Ruskin TDFi-RT Service manual

Air Quality Solutions
Technical Bulletin
Model: TDFi-RT
Advanced Thermal Dispersion Fan Inlet
Airflow & Temperature Measuring System
ALL STATED SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE OR OBLIGATION ©Ruskin August 2021TB-TDFi-RT-821/New

Release Date: 6/15/2021Page 2
TDFi-RT Advanced Thermal Dispersion Fan Inlet
Airflow & Temperature Measuring System
Technical Bulletin
TDFi-RT Refer to the Ruskin.com website for the most up-to-date version of this document.
DOCUMENT INTRODUCTION....................................................................................................... 3
START-UP................................................................................................................................... 3
Navigating the Start-Up Menu .........................................................................................................................................3
NORMAL OPERATION ................................................................................................................. 4
BOOT FAN SETUP ....................................................................................................................... 4
NORMAL OPERATION ................................................................................................................. 5
Configuration ...................................................................................................................................................................5
Membrane Push Buttons ..................................................................................................................................................5
Normal Operation Display Mode ......................................................................................................................................6
NAVIGATING THE MENU OPTIONS .............................................................................................. 6
Navigating The Operator Menu.........................................................................................................................................6
Operator Sub-Menu Example ...........................................................................................................................................8
Operator Pin Selection .....................................................................................................................................................9
Flow Configuration .........................................................................................................................................................10
Display Configuration .....................................................................................................................................................12
Analog Output 1 Parameters ..........................................................................................................................................14
Analog Output 2 Parameters ..........................................................................................................................................15
Temperature Output LPF (Low Pass Filter) .....................................................................................................................16
Flow Output LPF (Low Pass Filter) ..................................................................................................................................17
Analog Output Calibration ..............................................................................................................................................18
Temperature Balance Configuration ................................................................................................................................22
Menu Time-Out .............................................................................................................................................................24
BACnet Network Configuration .......................................................................................................................................25
BACnet Flow Alarm Configuration...................................................................................................................................26
BACnet Temperature Alarm Configuration ......................................................................................................................28
NAVIGATING THE SUPERVISOR MENU ...................................................................................... 30
Introduction.....................................................................................................................................................................30
Supervisor Pin Selection ................................................................................................................................................32
Sensor Management ......................................................................................................................................................33
Fan Array Configuration .................................................................................................................................................37
Fan Field Calibration – Manual ........................................................................................................................................40
Fan Field Calibration – Calculated ...................................................................................................................................42
Fan Field Calibration – Automatic Calibration Process ....................................................................................................44
Fan Field Calibration – View Field Calibration Process....................................................................................................45
Fan Field Calibration - Fan Array Calibration Process......................................................................................................45
Fan Array Field Calibration – Calibration Error Screens...................................................................................................47
Factory Default Reset......................................................................................................................................................49
Supervisor Pin Selection ................................................................................................................................................50
TROUBLESHOOTING.................................................................................................................. 51

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DOCUMENT INTRODUCTION
This document describes the TDFi-RT Advanced Thermal Dispersion Fan Inlet Airflow Measuring System’s features and functions. It also
provides guidelines and instructions for setting up and trouble-shooting these devices used in plenum and duct applications.
START-UP
Navigating the Start-Up Menu
After Installation has been verified, apply power to the TDFi-RT Host Monitor. Menu displays will be generated on the Host Monitor’s
front panel (16x2 LCD).
Display will briefly indicate:
The boot splash screen indicates the firmware version and model name.
The number of active/total MONITORS & SENSORS will be represented here
numerically. There is 1 monitor and 2 sensors in this example.
With the progressing from left to right.
After 5 seconds, display will indicate:
After an additional 5 seconds, if the fans have already been configured, display will indicate:
TDFi-RT Advanced Thermal Dispersion Fan Inlet Airflow Measuring System
Technical Bulletin
*NOTE: If fan count is set to 0 (i.e., no fans configured), the Host Monitor will prompt to complete the Boot Fan Setup before warm-up. The
Boot Fan Setup process is outlined on the following pages.

