS.
If a Low Alarm occurs and one of the two optional outputs is assigned to the Low
Flow Alarm Event, the optically-isolated output will be activated:
1) For Flow Meter Function: when the flow is less than the Low Flow Alarm value.
2) For flow controller function: when the absolute difference between Set Point value and actual flow reading is equal or more than the Low Flow Alarm value and
Actual Flow value is less than Set Point value.
The Low Flow Alarm condition is also indicated on the corresponding Process
Information Screen displaying L character.
NOTE: For Flow Meter function, the value of the Low Flow Alarm must be less than the value of the High Flow Alarm c) High Flow Alarm (Numerical entry)
The limit of required High Flow Alarm value can be entered in increments of 0.1% from 0 – 100% FS. If a High Alarm occurs and one of the two optical outputs is assigned to the High Flow Alarm Event, the optically-isolated output will be activated for: a) Flow Meter function: when the flow is more than the High Flow Alarm value.
b) Flow Controller function: when absolute difference between Set Point value and
Actual Flow reading is equal or more than the High Flow Alarm value and actual flow value is more than Set Point value.
The High Flow Alarm condition is also indicated on the corresponding Process
Information Screen by displaying H character.
NOTE: For Flow Meter function, the value of the High Flow Alarm must be more than the value of the Low Flow Alarm.
d) Flow Alarm Action Delay (Numerical entry)
The Flow Alarm Action Delay is a time in seconds that the Flow Rate value remain sabove the high limit or below the low limit before an alarm condition is validated.
Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).
e) Flow Alarm Action Latch (Tabular entry)
The Flow Alarm Action Latch settings controls the Latch feature. If optically-isolated output is assigned to the Flow Alarm Event, in some cases, the Flow Alarm Latch feature may be desirable.
The following settings are available: Disable or Enable. By default, Flow Alarm is non-latching. That means the alarm is indicated only while the monitored Flow
Value exceeds the specified set conditions.
Submenu “Totalizer #1”
GFT2 provides the user with two independent Programmable Flow Totalizers. The total volume of the flowing fluid is calculated by integrating the actual instantaneous fluid flow rate with respect to time. Totalizer #1 (main totalizer) value is stored in the
EEPROM and saved every (1) second. In case of power interruption, the last saved
Totalizer value will be loaded on the next power on cycle, so main totalizer reading will not be lost. Use the “Totalizer Menu” to navigate to the “Totalizer #1” menu option. The following settings are available for Totalizer #1 (see Figure 10).
a) Totalizer #1 Mode (Tabular entry)
This option determines whether Totalizer #1 is Enabled or Disabled. The following selections are available: Enabled or Disabled. The default entry is Disabled.
Totalizer #1 Mode selections can be set with the UP and DN buttons and are accepted by pressing ENT button.
NOTE: Before enabling the Totalizer, ensure that all totalizer settings are configured properly. Totalizer Start values have to be entered in the currently active
Volumetric or Mass flow engineering unit. The Totalizer will not totalize until the
Process Flow Rate becomes equal to or more than the Totalizer Start value.
Totalizer Event values must be entered in currently active volume or mass based engineering units. If the Totalizer Event at preset total volume feature is not required, set Totalizer Event value to zero (default settings).
b) Totalizer #1 Flow Start (Numerical entry)
This option allows the totalizer to start at a present flow rate. The Totalizer #1 will not totalize until the process flow rate becomes equal to or more than the Totalizer
#1 Flow Start value. The limit of required Totalizer #1 Flow Start value can be entered in increments of 0.1% from 0 to 100% FS.
c) Totalizer #1 Action Volume (Numerical entry)
This option allows the user to activate preset required action when the totalizer reaches a preset volume. Totalizer #1 Action Volume value must be entered in currently active volume/mass based engineering units. Totalizer #1 action event becomes true when Totalizer #1 reading is more or equal to preset "Totalizer #1
Action Volume”. If the Totalizer #1 Action at preset total volume feature is not required, set “Totalizer #1 Action Volume” value to zero (default settings).
d) Totalizer #1 Power On Delay (Numerical entry)
Sometimes it is convenient to start the Totalizer only after specified power up delay interval. Most of the mass flow meters and controllers require some warm up time from the power up event in order to stabilize process variable output and get accurate reading. “Totalizer #1 Power On Delay” option allows set specified time interval which must elapse from the device power up event before Totalizer will be activated. Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).
e) Totalizer #1 Auto Reset (Tabular entry)
This option allows to automatically reset Totalizer #1 when it reaches preset Action
Volume value. This feature may be convenient for batch processing, when predefined volume of the fluid must be repeatedly dispensed into the process. The following selections are available: Enabled or Disabled.
The default entry is Disabled. Totalizer #1 Auto Reset selections can be set with the
UP or DN buttons and are accepted by pressing ENT button.
f) Totalizer #1 Auto Reset Delay (Numerical entry)
This option may be desirable when “Totalizer #1 Auto Reset” feature is enabled.
Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).
g) Reset Totalizer #1 (Numerical entry)
The Totalizers #1 reading can be reset by selecting “Reset Totalizer #1” menu option. A typical display with Totalizer #1 Reset screen is shown in Figure 14.
Figure 14
Once the “YES” option is selected, Totalizer #1 will be reset and the following confirmation screen will appear:
Figure 15
Submenu “Totalizer #2”
The Totalizer #2 (pilot totalizer) value is stored in the flow meter volatile memory
(SRAM) and saved every 100 milliseconds (0.1 second). In case of power interruption, the Totalizer #2 volume will be lost (reset to zero). It is preferable to use Totalizer #2 for short term process flow calculation (for example: batch processing). Use the “Totalizer Menu” to navigate to “Totalizer #2” menu option. The following settings are available for Totalizer #2 (see Figure 10): a) Totalizer #2 Mode (Tabular entry)
This option determines whether Totalizer #2 is Enabled or Disabled. The following selections are available: Enabled or Disabled. The default entry is Disabled.
Totalizer #2 Mode selections can be set with the UP and DN buttons and are accepted by pressing ENT button.
NOTE: Before enabling the Totalizer, ensure that all Totalizer settings are configured properly. Totalizer Start values must be entered in currently active
Volumetric or Mass flow engineering unit. The Totalizer will not totalize until the process flow rate becomes equal to or more than the Totalizer Start value. Totalizer
Event values must be entered in currently active volume or mass based engineering units. If the Totalizer Event at preset total volume feature is not required, then set Totalizer Event value to zero (default settings).
b) Totalizer #2 Configuration (Tabular entry)
Totalizer #2 can be configured to count up or down. When configured to count down, be sure “Totalizer #2 Action Volume” parameter is set to the desired value of more than zero. In this case Totalizer #2 Action Event will be activated when the totalizer counts down to zero. The following selections are available: Count UP or
Count DN. The default entry is Count UP. Totalizer #2 configuration selections can be set with the UP and DN buttons and are accepted by pressing ENT button.
c) Totalizer #2 Flow Start (Numerical entry)
This option allows the start of the totalizer at a preset flow rate. The Totalizer #2 will not totalize until the process flow rate becomes equal to or more than the Totalizer
#2 Flow Start value. The limit of required Totalizer #2 Flow Start value can be entered in increments of 0.1% from 0 -100%FS.
d) Totalizer #2 Action Volume (Numerical entry)
This option allows the user to activate preset required action when totalizer reaches a preset volume when totalizer configured to count up, or zero value when totalizer configured to count down. Totalizer #2 Action Volume value must be entered in currently active volume/mass based engineering units. When set to count up,
Totalizer #2 Action Event becomeS true when the totalizer #2 reading is more or equal to preset “Totalizer #2 Action Volume”. If the Totalizer#2 Action at preset total volume feature is not required, set “Totalizer #2 Action Volume” value to zero
(default settings).
