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AD-1272 Advanced Thermal Dispersion Probe Airflow Measuring System Technical Bulletin

32

1. In the Operator Menu, press

UP or DOWN

to scroll to the BACnet Network Configuration submenu.

2. Press

ENTER

.

3. Scroll through the submenu options and make any necessary updates. See Table 14 for a description of the

BACnet Network Configuration submenu selection options and their configurable options.

Note:

If any changes are made to the BACnet Network Configuration parameters after turning on BACnet, you
must change the BACnet On/Off setting off and back on again to get the changes to take effect.

BACnet Objects

If BACnet communications is enabled on the AD-1272 and all parameters are correctly set (see Figure 57) the
BACnet objects listed below will be available to the Building Automation System (BAS). The units for the BACnet
objects will be the same as the units the display is configured for. For example, if the display is setup to show flow
on CFM, the units for the BACnet Flow objects will also be in CFM. The Flow and Temperature alarms must be
enabled in the AD-1272 (see Figure 59 through Figure 61) for the points to be map able to the BAS.

•

Flow

•

Temperature

•

Low Flow Alarm (if enabled)

•

High Flow Alarm (if enabled)

•

Low Temperature Flow (if enabled)

•

High Temperature Flow (if enabled)

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. If there is a need to convert the BAS to a different unit, calculate the corresponding values for the
units of measure and program the input’s high and low values with the calculated values. For example, if you have
a 24 x 24 in. (4 square feet) duct and the High Flow Output in the transmitter is set to 5000 FPM (default), the
corresponding high CFM value will be 20,000 CFM, see equation below.
[(24 in. x 24 in.)/144 square inches per square foot] x 5000 FPM = 20,000 CFM
The scaling for the input receiving the signal should be configured from 0 to 20,000 CFM.

Figure 58: BACnet Network Configuration Selection Screen

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Содержание AD-1272

Страница 1: ...isplay 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 Bala...

Страница 2: ... Network Configuration 31 BACnet Objects 32 Hardware Objects 32 BACnet Flow Alarm Configuration 33 BACnet Temperature Alarm Configuration 35 Navigating the Supervisor Menu 37 Enable Disable and Change the Supervisor PIN 38 Sensor Management 39 Reset Sensor Network 44 Factory Default Reset 46 Troubleshooting 47 ...

Страница 3: ...shooting these devices used in plenum and duct applications 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 When the device is first powered on the display ...

Страница 4: ...average temperature and average velocity or volume in the units selected When the display is configured for the International System of Units SI the display shows the temperature in Celsius and the average velocity in meters per second or the volume as liters per minute See Table 3 for the available units When the display is configured for Imperial the display shows the temperature in Fahrenheit a...

Страница 5: ...ay Mode the second line can be too long to display everything at once When this occurs the display will flash between the value and the unit Navigating the Menu Options The left arrow symbol appears on the left side of the currently selected menu submenu or option Press ENTER to access the selected option The up and down arrow symbol on line two of the display indicates that the selected digit or ...

Страница 6: ...it at a time beginning with the leftmost digit Press UP or DOWN to scroll through the numbers 0 through 9 2 When the correct number is displayed press ENTER to select the digit The cursor automatically moves to the next position If an error is made after you press ENTER press ESC to go back and change the digit Note If the PIN is not correctly entered the display returns to normal operation Note I...

Страница 7: ...ffset to apply to the reported average temperature including front panel display BACnet and Analog Outputs 1 and 2 K Factor Configuration K Factor Config Turns the K Factor on and off and allows for the calculation or selection of gain and offset values Menu Inactivity Timeout Menu Timeout Selects a time period after which the backlight on the front panel display turns off when no menu activity is...

Страница 8: ...date the PIN 1 Enter the Change Operator PIN submenu 2 Press UP or DOWN to scroll through the numbers 0 through 9 3 When the correct number is displayed press ENTER to select the digit The cursor automatically moves to the next position If an error is made after pressing ENTER press ESC to return to the previous digit 4 Enter the last digit and press ENTER to store the PIN number The display retur...

Страница 9: ...rted to Cubic Feet Per Minute CFM to correspond to the output ENTER ESC Duct Height 010 0 in Duct Major Axis 010 0 in Calc d Duct Area 0 69 sq ft ENTER ENTER ESC ENTER ESC ENTER ENTER Site Elevation Relative Humidity Flow Units Output Lockout Exit this Menu Flow Con guration Display Con guration Menu Selected Submenu Submenu Selections Submenu Selection Display Output Lockout Exit this Menu Duct S...