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BOOT FAN SETUP
When the fan count is set to 0 (i.e., no fans have been configured), the Host Monitor will prompt the user to configure the system during
boot immediately before warm-up. This process will step the user through the setup process. Pressing MENU at any point in the setup
will skip the setup process. Pressing ESC will go back a step. To return to automatic Boot Fan Setup if exited early, ensure the number of
fans is set to 0 and cycle power to the system.
1. The user will be prompted to configure the system. Use UP or DOWN keys to select Yes and press ENTER. Pressing ESC here will
cancel the setup process.
2. The user will then be prompted to set the number of fans that this Host box will monitor. Use UP and DOWN keys to select a number
from 1 – 16. Selecting 0 fans will skip the setup and go into warm-up. Press ENTER to confirm selection.
3. The display will then prompt the user to set the number of sensors per fan. This setting applies to all fans. Use Up and Down keys to
select 1 or 2. Press ENTER to confirm selection.
NORMAL OPERATION
The normal operation screen will display the average temperature & average velocity
or volume of the selected fan or the Fan Summary. The Fan Summary will display
the average velocity or the sum of the volumetric flow for all configured fans. The
selected fan address is indicated in the top right of the screen, for example FSUM
is the Fan Summary and F01 is fan 1. Fans 01 through 16 can be viewed after they
are configured. UP and DOWN buttons are used to cycle through the associated fans
with ESC bringing the display back to the fan summary. Prior to setup, with no fans
configured, it will display the average of all connected sensors discovered on initial
boot and display ‘F-‘ in the top right.
Normal Display Mode
Volume (ACFM) selected for display
4. A prompt to enter setup/configuration of the displayed fan will be displayed. Press ENTER to enter the setup/configuration

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5. The user will then select the monitor for the fan being setup. Use UP and DOWN to select the monitor to associate with the fan being
setup, H is the Host, 0-F are the Clients. Press ENTER to confirm selection. When Sensors per Fan is setup as 1,the sensor associated
with the fan being setup must be selected. Use UP and DOWN to select either sensor. Press Enter to confirm selection. When Sensors
per Fan is setup as 2, selecting the sensor # is skipped and both sensors of the selected monitor are assigned to the selected fan.
Terminology:
Monitor - A Monitor can be either a Host box or a Client box.
Host - The monitor box which is the interface of the airflow measuring station to the system’s BAS and includes the 5 membrane
push-buttons on the front panel. The Host address will always be shown as MON H.
Client - The monitor box(es) which do not include the 5 membrane push-buttons on the front panel. Data from each Client monitor
box is drawn by the Host monitor box for processing and transmitting to the BAS. Client monitor boxes have a rotary dial that is used
to set the address displayed as MON 0, MON 1, etc., up to MON F (Hex 15). In systems with less than 16 fans, it is recommended to
set the rotary address in the Client monitor box to match the fan number to which it is connected in order to avoid confusion.
6. Steps 4 through 6 will be repeated for any additional fans that need to be setup.
7. The display will indicate when all fans have been setup.
a. When selecting the assignment, there are 2 errors that can be displayed. If there is an error, it is shown as the last character of
the 2nd line. If both errors are present, it will flash between the 2 characters.
Error 1: ‘*’ is present when the selected assignment is not connected or communicating with the host.
Error 2: ‘!’ is an indication that the displayed assignment has been previously assigned by the user to another fan.
NORMAL OPERATION
Under normal operation, the TDFi-RT Host monitor’s front panel will continuously display average airflow and average temperature in
Imperial or SI units from the fan summary or selected fan.
Configuration
The on-board microprocessor in the TDFi-Rt Host Monitor allows for system configuration, operating parameter selection, analog output
configuration, and display filtering. The Host Monitor also acts as a master across a wired network to other Client Monitor boxes, up to
16, and the remote GUI.
The operator or supervisor can verify configuration and change certain parameters, within defined ranges, by entering the TDFi-Rt
configuration mode. This is accomplished using the five membrane pushbuttons located on the TDFi-Rt Monitor Host front panel display
cover.
Membrane Push Buttons
The five membrane push-buttons on the front panel display (MENU, ESC, UP, DOWN, ENTER) are used to interface with the TDFi-Rt Host
Monitor. Membrane pushbuttons are used during system configuration setup and can be used for certain functions when in the Normal
operation mode.

