CDT series installation manual

CDT series installation manual
Bulletin AQ-CDT/CDTR
Series CDT and CDTR Duct Mount Carbon Dioxide/
Temperature/Relative Humidity Transmitter
Specifications - Installation and Operating Instructions
1/8˝
[3.175]
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 the Model A-449 remote LCD display that can plug into the miniconnector port on the internal circuit board. Both the CDT and CDTR can be
configured to display temperature only, CO2 only or CO2 and temperature
together. The CDTR can also display relative humidity or CO2 and relative
humidity together. 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.
2-13/16˝
[71.238]
SpECIfICATIONS
Range:
CO2: 0 to 2000 or 0 to 5000 ppm (depending on model);
Relative Humidity: 0 to 100%
Temperature: 32 to 122°F (0 to 50°C).
Accuracy: ±40 ppm + 3% of reading (CO2); ±2% (RH).
Thermal Effect: ±8 ppm / °C at 1100 ppm.
Non-Linearity: 16 ppm.
Barometric 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 Ω);
Voltage: 0 to 5 VDC or 0 to 10 VDC (min 500 Ω);
Relay: SPST NO 2A @ 30 VDC;
RTD or thermistor per r-t curves (depending on model).
Weight: 5.6 oz (158.8 g).
INSTALLATION
WARNING
Single-beam dual-wavelength sensor advantages:
• Automatically corrects for aging effects in occupied and unoccupied buildings
o Perfect for hospitals and manufacturing plants that are occupied 24 hours per
day
• Measures actual unfiltered light intensity directly
o Eliminates error from incorrect assumptions of gas concentration in theoretical
logic assumption methods
1-15/64˝
[31.411]
4-9/32˝
[108.912]
Ø3-5/16˝
[84.074]
Series CDT and CDTR Duct Mount 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 nondispersive 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.
11-49/64˝
[298.956]
4-25/32˝
[121.612]
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.
CAUTION
Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present.
CAUTION
Do not exceed ratings of this device, permanent damage not
covered by warranty may result.
NOTICE
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.
NOTICE
Self calibration feature of the transmitter requires exposure to
normal outdoor equivalent carbon dioxide level once every thirty
days.
LEED® is a registered trademark of the U.S. Green Building Council.
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]
MOUNTING
1. Cut hole into duct large enough to insert probe.
2. Attach housing ears to duct using the two self-tapping screws provided.
3. Knock out an opening in the housing and attach an electrical fitting to route
electrical wiring. PG11 & PG16 knockouts are molded into the housing.
WIRING
Use maximum 18 AWG wire for wiring to terminals. Refer to Figure 5 for wiring
information.
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.
NOTICE
Optional relay can be used as either a dry contact or low voltage
switched circuit up to 2 A at 30 VDC.
POWER
TEMP OR RH
SUPPLY
RECEIVER
CO2
ENTER PUSH BUTTON
UP PUSH BUTTON
RECEIVER
REMOTE DISPLAY
CONNECTOR
RELAY
CONTACT
DOWN PUSH
BUTTON
CONFIGUATION
SWITCHES
PASSIVE
TEMPERATURE
SENSOR
TERMINAL
BLOCK
fIGURE 1: Diagram Of Circuit Board
fIGURE 4: Active Output Wiring Diagram
Selection of Current and Voltage Outputs
Prior to wiring, verify that the current/voltage configuration switches (positions 1 and
2) are set to the desired output type. Refer to Figure 2 to locate the configuration
switches. See Figure 3 for diagram of the current/voltage selection switches. 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 switches (positions
3 & 4).
VOLTAGE
CURRENT
CO2 CONCENTRATION
OUTPUT SELECTION
VOLTAGE
Thermistor and RTD Outputs
Thermistor and RTD passive outputs are located on terminals 7 and 8 and do not
require any power. Passive temperature outputs are not polarity sensitive.
Remote Display
Remote display Model A-449 can be used to display the relative humdity,
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.
CURRENT
TEMPERATURE/
RH OUTPUT SELECTION
ACCESSING MENU pARAMETERS
Step 1: To enter the menu structure, press
and
5 seconds (display will show RON parameter).
fIGURE 2: Current/Voltage Output
Selection Jumper (pJ1 And pJ2)
Step 2: Press
or
simultaneously for
to cycle between menu items.
Step 3: Press
to edit the value for the displayed menu item (SET will appear
on display).
0-10 V
0-20 mA
2-10 V
4-20 mA
0-5 V
0-10 mA
fIGURE 3: Output Range Selection Jumper
1-5 V
2-10 mA
Step 4: Press
Step 5: Press
or
to adjust the value of the menu item.