NOTE: When Totalizer #2 is configured to count down, be sure “Totalizer #2 Action
Volume” value is set to any value more than zero.
e) Totalizer #2 Power On Delay (Numerical entry)
Sometimes it is convenient to start Totalizer only after specified power up delay interval. Most of the mass flow meters and controllers require some warm up time from the power up event in order to stabilize process variable output and get accurate reading. “Totalizer #2 Power On Delay” option allows set a specified time interval which must elapse from the device power-up event before Totalizer will be activated. Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).
f) Totalizer #2 Auto Reload (Tabular entry)
This option allows to automatically reset/reload Totalizer #2 when it reaches preset
Action Volume value (when configured to count UP) or zero value (when configured to count Down). This feature may be convenient for batch processing when predefined volume of the fluid must be repeatedly dispensed into the process. The following selections are available: Enabled or Disabled. The default entry is
Disabled. Totalizer #2 Auto Reload selections can be set with the UP and DN buttons and are accepted by pressing the ENT button.
g) Totalizer #2 Auto Reset Delay (Numerical entry)
This option may be desirable when “Totalizer #2 Auto Reload” feature is enabled.
Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).
h) Reset Totalizer #2 (Numerical entry)
Totalizers #2 reading can be reset by selecting “Reset Totalizer #2” menu option. A typical display with Totalizer #2 Reset screen is shown below.
Figure 16
Once “YES” option is selected, the Totalizer #2 will be reset and the following confirmation screen will appear.
Figure 17
Submenu “Pulse Output”
The flow Pulse Output is operating independently from totalizers and, based on configuration settings (see Figure 10), can provide pulse frequency proportional to instantaneous fluid flow rate.
The LCD/keypad and serial communication interface commands are provided to:
• Enable/Disable Pulse Output
• Start Pulse Output at preset flow rate (0.0 – 100.0%FS.
• Configure the Unit/Pulse value (in current engineering units)
• Configure Pulse Active On Time (10 – 6553 milliseconds)
NOTE: The Pulse Output minimum Active On time is 10 milliseconds (.01 second).
The Optical Pulse Output cannot operate faster than one pulse every 100 millisecond (.1 second). A good rule to follow is to set the Unit/Pulse value equal to the maximum flow in the same units per second. This will limit the pulse rate to no faster than one pulse every second.
For example: Maximum flow rate = 1200 kg/min
(1200 kg/min = 20 kg/sec)
If unit per pulse is set to 1200 kg/pulse, the Optical Pulse
Output will pulse once every minute.
If unit per pulse is set to 20 kg per pulse, the Optical Pulse Output will pulse once every second.
The Optically-Isolated Pulse Output incorporate Pulse Output queue, which accumulate pulses if the Pulse Output is accumulating process flow faster than the
Pulse Output hardware can function. The queue will allow the pulses to “catch up” later if the flow rate decreases. A better practice is to slow down the Pulse Output by increasing the value in the Unit/Pulse setting in the Pulse Output menu (see
Figure 10).
NOTE: If Pulse Output feature is required, one of the Digital Optically- solated outputs must be assigned to “Pulse Output” function. Pulse output signal will be accessible via corresponding Digital Optically-Isolated output on the screw terminal header J1 (see Wiring Diagrams).
Submenu “Opt. Outputs Settings”
Two sets of optically-isolated digital outputs are provided to actuate user-supplied equipment. These are programmable via digital interface or LCD/Keypad such that the outputs can be made to switch when a specified event occurs (e.g. when a Low or High Flow Alarm limit is exceeded or when the Totalizer reaches a specified value) or it may be directly controlled by user.
The user can configure each optical output action from 9 different options:
• Disabled: No Action (output is not assigned to any events and is not energized)
• Low Flow Alarm
• High Flow Alarm
• Range between High and Low Flow Alarm settings
• Totalizer #1 reading exceed set limit
• Totalizer #2 reading exceed set limit
• Pulse Output function
• Diagnostic: Output will be energized when any of the Diagnostic or System events are active
• Manual On Control: Output will be energized until Disabled option will be selected.
By default, both optically-isolated outputs are disabled.
NOTE: Optically-isolated outputs are accessible via screw terminal header J1 and require application of external DC voltage across terminals. See Wiring Diagrams.
Submenu “Display Settings”
Process Information screens can be configured to be static (manual control) or dynamic (automatic sequencing). In the static mode pressing the UP button allows the user to page through the PI screens in the forward direction, pressing DN button pages through the PI screens in the reverse direction. When the last PI screen is reached, the firmware “wraps around” and scrolls to the initial PI screen once again.
NOTE: PI screens which are masked in the Screen Mask Register (see below) will be skipped.
Use the “General Settings” menu to navigate to “Display Settings” menu option
(see Figure 10).
The following settings are available for LCD Display: a) Display Mode (Tabular entry)
This option determines whether Display screens are in static (manual control) or dynamic (automatic sequencing) mode. The following selections are available:
Static or Dynamic. The default entry is: Static (manual control). Display screens mode parameter can be set with the UP and DN buttons and are accepted by pressing ENT button.
b) Screen Cycle Time (Numerical entry)
This menu selection defines time interval in seconds for each PI screen to be displayed in the dynamic mode (automatic sequencing). Screen Cycle Time can be set to any value in the range between 1 to 3600 seconds (1 hour, numerical entry).
c) Screen Mask (Tabular entry)
Using Screen Mask settings the user can enable (unmask) or disable (mask) up to
4 different process variable combinations (see Figure 1). By default the unit is shipped from the factory with all PI screens enabled. A typical display with Screen
Mask selection is shown below.
In the example shown above, all PI screens are enabled. Each PI screen assigned to a corresponding bit in the PI Screen Register. In order to change PI Screen mask settings, the user should select the desired screen using UP and DN buttons and then press RIGHT button. The asterisk will appear/disappear on the right side of the corresponding screen. The asterisk represents that the screen is enabled. In order to disable the screen, the corresponding asterisk must be removed. Use the ENT button to accept and save new PI Screen Mask settings in the device’s nonvolatile memory.
NOTE: PI Screen #1 cannot be disabled (unmasked).
d) Display Back Light (Numerical entry)
Using Display Back Light settings the user can adjust the desired level of the LCD back light. The backlight has 19 different levels. Use UP and DN buttons to adjust back light level and press ENT button to accept and save back light level settings in the device’s nonvolatile memory.
Figure 18
e) Display Contrast (Numerical entry)
Using Display Contrast settings, the user can adjust the desired level of the LCD contrast. The contrast has 16 different levels. Use UP and DN buttons to adjust contrast level, and press ENT button to accept and save contrast level settings in the device’s nonvolatile memory.
NOTE: By default, the contrast level is set to 6, which is the optimal level for room temperature (20°C or 70°F).
Submenu “Device Function”
This menu selection allows the selection of GFT2 function according to the mated device type. If GFT2 is connected to the flow meter, then the “Meter” function must be selected. If GFT2 is connected to the flow controller, then “Controller” function must be selected.
NOTE: Based on “Device Function” (device function as flow meter or flow controller) settings, different parameters may be displayed in the Process
Information (PI) screen (see Figure 1) and different features of the GFT2 device may be enabled or disabled (set point control only enabled when GFT2 is configured as flow controller). Also, some features (e.g. Flow Alarm) may have different behavior. Make sure the “Device Function” parameter is set according to the actual device being used.
Submenu “Communication Settings”
This menu selection allows the configuration of a serial communication interface speed (Baud rate) and device RS-485 bus address (only applicable for optional RS-
485 interface). The following settings are available for “Communication Settings”
(see Figure 10).
a) Baud Rate Settings (Tabular entry)
The Baud Rate Settings (Tabular entry) option determines device serial communication interface speed (Baud rate) and can be set to one of the following:
1200, 2400, 4800, 9600, 19200, 38400, 57600, or 115200.
By default, the device shipped from the factory with Baud rate set to 9600.
NOTE: The Baud rate set on the GFT2 device should always follow the Baud rate of the host PC or PLC it is connected to.
b) RS-485 Bus Address (Numerical entry)
The standard GFT2 comes with an RS-232 interface. The optional RS-485 interface has two hexadecimal characters of the address, which must be assigned.
