Table of Contents
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AD-1272 Advanced Thermal Dispersion Probe Airflow
Measuring System
Technical Bulletin
AD-1272
Document Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Navigating the Start-Up Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Membrane Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Navigating the Menu Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Navigating the Operator Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Enable, Disable, and Change the Operator PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Flow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Display Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Updating Display Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Selecting Custom Text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Analog Output 1 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Updating Analog Output 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Analog Output 2 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Updating Analog Output 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Temperature Output LPF (Low Pass Filter). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Updating Temperature Output LPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Flow Output LPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Updating Low Output LPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Analog Output Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Configuring the Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Temperature Balance Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
K-Factor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Configuring the K-Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System
Refer to the
QuickLIT website
Technical Bulletin
1
Code No. LIT-12012477
Issued December 2017
for the most up-to-date version of this document.
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Related Manuals for Johnson Controls AD-1272
Summary of Contents for Johnson Controls AD-1272
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Page 1: Table Of Contents
Configuring the K-Factor ............25 AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System... - Page 2 Troubleshooting ............47 AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 3: Document Introduction
Navigating the Start-Up Menu After installing the AD-1272 Airflow Measuring System, power on the unit. Menu options appear on the front panel LCD display of the primary transmitter and are replicated on the Remote Display (see Figure 1). The LCD display has a 16-character per line, 2-line display. -
Page 4: Normal Operation
Figure 3: Active Probes and Sensors Screen When the Primary Transmitter with Display is located remotely, the AD-1272 count the Primary Transmitter Note: as an additional probe. This will cause the number of probes to be shown as one greater than the number of ancillary probes. -
Page 5: Configuration
Configuration The onboard microprocessor in the AD-1272 primary transmitter allows for system configuration, operating parameter selection, analog output configuration, and display filtering. Each primary and ancillary probe automatically reports temperature and flow based on the number of Note: installed sensors (1 through 8) per probe. -
Page 6: Navigating The Operator Menu
Allows user to select a PIN to access the Operator Menu and prevents unauthorized access Enable Operator PIN of the Operator Menu. (Enable Oper PIN) Allows user to change the Operator Menu PIN. Change Operator PIN (Change Oper PIN) AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 7 Configures high and low setpoints, deadband, and alarm delay settings and turns the BACnet BACnet Temperature temperature high and low alarms on and off. Alarm Configuration (Temp Alarm Cfg) Returns the display to normal operation. Exit Operator Menu (Exit Oper Menu) AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 8: Enable, Disable, And Change The Operator Pin
Alternatively, press ESC to return to the Operator Menu without updating the PIN. If the PIN settings are enabled, the PIN number must be entered each time the Operator Menu is entered. Note: AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 9: Flow Configuration
1. Duct Area controls area input when the Other duct shape is selected. 2. Range is set in Feet per Minute (FPM), but should be converted to Cubic Feet Per Minute (CFM) to correspond to the output. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 10 Volumetric Units of Measurement Display ACFS Actual Cubic Feet Per Second ACFM Actual Cubic Feet Per Minute ACFH Actual Cubic Feet Per Hour ALPS Actual Liters Per Second ALPM Actual Liters Per Minute AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 11 The standard conditions for Standard Cubic Feet Per Minute airflow measurements are as follows: 14.696 pounds per square inch (psi) equals 101.325 kPa at sea level. 70 degrees Fahrenheit equals 21.1 degrees Celsius. 50% relative humidity (RH). AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 12: Display Configuration
Select between System Flow and Custom Text for text appearing in line 2 of the display. Line 2 Parameters Select up to seven ASCII characters to display in line 2 of the display. See Selecting Custom Text for Line 2 Custom more information. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 13: Updating Display Configuration