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
and
simultaneously for 5 seconds or wait 10 seconds without pushing any buttons.
Menu Descriptions
RON Relay on set point
Sets the CO2 concentration which the optional relay is energized.
Low limit:
Factory setting:
High limit:
0 PPM
1000 PPM
2000/5000 PPM (depending on model)
ROf 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
or
on the LCD display will be lit to indicate
concentrations of CO2.
when the relay is energized.
Low limit:
Factory setting:
High limit:
0 PPM
950 PPM
2000/5000 PPM (depending on model)
DSp Display configuration
Determines the LCD display configuration during normal operation. The LCD
display can indicate the CO2 concentration, temperature, relative humidity
(CDTR only) and CO2 concentration combined with temperature or relative
humidity (CDTR only).
CH
CT
C
T
H
UNI
CO2 concentration and relative humidity (CDTR only)
CO2 concentration and temperature
CO2 concentration only
Temperature only
Relative humidity only (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
SI units
F for temperature and in Hg for barometeric pressure
C for temperature and hPa for barometric pressure
COL CO2 low output range
Sets the CO2 concentration for the lowest output (4 mA or 0 VDC).
Low limit:
Factory setting:
High limit:
0 PPM
0 PPM
2000/5000 PPM (depending on model)
COH 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)
TOL Temperature low output range (CDT with active temperature only)
Sets the temperature for the lowest output (4 mA or 0 VDC).
Low limit:
Factory setting:
High limit:
32.0°F / 0.0°C
32.0°F / 0.0°C
122.0°F / 50.0°C
TOH Temperature high output range (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:
Factory setting:
High limit:
32.0°F / 0.0°C
122.0°F / 50.0°C
122.0°F / 50.0°C
HOL Humidity low output range (CDTR only)
Sets the temperature for the lowest output (4 mA or 0 VDC).
Low limit:
Factory setting:
High limit:
0.0%
0.0%
100.0%
HOH Humidity high output range (CDTR only)
Sets the temperature 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 temperature. When HOH is below HOL,
the transmitter is reverse acting and the output will increase with a decrase
in temperature.
Low limit:
Factory setting:
High limit:
0.0%
100.0%
100.0%
BAR 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:
Factory setting:
High limit:
20.0 in Hg / 600 hPa
29.9 in Hg / 1013 hPa
32.0 in Hg / 1100 hPa
CAL Calibration
Calibrates the carbon dioxide sensor to a known gas value. Read
calibration instructions before using this feature. Hold
for 5 seconds.
CALIBRATING SENSOR
Step 1: Slide probe into sealed calibration tube.
Step 2: Tighten screws to lock probe in place.
Step 3: Attach gas to the calibration tube.
Step 4: Follow the steps in the accessing parameter section to access the
calibration parameter (CAL).
Step 5: Press the
button.
Step 6: Flow zero reference gas at 0.3 SLPM for 5 minutes.
button for 3 seconds.
Step 7: Press and hold the
Step 8: Flow the full scale reference gas at 0.3 SLPM for 5 minutes.
button for 3 seconds.
Step 9: Press and hold the
Step 10: Exit the parameter menu.
Step 11: Loosen screws to release probe.
Step 12: Remove probe from sealed calibration tube.
US Customary Units
ft
in Hg
0
29.92
400
29.50
800
29.10
1200
28.69
1600
28.29
2000
27.90
2400
27.51
2800
27.13
3200
26.76
3600
26.39
4000
26.02
4400
25.66
4800
25.30
5200
24.95
5600
24.60
6000
24.26
6400
23.93
6800
23.60
7200
23.27
7600
22.94
8000
22.63
8400
22.31
8800
22.00
9200
21.70
9600
21.40
10000
21.40
MAINTENANCE/REpAIR
Upon final installation of the Series CDT/CDTR, no routine maintenance is
required. The Series CDT/CDTR is 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.