By default, each flow meter is shipped with RS-485 address set to 11 hexadecimal.
When more than one device is present on RS-485 bus, each device should have a unique address. The two characters of the address in the hexadecimal representation can be changed from 01 to FF.
NOTE: Address 00 is reserved for global addressing. Do not assign the global address for any device. When command with global address is sent, all devices on the RS-485 bus execute the command, but do not reply with an acknowledge message.
NOTE: Do not assign the same RS-485 address for two or more devices on the same RS-485 address for two or more devices on the same RS-485 bus. If two or more devices with the same address are connected to the one RS-485 network, a communication collision will take place on the bus, and communication errors will occur.
Submenu “Device Calibration”
The Calibration Menu contains the parameters, which have to be set according to flow meter/controller being used and according to required process conditions.
These values should be changed only by properly trained personnel. Device
Analog Output and Input calibration was performed on the factory and should not be initiated unless recommended by factory personnel. Following settings are available for “Device Calibration” menu selection: a) Full-Scale Range (Numerical Entry)
The Full-Scale Range value in liter per minute (L/min) should be set equal to the full-scale range (converted to L/min) of the device mated to GFT2. The analog input and output will be scaled automatically to this value. For example, if Full-Scale
Range value set to 10.0 L/min and device is configured for 0-5 VDC analog input, when 5.0 VDC is applied to GFT2 analog input the PI flow rate will indicate 100.0%
FS. (if %FS units of measure is selected).
NOTE: Failure to set Full-Scale Range parameter in L/min equal to the full-scale range (converted to L/min) of the device mated to GFT2 may cause erroneous readings and unexpected device behavior.
b) Low Flow Cut-Off (Numerical entry)
The low flow cut-off can be selected between 0.0 and 10.0 % of the full-scale range.
Flows less than the cut-off value are internally driven to zero and not totalized.
Default value of the “Low flow Cut-Off” parameter is zero (disabled).
c) Flow Power Up Delay (Numerical entry)
Sometimes it is convenient to start the process of the input signals after the specified power up delay interval. Most mass flow meters and controllers require some warm up time from the power up event in order to stabilize process variable output and get accurate reading. “Flow Power UP Delay” option allows set specified time interval, which has to elapse from the device power up event before processing of the input signals will be activated. During active faze of the Power Up
Delay, the flow rate will be internally driven to zero and not totalized. Valid settings are in the range of 0 to 3600 seconds (1 hour, default value is 0, no delay).
d) Fluid Std. Density (Numerical entry)
The density of the flowing fluid at standard temperature and pressure conditions should be in g/L. This parameter is used only when mass-based engineering units are selected. Valid settings are in the range of 0.000001 to 10000.0 g/L. Factory set default value is 1.25 g/L (Nitrogen).
e) Analog Output Calibration
NOTE: The analog outputs available on the GFT2 were calibrated at the factory.
There is no need to perform analog output calibration unless the DAC IC, output amplifier IC, or passive components from analog output circuitries were replaced.
Any alteration of the analog output scaling variables in the EEPROM table will
VOID calibration warranty supplied with the instrument.
The GFT2 analog output calibration involves calculation and storing the off set and span variables in the EEPROM based on two calibration points (0 and 100%FS).
The 0 to 5 (0 to 10) VDC output has only scale variable and 4 to 20 mA output has offset and scale variables.
Power up the GFT2 instrument for at least 15 minutes prior to commencing the calibration procedure. Observe analog output jumper position (see GFT2
Input/Output Configuration Jumpers) and connect the corresponding type of measurement device to pins 5 (+) and 8 (-) of the 9-pin D-connector. Follow firmware prompts and adjust calibration point values according to measurement device reading. If calibration must be aborted, press ESC button. When calibration is completed, firmware will display new offset and span values and ask, “Press ENT button to save new calibration variables to EEPROM or ESC to abort calibration and exit without saving.” In the end, the firmware will prompt the confirmation message.
f) Analog Input Calibration
NOTE: The analog inputs available on the GFT2 were calibrated at the factory.
There is no need to perform analog input calibration unless the CPU IC, input amplifier IC, or passive components from analog input circuitries were replaced.
Any alteration of the analog input scaling variables in the EEPROM table will VOID calibration warranty supplied with the instrument.
The GFT2 analog output calibration involves calculation and storing the offset and span variables in the EEPROM based on two calibration points (0 to 100% FS.).
The 0 to 5 (0 to 10) VDC output has only scale variables and the 4 to 20 mA output has offset and scale variables.
NOTE: Check the actual input jumper configuration before applying any input signal to the GFT2. Make sure the input signal does not exceed maximum allowed level for corresponding input type (see Table 2). Do not apply voltages above 5.0
VDC unless GFT2 input was specifically configured on the factory for 0 to 10 VDC
(check actual model number and specification). Exceeding maximum allowed input level may cause inadvertent damage to the device circuitry.
Power up the GFT2 instrument for at least 15 minutes prior to commencing the calibration procedure. Observe the analog jumper position (see GFT2 Input/Output
Configuration Jumpers) and the connect corresponding type of calibration signal source device to pins 4 (+) and 8 (-) of the 9-pin D-connector. Follow firmware prompts and apply calibration point values according to the on-screen instructions.
If calibration has to be aborted, press ESC button. When calibration is completed, firmware will display new offset and span values and ask, “Press ENT button to save new calibration variables to EEPROM or ESC to abort calibration and exit without saving.” In the end, the firmware will prompt a confirmation message.
g) Pilot Calibration Timer
The Pilot Calibration timer accumulates operational hours since the last time the unit was calibrated. The smallest increment value is 0.1 hour (6 minutes). The value of the timer may be reset by the user by pressing RIGHT button. Once RIGHT button is pressed, the confirmation screen will appear with the “Yes” or “No” menu.
Selecting “Yes” will reset the pilot calibration timer back to zero.
Submenu “Signal Conditioner”
A noise reduction filter algorithm (Running Average or Noise Reduction Filter) is now available in the flow meter when pulsating flow or especially noisy signals are encountered. The Flow Linearizer algorithm is also available when flow linearity must be improved.
The following settings are available for “Program Set Point” (see Figure 10): a) Program Set Point Mode (Tabular entry)
This function determines whether the Program Set Point is Enabled or Disabled.
The following selections are available: Enabled or Disabled. The default entry is
Disabled. Program Set Point Mode selections can be set with the UP and DN buttons and are accepted by pressing ENT button.
b) Program Set Point Loop Mode (Tabular entry)
This function determines whether Program Set Point Loop is Enabled or Disabled.
If Loop is enabled, when program reaches the last step it wraps around and again starts execution from the first enabled step. The following selections are available:
Enabled or Disabled. The default entry is Disabled. Program Set Point Loop Mode selections can be set with the UP and DN buttons and are accepted by pressing
ENT button.
c) PSP Steps Mask (Tabular entry)
Using PSP Steps Mask settings, the user can enable (unmask) or disable (mask) any step in the program. If the step is masked, the program will skip it and move to the next enabled step. By default the unit is shipped from the factory with all program steps enabled (unmasked). A typical display with PSP Steps Mask selection is shown below.
The following diagnostic events are supported:
11
12
13
14
8
9
6
7
10
Event
Number
3
4
1
2
5
Diagnostic and Alarm Events Description
CPU Temperature Too High
High Flow Alarm
Low Flow Alarm
Range Between High and Low
Totalizer #1 Exceed Set Event Volume Limit
Totalizer #2 Exceed Set Event Volume Limit
Optical Pulse Output Queue Overflow
Flow Rate Above Limit
Vcc Power Voltage Out of Range
Serial Communication Error
EEPROM Error
Power On Event (Power On Delay Time > 0)
Password Event
Fatal Error
Table 5
LCD BIT Code
0
1
2
3
4
5
6
7
8
9
A
B
C
D
NOTE: Any Alarm or Diagnostic events that may have occurred (Event 0 to Event
D) are stored in the internal status register. All detected events (if corresponding bit in the latch register is not masked) remain stored until the register is manually reset
(by keypad or by means of the serial communication interface). If event corresponding bit in the latch register is masked (disabled), the event will be indicated as long as it is active (no latching). The status Alarm Event Register is mapped to the SCRAM (volatile memory). In case of power interruption, the status
Event Register will be automatically reset.