3. Scroll through the submenu options and make any necessary updates. See Table 5 for a description of the Display Configuration submenu selection options and their configurable options. Selecting Custom Text 1. Scroll to the Line 2 Custom submenu and press ENTER. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 14: Analog Output 1 Parameters
Available process variables include flow, temperature, and none. If flow is selected, the output represents the defined flow design range. Default flow is in FPM. See BACnet Network Configuration for CFM configuration. Note: AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 15: Updating Analog Output 1
2. Press ENTER. 3. Make any necessary updates to the submenu selection. See Table 6 for a description of the Analog Output 1 submenu selection option and its configurable option. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 16: Analog Output 2 Parameters
2. Press ENTER. 3. Make any necessary updates to the submenu selection. See Table 7 for a description of the Analog Output 2 submenu selection option and its configurable option. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 17: Temperature Output Lpf (Low Pass Filter)
2. Press ENTER. 3. Make any necessary updates to the submenu selection. See Table 8 for a description of the Temperature Output LPF submenu selection option and its configurable option. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 18: Flow Output Lpf
2. Press ENTER. 3. Make any necessary updates to the submenu selection option. See Table 9 for a description of the Flow Output LPF submenu selection option and its configurable option. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 19: Analog Output Calibration
Design Range ENTER DOWN Design Range ENTER High DOWN ENTER Temperature Range Low DOWN Temperature ENTER Range High DOWN Temp Range Hi Exit this Menu Exit this Menu DOWN ENTER AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 20: Configuring The Analog Output
Temperature Range Low Select between -34.6 to 129.2°F (-37 to 54°C) for maximum range of output temperature Temperature Range High spanning. By default, the AD-1272 Airflow Measuring System is factory calibrated. Note: Configuring the Analog Output To configure the analog output: 1. - Page 21 5. Connect a digital multi-meter set to scale Analog Output 1 across terminals plus and minus on the AD-1272 Airflow Measuring System. See Figure 29 for terminal locations. Figure 29: AD-1272 Airflow Measuring System—Terminals 1 and 2 The output value should be between 1 and 20 mA. To align the load resistance with the digital multi-meter,...
- Page 22 Figure 34: Output Calibration Menu Selection 17. Scroll through the submenu options and make any necessary updates. See Table 10 for a description of the Analog Output Calibration submenu selection options and their configurable options. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 23: Temperature Balance Configuration
2. Press ENTER. 3. Scroll through the submenu options and make any necessary updates. See Table 11 for a description of the Temperature Balance Configuration submenu selection options and their configurable options. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 24: K-Factor Configuration
Exit this Menu Returns to Only when # of Data Points is set to 2 or higher. Operator Menu Only when # of Data Points is set to 3. DOWN AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 25: Configuring The K-Factor
1. In the Operator Menu, press UP or DOWN to scroll to the K-Factor Configuration submenu. Figure 38: K-Factor Configuration Selection Screen 2. Press ENTER to view the K-Factor Configuration submenu. Scroll to the K-Factor Enable? submenu selection. Figure 39: K-Factor Enable Selection Screen AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 26 2. Press ENTER to adjust the manual K-Factor gain. Press UP or DOWN to modify the currently selected value. Figure 43: K-Factor Gain Screen 3. Press ENTER to confirm the value and return to the K-Factor Configuration submenu. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 27 2. Press ENTER. Press UP or DOWN to select the number of points to use in the K-Factor calculation. Figure 47: Number Data Points Adjustment Screen 3. Press ENTER to confirm the value and return to the K-Factor Configuration submenu. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 28 Point 2 must be higher than point 1 and point 3 must be higher than point 2. When all points are recorded, continue to Step 10. 10. Press UP or DOWN to scroll to the Generate K-Factor submenu selection. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 29 When two data points are selected, the display indicates the K-Factor Generated, Calculated Offset 1, and Calculated Gain 1 screens. When three data points are selected, all five screens display. Figure 53: K-Factor Equation Value Generator Screens AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 30: Menu Timeout
Figure 56: Menu Timeout Selection Screen 2. Press ENTER. 3. Make any necessary updates to the submenu selection. See Table 13 for a description of the Menu Timeout submenu selection option and its configurable option. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 31: Bacnet Network Configuration