Страница 10: ...Area Scroll between 0 to 100 square feet or 0 to 9 3 square meters A value not stored or an out of range error displays if the entry exceeds the design range The units are previously determined Site Elevation Select between 0 to 15 000 feet or 0 to 4 572 meters The units are previously determined Relative Humidity Select between 0 and 99 relative humidity 1 at a time Holding the button increases t...

Страница 11: ...H Standard Liters Per Second SLPS Standard Liters Per Minute SLPM Standard Cubic Meters Per Hour SCMH 1 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 Table 4 Volumetric Units of Measurement Part 2 of 2 Volumetri...

Страница 12: ...lect between SI and Imperial Display Flow Type Select between velocity and volume Line 2 Parameters Select between System Flow and Custom Text for text appearing in line 2 of the display Line 2 Custom Select up to seven ASCII characters to display in line 2 of the display See Selecting Custom Text for more information Figure 15 Display Configuration Flowchart Selected Submenu Submenu Selections Su...

Страница 13: ...croll to the Display Configuration submenu 2 Press ENTER 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 Figure 16 Display Configuration Selection Screen ...

Страница 14: ...4 Fill the line with characters for the remaining positions After the seventh character is entered the custom text is stored in memory and the display returns to the Display Configuration submenu Analog Output 1 Parameters The Analog Output 1 Parameters submenu is used to select the process variables that Output 1 represents Available process variables include flow temperature and none If flow is ...

Страница 15: ...ress 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 Table 6 Analog Output 1 Submenu Selection and Configurable Option Analog Output 1 Submenu Selection Configurable Option Output 1 Parameters Select between none flow and temperature Figure 18 Analog Output 1 Parameters Flowchart A...

Страница 16: ...log Output 2 is temperature Updating Analog Output 2 1 In the Operator Menu press UP or DOWN to scroll to the Analog Output 2 submenu 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 Table 7 Analog Output 2 Submenu and Configurable Options Analog Output 2 Submenu Configurabl...

Страница 17: ... equal to 10 filtering For example 2 is equal to 20 Updating Temperature Output LPF 1 In the Operator Menu press UP or DOWN to scroll to the Temperature Output LPF submenu 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 Table 8 Temperature Output LPF Submenu Selectio...

Страница 18: ...to 10 filtering For example 2 is equal to 20 Updating Low Output LPF 1 In the Operator Menu press UP or DOWN to scroll to the Flow Output LPF submenu 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 Table 9 Flow Output LFP Submenu Selection and Configurable Option Flo...

Страница 19: ...WN ENTER ENTER ESC or ENTER ESC ENTER ESC or ENTER Output 2 Offset ENTER ESC or ENTER UP DOWN Output 2 Low Span ENTER UP DOWN ESC or ENTER UP DOWN Design Range Low ENTER ESC ENTER Default values shown DOWN UP Output 1 High Span ESC or ENTER ENTER Output 2 High Span ESC or ENTER ENTER DOWN UP Design Range High ENTER ESC DOWN UP Output 1 Offset Temperature Range Low ENTER ESC DOWN UP ENTER ESC DOWN ...

Страница 20: ...enu Selections Configurable Options Output 1 mA Offset Select between 2 to 2 mA adjustment range Output 1 mA Low Span Select between 1 to 4 mA Output 1 mA High Span Select between 1 to 20 mA This value must be higher than the low span value of Output 1 Output 2 mA Offset Select between 2 to 2 mA adjustment range Output 2 mA Low Span Select between 1 to 4 mA Output 2 mA High Span Select between 1 t...

Страница 21: ...ti meter should read a minimum value of 4 00 0 01 mA as determined in Output 1 Span 6 Press UP or DOWN to adjust the output Once the last digit is entered the digital multi meter reflects the adjusted Output 1 offset value 7 Press UP or DOWN in the Output Calibration submenu to scroll to the Output 1 mA Low Span submenu selection 8 Press ENTER The display indicates the current Output 1 low span va...

Страница 22: ... process See Analog Output 1 Parameters for instructions 14 Repeat Steps 1 through 13 for Analog Output 2 In Step 5 connect the digital multi meter across terminals A02 plus and minus 15 After both outputs are configured as necessary configure the Design Range Low Design Range High Temperature Range Low and Temperature Range High submenu selections 16 In the Operator Menu press UP and DOWN to scro...