The following settings are available for “Event Register Menu” (see Figure 10): a) Event Register Status (Read Only)
Each active Alarm event will be indicated on the LCD screen. Also, the total number of currently active events will be displayed on the first line (header). A typical display without active diagnostic and Alarm Events is shown below.
Figure 19
In the example shown above, all PSP Steps are enabled. Each PSP Step assigned to a corresponding bit in the PSP Steps Register. In order to change PSP Step mask settings, the user should select desired stop using UP and DN buttons and then press RIGHT button. The asterisk will appear/ disappear on the right side of the corresponding step. The asterisk represents that step is enabled. In order to disable step, the corresponding asterisk has to be removed. Use ENT button to accept and save new PSP Steps mask settings in device non volatile memory.
d) PSP Steps Settings (Numerical entry)
Using PSP Steps Settings menu selection, the user can assign required set point and time values for each step in the program. A typical display with PSP Steps
Settings selection is shown below.
Figure 21
A typical display with two active events is shown below.
Figure 20
In the example shown above, Step 01 is selected. For each step there are two parameters: set point value in % FS and time interval in seconds. In order to change PSP Step settings user should select desired step using UP and DN buttons and then press ENT button. The cursor in the selected (highlighted) parameter will start flashing. Use UP, DN, LEFT, RIGHT buttons to adjust desired value and then press ENT button to accept and save new PSP Step Settings in the device’s nonvolatile memory.
Submenu “Event Register Menu”
GFT2 is equipped with a self-diagnostic Alarm Event Register which is available via digital interface and on screen LCD indication. Use the “Diagnostic Menu” to navigate to “Event Register Menu” menu option.
Figure 22
If more than 7 events are displayed, the user can use UP and DN buttons to scroll and see all indicated events. If event is not latched in the Event Latch Mask register, it may appear and disappear from the status screen, so it will be indicated as long as the actual event is taking place.
b) Event Latch Mask (Tubular entry)
Using Event Latch Mask settings, the user can enable (unmask) or disable (mask) latch feature individually for each event. The event is enabled if there is an asterisk sign [*] set on the right across corresponding event. If event is not latched (no asterisk across corresponding event) it may appear and disappear from the status screen, so it will be indicated as long as the actual event is taking place. By default, the unit is shipped from factory with only one event active: 0 – CPU Temperature too high. For all other events, the latch feature is disabled. A typical display with
Event Latch Mask selection is shown below.
Figure 23
In Figure 23, latch features for all events are disabled except event #0. In order to change Event Latch Mask Settings the user should select desired event using UP and DN buttons and then press RIGHT button. The asterisk will appear/disappear on the right side of the corresponding event. The asterisk represents that the latch feature is enabled. In order to disable latch feature, the corresponding asterisk has to be removed. Use the ENT button to accept and save new Event Latch mask settings in the device’s non volatile memory.
c) Event Register Mask (Tabular entry)
Using Event Register Mask Settings user can individually enable (unmask) or disable (mask) each event. The event is enabled if an asterisk sign [*] is set on the right across from corresponding event. If the event is disabled, it will not be processed or indicated in the Events Status Register, even if actual conditions for event have occurred. By default the unit is shipped from the factory with only one event active: “0 – CPU Temperature too high”. All other events are disabled. A typical display with Event Register Mask selection is shown below.
a) ADC Input Counts (Read Only)
This menu selection provides raw, average, and filtered values of the ADC counts for analog input circuitry (read only). A typical display with the ADC Input Counts screen is shown below.
Figure 27 b) Analog Output Values (Read Only)
This menu selection provides information about currently selected analog output configuration and DAC counts for analog output circuitry (read only). A typical display with DAC Output Values screen is shown below.
Figure 24
In the example shown above, all events are disabled except event #0. In order to change Event Register Mask Settings, the user should select the desired event using UP and DN buttons and then press the RIGHT button. The asterisk will appear/disappear on the right side of the corresponding event. The asterisk represents that the event is enabled. In order to disable the event, the corresponding asterisk has to be removed. Use the ENT button to accept and save the new Event Register Mask Settings in the device’s nonvolatile memory.
d) Reset Event Register (Tabular entry)
The Event Register can be reset by selecting “Reset Event Register” menu option.
A typical display with the Reset Event Register screen is shown below.
Figure 28 c) LCD Back Light Settings (Read Only)
This menu selection provides information about the LCD back light level, PWM duty cycle, and contrast (read only). A typical display with the LCD Back Light Settings screen is shown below.
Figure 25
Once the “YES” option is selected, the Event Register will be reset and the following confirmation screen will appear.
Figure 29 d) Pulse Output Queue (Read Only)
This menu selection provides information about the Pulse Output Queue. A typical display with the Pulse Output Queue screen is shown below.
Figure 26
Submenu “Diagnostic Menu”
The Diagnostics Menu can be used for troubleshooting purposes and provides information about the device’s internal variables. These items (except the Events
Register submenu described above) are informational only and may not be changed (read only).
Figure 30 e) CPU Temperature (Read Only)
This menu selection provides the current value of the PCB and CPU temperature in °C (read only). A typical display with the CPU Temperature reading is shown below.
Figure 31
Installation
General Directions
• Mounting, electrical installations, parameters configuration, startup, and maintenance of this instrument may only be performed by trained personnel.
Personnel must read and understand this operating manual before performing any installation or configuration steps.
• The GFT2 device should only be operated by trained personnel. All instructions in this manual are to be observed.
• Ensure that power and all input/output signals are correctly wired up according to the wiring diagram provided in this manual. The housing of the device should only be opened by trained personnel.
Hardware Installation
NOTE: Electrostatic discharge may cause permanent damage to the electronic circuitry. Before installing or connecting any wires, the installer must discharge himself by touching the building’s protective Earth ground.
The GFT2 Totalizer Input/Output Flow Monitor/Controller can be attached
(mounted) to the Dwyer GFM series flow meters, GFC series controllers, or used stand alone (panel mounted or table-top installation).
Connecting GFT2 to GFM Series Flow Meter a) Mounting
Use the GFM mounting kit (See Table 4) to attach GFT2 to the GFM flow meter. b) Electrical Connection
GFM flow meters have three different output interfaces (0 to 5, 5 to 10 VDC, 4 to
20 mA), which can be used to provide flow input signal to the GFT2.
Figure 32: Connecting GFT2 to the GFM using 0-5 VDC output from DB9 connector
Figure 33: Connecting GFT2 to the GFM using 5-10 VDC output from RJ11 connector.
An optional cables kit assembly is available for order:
Model
A-646
Description
Flow Meter Mounting Kit, No Cables c) Input/Output Jumper Configuration
Figure 34: Connecting GFT2 to the GFM using 4-20mA output from DB9 connector.
NOTE: If “Full-Scale Range”, “Device Function”, and “Fluid Std. Density” parameters are not set properly, the device may have erroneous readings and unpredictable behavior.
User may configure other parameters according to individual preferences and application requirements.
NOTE: The GFT2 device input/output jumpers were configured at the factory according to the order. There is no need to change input/output jumpers configuration unless a different input is being used. Before applying power and process signals, make sure the input/output jumpers are installed in the correct positions. See Table 6.
Input/Output Jumper Configuration Options for GFM Series Flow Meters
PV Input
Type
(GFT2 Input)
0 to 5 VDC
0 to 10 VDC
4 to 20 mA
J2A
2 to 3
2 to 3
2 to 3
J2B
J2 Jumper Configuration
5 to 6
5 to 6
5 to 6
J2C
8 to 9
8 to 9
8 to 9
J2D
10 to 11
11 to 12
10 to 11
J2D
14 to 15
14 to 15
13 to 14
J2F
17 to 18
17 to 18
16 to 18
Note
249 Ω passive, not isolated current output
Table 6 d) Parameters Configuration
The following parameters must be configured:
• Device Function (see Submenu “Device Function”). “Meter function has to be selected.