CDT -2 D 4 4 -LCD
2
5
D
Configuration
4
CO2 Output
0
Temperature
4
Output
A
B
C
D
E
F
LCD
Options
RLY
NBC
Series
Range
Example: CDT-2W44-LCD
0 to 2000 ppm CO2 range
0 to 5000 ppm CO2 range
Duct
4 to 20 mA / 0 to (5 or 10) VDC
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
LCD display
Relay
No buttons
fIGURE 5: Model Chart
CDTR -2 D 4 A 4 -LCD
2
5
D
Configuration
4
CO2 Output
0
Temperature
A
Output
B
C
D
E
F
4
RH Output
LCD
Options
RLY
NBC
Series
Range
Example: CDT-2W44-LCD
0 to 2000 ppm CO2 range
0 to 5000 ppm CO2 range
Duct
4 to 20 mA / 0 to (5 or 10) VDC
None
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
4 to 20 mA / 0 to (5 or 10) VDC
LCD display
Relay
No buttons
fIGURE 6: CDTR Model Chart
SI Units
m
hpa
0
1013
100
1002
200
990
300
979
400
968
500
957
600
946
700
935
800
924
900
914
1000
904
1100
893
1200
883
1300
873
1400
863
1500
853
1600
844
1700
834
1800
824
1900
815
2000
806
2100
797
2200
787
2300
779
2400
770
2500
761
fIGURE 7: Elevation Chart
RESISTANCE
Temperature
°f
°C
-67.0
-55
-58.0
-50
-49.0
-45
-40.0
-40
-31.0
-35
-22.0
-30
-13.0
-25
-4.0
-20
5.0
-15
14.0
-10
23.0
-5
32.0
0
41.0
5
50.0
10
59.0
15
68.0
20
77.0
25
86.0
30
95.0
35
104.0
40
113.0
45
122.0
50
131.0
55
140.0
60
149.0
65
158.0
70
167.0
75
176.0
80
185.0
85
194.0
90
203.0
95
100 212.0
105 221.0
110 230.0
115 239.0
120 248.0
125 257.0
130 266.0
135 275.0
140 284.0
145 293.0
150 302.0
VS TEMpERATURE TABLE
Resistance Curves (in Ohms)
C
B
A
607800.00 963849.00 289154.70
441200.00 670166.00 201049.80
323600.00 471985.00 141595.50
239700.00 336479.00 100943.70
179200.00 242681.00 72804.30
135200.00 176974.00 53092.20
102900.00 130421.00 39126.30
78910.00 97081.00 29124.30
61020.00 72957.00 21887.10
47540.00 55329.00 16598.70
37310.00 42327.00 12698.10
9795.00
29490.00 32650.00
7617.60
23460.00 25392.00
5970.30
18780.00 19901.00
4713.60
15130.00 15712.00
3747.90
12260.00 12493.00
3000.00
10000.00 10000.00
2417.10
8057.00
8194.00
1959.30
6531.00
6752.00
1597.80
5326.00
5592.00
1310.40
4368.00
4655.00
1080.60
3602.00
3893.00
895.80
2986.00
3271.00
746.40
2488.00
2760.00
624.90
2083.00
2339.00
525.60
1752.00
1990.00
444.00
1480.00
1700.00
376.50
1255.00
1458.00
321.00
1070.00
1255.00
274.65
915.50
1084.00
235.98
786.60
939.30
203.58
678.60
816.80
176.28
587.60
712.60
153.18
510.60
623.60
133.59
445.30
547.30
116.88
389.60
481.80
102.57
341.90
425.30
90.30
301.00
376.40
79.74
265.80
334.00
70.59
235.30
297.20
62.67
208.90
265.10
55.83
186.10
237.00
D
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
f
E
783.2 2394000.00
803.1 1646200.00
822.9 1145800.00
806800.00
842.7
574400.00
862.5
413400.00
882.2
300400.00
901.9
220600.00
921.6
163500.00
941.2
122280.00
960.9
92240.00
980.4
70160.00
1000.0
53780.00
1019.5
41560.00
1039.0
32340.00
1058.5
25360.00
1077.9
20000.00
1097.4
15892.00
1116.7
12704.00
1136.1
10216.00
1155.4
8264.00
1174.7
6722.00
1194.0
5498.00
1213.2
4520.00
1232.4
3734.00
1251.6
3100.00
1270.8
2586.00
1289.9
2166.00
1309.0
1822.60
1328.0
1540.00
1347.1
1306.40
1366.1
1112.60
1385.1
951.00
1404.0
815.80
1422.9
702.20
1441.8
606.40
1460.7
525.60
1479.5
N/A
1498.3
N/A
1517.1
N/A
1535.8
N/A
1554.6
N/A
1573.3
fIGURE 8: Resistance vs Temperature
©Copyright 2012 Dwyer Instruments, Inc.
Printed in U.S.A. 7/12
DWYER INSTRUMENTS, INC.
p.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
phone: 219/879-8000
fax: 219/872-9057
FR# 06-443800-10 Rev. 1
www.dwyer-inst.com
e-mail: [email protected]
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