Dwyer Instruments CDT Series Installation And Operating Instructions

Temperature Transmitter Specifications - Installation and Operating Instructions Bulletin AQ-CDT/CDTR-E/N Series CDT and CDTR Wall Mount Carbon Dioxide Temperature Transmitters accurately monitor the CO2 concentration and temperature in schools, office buildings, and other indoor environments to help achieve LEED® certification. Additionally, the Series CDTR also measures ambient relative humidity. For increased sensor life, a single-­beam dual-wavelength non-dispersive infrared (NDIR) sensor is used to automatically correct the measurement in both occupied and unoccupied buildings against aging effects. The single-beam dual-wavelength sensor technology provides the highest level of accuracy compared to Automatic Baseline Correction methods, which can unintentionally shift the calibration based on CO2 levels and barometric pressure conditions. In order to achieve a higher level of accuracy, the Series CDT includes digital barometric pressure adjustment and the ability to field-calibrate the sensor. Universal outputs allow users to select the transmitter output to be 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC to work with virtually any building management controller. An optional relay with user adjustable set points can be used to control exhaust fans, open actuated windows or dampers, or signal a light or horn. For applications that require visual indication, the Series CDT and CDTR can be ordered with an integral LCD display, Model A-449 or Model A-449A remote LCD display that can plug into the mini-connector port on the side of the transmitter. Both the CDT and CDTR can be configured to display temperature only, CO2 only, or CO2 and temperature together. The Series CDTR can also display relative humidity or CO2 and relative humidity together. Push buttons are standard on the transmitters for access to the menu structure, but the transmitter can be ordered without the buttons. To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection. Menu items that can be accessed include: engineering units, relay output set points, display configuration, transmitter output scaling, ambient barometric pressure and field calibration of the transmitter. Single-beam dual-wavelength sensor advantages: • Automatically corrects for aging effects in occupied and unoccupied buildings* ◦ Perfect for hospitals and manufacturing plants that are occupied 24 hours per day • Measures actual unfiltered light intensity directly ◦ Eliminates error from incorrect assumptions of gas concentration in theoretical logic assumption methods * For buildings occupied 24 hours per day, it is recommended that calibration be verified every 6 to 12 months depending on application. INSTALLATION SPECIFICATIONS Sensor: Single beam, dual-wavelength NDIR. Range: CO2: 0 to 2000 or 0 to 5000 ppm (depending on model); Temperature: 32 to 122°F (0 to 50°C). Accuracy: CO2: ±40 ppm ±3% of reading; RH: ±2% (10 to 90% RH) (for units configured with humidity output); Temperature: ±1°C @ 25°C. Temperature Dependence: ±8 ppm/°C at 1100 ppm. Non-Linearity: 16 ppm. Pressure Dependence: 0.13% of reading per mm of Hg. Response Time: 2 min for 99% step change. Temperature Limits: 32 to 122°F (0 to 50°C). Humidity Limits: 10 to 95% RH (non-condensing). Power Requirements: 16 to 35 VDC or 19 to 28 VAC. Power Consumption: Average: 2 w; Peak: 3.75 w. Output: Current: 4 to 20 mA (max. 500 Ω); Voltage: 0 to 5 VDC or 0 to 10 VDC (min. 500 Ω); Relay: SPST NO rated 2A @ 30 VDC; RTD or thermistor per r-t curves on page 4 (depending on model). Weight: 4.4 oz (125 g). Agency Approvals: CE. 3.65 [92.72] 3.56 [90.42] 1.08 [27.33] 4.50 [114.30] 2.80 [71.12] 1.10 [27.96] North American European LEED® is a registered trademark of the U.S. Green Building Council Disconnect power supply before installation to prevent electrical shock and equipment damage. Make sure all connections are in accordance with the job wiring diagram and in accordance with national and local electrical codes. Use copper conductors only. CAUTION Use electrostatic discharge precautions (e.g., use of wrist straps) during installation and wiring to prevent equipment damage. Avoid locations where severe shock or vibration, excessive moisture or corrosive fumes are present. Do not exceed ratings of this device, permanent damage not covered by warranty may result. Upon powering the transmitter, the firmware version will flash on the display. A warm up period of 30 minutes is required for the transmitter to adjust to the current CO2 concentration. Self calibration feature of the transmitter requires exposure to normal outdoor equivalent carbon dioxide level once every thirty days. NOTICE NOTICE NOTICE NOTICE NOTICE ® DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219/879-8000 Fax: 219/872-9057 www.dwyer-inst.com e-mail: [email protected]