• Full-Scale Range (see Submenu “Device Calibration”). Full-Scale Range parameter has to be set equal to the GFM full-scale flow rate in L/min.
• Fluid Std. Density (see Submenu “Device Calibration”). This parameter is required only when mass-based engineering units are selected.
Connecting GFT2 to GFC Series Flow Controller a) Mounting
Use GFC mounting kit (see Table 7) to attach GFT2 to the GFC flow controller (see
Figure 35).
b) Electrical Connection
GFC flow controllers have two output interfaces: 0 to 5 VDC and 4 to 20 mA which can be used to provide flow input signal to GFT2. They also support two analog input signals: 0 to 5 VDC and 4 to 20 mA (jumper selectable on the GFC PC board).
Figure 35: Connecting GFT2 to the GFC Using 0 to 5 VDC Input/Output from DB15 Connector.
Figure 36: Connecting GFT2 to the GFC Using 4 to 20 mA Input/Output from DB15 Connector.
Based on interface being used and power supply option, optional cable kit assemblies are available for order. See Table 7 for optional GFC cable kit assemblies.
Optional GFC Power Supply/Cables and Mounting Kit Assemblies
Kit Part
Number
GFT2-20C
A-645
Description
Shielded cable with plug 110 VAC to
12 VDC power supply, communication branch
GFC flow controller mounting kit, no cables, no power supply
GFT2
Input/Output
0 to 5 VDC
N/A
Communication
Interface Cable
Yes
N/A
GFC Power
Supply Option
12 VDC Only
N/A
Table 7 c) Input/Output Jumper Configuration b) Electrical Connection
GFT2 can be used with any generic flow meter/controller which can support 0 to 5
VDC and/or 4 to 20 mA input/output interfaces. It can also be ordered for 0 to 10
VDC input/output interface (special order, not supported by generic models).
NOTE: Do not connect GFT2 input/output circuitry to voltages above 5.5 VDC unless GFT2 was specifically ordered for 0-10 VDC input/output interface. Check device part number or contact Dwyer Instruments customer service for device input.
NOTE: The GFT2 device input/output jumpers were configured at the factory according to the order. There is no need to change the input/output jumper configuration unless a different input is being used. Before applying power and process signals, make sure the input/output jumpers are installed in the correct position. See Table 8.
Input/Output Jumper Configuration Options for GFC Series Flow Controllers
GFT2 PV Type J2 Jumper Configuration
Output
0 to 5 VDC
4 to 20 mA
0 to 10 VDC
Input
0 to 5 VDC
4 to 20 mA
0 to 10 VDC
J2A
2 to 3
1 to 2
2 to 3
J2B
5 to 6
4 to 5
5 to 6
J2C
8 to 9
7 to 8
8 to 9
J2D
10 to 11
10 to 11
11 to 12
J2D
14 to 15
13 to 14
14 to 15
J2F
17 to 18
16 to 17
17 to 18
GFC Cable Kit
GFT2-20C or
A-645
Not supported by
GFC cable kits
Not supported by GFC
Table 8 d) Parameters Configuration
The following parameters have to be configured:
• Device Function (see Submenu “Device Function”). “Controller” function has to be selected.
• Full-Scale Range (see Submenu “Device Calibration”). Full-Scale Range parameter must be set equal to the GFC full-scale flow rate in L/min.
• Fluid Std. Density (see Submenu “Device Calibration”). This parameter is required only when mass-based engineering units are selected.
NOTE: If “Full-Scale Range”, “Device Function”, and “Fluid Std. Density” parameters are not set properly, device may have erroneous reading and unpredictable behavior.
User may configure other parameters according to individual preferences and application requirements.
Connecting GFT2 to Flow Meters/Controllers From Other Manufacturers
(Stand Alone) a) Mounting
When GFT2 is connected to flow meters/controllers from other manufacturers, it can be used as stand alone table top or panel mounted (See Figure 37). On the back side of the GFT2 enclosure, there are 4 tapped holes which are designated to be used for panel-mounted option.
Figure 37
GFT2
GFT2
GFT2
GFT2
Figure 38: Connecting GFT2 to the Generic Flow Meter
GFT2
GFT2
GFT2
GFT2
Figure 39: Connecting GFT2 to the Generic Flow Controller c) Input/Output Jumper Configuration
NOTE: The GFT2 device input/output jumpers were configured at the factory according to the order. There is no need to change input/output jumpers’configuration unless a different input is being used. Before applying power and process signals, make sure the input/output jumpers are installed in the correct position. See Table 9.
d) Parameters Configuration
The following parameters have to be configured
• Device Function (see Submenu “Device Function”). If GFT2 is connected to flow controller, then “Controller” function has to be selected. If GFT2 is connected to the flow meter, then “Meter” function has to be selected
• Full-Scale Range (see Submenu “Device Calibration”). Full-Scale Range parameter must be set equal to the mated device full-scale flow rate in L/min.
• Fluid Std. Density (see Submenu “Device Calibration”). This parameter is required only when mass-based engineering units are selected.
Input/Output Jumper Configuration Options for Generic Flow Meters and Controllers
GFT2 J2 Jumper Configuration
Output
0 to 5 VDC
Input
0 to 5 VDC
J2A
2 to 3
J2B
5 to 6
J2C
8 to 9
J2D
10 to 11
J2D
14 to 15
J2F
17 to 18
4 to 20 mA 4 to 20 mA 1 to 2 4 to 5 7 to 8 10 to 11 13 to 14 16 to 17
NOTE: If “Full-Scale Range”, “Device Function”, and “Fluid Std. Density” parameters are not set properly, device may have erroneous reading and unpredictable behavior
User may configure other parameters according to individual preferences and application requirements.
Troubleshooting
Common Conditions
The GFT2 Totalizer Input/Output Flow Monitor/Controller was thoroughly checked at numerous quality control points during and after manufacturing and assembly operations. It was calibrated according to the input and output configuration. It was carefully packaged to prevent damage during shipment. If instrument is not functioning properly, please check for the following common conditions:
• Are all cables connected correctly?
• Were the connector pin outs matched properly?
• Are J2 input/output jumpers configured correctly?
• Is the power supply correctly selected according to requirements?
When several devices are used, a power supply with appropriate current rating should be selected. When interchanging with other manufacturers’ equipment, cables and connectors must be carefully wired for correct pin configuration.
0 to 10 VDC 0 to 10 VDC 2 to 3 5 to 6 8 to 9 11 to 12 14 to 15 17 to 18
Number
1
2
3
4
5
6
7
8
9
Indication
LCD Display remains blank when unit is powered up. Status LED is OFF.
LCD Displays flow reading, but 4 to 20 mA Set Point output signal does not change.
Fluid flows throught he flow meter/controller, but the LCD Display and/or Totalizer reading does not respond to the flow.
Fluid flows through the flow meter/controller and LCD Display Flow
Rate reading responds to flow, but
Totalizer reading is not changing.
Erratic Flow Rate reading.
Totalizer reading is wrong.
LCD Displays flow reading, but communication interface does not work.
The Device Diagnostic Alarm Event with code 0 - "CPU Temp. High" is active.
The Device System Event with code D -
"Fatal Error" is active.
Likely Reason
Power Supply is bad, or polarity is reversed.
Solution
Measure voltage on pins 2 and 1 of the DB9 interface terminal connnector. If voltage is out of specified range, then replace power supply with a new one. If polarity is reversed (reading is negative), make correct connection.
Return device to factory for repair.
Check J2 jumper configuration (see Table 9).
PC board is defective.
Wrong configuration of J2 Input/Output
Jumpers.
External loop is open, or load resistance is more than 600 Ohm.
External loop is open, or load resistance is more than 600 Ohm.