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Error 1: ‘*’ indicates that a sensor and/or
monitor assigned to a fan is not connected
or responding.
Error 2: ‘#’ indicates that the number of
sensors or monitors has changed since the
last sensor scan.
Error 3: ‘!’ indicates that there are duplicate
sensors assigned to the same fan number.
NAVIGATING THE MENU OPTIONS
Normal Operation Display Mode
The normal operation screens will display the TDFi-Rt system’s average temperature and velocity or volume of the selected fan or the fan
summary. The fan summary will show the average velocity or sum of volume of all configured fans. The selected fan is indicated in the
top right of the screen, for example FSUM is the fan summary and F01 is fan 1. Fans 01 through 16 are available if they are configured.
UP and DOWN buttons are used to cycle through the displayed fans with ESC bringing the display back to the fan summary.
The Normal Operation Display Mode is available upon completion of system warm-up.
…Allowing the user to scroll to each Operator Sub-Menu (See Table 1 below)
2. If the Operator PIN has been enabled, the display will then indicate:
The display will then indicate:
When in Normal Operation Display Mode, the second line can sometimes be too long to display everything at once. This typically occurs
when a ‘custom’ line 2 text is set and a large volume is being displayed. In this event, the display will flash between the read value and
the unit every 3 seconds on line 2 while still displaying the line 2 label.
Note: There are 3 errors that can be displayed. The first placeholder on the first line will display the error character if any are present. If
multiple errors are present, the character will flash between the errors.
NOTE: Network settings are required prior to connecting any building automated control networks.
Navigating The Operator Menu
1. With power ON and Warm-Up complete, press MENU, then UP and DOWN until the arrow “ ” is next to Operator Menu; press
ENTER to activate the menu.

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Enter the 4 digit PIN to access the Operator Menu. Pin entry is made starting at the most significant digit, working to the least
significant digit (left to right); one digit at a time. Scrolling up or down will display 0 to 9.
When the correct number is displayed, then select ENTER to accept the digit. The cursor will automatically move to the next position.
If an error is made after ENTER is pressed, press ESC to go back and change the digit. Upon entering the last digit, the PIN is stored
in non-volatile memory. When enabled, the PIN is required each time the Operator Menu is entered.
*From the Factory, the PIN is 9999 and it is not enabled*
3. Once the Operator PIN is correctly entered or disabled, the display will indicate:
By using the UP and DOWN pushbuttons, the user can scroll through the following selections:
Table 1: Operator Menu Sub-Menus
Once the desired Sub-Menu is displayed with the arrow “ ”, press ENTER to select the corresponding Sub-Menu.
At any time while in the Operator Menu, the user can return to Normal display mode by pressing MENU or scrolling to:
And pressing ENTER. Then scroll DOWN to Exit all Menus and press ENTER.
Note: Write down and retain the PIN in system configuration documentation for future use, to access the TDFi-Rt Operator Menu features.
Operator Menu -
Sub-Menu Selections Sub-Menu Description
Flow Configuration Allows for the configuration of system variable such as: Fan area, elevation, relative humidity,
flow units, and zero cutoff.
Display Configuration Allows the selection of parameters (what and where) to be displayed on LCD lines and display
filtering.
Output 1 Parameters Allows the selection of Analog Output #1 Parameters: Temperature, Flow, or None for Analog
Output #1.
Output 2 Parameters Allows the selection of Analog Output #2 Parameters: Temperature, Flow, or None for Analog
Output #2.
Temperature Low Pass Filter Temperature Low Pass Filter
Flow Low Pass Filter Selects amount of filtering applied to the Analog Output for Flow.
Analog Output Calibration Allows for setting the zero and span of the Analog outputs for AO1 & AO2.
Temperature Balance Menu Allows for the selection of an offset to be applied to the reported average temperature of a
selected fan.
Menu Inactivity Timeout Allows for the selection a time after which the unit will return to Normal operation display mode
and turn off the Front Panel back light, if no activity is detected from the keypad.
BACnet Configuration Turns the BACnet ON / OFF and allows configuration.
BACnet Flow Alarm Configuration Allows selection of the Flow object of the selected fan to turn high and low alarms ON / OFF,
High & Low Set-points, Dead band, and Alarm Delay.
BACnet Temp Alarm Configuration Allows selection of the Temp object of the selected fan to turn high and low alarms ON / OFF,
High & Low Set-points, Dead band, and Alarm Delay.
Enable Operator PIN Allows for the selection of a PIN for accessing the Operator Menu.
Change Operator PIN Allows for changing of the PIN to access the Operator Menu.
Operator Menu Exit Returns display to Normal operation.

