Dwyer GFT2 User Manual

Bulletin F-GFT2

9-PIN FEMALE

I/O PORT

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18.8]

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GFT2 F

LOW TOTALIZER

INPUT/OUTPUT

STATUS

Series GFT2 Flow Totalizer

Specifications - Installation and Operating Instructions

he 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.

EATURES

Up to 47 different volumetric and mass flow engineering units (including user-

• defined)

• 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

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 (-)

Analog Input/Output reference

common for pins 4 and 5)

5VDC reference input (for 5 to 10 VDC only)

Table 1

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)

SPECIFICATIONS

nput Analog Range: 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mA.

ccuracy: ±0.1% FS.

perating Temperature: 14 to 158°F (-10 to 70°C).

O Power Supply: 12 to 26 VDC. Weight: 0.3 lbs (125 g)..

“D” Connector

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

he power supply (PS), process variable (PV) input, set point (SP) control output, and

erial communication interface signals are connected to the GFT2 via miniature 9 pin

emale “D” connector.

Power Supply Connections

The power supply requirements for the GFT2 are: 12 to 26 VDC, (unipolar power

upply).

C Power (+) --------------- Pin 4 of the 9 pin “D” connector

C Power (-) --------------- Pin 8 of the 9 pin “D” connector

AUTION

-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 he system.

ower Variable (PV) Input Signal Connections

epending on jumper J2 configuration, input signal can be set to 0 to 5, 0 to 10VDC,

D or 4 to 20 mA.

S-232 Serial Communication Interface Connections

he digital interface operates via RS-232 and provides access to all applicable

nternal configuration parameters and data.

i The settings for the RS-232 communication interface are:

Baud rate: default 9600 baud Stop bit: 1

ata bits: 8

arity: None

low 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-)

(

S-232 TX: Pin 3 on the host PC DB9 connector - Pin 3 of the 9 pin “D” connector

RX-)

(

S-232 Signal GND: Pin 5 on the host PC DB9 connector - Pin 6 of the 9 pin “D”

connector

CAUTION

ated values shown in the specifications in Table 2. Failure to do so might cause

amage to this device. Be sure to check if the wiring and the polarity of the power

hen connecting the external signals to the input terminals,

lways check actual jumper J2 configuration. Do not exceed the

supply and PV signals are correct before turning the power ON. Wiring error may cause damage or faulty operation.

Maximum Rated Values for PV Input Signals

PV Input

Type

0 to 5 VDC

0 to 10 VDC

4 to 20 mA

J2 Jumper Configuration

J2D

10 to 11 11 to 12 10 to 11

J2E

14 to 15 14 to 15 13 to 14

17 to 18 17 to 18 16 to 17

J2F

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.

RS-485 Communication Interface Connection:

he RS-485 converter/adaptor must be configured for: multidrop, 2-wire, half duplex

ode (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(+) pin 7 of the 9 pin “D” connector (TX-)

S-485 T(+) or R(-) pin 3 of the 9 pin “D” connector (RX+)

S-485 GND (if available) pin 6 of the 9 pin “D” connector

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.

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

The 4 to 20 mA current loop output is self-powered (non-

isolated). Do NOT connect an external voltage source to the output signals.

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.

igure 3 - Initial PI Screen (Flow Meter)

djusting the Set Point using local LCD/Keypad: Current Set Point value is

isplayed on the second line of the main PI screen, next to the ‘S’ character. See

igure 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

ove the cursor to another digit position. When desired Set Point value is entered,

se the ENT button to accept the new Set Point value. If in the end of the Set Point

alue entry the ESC button is pressed instead of ENT, the original Set Point value

ill be restored and Set Point adjustment mode will be deactivated. To exit form the

w 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

olatile memory (EEPROM), it will be executed on the next device power up event.

OTE: 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.

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.

igital and Pulse Optically-Isolated Outputs and Connections

FT2 is equipped with two programmable digital optically-isolated outputs. Each

utput can be assigned to any one of many different system events or configured

o 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

onnector: Tyco Electronics P/N 284510-4)

ptocoupler #1 - Terminal J1 (pins 1 and 2):

Plus (+) (passive) Terminal J1 pin 1 Minus (-) (passive) Terminal J1 pin 2

Optocoupler #2 – Terminal J1 (pins 3 and 4):

Plus (+) (passive) Terminal J1 pin 3 Minus (-) (passive) Terminal J1 pin 4

Controlling Set Point value using Program Set Point Mode:

In order to activate the Programmed Set Point:

. Program Set Point mode has to be enabled.

. Program Loop parameter has to be set to desired value (On/Off).

. Program Run parameter has to be set to “On”.

Figure 5

WARNING

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).

Optically-isolated outputs require application of external DC

voltage across terminals. Do not exceed maximum allowed

Figure 6

igure 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

he Program Run status parameter set to “Off”, the program execution will pause

nd 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

uccessive program step will be executed.

enu 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).

ressing the UP or DN button to select the Disabled option and then the ENT

utton to save settings will disable program protection.

f PP password is set to any value more than Zero, the firmware will prompt with

I “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

owered up again.

Figure 9

Parameter Entry

There are two methods of data entry:

. Direct numerical number entry.

. Tabular Input from a table menu.

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.

OTE: During data entry, the input values are checked for acceptability. If data is

ot acceptable, it is rejected and a message indicates that the new data has not

n 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

Once “Change PP Password” menu is selected, the following screen will appear:

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Figure 11

Figure 12

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 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).