Select a value between 1 and 127. Holding down the button increases the rate the value updates. BACnet Max Mast Select the 9,600, 19,200, 38,400 (default), or 76,800 baud rate. BACnet Baud Rate AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 32: Bacnet Objects
Hardware Objects If the Analog Outputs on the AD-1272 are wired directly to a field controller on the BAS it is important to note that the high and low values for the Flow Output are configured in Feet per Minute (FPM) and the Temperature high and low values are in Deg F when imperial units are selected and Meters per Second (MPS) with Deg C when SI units are selected. -
Page 33: Bacnet Flow Alarm Configuration
Display Configuration submenu and flow configuration. Select the amount of time between any alarm condition and the BACnet Flow Alarm Low and High Alarm Delay activation. This value is adjustable between 0 and 10 minutes. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 34 3. Scroll through the submenu options and make any necessary updates. See Table 15 for a description of the BACnet Flow Alarm Configuration submenu selection options and their configurable options. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 35: Bacnet Temperature Alarm Configuration
Choose a value the temperature must go below for an alarm condition to exist. Alarm Low Setpoint Choose a value the temperature must surpass for an alarm condition to exist. Alarm High Setpoint AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 36 3. Scroll through the submenu options and make any necessary updates. See Table 16 for a description of the BACnet Temperature Alarm Configuration submenu selection options and their configurable options. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 37: Navigating The Supervisor Menu
It is also used to restore the device to a pre-installation state. 1. When the AD-1272 Airflow Measuring System’s LCD screen displays the average temperature and average velocity or volume, press MENU and UP or DOWN until the arrow is next to the Supervisor Menu. -
Page 38: Enable, Disable, And Change The Supervisor Pin
Alternatively, press ESC to return to the Supervisor Menu without updating the PIN. If the PIN settings are enabled, the PIN number must be entered each time the Supervisor Menu is Note: entered. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 39: Sensor Management
Probes are numbered with P=Primary, 0=First Achillary, 1=Second Anchillary, and so on. Sensor information is displayed on the left-most sensor in the enclosure at the end of the probe. When the Primary Transmitter with Display is located remotely the AD-1272 count the Primary Transmitter Note: as an additional probe. - Page 40 3. Press ENTER. The display indicates the number of active probes and sensors. In this example, one probe is active and enabled and two out of two sensors are valid and enabled. Figure 69: Probe and Sensor Display Screen AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 41 Figure 73: Sensor Status Display Screen 11. Press UP or DOWN to scroll to the probe to display on line 1 of the display. 12. Press ESC. The display returns to the Sensor Management submenu. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 42 18. Follow Steps 14 and 15 to disable the sensors. 19. Press UP or DOWN to scroll to the Display Probe Status submenu selection. Figure 78: Disable Probe Status Selection Screen AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
- Page 43 ENTER to display the probe data without going through the Probe Status submenu selection. 24. Press UP or DOWN to scroll to Exit this Menu and press ENTER to return to the Supervisor Menu. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 44: Reset Sensor Network
Primary probe returns to normal operation. 1. In the Supervisor Menu, press UP or DOWN to scroll to the Reset Sensors submenu. Figure 83: Reset Sensors Selection Screen AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... - Page 45 Figure 84: Enable Probes Display Screens The primary probe automatically resets all the sensors and devices and then restarts. After warming up, the primary probe returns to the normal operation mode. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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Page 46: Factory Default Reset
Display returns to normal operation and factory-default settings are restored. 1. In the Supervisor Menu, press UP or DOWN to scroll to the Factory Default submenu. Figure 86: Factory Default Selection Screen AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin... -
Page 47: Troubleshooting
The primary probe automatically resets all the sensors and devices and then restarts. After warming up, it returns to the normal operation mode. All settings are restored to their factory-default state. Troubleshooting Use Table 21 to troubleshoot problems with the AD-1272 Airflow Measuring System. Table 21: AD-1272 System Troubleshooting (Part 1 of 2) Problem... - Page 48 The device is not configured properly. Verify configuration parameters in the BACnet Network Configuration settings match what is required to communicate with the BAS. AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin...
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