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Operator Sub-Menu Example
Arrows with pushbutton designations have been included on the following flow chart of Display Configuration Menu. This will aid in the
navigation of the setup configuration process.
Example of navigation is similar for all Operator Sub-Menu selections.
The remainder of this Section details steps to verify or change TDFi-Rt System Configuration Setup of Operator Sub-Menus.
Selected Menu Sub-Menus Options Select
*Default values shown
Configuration Selections Configuration Options
Display Filter Select between 0 and 9 where 0 is off. Filtering is equal to the value times 10%. Ex. A value of 2
would be 20% filtering. 9 is maximum filtering, 0 is no filtering.
Display Units Select between SI or Imperial units
Display Flow Type Select between Velocity or Volume
Line 2 Parameter
Select between System Flow or Custom Text for the text appearing on line 2 of the display. The
BACnet device name gets updated to display the custom text when this value is set to Custom
Text. BACnet service must be restarted to display changes.
Line 2 Custom Text Select up to sixteen (16) ASCII characters to display on line 2 of the display. Custom text longer
than 7 characters will scroll 1 character at a time. Trailing spaces are ignored.
NOTE: An arrow “ ” symbol will be displayed on the left side of the currently selected menu, sub-menu, or option. Scrolling ability for data
entry will have a “ ” symbol displayed on the line 2 of the display. Certain values are edited a single digit or character at a time. The currently
selected digit or character for those values will blink.

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Operator Pin Selection
Allows the configuration of an Operator PIN. PIN options are at the bottom of the Operator Menu.
Example below depicts the Operator Menu selected when the Operator PIN is enabled:
Use UP or DOWN to change PIN one digit at a time. The cursor position originates at the left, most significant, and working right, least
significant with 0 to 9 digit representation during the UP or DOWN scroll. Press ENTER to then select the 0 to 9 entry and moves to the
next digit. ESC pressed will cause the cursor to back up one digit per press. Once desired PIN is displayed, press ENTER on the last digit.
New PIN will be stored in memory and display will return to previous menu.
Caution: If PIN is enabled or changed, write it down and retain in system configuration records in the case it is forgotten.
1. To return to Main Menu, scroll and select Exit Operator Menu, press ENTER. Alternatively, pressing ESC from the Operator Menu will
exit out to the Main Menu.
2. To return to Normal display mode, press MENU.
Selected Menu Options Select
*Default values shown
Note: The Operator Menu can be only accessed with a PIN, when enabled.
Note: From the Factory, PIN is 9999 and is not enabled.
Note: If user desires not to change PIN, press ESC. The controller will remain programmed as it was originally.