2. Select the mounting location, away from diffusers, lights or any external influences. 3. Mount transmitter on a vertical surface to a standard electrical box using the two #6 M2C type screws provided. 4. Pull wires through sub base hole and make necessary connections. 5. Reattach cover to base plate. WIRING Use maximum 18 AWG wire for wiring to terminals. Refer to Figure 4 for wiring information. DIP SWITCH SETTINGS To access the DIP SWITCH, remove the cover of the unit as shown in Figure 2. The DIP SWITCH is located on the back of the circuit board. DIP Switch Position 1: CO2 Output Selection ON: Output set to voltage output OFF: Output set to current output DIP Switch Position 2: Temperature (CDT models) / Humidity (CDTR models) Output Selection ON: Output set to voltage output OFF: Output set to current output DIP Switch Positions 3 & 4: Current or Voltage Output Range Selection Dip Switch Position 5: Menu Access ON: Menu Enabled OFF: Menu Disabled Current / Voltage Outputs On the Series CDT, the transmitter may be wired for current or voltage output for both carbon dioxide and temperature. On the Series CDTR, the transmitter may be wired for current or voltage output for both carbon dioxide and humidity. The transmitter can be powered with either 16 to 35 VDC or 19 to 28 VAC. Wire the transmitter according to Figure 4. Remote Display For models that are ordered without an integral LCD display, remote display Model A-449 can be used to display the temperature, humidity, and carbon dioxide. The mini USB plug of the remote display plugs into the receptor on the side of the housing. After a short warm up time, the display will begin to show the current temperature and carbon dioxide measurements unless configured by the user to show humidity and carbon dioxide, only temperature, only humidity, or only carbon dioxide. EDITING MENU PARAMETERS Before any adjustment can be made to the transmitter, the Menu Lockout Dip Switch must be set to the ˝On˝ position (See Figure 3) ACCESSING MENU PARAMETERS Step 1: To enter the menu structure, press Up button and Down button simultaneously for 5 seconds (display will show RON parameter). Step 2: Press Up button or Down button to cycle between menu items. Step 3: Press Enter to edit the value for the displayed menu item (SET will appear on display). Step 4: Press Up button or Down button to adjust the value of the menu item. Step 5: Press Enter button to save the changes (SET will disappear). Step 6: Repeat Steps 2 through 5 for each of the parameters. Step 7: To exit the menu at any time, press and hold Up button and Down button simultaneously for 5 seconds or wait 10 seconds without pushing any buttons. PASSIVE TEMPERATURE SENSOR RELAY CONTACT POWER SUPPLY TEMP OR RH RECEIVER CO2 RECEIVER Figure 1: Removal Of Cover From Back Plate Figure 4: Active Output Wiring Diagram Figure 3 UP = “ON” DOWN = “OFF” DIP SWITCH #1 DIP SWITCH DIP SWITCH #6 Figure 2: Diagram Of Circuit Board Figure 5: Side View of Transmitter Dip Switch Output Range DIP Switch 3 Position DIP Switch 4 Position 2 to 10 V 4 to 20 mA ON OFF 0 to 10 V 0 to 20 mA OFF OFF 0 to 5 V 0 to 10 mA OFF ON 1 to 5 V 2 to 10 mA ON ON Optional relay can be used as either a dry contact or low voltage switched circuit up to 2 A at 30 VDC NOTICE Enter Up Remote Display Port Down

Sets the CO2 concentration which the optional relay is energized. Low limit: 0 PPM Factory setting: 1000 PPM High limit: 2000/5000 PPM (depending on model) Relay off set point Sets the CO2 concentration which the optional relay is de-energized. Setting value lower than RON provides direct action for detecting high concentrations of CO2. Setting value higher than RON provides indirect action for detecting low concentrations of CO2. Up button and Down button on the LCD display will be lit to indicate when the relay is energized. Low limit: 0 PPM Factory setting: 950 PPM High limit: 2000/5000 PPM (depending on model) Display configuration Determines the LCD display configuration during normal operation. The LCD display can indicate the CO2 concentration, temperature, relative humidity (Series CDTR only) and CO2 concentration combined with temperature