The fluid flow rate is below set Low Flow Cut-
Off value.
Wrong configuration of J2 Input/Output
Jumpers.
PC board is defective.
The fluid flow rate is below set "Totalizer #1
Flow Start" parameter value.
Totalizer mode is disabled.
Totalizer Power On Delay parameter is set to high value and Totalizer is disabled by firmware.
Wrong configuration of J2 Input/Output
Jumpers.
GFT2 "Full-Scale Flow" parameter value (in
L/min) is not equal to the mated device fullscale range.
GFT2 "Fluid Std. Density" parameter is not set according to fluid being used and mass based engineering units are selected.
Wrong configuration of J2 Input/Output
Jumpers.
GFT2 "Full -cale Flow" parameter value (in
L/min) is not equal to the mated device fullscale range.
Wrong host PC interface or wiring connection.
GFT2 has RS-485 interface but device address does not match addressed used by host PC.
Check for external connections to pins 5 and 6 of the DB9 interface terminal connector. Make sure the loop resistance is less than 400 Ohm for 12 VDC power supply option and 900
Ohm for 24 VDC power supply option.
Using Key Pad, navigate to submenu "Device Diagnostic" and select submenu "Analog Output Value". Record the DAC counts values and consult the factory with findings.
Check settings for Low Flow Cut-Off value and make required adjustment (see Submenu "Low Flow Cut-Off").
Check J2 input jumper configuration (see Table 9). If necessary, contact factory for additional help.
Using ESD precautions, measure voltage on pins 4 and 6 of the
DB9 interface terminal connector. If voltage correlates with flow meter/controller output signal, check ADC counts. Using Key Pad, navigate to Submenu "Device Diagnostic" and selet Submenu
"ADC Input Counts". Record the ADC counts values and consult the factory with findings.
Check settings for "Totalizer #1 Flow Start" value and make required adjustment (see Submenu "Totalizer #1 Flow Start").
Check settings for "Totalizer #1 Mode" parameter. Make sure
Totalizer Mode is set to "Enabled" (see Submenu "Totalizer #1
Mode").
Check settings for "Totalizer Power On Delay" (see Submenu
"Totalizer #1 Power On Delay"). If settings are too high, make required adjustment.
Check J2 input jumper configuration (see Table 9). If necessary, contact factory for additional help.
Check settings for "Full Scale Range" (see Submenu "Device
Calibration"). Full Scale Range parameter has to be set equal to the mated device full scale flow rate in L/min.
Check settings for "Fluid Std. Density" (see Submenu "Device
Calibration"). This parameter is required only when mass-based engineering units are selected.
Check J2 input jumper configuration (see Table 9). If necessary, contact factory for additional help.
Check settings for "Full Scale Range" (see Submenu "Device
Calibration"). Full Scale Range parameter has to be set equal to the mated device full scale flow rate in L/min.
Make sure interface type (RS-232 or RS-485) on the host PC is the same as on the GFT2 device. Check communication wiring connection according to "Digital Communication Interface
Connections".
Change GFT2 RS-485 address to match host PC software settings.
MCU/PCB temperature is too high (overload).
Fatal Error (EEPROM or SRAM corrupted).
Disconnect power from the GFT2. Make sure the ambient temperature is within specified range (below 158°F or 70°C). Let the device cool down for at least 15 minutes. Apply power to the device and check Diagnostic Alarm Event. If overload connection will be indicated again, the unit has to be returned to the factory for repair.
Cycle the power on the GFT2. If System Event with code D indicates again, the unit must be returned to the factory for repair.
72
73
74
75
76
67
68
69
70
71
77
78
79
80
62
63
64
65
66
57
58
59
60
61
52
53
54
55
56
47
48
49
50
51
42
43
44
45
46
37
38
39
40
41
32
33
34
35
36
27
28
29
30
31
22
23
24
25
26
17
18
19
20
21
12
13
14
15
16
7
8
9
10
11
4
5
2
3
6
0
1
Index
APPENDIX A
GFT2 Totalizer Input/Output Flow Monitor/Controller EEPROM Variables uint float float uint uint float uint uint uint uint float float float uint float float uint uint uint uint uint float float uint float uint uint uint float float uint uint float float float uint uint uint uint uint float float uint uint uint float int uint uint uint float uint uint float uint uint int int int float uint uint uint char[4] int
Data Type char[10] char[20] char[20] char[10] float float float float char[12] float float float float uint uint uint
OptOut2_Config
GLCD_Mode
GLCD_Static_Mode
GLCD_AUTO_Mode_Mask
Cycle_Time
GLCD_Contrast
GLCD_Reserved
GLCD_LED_PWM
PSP_StepMasc
PSP_LoopMode
Out_Scale_mA
Out_Offset_mA
In_mA_Mode
In_mA_Reserved
In_Scale_mA
In_Offset_mA
OutScaleV
OutOffsetV
InScaleV
InOffsetV
F_AlarmMode
F_LowAlarmPFS
F_HiAlarmPRS
F_AlmDelay
F_AlarmLatch
F_AlarmSpare
Total1_Mode
Total1_Config
Total1_FlowStart
Total1_VolStop
Total1_PowOnDelay
Total1_ValueLock
Total1_Volume_BkUp
Total1_AutoReset
Total1_AtoResetDelay
Total1_Reserved
Total2_Mode
Total2_Config
Total2_FlowStart
Total2_VolStop
Total2_PowOnDelay
Total2_Volume_BkUp
Name
BlankEEPROM[10]
SerialNumber[20]
ModelNumber[20]
SoftwareVer[10]
ManufReservedF1
ManufReservedF2
ManufReservedF7
ManufReservedF8
ReservedText[12]
ManufReservedF3
ManufReservedF4
ManufReservedF5
ManufReservedF6
ManufReservedUI1
ManufReservedUI2
ManufReservedUI3
ManufReservedUI4
ManufReservedSI1
ManufReservedSI2
ManufReservedSI3
TimeSinceCalHr
TProtectionCode
DeviceFunction
BaudRate
Address485
FlowUnits
UDUnitKfactor
UDUnitTimeBase
UDUnitDensity
KfactorMode
KfactorIndex
UserDefKfactor
DiagEventMask
PSP_Mode
SetPointPFS
DiagEventLatchMask
Reserved3
Reserved4
OptOut1_Config
Notes
Do not modify. Table Revision [PROTECTED]
Serial Number [PROTECTED]
Model Number [PROTECTED]
Firmware Version [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Reserved for Manufacture Specific Text Info [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Manufacture Specific float data [PROTECTED]
Time elapsed since last calibration in hours
Program Parameters Protection Code [0-255]
Device Function: 0-FlowMeter,1-FlowController
Comm. Interface Baud Rate Index [0-7]
Two hexadecimal characters address for RS485 only [01-FF]
Current Units of Measure [0-46]
Current Units of Measure [0-46]
User defined Unit Time base index:[0-3]
User defined Unit use density flag 1-'Y', 0-'N' o-Disabled, 1-Internal, 2-User Defined
Internal K-Factor Index [0-21]
User defined K-Factor
Mask for Diagnostic Events: Clear bit -> mask
Mode for Program SP: 0-disabled, 1-enabled
Set Point value in %FS fraction notation [0.0 - 1.1]
Diagnostic Events Latch Mask register: Clear bit -> mask
Device General Reserved Settings
Device General Reserved Settings
Optical Output #1 Configuration (function)
Optical Output #2 Configuration (function)
Main Process screen mode: 0-Static, 1-Dynamic
Type of the static LCD screen: [0-3]
Type of the AUTO LCD screen: keeps mask for each variable
Time in seconds for each screen to be displayed in Dynamic mode
GLCD Contrast settings [1 - 16]
GLCD reserved settings
GLCD LED backlight PWM Duty cycle [1 - 16]
GLCD reserved settings
Program SP Loop mode:0-disabled, 1-enabled
Analog 4-20 mA Out Scale
Analog 4-20 mA Out Offset
Reserved Input parameter
Reserved Input parameter
Analog 4-20 mA Out Scale
Analog 4-20 mA Out Offset
Flow Analog 0-5/0-10 VDC Out Scale
Flow Analog 0-5/0-10 VDC Out Offset
Flow Analog 0-5/0-10 VDC Input Scale
Flow Analog 0-5/0-10 VDC Input Offset
Flow Alarm Mode (0=Disabled, 1=Enabled)
Low Flow Alarm in PFS [0-1.0 fraction notation %F.S.]