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Flow Configuration
The Operator Menu selection is where all application specific data is entered to configure the TDFi-Rt Host Monitor for a unique
application. Typical data includes: Units of Measure, Fan Diameters, Flow Units, Site Elevation, System Ranges, and Zero Cutoff.
Selected Menu Sub-Menus Options Select
*Default values shown

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1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER to enter Flow Configuration Menu. Display will indicate:
3. Press ENTER and display will prompt the user to confirm that a new calibration is required if diameter is modified. Use Up and DOWN
to select the fan or fan array. Press ENTER to select the fan or fan array to view and edit its diameter. Selecting Fan Array will set
the same diameter for all fans. When viewing the calculated area, use UP or DOWN to select between ‘Confirm’ and ‘Edit’ and press
ENTER to select. Selecting ‘Confirm’ will accept the entered diameter and calculated area. Selecting ‘Edit’ will allow manual entry for
the area and will change the diameter to match the entered area.
4. Use UP or DOWN to change setting. Once desired setting is displayed, press ENTER. New setting will be stored in memory and display
will progress through the required values for the shape selected and save each value as they are confirmed. With all required values
entered the display will return to the Flow Configuration Menu shown in Step #2.
5. Use UP or DOWN to select remaining parameters to be changed within the Flow Configuration Menu. Press ENTER to change the
selected setting.
Note: See Tables 2 and 3 for the list of available selections for the appropriate Flow Type.
Configuration Selections Configuration Options
Fan Diameter
Select the fan or fan array and enter the fan area.10 to 48 in or 25.4 to 60.96 cm. Selecting ‘Fan
Array’ will configure the diameter to be the same for all fans. If a specific area is needed, selecting
‘Edit’ will allow manual area entry
Site Elevation Enter the site elevation from 0 to 15,000 feet or 0 to 4572 meters.
Relative Humidity Enter the relative humidity from 0 to 100%, 1% at a time.
Flow Units Enter the flow units. Refer to Table 1 for available Units.
Output Lockout Enter the output lockout from 0 to 750 FPM or 0 to 3.81 MPS. When the measured velocity of a
fan is less than this amount, the output will remain zero.
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.

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Actual Flow Units SI Units Imperial Units
Actual/Sec ALPS ACFS
Actual/Min ALPM ACFM
Actual/Hour ACMH ACFH
Volumetric units of measurement Display
Actual cubic feet per second ACFS
Actual cubic feet per minute ACFM
Actual cubic feet per hour ACFH
Actual liters per second ALPS
Actual liters per minute ALPM
Actual cubic meters per hour ACMH
Volumetric units of measurement Display
Standard cubic feet per second ACFS
Standard cubic feet per minute SCFM
Standard cubic feet per hour SCFH
Standard liters per second SLPS
Standard liters per minute SLPM
Standard cubic meters per hour SCMH
Standard Flow Units SI Units Imperial Units
Standard/Sec SLPS SCFS
Standard/Min SLPM SCFM
Standard/Hour SCMH SCFH
Table 2: Volumetric Units of Measurement from Flow Unit selection and Display Units
Table 3: Volumetric Units of Measurement
6. To return to the Operator Menu, scroll to Exit this Menu in the Flow Configuration Menu and press ENTER. Alternatively, pressing ESC
will also return to the Operator Menu. Pressing MENU pushbutton will return to the Normal display mode.
Display Configuration
Allows selection of display units, parameters, Line 2 customizing, and the level of display filtering, 0 to 9 (0 is off, 9 is 90%).
Selected Menu Sub-Menus Options Select
*Default values shown