or relative humidity (Series CDTR only). CH CO2 concentration and relative humidity (Series CDTR only) CT CO2 concentration and temperature TH Temperature and relative humidity (Series CDTR only) C CO2 concentration only T Temperature only H Relative humidity only (Series CDTR only) Units selection Temperature and barometric pressure measurements can be displayed in US engineering units or SI engineering units. The factory default is to display US engineering units. US units °F for temperature and in Hg for barometric pressure SI units °C for temperature and hPa for barometric pressure CO2 low output range Sets the CO2 concentration for the lowest output (4 mA or 0 VDC). Low limit: 0 PPM Factory setting: 0 PPM High limit: 2000/5000 PPM (depending on model) CO2 high output range Sets the CO2 concentration for the highest output (20 mA, 5 VDC or 10 VDC). When COH is set above COL, the transmitter is direct acting and the output will increase with an increase in CO2 level. When COH is below COL, the transmitter is reverse acting and the output will increase with a decrease in CO2 level. Low limit: 0 PPM Factory setting: 2000/5000 PPM (depending on model) High limit: 2000/5000 PPM (depending on model) Temperature low output range (Series CDT with active temperature only) Sets the temperature for the lowest output (4 mA or 0 VDC). Low limit: 32.0°F / 0.0°C Factory setting: 32.0°F / 0.0°C High limit: 122.0°F / 50.0°C Temperature high output range (Series CDT with active temperature only) Sets the temperature for the highest output (20 mA, 5 VDC or 10 VDC). When TOH is set above TOL, the transmitter is direct acting and the output will increase with an increase in temperature. When TOH is below TOL, the transmitter is reverse acting and the output will increase with a decrease in temperature. Low limit: 32.0°F / 0.0°C Factory setting: 122.0°F / 50.0°C High limit: 122.0°F / 50.0°C RON ROF DSP UNI COL COH TOL TOH HOL HOH BAR CAL RST Humidity low output range (Series CDTR only) Sets the humidity for the lowest output (4 mA or 0 VDC). Low limit: 0.0% Factory setting: 0.0% High limit: 100.0% Humidity high output range (Series CDTR only) Sets the humidity for the highest output (20 mA, 5 VDC or 10 VDC). When HOH is set above HOL, the transmitter is direct acting and the output will increase with an increase in humidity. When HOH is below HOL, the transmitter is reverse acting and the output will increase with a decrease in humidity. Low limit: 0.0% Factory setting: 100.0% High limit: 100.0% Barometric pressure Sets the typical barometric pressure for the location where the transmitter is mounted. The factory setting is for standard pressure at sea level. Adjusting the barometric pressure gives a more accurate measurement, especially at higher elevations. Refer to the elevation charts in Figure 9 for typical barometric pressures at a given elevation. Low limit: 20.0 in Hg / 677 hPa Factory setting: 29.9 in Hg / 1013 hPa High limit: 32.0 in Hg / 1084 hPa Calibration Calibrates the carbon dioxide sensor to a known gas value. Read calibration instructions before using this feature. Hold Enter button for 5 seconds. Reset to Factory Defaults Resets all menu settings to their default value, and clears zero and span. YES - Press & hold -- button for several seconds to reset settings NO - Press -- button to exit this menu item without resetting CALIBRATING SENSOR Step 1: Remove the cover as shown in Figure 1. Step 2: Remove one of the gas nipple covers on the CO2 sensor and attach tubing from the gas pressure regulator to the nipple (See Figure 6). Step 3: Attach the terminal block accessory to the circuit board so that the power wires line up with terminals 1 and 2. Plug in the power supply to power up the transmitter. Step 4: Hold housing so that the sensor is in the vertical plane as shown in Figure 6. Step 5: Follow the steps in the accessing parameter section to access the calibration parameter (CAL). Step 6: Press the Enter button. Step 7: Flow zero reference gas at 0.3 SLPM for 5 minutes. Step 8: Press and hold the Down button for 3 seconds. Step 9: Flow the full scale reference gas at 0.3 SLPM for 5 minutes. Step 10: Press and hold the Up button for 3 seconds. Step 11: Exit the parameter menu. Step 12: Disconnect the power supply from the power source and remove the terminal block from the circuit board. Step 13: Remove tubing from sensor and re-attach the gas nipple cover to the sensor. Step 14: Re-attach the cover to the back plate. North American Figure 6: Calibration Menu Descriptions European

