Fluid Components International MT91 Operation

CHAPTER 3 - OPERATION FLUID COMPONENTS INTL

3. Operation

Caution:

Introduction

The flowmeter has been configured and calibrated to customer specifications. Each flowmeter contains distinct
operating limits and units of measurement. This chapter will show how to determine and manipulate the
configuration of the flowmeter.

Start Up

Verify the wiring before applying power. Also verify the correct power connections have been made to the flow
transmitter.

1. Apply Power.

2. Wait 5 minutes for the unit to warm-up and stabilize.

3. The flowmeter evaluates sensing points as out-of-range until they have warmed up to operating temperature.

The flow transmitter contains electrostatic discharge (ESD) sensitive devices. Use standard ESD
precautions when handling the flow transmitter. See Chapter 2, Installation for ESD details.

The flowmeter displays a system status message of "Check Heads" until all sensing points are functioning
within their calibrated range. This status message should change to the normal display of "System OK" within
the 5 minute warm-up period. The output signal displayed should be representative of the estimated or
calculated current process media flow.

4. The unit automatically enters the flow metering mode and the display sets to normal operation.
The flowmeter outputs should now indicate the mass flow rate in the desired units of measure.
In the event that the display or the "System OK" message does not appear, or the values are out-of-range or

obviously incorrect, then turn the power off and proceed to Chapter 5 - Troubleshooting.

Using the MT91 Software with Display

Display

The flowmeter contains a 4 x 20 character LCD display. Flow rate, temperature, and system status are all accessible
through the display.

Menu Window

Four components make up the menu window. They are the menu level, title, selections, and prompt line. These
components are illustrated in Figure 3-1. The top line displays a menu level and title. Lines two and three are used
to scroll through available options. The prompt line indicates which menu commands are appropriate.

2.1.1 FLOW

1=Velocity
2=Volume

Menu Code

N=MORE UP HOME

Title

Available Selections

Prompt Line

C00219-1

Figure 3-1. The Menu Window

Doc. No. 003185 Rev. B 3 - 1

Model MT91 Multipoint Flowmeter

FLUID COMPONENTS INTL CHAPTER 3 - OPERATION

The menu level is a numeric reference which identifies each window of the menu structure. The menu level in
Figure 3-1 indicates that the user is three levels deep (Level 2, sublevel 1, sub-sub-level 1). This example code can
be associated functionally as 2(SETUP).1(DISPLAY).1(FLOW). Occasionally, the depth of the menu makes
displaying the complete menu level impractical. When this happens, the special character “>” indicates that the
menu level may be deeper than the code indicates (e.g. “2.2.3.1>RLY[1] MODE” ).

The title gives the user a better idea of where the system is within the menu structure. Some titles are informative
enough to completely describe the menu function, while other titles are ambiguous unless the parent menus are
known.

Other Window Types

Another common window encountered is a non-scrolling menu. The window is similar to the menu window except
that does not scroll and all choices are contained within the window. The current selection (if there is one) is also
contained in the parenthesis to the left of the question mark.

Menu Control

The prompt line and available selections display key strokes for that menu level. If a key is pressed that is not valid
for that menu, the screen will stay the same. The key pad layout is shown in Figure 3-2.

0-9 Enter numbers
Y Yes to prompts

1 2 3 Y N

4 5 6

7 8 9 P

ENTR

0 #

_

HOME

.

UP

C00220-1

N No to prompts; more display

- minus sign
. decimal point

←

P no special use
ENTR accepts current value
HOME return to main menu
UP backup one menu level

backspace

Figure 3-2. Keypad Layout

Table 3-1. Key Functions

See Table 3-1 for key pad assignments. At any time, press the HOME key to display the main menu.
HOME can be used to escape from calibration routines, restart a progression into the menu structure, or
quickly change from one area of the menu to another.

When N=MORE is displayed on the prompt line, more than two menu selections are available. Press N to
scroll through all the selections.

When UP is displayed on the prompt line, the UP key can be used to back out of menus. The menu moves
back one level each time the UP key is pressed.

To make a selection, press the numeric key associated with the desired menu selection. The selection does
not have to be displayed, but it must be one of the available selections.

Every path through the menu will eventually cause control to pass from the menu structure to a routine that
performs a task such as change a parameter value, initiate a test, or calibrate the system hardware. Some of
these routines still provide selections that emulate the menu structure. When the system is operating outside
the menu structure, there are subtle differences in the user interface. For example, the UP key may have no
affect or the prompt line won't appear.

Menu Organization

The top level of the menu is shown in Figure 3-3. The menu structure is divided into four major groups, a
display function, and the revision display.

Model MT91 Multipoint Flowmeter

3 - 2 Doc. No. 003185 Rev. B

CHAPTER 3 - OPERATION FLUID COMPONENTS INTL

• The first menu option places the units display into the normal display mode. When the system is in this mode,

flow and/or temperature measurements are displayed. While in the normal display mode, pressing any key will
cause the main menu to display.