Страница 23: ... and Configurable Options Temperature Balance Configuration Submenu Selections Configurable Options Temperature Balance Enable Select On or Off TemperatureOffset Selection Enter the currently selected value The temperature displayed on the left side of line 2 is the offset and the value on the right side of line 2 is a live view of the current temperature with the last confirmed offset value The o...

Страница 24: ...late K Factor is set toYes 3 Only when of Data Pointsis set to1 or higher 4 Only when of Data Points is set to2 or higher 5 Only when of Data Points is set to 3 ENTER ESC K Factor Gain1 UP DOWN ESC ENTER K Factor Offset1 UP DOWN ESC ENTER of Data Points2 UP DOWN ESC ENTER System at UP DOWN 3 seconds Velocity UP DOWN ESC ENTER System at UP DOWN 3 Seconds UP DOWN ESC ENTER System at 3 2 5 UP DOWN 3 ...

Страница 25: ...actor is set to Yes Select between one to three points for calculating the K Factor System at Point 12 Record the current velocity over the sensors as reference point 1 Point 1 Velocity2 Update the currently selected value Reference point 1 is displayed on the right side and the measured value is entered on the left System at Point 22 Record the current velocity over the sensors as reference point...

Страница 26: ...ction If No is selected see Automatic Calculation of K Factor Not Enabled If Yes is selected see Automatic Calculation of K Factor Enabled Automatic Calculation of K Factor Not Enabled 1 When K Factor is not enabled the K Factor Configuration submenu formats itself for manual K Factor entry mode Scroll to the K Factor Gain submenu selection and press ENTER 2 Press ENTER to adjust the manual K Fact...

Страница 27: ...One data point calculates and uses one offset Two data points calculate and use one offset and one gain in one equation Three data points calculate and use two offsets and two gains in two equations that meet at the middle point 1 In the K Factor Configuration submenu scroll to the Number of Data Points submenu selection 2 Press ENTER Press UP or DOWN to select the number of points to use in the K...

Страница 28: ...selection 7 Press ENTER to enter the first measured K Factor setpoint that is acquired from an external device Press UP or DOWN to modify the currently selected digit Note The left side of the display indicates the measured value and the right side shows the corresponding reference value that was recorded for that point 8 Press ENTER on the last digit to confirm the value and return to the K Facto...

Страница 29: ...erate the K Factor equation values Note When one data point is selected the display indicates the K Factor Generated and Calculated Offset 1 screens 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 52 Generate KF Selection Screen Figure 53 K Factor Equ...

Страница 30: ... if no activity is detected in the Operator Menu 1 In the Operator Menu press UP or DOWN to scroll to the Menu Timeout submenu 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 Table 13 Menu Timeout Submenu Selection and Configurable Option Menu Timeout Submenu Selection Config...

Страница 31: ... to 4 194 302 BACnet Address Select a value between 4 and 127 Holding down the button increases the rate the value updates BACnet Max Mast Select a value between 1 and 127 Holding down the button increases the rate the value updates BACnet Baud Rate Select the 9 600 19 200 38 400 default or 76 800 baud rate Figure 57 BACnet Configuration Flowchart BACNet Instance BACNet Network BACNet On Off UP DO...

Страница 32: ...ature alarms must be enabled in the AD 1272 see Figure 59 through Figure 61 for the points to be map able to the BAS Flow Temperature Low Flow Alarm if enabled High Flow Alarm if enabled Low Temperature Flow if enabled High Temperature Flow if enabled 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 ...

Страница 33: ...point Choose a value of flow the controller must reach above the Alarm Low Setpoint for Alarm Low or below the Alarm High Setpoint for Alarm High before an activated alarm resets The display units are the same as those chosen in the Display Configuration submenu and flow configuration Alarm Delay Select the amount of time between any alarm condition and the BACnet Flow Alarm Low and High activatio...

Страница 34: ...WN to scroll to the BACnet Flow Alarm Configuration submenu 2 Press ENTER 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 Figure 60 BACnet Flow Alarm Configuration Selection Screen ...

Страница 35: ...Off Select On or Off Alarm High On Off Select On or Off Alarm Low Setpoint Choose a value the temperature must go below for an alarm condition to exist Alarm High Setpoint Choose a value the temperature must surpass for an alarm condition to exist Figure 61 BACnet Temperature Alarm Configuration Flowchart UP DOWN Alarm High On Off BACNet Temperature Alarm Low On Off UP DOWN ENTER ENTER ESC or ENTE...