Printed in U.S.A. 1/19 FR# 443800-30 Rev. 8 MAINTENANCE/REPAIR Upon final installation of the Series CDT and CDTR, no routine maintenance is required. The Series CDT and CDTR are not field serviceable and should be returned if repair is needed. Field repair should not be attempted and may void warranty. WARRANTY/RETURN Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes. Series CDT -2 N 4 4 -LCD Example: CDT-2N44-LCD Range 2 5 0 to 2000 ppm CO2 range 0 to 5000 ppm CO2 range Configuration N E North American Wall Mount European Wall Mount CO2 Output 4 4 to 20 mA / 0 to (5 or 10) VDC Temperature Output 0 4 A B C D E F None 4 to 20 mA / 0 to (5 or 10) VDC 10 KΩ NTC thermistor type III 10 KΩ NTC thermistor type II 3 KΩ NTC thermistor Pt100 Ω RTD Pt1000 Ω RTD 20 KΩ NTC thermistor Options LCD RLY NBC LCD display (wall only) Relay No buttons (wall only) US Customary Units ft in Hg 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200 5600 6000 6400 6800 7200 7600 8000 8400 8800 9200 9600 10000 29.92 29.50 29.10 28.69 28.29 27.90 27.51 27.13 26.76 26.39 26.02 25.66 25.30 24.95 24.60 24.26 23.93 23.60 23.27 22.94 22.63 22.31 22.00 21.70 21.40 21.40 SI Units m hPa 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 1013 1002 990 979 968 957 946 935 924 914 904 893 883 873 863 853 844 834 824 815 806 797 787 779 770 761 Series CDT -2 N 4 A 4 -LCD Example: CDTR-2N4A4-LCD Range 2 5 0 to 2000 ppm CO2 range 0 to 5000 ppm CO2 range Configuration N E North American Wall Mount European Wall Mount CO2 Output 4 4 to 20 mA / 0 to (5 or 10) VDC Temperature Output 0 4 A B C D E F None 4 to 20 mA / 0 to (5 or 10) VDC 10 KΩ NTC thermistor type III 10 KΩ NTC thermistor type II 3 KΩ NTC thermistor Pt100 Ω RTD Pt1000 Ω RTD 20 KΩ NTC thermistor RH Output 4 4 to 20 mA / 0 to (5 or 10) VDC Options LCD RLY NBC LCD display (wall only) Relay No buttons (wall only) Temperature Resistance Curves (in Ohms) °C °F A B C D E F -55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 -67.0 -58.0 -49.0 -40.0 -31.0 -22.0 -13.0 -4.0 5.0 14.0 23.0 32.0 41.0 50.0 59.0 68.0 77.0 86.0 95.0 104.0 113.0 122.0 131.0 140.0 149.0 158.0 167.0 176.0 185.0 194.0 203.0 212.0 221.0 230.0 239.0 248.0 257.0 266.0 275.0 284.0 293.0 302.0 607800.00 441200.00 323600.00 239700.00 179200.00 135200.00 102900.00 78910.00 61020.00 47540.00 37310.00 29490.00 23460.00 18780.00 15130.00 12260.00 10000.00 8194.00 6752.00 5592.00 4655.00 3893.00 3271.00 2760.00 2339.00 1990.00 1700.00 1458.00 1255.00 1084.00 939.30 816.80 712.60 623.60 547.30 481.80 425.30 376.40 334.00 297.20 265.10 237.00 963849.00 670166.00 471985.00 336479.00 242681.00 176974.00 130421.00 97081.00 72957.00 55329.00 42327.00 32650.00 25392.00 19901.00 15712.00 12493.00 10000.00 8057.00 6531.00 5326.00 4368.00 3602.00 2986.00 2488.00 2083.00 1752.00 1480.00 1255.00 1070.00 915.50 786.60 678.60 587.60 510.60 445.30 389.60 341.90 301.00 265.80 235.30 208.90 186.10 289154.70 201049.80 141595.50 100943.70 72804.30 53092.20 39126.30 29124.30 21887.10 16598.70 12698.10 9795.00 7617.60 5970.30 4713.60 3747.90 3000.00 2417.10 1959.30 1597.80 1310.40 1080.60 895.80 746.40 624.90 525.60 444.00 376.50 321.00 274.65 235.98 203.58 176.28 153.18 133.59 116.88 102.57 90.30 79.74 70.59 62.67 55.83 78.32 80.31 82.29 84.27 86.25 88.22 90.19 92.16 94.12 96.09 98.04 100.00 101.95 103.90 105.85 107.79 109.74 111.67 113.61 115.54 117.47 119.40 121.32 123.24 125.16 127.08 128.99 130.90 132.80 134.71 136.61 138.51 140.40 142.29 144.18 146.07 147.95 149.83 151.71 153.58 155.46 157.33 783.2 803.1 822.9 842.7 862.5 882.2 901.9 921.6 941.2 960.9 980.4 1000.0 1019.5 1039.0 1058.5 1077.9 1097.4 1116.7 1136.1 1155.4 1174.7 1194.0 1213.2 1232.4 1251.6 1270.8 1289.9 1309.0 1328.0 1347.1 1366.1 1385.1 1404.0 1422.9 1441.8 1460.7 1479.5 1498.3 1517.1 1535.8 1554.6 1573.3 2394000.00 1646200.00 1145800.00 806800.00 574400.00 413400.00 300400.00 220600.00 163500.00 122280.00 92240.00 70160.00 53780.00 41560.00 32340.00 25360.00 20000.00 15892.00 12704.00 10216.00 8264.00 6722.00 5498.00 4520.00 3734.00 3100.00 2586.00 2166.00 1822.60 1540.00 1306.40 1112.60 951.00 815.80 702.20 606.40 525.60 N/A N/A N/A N/A N/A Figure 7: Series CDT Model Chart Figure 9: Elevation Chart Figure 10: Resistance vs Temperature RESISTANCE VS TEMPERATURE TABLE Figure 8: Series CDTR Model Chart This symbol indicates waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice. DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219/879-8000 Fax: 219/872-9057 dwyer-inst.com e-mail: [email protected]