• The Setup group presents the options for customizing the system inputs and outputs. Most of the settings will

be made through menus in this group.

• The diagnostics group provides displays that help isolate problems and test the system integrity.

• The calibration group is used primarily by factory technicians, but there are displays that can be helpful to the

customer.

• The verify group provides a means to view the values of important system parameters.

• Finally, the firmware version is available for display.

0.0 MAIN MENU
1=Normal Display
2=Setup
3=Diagnostics
4=Calibration
5=Verify
6=Version
7=Time Delay

Normal Display

CH1: 47.8 SF/S
CH2: 89.2 F
K1 K2

System OK

2.0 SETUP
1=Display
2=Outputs
3=Communications
4=Configuration
5=Password
6=Clock

3.0 DIAGNOSTICS
1=System Status
2=Output Tests
3=Calibration Tests
4=Schedule Tests

4.0 CALIBRATION
1=Cal Initialize
2=Cal Inputs
3=Cal Outputs
4=Cal Flow

5.0 VERIFY
1=Verify Setup
2=Verify Cal

Version x.xx

Release Date

dd-mm-yy

2.1 DISPLAY
1=Flow
2=Temperature
3=Screen Setup

2.2 OUTPUTS
1=Assign Heads
2=Analog
3=Relays
4=Filter
5=Corrections

2.3 COMMUNICATIONS
1=Mode
2=Baud
3=Protocal
4=RS-485 Address

2.4 CONFIGURATION
1=Setup User Config
2=Setup Factory Cfg
3=Save Config

2.5 PASSWORD
1=Change User PW
2=Enable PW

2.6 SET CLOCK
1=Set Clock
2=Auto Offset

5.1 VERIFY SETUP
1=Flow
2=Temp
3=Outputs
4=Communication

5.2 VERIFY CAL
1=Inputs
2=Outputs
3=Flow

3.1 SYSTEM STATUS
1=Sensors
2=Heaters

3.2 OUTPUT TESTS
1=Analog Output Test
2=Relay Test

3.3 CALIBRATION
TESTS

1=Start Test
2=Display Results

3.4 SCHEDULE TESTS
1=Calibration Drift
2=Enable Auto Test

4.1 CAL INITIALIZE
1=All Cal Parms
2=Input Cal Parms
3=Output Cal Parms
4=Flow Cal Parms
5=Misc Cal Parms

4.2 CAL INPUTS
1=Sensor Type
2=Excitation
3=Heaters
4=Normalize to R
5=Unipolar rR & dR
6=Bipolar rR & dR
7=Display dV &dV

4.3 CAL OUTPUTS

1=Analog Outputs

7.0 TIME DELAY
Enter Minutes:
(1)
?

7.0 TIME DELAY
Output Frozen

Press any key to stop

Time Left: 0:07

Figure 3-3 Menu Flowchart

Doc. No. 003185 Rev. B 3 - 3

4.4 CAL FLOW
1=Coefficients
2=Limits
3=Temp Comp
4=Offset

C00221-1.vsd

Model MT91 Multipoint Flowmeter

FLUID COMPONENTS INTL CHAPTER 3 - OPERATION

Quick Custom Setup

In order to use the quick operation procedure, an assumption has been made that the password is enabled (this is the
factory preset condition).

If mistakes in data entry are made, press the back arrow key to correct mistake.
Menu level refers to the sequence of key to press to reach a particular function from the MAIN MENU. For

example, to go to menu level 2.2.1, press HOME, 2, 2, and 1.
Y/N refers to Y Save Permanently or Change Parameter or N Do Not Save Permanently or Do Not Change

Parameter.

Using Main Functions

MAIN MENU Press HOME.

Returns user to MAIN MENU. In some cases, it may be necessary to press
HOME more than once.

NORMAL DISPLAY menu level 1.

To view the NORMAL DISPLAY

DelR and RefR menu level 4.2.5

To view a sensing point's raw signal DelR and RefR. When prompted, enter
the number of the sensing point to be viewed.

PASSWORD menu level 2.5.1.2

Enable or Disable the PASSWORD

PASSWORD menu level 2.5.1.1

Change the user PASSWORD. If the password protection is enabled, the
user must enter the current password.