Страница 36: ...ature the controller must reach above the Alarm Low Setpoint for Alarm Low or below the Alarm High Setpoint for Alarm High before an activated alarm resets The display units are the same as those chosen in the Display Configuration submenu Alarm Delay Select the amount of time between any alarm condition and the BACnet Temperature Alarm Low and High activation This value is adjustable between 0 an...

Страница 37: ... error is made after pressing ENTER press ESC to go back and change the digit Note If the PIN is not correctly entered the display returns to normal operation b If the Supervisor PIN is not enabled the Supervisor Menu selections display Note See Enable Disable and Change the Supervisor PIN for more information about enabling the PIN 3 Press UP or DOWN to scroll through the available menu selection...

Страница 38: ...he cursor automatically moves to the next position If an error is made after pressing ENTER press ESC to return to the previous digit 4 Enter the last digit and press ENTER to store the PIN number The display returns to the Supervisor Menu submenu display Alternatively press ESC to return to the Supervisor Menu without updating the PIN Note If the PIN settings are enabled the PIN number must be en...

Страница 39: ...Transmitter with Display is located remotely the AD 1272 count the Primary Transmitter as an additional probe This will cause the number of probes to be shown as one greater than the number of ancillary probes Figure 66 Sensor Management Flowchart UP DOWN Scan forSensors Sensor Management UP DOWN ENTER ENTER ESC or ENTER ESC ENTER Display Sensor Status ENTER ESC UP DOWN Enable Sensors ENTER UP DOW...

Страница 40: ...eration Display Sensor Status Select the probe addresses on the probe network P 0 through F 1 V indicates a valid address and D indicates a disabled address Enable Sensors Select between probes P 0 through F 1 then select between sensors Choose the sensor 1 through 8 to enable 1 The primary probe P is displayed first Ancillary probes use hexadecimal base 16 numbering The hexadecimal number corresp...

Страница 41: ... for sensors The primary probe provides scan and restart commands to the network 7 Once the scan is complete the display returns to the normal operation mode Press MENU 8 Press UP or DOWN to scroll to the Supervisor Menu Press ENTER 9 Press UP or DOWN to scroll to the Display Sensor Status submenu 10 Press ENTER The display indicates the following message 11 Press UP or DOWN to scroll to the probe...

Страница 42: ...y selecting this option and press ENTER 16 Press ESC The display returns to the Sensor Management submenu 17 Scroll to the Disable Sensors submenu selection and press ENTER 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 74 Enable Sensors Selection Screen Figure 75 Probe Selection Display Screen Figure 76 Probe Sel...

Страница 43: ...ors 1 through 8 Press ESC to return to the Probe Data screen 23 Press UP or DOWN to scroll the menu display to the remaining probes or press ESC to return to the Sensor Management menu Note In the Sensor Management submenu press UP or DOWN to scroll to the Display Probe Data submenu selection and press ENTER to display the probe data without going through the Probe Status submenu selection 24 Pres...

Страница 44: ... the Reset Sensors submenu Table 19 Reset Sensor Network Submenu Selections and Display Screens Reset Sensor Network Submenu Selection Display Screens Reset Sensors Primary probe commands all probes to re enable all sensors and to restart Primary probe performs a sensor scan and re enables sensors to get an inventory from the probe network Primary probe returns to normal operation Figure 82 Reset ...

Страница 45: ...em Technical Bulletin 45 2 Press ENTER The display appears as follows 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 Figure 84 Enable Probes Display Screens ...

Страница 46: ...tory Default submenu Table 20 Factory Default Reset Submenu Selection and Display Screens Factory Default Reset Submenu Selection Actions and Display Screens Factory Default Cycle power from probe to re enable all sensors and restart the auxiliary devices Perform a local sensor scan and re enable local sensors to get an inventory from the probe network Display returns to normal operation and facto...

Страница 47: ...Airflow Measuring System Table 21 AD 1272 System Troubleshooting Part 1 of 2 Problem Possible Cause Corrective Action Airflow readings do not match what T B is reporting Turbulent or non uniform airflow across the air measurement station Use Automatic K factor Configuration and use 1 point calibration if only gain is required If flow is non linear use two or three point calibration feature Install...

Страница 48: ...e not swapped AO Probe Network and BACnet ports on the primary fit into any of the plugs so make sure connections are correct on the board Duplicate addresses on Probe Network Verify each ancillary probe has a unique address by checking the rotary dial position No BACnet communication with the BAS Network wires terminated to the incorrect point or the wrong connector Verify wiring using the BACnet...

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