High Flow Alarm in PFS [0-1.0 fraction notation %F.S.]
Delay in seconds 0-3600 for Flow Alarm action
Flow Alarm Latch
Flow Alarm Spare settings
Totalizer #1 mode (0-Disabled, 1-Enabled)
Totalizer #1 configuration (0-Count Up)
Start tot. at flow [0-1.0 fraction notation %F.S.]
Limit volume in %s, 0 = disable
Totalizer #1 power on delay in second [0-3600]
Lock Totalizer #1 value (0-can be reset, 1-can not be reset)
Totalizer #1 backup volume in %s (saved every 6 minutes)
Reset Total. Volume value when Totalizer value equals Limit volume 0 - No, 1 - Yes
Delay in seconds before AutoReset will reset Totalizer#1 volume reading to zero [0-3600]
Totalizer#1 reserved
Totalizer#2 mode: (0-Disabled, 1-Enabled)
Totalizer#2 configuration (0-Count Up, 1-Count Down)
Start tot. at flow [0-1.0 fraction notation %F.S.]
Limit volume in %s, 0 = disable
Totalizer#2 power on delay in seconds [0-3600]
Totalizer#2 backup volume in %s (saved every 6 minutes)
float float float float float float float float float float float float float float float float float float float float float float float uint float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float float uint uint float uint uint uint uint uin float float
Data Type uint uint uint uint uint float float uint uint
FlowTbl[10]. FlowPFSIn
FlowTbl[10]. FlowPFSOut
MDSerialNumber
MeterFSRange
LowFlowCutOff
FlowPowerUpDelay
Density
FluidName[20]
CalibratedBy[20]
CalibratedAt[20]
DateCalibrated[12]
DateCalibratedDue[12]
UserTagName
PSPTbl[0].PFS
PSPTbl[0].Time
PSPTbl[1].PFS
PSPTbl[1].Time
PSPTbl[2].PFS
PSPTbl[2].Time
PSPTbl[3].PFS
PSPTbl[3].Time
PSPTbl[4].PFS
PSPTbl[4].Time
PSPTbl[5].PFS
PSPTbl[5].Time
PSPTbl[6].PFS
PSPTbl[0].Time
PSPTbl[7].PFS
PSPTbl[7].Time
PSPTbl[8].PFS
PSPTbl[8].Time
PSPTbl[9].PFS
PSPTbl[9].Time
PSPTbl[10].PFS
PSPTbl[10].Time
PSPTbl[11].PFS
PSPTbl[11].Time
PSPTbl[12].PFS
PSPTbl[12].Time
PSPTbl[13].PFS
PSPTbl[13].Time
PSPTbl[14].PFS
PSPTbl[14].Time
PSPTbl[15].PFS
PSPTbl[15].Time
EEMagicNumber
Name
Total2_ReloadVolStop
Total2_ReloadDelay
Total2_10SecBackUp
Total2_Reserved
Flow_Pulse_Mode
PulseFlowStart
Units_Per_Pulse
Active_Low_Time
Flow_Pulse_Reserved
FlowCondMode
Flow_NRF_NSample
Flow_NRF_ErrLimit
Flow_NRF_TimeLimit
Flow_Damping
Flow_Window
FlowLinearizer
Flow_SC_Reserved
FlowTbl[0]. FlowPFSIn
FlowTbl[0]. FlowPFSOut
FlowTbl[1]. FlowPFSIn
FlowTbl[1]. FlowPFSOut
FlowTbl[2]. Flow PFSIn
FlowTbl[2]. Flow PFSOut
FlowTbl[3]. Flow PFSIn
FlowTbl[3]. Flow PFSOut
FlowTbl[4]. FlowPFSIn
FlowTbl[4]. FlowPFSOut
FlowTbl[5]. FlowPFSIn
FlowTbl[5]. FlowPFSOut
FlowTbl[6]. FlowPFSIn
FlowTbl[6]. FlowPFSOut
FlowTbl[7]. FlowPFSIn
FlowTbl[7]. FlowPFSOut
FlowTbl[8]. FlowPFSIn
FlowTbl[8]. FlowPFSOut
FlowTbl[9]. FlowPFSIn
FlowTbl[9]. FlowPFSOut
151
152
153
154
155
146
147
148
149
150
141
142
143
144
145
136
137
138
139
140
156
157
158
159
160
161
162
163
131
132
133
134
135
126
127
128
129
130
121
122
123
124
125
116
117
118
119
120
111
112
113
114
115
106
107
108
109
110
101
102
103
104
105
96
97
98
99
100
91
92
93
94
95
86
87
88
89
90
81
82
Index
83
84
85
Notes
Reload VolStop value when Totalizer reading counts down to zero 0 - No, 1 - Yes
Delay in seconds before Reload VolStop value when Totalizer reading counts down to zero [0-3600]
Enable or Disable every 10 seconds EEPROM backup (reserved for future version release)
Totalizer #2 reserved
Flow Pulse Output Mode (0=Disabled, 1=Enabled)
Start pulse output at flow [0-1.0 fraction notation %F.S.]
Units per pulse scaling
Number of ms output will be activated when pulse is developed
Pulse Output Reserved
0 - No conditioning, 1 - NRF, 2 - Running Average
Flow NRF Number of Samples [1 - 32]
Flow NRF Error Value [0.05 10.0] %F.S. (FN)
Flow NRF Time Interval [0-199], 0-disabled
Reading Damping 0-500 ms
Flow running average window [0-32] 0 - disable
Flow Linearizer: On (1), off (0)
Flow Signal Conditioner reserved
Flow Linearizer Index 0 PFS In (must be 0.0)
Flow Linearizer Index 0 PFS Out (must be 0.0)
Flow Linearizer Index 1 PFS In [0.0 - 1.0]
Flow Linearizer Index 1 PFS Out [0.0 - 1.0]
Flow Linearizer Index 2 PFS In [0.0 - 1.0]
Flow Linearizer Index 2 PFS Out [0.0 - 1.0]
Flow Linearizer Index 3 PFS In [0.0 - 1.0]
Flow Linearizer Index 3 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 4 PFS In [0.0 - 1.0]
Flow Linearizer Indes 4 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 5 PFS In [0.0 - 1.0]
Flow Linearizer Indes 5 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 6 PFS In [0.0 - 1.0]
Flow Linearizer Indes 6 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 7 PFS In [0.0 - 1.0]
Flow Linearizer Indes 7 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 8 PFS In [0.0 - 1.0]
Flow Linearizer Indes 8 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 9 PFS In [0.0 - 1.0]
Flow Linearizer Indes 9 PFS Out [0.0 - 1.0]
Flow Linearizer Indes 10 PFS In [0.0 - 1.0]
Flow Linearizer Indes 10 PFS Out [0.0 - 1.0]
Serial Number for Mated Device
Device FS range in Std. L/min
Must be between [0 and 0.1] fraction %F.S. notation [0-1.0]
Flow Power Up delay [0-1200] sec.