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.

gur

ubmenu “User-Defined Units”

n addition to conventional flow units, user-defined flow engineering units may be

elected. Use the “Engineering Units and K-Factor Menu” to navigate to the “User

efined Units” menu option. This option enables user-defined configuration of any

D engineering unit required for process measurement.

The following three parameters are available for this function:

. UD Unit volume K-Factor (defined in Liters)

. UD Unit time base (defined in Seconds)

. 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.

he following selections are available: 1 second, 60 seconds (1 minute), 3600

econds (1 hour), 86400 seconds (1 day). The default entry is 60 seconds. If a

s 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.

low Rate

umber

ngineering

nits

1 2 3 4 5 6 7 8 9

11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

%FS

ml/sec

l/min

ml/hr

ml/day

itr/sec

l litr/min

litr/hr

litr/day

^3/sec

m 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 lgal/sec lgal/min

lgal/hr lgal/day MilL/min

MilL/hr MilL/day

bbl/sec bbl/min

bbl/hr

bbl/day

User

Table 4: Supported Engineering Units List

otalizer

ngineering

nits

m ml ml

itr

l litr litr litr

m m^3 m^3 m^3

f^3 f^3 f^3 f^3 gal gal gal

gal gram gram gram gram

kg kg kg kg

lb lb lb

lb Mton Mton

lgal lgal lgal

lgal MilL MilL MilL

bbl bbl bbl bbl

User

escription

Percent of full scale

Mililiter per second

ililiter per minute

Mililiter per hour

Mililiter per day

iter per second

Liter per minute

Liter per house

Liter per day

ubic 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

ubmenu “K-Factors Settings”

onversion factors relative to Nitrogen are convenient to use when flow

eter/controller mated to GFT2 is calibrated for Nitrogen and another gas is

equired 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.

onversion factors may be applied to all units of measure (except %FS unit) via

CD/Keypad or serial communication interface.

he following three parameters are available for this function:

T 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)

OTE: 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

everal attributes which may be configured by the user via LCD/Keypad or serial

ommunication interface. These attributes control the conditions which cause the

larm to occur and to specify actions to be taken when the flow rate is outside the

a 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

ecome true when the current flow reading is equal to or higher/lower than

orresponding values of high and low flow Alarm levels. If GFT2 is configured as

low controller, flow Alarm conditions become true when difference between Set

f 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.

) Flow Alarm Action Delay (Numerical entry)

he Flow Alarm Action Delay is a time in seconds that the Flow Rate value remain

above the high limit or below the low limit before an alarm condition is validated.

alid 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

utput is assigned to the Flow Alarm Event, in some cases, the Flow Alarm Latch

eature may be desirable.

he following settings are available: Disable or Enable. By default, Flow Alarm is

T non-latching. That means the alarm is indicated only while the monitored Flow Value exceeds the specified set conditions.

ubmenu “Totalizer #1”

FT2 provides the user with two independent Programmable Flow Totalizers. The

otal volume of the flowing fluid is calculated by integrating the actual instantaneous

t 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

ption. The following settings are available for Totalizer #1 (see Figure 10).

) 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.

OTE: Before enabling the Totalizer, ensure that all totalizer settings are

onfigured properly. Totalizer Start values have to be entered in the currently active

c 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).

igure 14

nce the “YES” option is selected, Totalizer #1 will be reset and the following

onfirmation screen will appear:

Figure 15

Submenu “Totalizer #2”

he 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

(

nterruption, the Totalizer #2 volume will be lost (reset to zero). It is preferable to

i 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):

) Totalizer #2 Mode (Tabular entry)

his option determines whether Totalizer #2 is Enabled or Disabled. The following

elections are available: Enabled or Disabled. The default entry is Disabled.

s Totalizer #2 Mode selections can be set with the UP and DN buttons and are accepted by pressing ENT button.

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.

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).

) Totalizer #2 Auto Reload (Tabular entry)

his option allows to automatically reset/reload Totalizer #2 when it reaches preset

ction Volume value (when configured to count UP

o count Down

t 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

uttons and are accepted by pressing the ENT button.

) Totalizer #2 Auto Reset Delay (Numerical entry)

his option may be desirable when “Totalizer #2 Auto Reload” feature is enabled.

T Valid settings are in the range of 0 to 3600 seconds (default value is 0, no delay).

h) Reset Totalizer #2 (Numerical entry)

otalizers #2 reading can be reset by selecting “Reset Totalizer #2” menu option. A

ypical display with Totalizer #2 Reset screen is shown below.

Once “YES” option is selected, the Totalizer #2 will be reset and the following

onfirmation screen will appear.

. This feature may be convenient for batch processing when

)

igure 16

or zero value (when configured

)

he outputs can be made to switch when a specified event occurs (e.g. when a Low

r High Flow Alarm limit is exceeded or when the Totalizer reaches a specified

alue) 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.

•

y 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.

ubmenu “Display Settings”

rocess Information screens can be configured to be static (manual control) or

ynamic (automatic sequencing). In the static mode pressing the UP button allows

d 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.

OTE: PI screens which are masked in the Screen Mask Register (see below) will

e skipped.

Use the “General Settings” menu to navigate to “Display Settings” menu option (see Figure 10).

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).

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

Figure 18

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: 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

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.

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