Selecting Units of Measurement

After reaching the menu level, select the combination of units that will produce the desired end result.
Velocity units menu level 2.1.1.1

Length 1=FT, 2=M and
Time 1=Sec, 2=Min, 3=Hrs, 4=Day

Volume units menu level 2.1.1.2

Volume 1=SCF, 2=NCM, 3=NLP
Area 1=Square Feet, 2=Square Meters
Area Value enter the area of the duct
Time 1=Sec, 2=Min, 3=Hrs, 4=Day

Mass units menu level 2.1.1.3

Mass 1=LBM, 2=KG, 3=TON, 4=TONNE
Area 1=Square Feet, 2=Square Meters
Area Value enter the area of the duct
Time 1=Sec, 2=Min, 3=Hrs, 4=Day

Temperature units menu level 2.1.2

Model MT91 Multipoint Flowmeter

1=°F 2=°C 3=K 4=°R

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CHAPTER 3 - OPERATION FLUID COMPONENTS INTL

Setting Up Analog Outputs

Sensing Point Outputs menu level 2.2.1

Channel 1=Chan 1 2=Chan 2

After selecting a channel, the menu automatically provides new
selections to assign sensing points.

Sensing Points 1=Add All Heads 2=Add Head 3=Del All Heads
4=Del Head 5=View Assigned 6=Save

An "X" will mark on the display to show which sensing points are assigned
to the selected channel. To keep changes, user must save assignments.

Output Parameters menu level 2.2.2

Channel 1=Chan 1 2=Chan 2

After selecting a channel, the menu automatically provides new
selections to set output parameters.

Output Signal* 1=0-5V 2=0-10V 3=4-20mA
Mode 1=Flow 2=Temp
Full Scale enter a value
Port Zero enter a value

*Set Jumpers to match. See Chapter 2.

Setting Up Relays

Relays 1 and 2 can be set as switch points or test/status parameters. If relays 1 or 2 are used for switch
points, their mode must correspond to their respective analog output channels. (e.g. If relay 1 is set to
be a flow switch point, then analog output channel 1 must be in the flow mode.) If relays 1 or 2 are set
to flow or temperature modes, the user MUST set switch point and hysteresis parameters. If this is not
done, a chattering noise will be heard. Relay 3 and 4 can only be set as test/status parameters.

Relay Mode menu level 2.2.3.1

Relay 1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4

After selecting a relay, the menu automatically provides new
parameters to set the mode.

1=View Mode 2=Flow 3=Temperature
4=System Status 5=Zero Test 6= Span Test.

Switch Points menu level 2.2.3.2

Relay 1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4

After selecting a relay, the menu automatically provides new
parameters to set the switch point.

1=View Sw. Pt. 2=Above 3=Below
4=Inside 5=Outside

Hysteresis menu level 2.2.3.3

Relay 1=Rly #1 2=Rly #2 3=Rly #3 4=Rly #4

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Model MT91 Multipoint Flowmeter

FLUID COMPONENTS INTL CHAPTER 3 - OPERATION

In-Depth Custom Setup Procedure

When a flowmeter leaves the factory, it is configured to the application information know at the time of order. At
installation time; however, changes to the factory settings may be necessary. There are several parameters that can
be modified to customize the system. This section describes how to customize the flowmeter.

Menu level refers to the sequence of key to press to reach a particular function from the MAIN MENU. For
example, to go to menu level 2.2.1, press HOME, 2, 2, and 1.

Each time a system parameter is changed, the display will prompt the user to save the change. For the change to
endure through power off periods or a system reset, press Y. For a temporary change, press N. When changes are
not saved, the user can restore the previous settings by cycling the input power or pressing any key for more than 10
seconds to reset the system.

In most cases, the existing value of the parameter that is changing will be displayed. If no change is required, press
ENTR, select it again, or press HOME.

Since the flowmeter has multiple inputs and outputs, some parameters are stored in groups. For example, the analog
output parameters apply to both channels one and two. The menu level to change the analog output parameters will
prompt the user to select a channel. After making changes to that channel, back out of and re-enter the menu level to
make changes to the other channels. Use either the UP key or the HOME key to back out of the menu level.

Password Protection

Before customizing the flowmeter configuration, the customer must have access to the system parameters. Two
levels of password protection affect access to these parameters.

Factory Level

The highest level of protection requires a factory password for access. This password prevents inadvertent changes
to variables associated with the system calibration, sensing point type, and other parameters that require factory
resources to properly set.

User Level

The second level of protection requires a user password for access. This password provides the customer with the
ability to limit access to parameters that affect the way the system operates.

Both levels of password protection can be enabled or disabled. When the system leaves the factory, the factory level
protection will be enabled and the user level will be left disabled. No password is required to enable a level of
protection, but the appropriate password is required to disable protection.

Note:

The user password is set to “123” when the system is shipped.

Ø To edit the user password

1. Go to menu level 2.5.1 (SetupÞ PasswordÞ Change User PW).

2. If current user password if it is enabled, enter the current password, then press ENTR.

3. Enter desired password, then press ENTR.

Ø To enable and disable user password protection

1. Go to menu level 2.5.2 (SetupÞ PasswordÞ Enable PW).

2. If user password is already enabled, enter password. Select 2=Disable to disable password.

3. If user password is not enabled, select 1=Enable to enable the password.

Model MT91 Multipoint Flowmeter

3 - 6 Doc. No. 003185 Rev. B