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Display Configuration
Sub-Menu Selections Configuration Options
Display Filter Select between 0 and 9 where 0 is off. Filtering is equal to the value times 10%. Ex. A value of 2
would be 20% filtering. 9 is maximum filtering, 0 is no filtering.
Display Units Select between SI or Imperial units
Display Flow Type Select between Velocity or Volume
Line 2 Parameter
Select between System Flow or Custom Text for the text appearing on line 2 of the display. The
BACnet device name gets updated to display the custom text when this value is set to Custom
Text. BACnet service must be restarted to display changes
Line 2 Custom Text Select up to sixteen (16) ASCII characters to display on line 2 of the display. Custom text longer
than 7 characters will scroll 1 character at a time. Trailing spaces are ignored.
Table 4: Display Configuration Sub-Menu Selections and Configuration Options
1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER to enter Display Configuration Menu. Display will indicate:
3. Press ENTER and the display will indicate current setting of the filter 0 to 9 (0 is off, 4 is 40%).
4. Use UP or DOWN to change setting. Once desired setting is displayed, press ENTER, new setting will be stored in memory and the
display will return to Display Configuration Menu as in Step #2.
5. Use DOWN scroll to indicate:
6. Press ENTER and display will indicate current parameter selected to display on Line 2 [Velocity or Volume (determined by Flow Type
setting) or Custom Text].
7. Use UP or DOWN to scroll to desired parameter. Press ENTER and parameter will be stored in memory and the display will indicate
as in Step #5.
8. Scroll through the remaining Display Configuration Menu settings and make the appropriate system setup changes.
9. If Custom Text was selected and ENTER pressed in Step #7, scroll to Line 2 Custom and press ENTER.
10. Use UP or DOWN to scroll through available characters set (see ASCII chart, Table 5, at the end of this Section for available characters).
11. When desired character is displayed, press ENTER. Character will be stored and cursor will advance one position to the right, ESC
allows the Operator to back-up one character position.
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.

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1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER and display will indicate current setting of Analog Output #1 (Flow, Temperature or None).
12. Repeat Steps 10 and 11 for the remaining character positions. When position 16 is entered, user will be exited back to display as in
Step 13 and Custom Text will be stored in memory.
13. Scroll to Exit this Menu and press ENTER to back out to the Operator Menu, otherwise, press MENU to return to the Normal display
mode. Alternatively, pressing ESC will also return to the Operator Menu.
Table 5: LCD Character Chart
Analog Output 1 Parameters
Allows the selection for which the process variables Output #1 represent. Process variables available for output are: Flow, Temperature,
or None. If Flow is selected, output will represent the user’s defined flow Design Range. If Temperature is selected, output span will be
the user’s temperature Design Range. The Fan Summary values controls the analog output.
Selected Menu Options Select
*Default values shown
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.

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3. Use UP or DOWN to change setting. Once desired setting is displayed (Flow, Temperature or None), press ENTER. New setting will be
stored in memory and display will return as in Step #1.
3. Use UP or DOWN to change setting. Once desired setting is displayed (Flow, Temperature or None), press ENTER. New setting will be
stored in memory and display will return as in Step #1.
1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER and display will indicate current setting of Analog Output #2 (Flow, Temperature or None).
Analog Output 2 Parameters
Allows the selection for which the process variables Output #2 represent. Process variables available for output are: Flow, Temperature,
or None. If Flow is selected, output will represent the user’s defined flow Design Range. If Temperature is selected, output span will be
the user’s temperature Design Range. The Fan Summary values controls the analog output.
Selected Menu Options Select
*Default values shown
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.

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3. Use UP or DOWN to change setting. Once desired setting is displayed, press ENTER. New setting will be stored in memory and display
will return as in Step #1.
1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER and display will indicate current setting of Process filter (0 (off) to 9 (maximum); 9 = 90%).
This filtering affects reported temperature values and analog channels configured for temperature
Temperature Output LPF (Low Pass Filter)
Allows selection of level of Process filtering applied to Temperature outputs. Levels are 0 to 9, with 0 representing the filter off and 9 for
maximum filtering (Each unit of filtering is equal to 10% filtering, e.g., 2 is equal to 20%).
Selected Menu Options Select
*Default values shown
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.
Note: Display Filter is an additional filter selection applied only to the display.

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3. Use UP or DOWN to change setting. Once desired setting is displayed, press ENTER. New setting will be stored in memory and display
will return as in Step #1.
1. While in Operator Menu, use UP or DOWN to scroll to:
2. Press ENTER and display will indicate current setting of Process filter (0 (off) to 9 (maximum); 9 = 90%).
This filtering affects reported flow values and analog channels configured for flow.
Flow Output LPF (Low Pass Filter)
Allows selection of level of Process filtering applied to Flow outputs. Levels are 0 to 9, with 0 representing the filter off and 9 for maximum
filtering (Each unit of filtering is equal to 10% filtering, ex. 2 is equal to 20%).
Selected Menu Options Select
*Default values shown
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.
Note: Display Filter is an additional filter selection applied only to the display.

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Analog Output Calibration
Allows for the calibration adjustments of the TDFi-Rt Host Monitor Analog Outputs 1 & 2.
Selected Menu Sub-Menus Options Select
*Default values shown

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4. Press ENTER. Display will indicate:
1. Set Analog Output #1’s parameter to None to keep the output from changing with flow or temperature.
2. While in Operator Menu, use UP or DOWN to scroll to:
3. Press ENTER to enter Output Calibration Menu. Display will indicate:
This section can be accomplished with the TDFi-Rt Host Monitor mounted in its operating location or at a test bench in a calibration lab.
Note: Press ESC at any time to return to the previous menu and exit without changing any settings.
Configuration Selections Configuration Options
Output 1 mA Offset Set the mA Offset for Output 1 from -2 mA to +2 mA.
Output 1 mA Low Span Select the Low Span of Output 1 from 1 to 4 mA. Must be lower than the High Span.
Output 1 mA High Span Select the High Span of Output 1 from 1 to 20 mA. Must be higher than the Low Span.
Output 2 mA Offset Set the mA Offset for Output 2 from -2 mA to +2 mA.
Output 2 mA Low Span Select the Low Span of Output 2 from 1 to 4 mA. Must be lower than the High Span.
Output 2 mA High Span Select the High Span of Output 2 from 1 to 20 mA. Must be higher than the Low Span.
Design Range Low Set the Design Range Low for outputs configured for Flow from 0 to 10,000 FPM (or equivalent
volumetric flow). Must be lower than Design Range High.
Design Range High Set the Design Range High for outputs configured for Flow from 0 to 10,000 FPM (or equivalent
volumetric flow). Must be higher than Design Range Low.
Temperature Range Low Set the Temperature Range Low for outputs configured for Temperature from -29.2 to +129.2
°F. Must be lower than Temperature Range High.
Temperature Range High Set the Temperature Range High for outputs configured for Temperature from -29.2 to +129.2
°F. Must be higher than Temperature Range Low.
Output 1 Test Allows the user to test Output 1 with the Offset and Span settings at 0, 50, and 100% output.
Output 2 Test Allows the user to test Output 2 with the Offset and Span settings at 0, 50, and 100% output.

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11. Press ENTER. Display will indicate:
9. Press ENTER. Display will indicate:
10. Set the low span using Up and Down to scroll between 1-4 mA. The Low span must be lower than the high span. Once the low span
set, press ENTER and then scroll and the display to indicate:
12. Set the high span using Up and Down to scroll between 1-20 mA. The high span must be higher than the low span. Once the high
span is set, press ENTER to confirm the setting.
13. Analog Output #1’s parameter can now be set back to its previous value before the calibration process.
14. Repeat Steps 1 through 8 for TDFi-Rt Monitor Host Analog Output #2, connect DMM across terminals 3 and 4.
Note: Output is 1-20mA, a load resistance should be in series with the DMM. This can be accomplished by connecting the actual process load
or a resistor of similar value to the actual process load (250 Ω min).
Warning: Failure to put resistance in series with output will trip internal solid state fuse protection.
6. DMM should be reading a minimum value: 4.00 ± 0.01mA, as determined in the Output 1 Span.
7. If DMM is reading out of tolerance, use UP or DOWN to adjust the TDFi-Rt Host Monitor output for an acceptable DMM reading.
Single digit data entry, left to right, to change the Output 1 Offset. Once ENTER is pressed on the last digit, the DMM will reflect the
adjusted Output 1 Offset.
8. Once an acceptable zero reading is obtained, scroll UP or DOWN and display will indicate:
5. Connect a DMM set for the scaling of the Analog Output #1 across terminals 1 and 2 on the TDFi-Rt Host Monitor.
HOST MONITOR
Note: Output is 1-20mA, a load resistance should be in series with the DMM. This can be accomplished by connecting the actual process load
or a resistor of similar value to the actual process load (250 Ω min).