| Вид документа | Бюлетень виробу |
|---|---|
| Виробник | JCI |
| Код документа | system-350-set189a-series-temperature-sensors |
| Група обладнання | System 350 Series Temperature Sensors |
| Сторінок | 8 |
| Мова документа | англійська |
| Розмір файлу | 0.1 МБ |
О чём документ
Технический бюллетень Johnson Controls по датчикам температуры SET189A Series для систем управления System 350. Описывает принцип работы кремниевого PTC-датчика, монтаж (внутренний, наружный, канальный, гильзовый, усреднение, последовательно-параллельная схема), подключение и проверку. Пригодится при подборе, монтаже и поиске неисправностей датчика.
Ключевые характеристики
| Параметр | Значение |
|---|---|
| Тип датчика | PTC кремниевый (сопротивление растёт с температурой) |
| Диапазон измерения | −40…+250 °F (−40…+121 °C) |
| Опорное сопротивление | 1035 Ом @ 77 °F (25 °C) |
| Точность | 1F° @ 77 °F (0,56 °C @ 25 °C) |
| Питание | от контроллера System 350 |
| Конструкция зонда | медная гильза с лужёным покрытием |
| Изоляция проводов | высокотемпературная силиконовая резина |
| Провод | 22 AWG |
| Рабочая среда | −40…+250 °F (−40…+121 °C); 0…95 % RH без конденсации |
| Условия хранения | −50…+266 °F (−46…+130 °C); 0…95 % RH без конденсации |
| Масса | 0,4 унции (11 г) |
| Макс. удаление от контроллера | 800 футов |
| