DWYER INSTRUMENTS, INC. phone: 219/879-8000
Contents
1. back plate without pinching the tubing 1200 300 979 between the back plate and the cover 1600 400 968 p A F 2000 500 957 Step 4 Follow the steps in the accessing parameter section to access the 400 500 346 calibration parameter CAL Step 5 Press hel ES button a Step 6 Flow zero reference gas at 0 3 SLPM for 5 minutes 3600 900 914 Step 7 Press and hold the 7 button for 3 seconds 4000 1000 Step 8 Flow the full scale reference gas at 0 3 SLPM for 5 minutes 4400 1100 Step 9 Press and hold the A button for 3 seconds 4800 0 883 Step 10 Exit the parameter menu 5200 Step 11 Remove cover as shown in Figure 1 5600 863 Step 12 Remove tubing from sensor and re attach the gas nipple cover to the 6000 0 853 me Eann i B4 Step 13 Re attach the cover to the back plate 7200 D 7600 0 815 MAINTENANCE 8000 0 8400 0 797 Upon final installation of the Series CDT Carbon Dioxide Transmitter and the 8800 0 787 companion receiver no routine maintenance is required A periodic check of the 9200 0 system calibration is recommended The Series CDT is not field serviceable and 9600 0 should be returned if repair is needed field repair should not be attempted and may 10000 761 void warranty Be sure to include a brief description of the problem plus any FIGURE 9 Elevation Chart relevant application notes Contact customer service to receive a return goods authorization number before shipping RESISTANCE VS TEMPERATURE TABLE Resistance Curves i2. 0 ppm Non Linearity 16 ppm Pressure Dependence 0 13 of reading per mm of Hg Response Time 2 minutes for 99 step change Ambient Operating Temperature 32 to 122 F 0 to 50 C Ambient Operating Humidity 10 to 95 RH non condensing Power Requirements 16 to 35 VDC 19 to 28 VAC Power Consumption Average 2 watts Peak 3 75 watts Sensor Single beam dual wavelength NDIR Output Current 4 to 20 mA max 500 Q Voltage 0 to 5 VDC or 0 to 10 VDC min 500 Q Relay SPST NO 2A 30 VDC RTD or thermistor per r t curves depending on model Weight 5 6 oz 158 8 g INSTALLATION 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 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 1 0 0 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 CO concentration on 0 Self calibration feature of the transmitter requires exposure to norm
3. 00 Relay 623 60 510 60 153 18 815 80 No buttons 547 30 445 30 133 59 702 20 481 80 389 60 116 88 606 40 FIGURE 8 Model Chart 425 30 341 90 102 57 525 60 376 40 301 00 90 30 N A 334 00 265 80 79 74 N A 297 20 235 30 70 59 N A 265 10 208 90 62 67 N A 237 00 186 10 55 83 N A FIGURE 10 Resistance vs Temperature Copyright 2011 Dwyer Instruments Inc Printed in U S A 3 11 FR 06 443800 00 Rev 2 DWYER INSTRUMENTS INC Phone 219 879 8000 www dwyer inst com P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Fax 219 872 9057 e mail info dwyer inst com
4. Bulletin AQ CDT Series CDT Carbon Dioxide Temperature Transmitter wy er 000 Series CDT Carbon Dioxide and Temperature Transmitters accurately monitor the CO2 concentration and temperature in schools office buildings and other indoor environments to help achieve LEED certification 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 CO 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 can be ordered with an integral LCD display or the Model A 449 remote LCD display that can plug into the mini connector port on the side of the transmitter The display can be configure
5. E 6 Menu Lockout Jumper ACCESSING MENU PARAMETERS Step 1 To enter the menu structure press A and CV Jsimultaneously for 5 seconds display will show RON parameter Step 2 Press A Jor 7 to cycle between menu items Step 3 Press to edit the value for the displayed menu item SET will appear on display Step 4 Press A or 7_ jto adjust the value of the menu item Step 5 Press 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 nd v simultaneously for 5 seconds or wait 10 seconds without pushing any buttons Menu Descriptions RON ROF DSP UNI COL Relay on set point Sets the CO 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 CO concentration which the optional relay is de energized Setting value lower than RON provides direct action for detecting high concentrations of CO Setting value higher than RON provides indirect action for detecting low concentrations of CO3 or 7 Jon 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 C
6. O concentration and the temperature the CO concentration only or the temperature only The factory default is to display both the temperature and the CO concentration CT CO concentration and temperature C CO concentration only T Temperature 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 SI units F for temperature and in Hg for barometeric pressure C for temperature and hPa for barometric pressure CO low output range Sets the CO 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 COH TOL TOH BAR CAL CO high output range Sets the CO 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 CO level When COH is below COL the transmitter is reverse acting and the output will increase with a decrease in CO 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 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 Sets
7. al outdoor equivalent carbon dioxide level once every thirty days Phone 219 879 8000 www dwyer inst com Fax 219 872 9057 e mail info dwyer inst com HINGE TO REMOVE COVER APPLY PRESSURE TO BOTTOM TAB WHERE NDICATED AND THE TWO PARTS WILL BECOME UNHINGED AT TOP REVERSE PROCESS TO APPLY COVER OUNTING ACK PLATE w BOTTOM TAB MOUNTING 1 Push tab on bottom of cover and lift cover from back plate See Figure 1 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 5 for wiring information FIGURE 2 Diagram Of Circuit Board Selection of Current and Voltage Outputs Prior to wiring verify that the current voltage selection jumpers PJ1 PJ2 and PJ5 are set to the desired output type Refer to Figure 2 to locate the selection jumpers See Figure 3 for diagram of the current voltage selection jumper For voltage output selection the output can be 0 to 10 VDC 0 to 5 VDC 2 to 10 VDC or 1 to 5 VDC See Figure 4 for the type of voltage output selection jumper PJ5 VOLTAGE OUTPUT CURRENT OUTPUT C V FIGURE 3 Current Voltage Output Selection Jump
8. d to display temperature only CO only or CO and temperature 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 jumper 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 e Automatically corrects for aging effects in occupied and unoccupied buildings o Perfect for hospitals and manufacturing plants that are occupied 24 hours per day e Measures actual unfiltered light intensity directly o Eliminates error from incorrect assumptions of gas concentration in theoretical logic assumption methods DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Specifications Installation and Operating Instructions 35 64 1 316 1 3 16 13 89 aag 20201 180 20 7 Bi ls 9 53 pl F 7 8 22 35 1 13 32 4x 3 16 35 72 4 76 Eaj 1 53 64 46 43 LANAN ma 86 52 4 13 32 50 01 SPECIFICATIONS Range COs 0 to 2000 or 0 to 5000 ppm depending on model Temperature 32 to 122 F 0 to 50 C Accuracy 40 ppm 3 of reading Temperature Dependence 8 ppm C at 110
9. er PJ1 And PJ2 C V E E E E 2 to 10 V 4 to 20 mA 1to5V 2 to 10 mA Oto 10V 0 to 20 mA 0to5V 0 to 10 mA FIGURE 4 Output Range Selection Jumper Current Voltage Outputs The transmitter may be wired for current or voltage output for both carbon dioxide and temperature The transmitter can be powered with either 16 to 35 VDC or 19 to 28 VAC Wire the transmitter according to Figure 5 1 Co g 0 S Optional relay can be used as either a dry contact or low voltage switched circuit up to 2 A at 30 VDC co2 RECEIVER RELAY CONTACT FIGURE 5 Active Output Wiring Diagram Thermistor and RTD Outputs Thermistor and RTD passive outputs are located on the back plate and do not require any power Passive temperature outputs are not polarity sensitive Remote Display For models that are ordered without an integral LCD display remote display Model A 449 can be used to display the temperature 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 only temperature or only carbon dioxide EDITING MENU PARAMETERS Before any adjustment can be made to the transmitter the Menu Lockout Jumper PJ4 must be set to the On position See Figure 6 ENABLED DISABLED MENU ON OFF ON FIGUR
10. n Ohms CO2 SENSOR A B Cc F 607800 00 963849 00 289154 70 2394000 00 441200 00 670166 00 201049 80 1646200 00 323600 00 471985 00 141595 50 1145800 00 239700 00 336479 00 100943 70 806800 00 179200 00 242681 00 72804 30 574400 00 135200 00 176974 00 53092 20 413400 00 102900 00 130421 00 39126 30 300400 00 78910 00 97081 00 29124 30 220600 00 61020 00 72957 00 21887 10 163500 00 47540 00 55329 00 16598 70 122280 00 37310 00 42327 00 12698 10 92240 00 29490 00 32650 00 9795 00 70160 00 23460 00 25392 00 7617 60 53780 00 18780 00 19901 00 5970 30 41560 00 15130 00 15712 00 4713 60 32340 00 12260 00 12493 00 3747 90 25360 00 10000 00 10000 00 3000 00 20000 00 8194 00 8057 00 2417 10 15892 00 6752 00 6531 00 1959 30 12704 00 Example CDT 2W44 LCD 5592 00 5326 00 1597 80 10216 00 Range 0 to 2000 ppm CO range 4655 00 4368 00 1310 40 8264 00 0 to 5000 ppm CO range 3893 00 3602 00 1080 60 6722 00 Configuration Wall 3271 00 2986 00 895 80 5498 00 CO Output 4 to 20 mA 0 to 5 or 10 VDC aes eas oe cae Temperature 0 None 5 Output 4 4 to 20 mA 0 to 5 or 10 VDC 1990 00 1752 00 525 60 3100 00 A 10 KQ NTC thermistor type III 1700 00 1480 00 444 00 2586 00 oe 128800 107000 221 00 182260 C 3 KQ NTC thermistor D Pt100 Q RTD 1084 00 915 50 274 65 1540 00 E Pt1000 Q RTD 939 30 786 60 235 98 1306 40 F 20 KQ NTC thermistor 816 80 678 60 203 58 1112 60 LCD display 712 60 587 60 176 28 951
11. 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 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 600 hPa Factory setting 29 9 in Hg 1013 hPa High limit 32 0 in Hg 1100 hPa Calibration Calibrates the carbon dioxide sensor to a known gas value Read calibration instructions before using this feature Hold for 5 seconds CALIBRATING SENSOR US Customary Units SI Units ft m hPa Step 1 Remove the cover as shown in Figure 1 D 1013 Step 2 Slide the calibration tubing through the slots on the back plate and attach 400 100 1002 to one of the nipples on the CO sensor See Figure 7 800 200 Step 3 Carefully re attach the cover to the
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