Fluid Density g/L
Name of the Fluid used for Calibration
Name of person meter was calibrated by
Name of the Calibration Lab
Calibration date
Date Calibration due
User Defined Device Tag Name or Number
PSP Table Index 0 Set Point PFS (0.0-1.0)
PSP Table Index 0 Time (sec)
PSP Table Index 1 Set Point PFS (0.0-1.0)
PSP Table Index 1 Time (sec)
PSP Table Index 2 Set Point PFS (0.0-1.0)
PSP Table Index 2 Time (sec)
PSP Table Index 3 Set Point PFS (0.0-1.0)
PSP Table Index 3 Time (sec)
PSP Table Index 4 Set Point PFS (0.0-1.0)
PSP Table Index 4 Time (sec)
PSP Table Index 5 Set Point PFS (0.0-1.0)
PSP Table Index 5 Time (sec)
PSP Table Index 6 Set Point PFS (0.0-1.0)
PSP Table Index 6 Time (sec)
PSP Table Index 7 Set Point PFS (0.0-1.0)
PSP Table Index 7 Time (sec)
PSP Table Index 8 Set Point PFS (0.0-1.0)
PSP Table Index 8 Time (sec)
PSP Table Index 9 Set Point PFS (0.0-1.0)
PSP Table Index 9 Time (sec)
PSP Table Index 10 Set Point PFS (0.0-1.0)
PSP Table Index 10 Time (sec)
PSP Table Index 11 Set Point PFS (0.0-1.0)
PSP Table Index 11 Time (sec)
PSP Table Index 12 Set Point PFS (0.0-1.0)
PSP Table Index 12 Time (sec)
PSP Table Index 13 Set Point PFS (0.0-1.0)
PSP Table Index 13 Time (sec)
PSP Table Index 14 Set Point PFS (0.0-1.0)
PSP Table Index 14 Time (sec)
PSP Table Index 15 Set Point PFS (0.0-1.0)
PSP Table Index 15 Time (sec)
Number used to verify EEPROM integrity
13
14
15
16
17
8
9
10
11
12
18
19
20
21
22
5
6
3
4
7
1
Index
2
APPENDIX B
Internal K-Factors Table
Actual Gas
Argon Ar
Arsine AsH3
Boron Triflouride BF3
Bromine Br2
Acetylene D2H2
Cyanogen C2N2
Methane CH4
Chlorine Cl
2
Carbon Dioxide CO
2
Carbonyl Fluoride CoF
2
Carbonyl Sulfide COS
Carbon Disulfide CS
2
Fluorine F2
Hydrogen H
2
Helium He
Nitrous Oxide
Ammonia NH3
Neon NE
Nitric Oxide O2
Sulfur Dioxide SO2
Xenon Xe
1.0106
1.454
0.7128
0.731
1.46
0.99
0.9926
0.69
1.44
K Factor
Relative to N
2
1.4573
0.6735
0.5082
0.8083
0.5829
0.61
0.7175
0.86
0.7382
0.5428
0.6606
0.6026
0.9784
Cp
[Cal/g]
0.1244
0.1167
0.1778
0.0539
0.4036
0.2613
0.5328
0.114
0.2016
0.171
0.1651
0.1428
0.1873
3.419
1.241
0.2088
0.492
0.246
0.2328
0.2193
0.1488
0.0378
APPENDIX C
GFT2 ASCII Commands Set
RS-232/RS-485
The standard GFT2 comes with an RS-232 interface. The protocol described below allows communication with the unit using either a custom software program or a
“dumb” terminal. All values are set as printable ASCII characters. For RS-232 interface, the start character and two characters of address have to be omitted. For the RS-485 interface, the start character is always ‘!’, and two characters of address follow. The command string is terminated with a carriage return (line feeds are automatically stripped out by the GFT2):
RS-485
RS-232
!<Addr>,<Cmd>,Arg1,Arg2,Arg3,Arg4<CR>
Cmd,Arg1,Arg2,Arg3,Arg4<CR>
Where: !
Addr
Cmd
Arg1 to Arg4
CR
Example: !12,F<CR>
Example: F<CR>
Start character **
RS-485 device address in the ASCII representation of hexadecimal (00 through FF are valid). **
The one or two character command from the table below.
The command arguments from the table below.
Multiple arguments are comma delimited.
Carriage return character
Density
[g/L]
1.782
3.478
2.025
7.13
1.162
3.322
0.715
3.163
1.964
2.945
2.68
3.397
1.695
0.0899
0.1786
1.964
0.76
0.9
1.339
1.427
2.858
5.858
**Default address for all units is set to 11 hex. Do not submit start character and device address for RS-232 option.
Several examples of commands follow. All assume that the GFT2 has been configured for address 18 (12 hex) on the RS-485 bus:
1. To get a flow reading:
The device will reply:
2. To get current Flow Alarm status:
The device will reply:
!12,F<CR>
!12,50.0<CR>
(Assuming the flow is at 50.0% FS)
!12,A,S<CR>
!12,AS:N<CR>
(Assuming no alarm conditions)
!12,T,1,R<CR>
!12,T1R:93.5<CR>
3. To get Totalizer#1 reading:
The device will reply:
(Assuming the Totalizer#1 reading is 93.5)
4. Set the flow high and low alarm limit to 90% and 10% of full-scale flow rate:
!12,A,C,90.0,10.0<CR>
The device will reply: !12,AC:90.0,10.0<CR>
UART Error Codes
7
8
5
6
9
1
2
3
4
Not supported command or back door is not enabled
Wrong number of arguments
Address is out of range (MR or MW commands)
Wrong number of the characters in the argument
Attempt to alter Write Protected area in the EEPROM
Proper command or argument not found
Wrong value of the argument
Reserved
Manufacture specific into EE KEY (wrong key or key is disabled)
13
14
15
16
17
8
9
10
11
12
Index
1
2
5
6
3
4
7
18
19
20
21
22
Diagnostic and System Events Codes and Bit Position
A
B
C
D
7
8
5
6
9
Code
0
1
2
3
4
Event Description
CPU Temp. High
High Flow Alarm
Low Flow Alarm
Range betwen H-L
Tot#1 > Limit
Tot#2 > Limit
OptPulse Queue
Flow OverLimit
Vcc OutOfRange
SerComm. ERROR
EEPROM ERROR
Power on Event
Password Event
Fatal Error
Bit Position
0x0001
0x0002
0x0004
0x0008
0x0010
0x0020
0x0040
0x0080
0x0100
0x0200
0x0400
0x0800
0x1000
0x2000
Internal K-Factor Table List
Gas
Ar
AsH3
BF3
Br2
C2H2
C2N2
CH4
Cl2
CO2
COF2
COS
CS2
F2
H2
He
N20
NH3
NE
NO
O2
SO2
Xe
K-Factor
1.4573
0.6735
0.5082
0.8083
0.5829
0.6100
0.7175
0.8600
0.7382
0.5428
0.6606
0.6026
0.9784
1.0106
1.4540
0.7128
0.7310
1.4600
0.9900
0.9926
0.6900
1.4400
APPENDIX D
Mechanical Drawings
APPENDIX E
Circuit Layout Diagrams
Circuit Layout Top
Circuit Layout Bottom
Mirror
APPENDIX F
Warranty
GFT2 Totalizer Input/Output Flow Monitor/Controller is warranted against parts and workmanship for a period of one year from the date of purchase. It is assumed that equipment selected by the customer is constructed of materials compatible with the environment in which the GFT2 is being used. Proper selection is the responsibility of the customer. It is understood that power supply voltage and external signals should not exceed allowable limits provided in this manual, and it is deemed the responsibility of the customer that only operators with basic knowledge of the equipment and its limitations are permitted to control and operate the equipment covered by this warranty. Anything to the contrary will automatically void Dwyer’s liability and the provisions of this warranty. Defective products will be repaired or replaced at no charge solely at the discretion of Dwyer. Shipping charges are borne by the customer. This warranty is void if the equipment is damaged by accident or misuse, or has been repaired or modified by anyone other than Dwyer or factory authorized service facility. This warranty defines the obligation of Dwyer and no other warranties expressed or implied are recognized.
MAINTENANCE/REPAIR
Upon final installation of the Series GFT2 no routine maintenance is required. The
Series GFT2 is not field serviceable and should be returned if repair is needed.
Field repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes.
CAUTION This product is not intended to be used in life support applications!
©Copyright 2012 Dwyer Instruments, Inc.
Printed in U.S.A. 9/12
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057
FR# RA-444038-00
www.dwyer-inst.com
e-mail: [email protected]
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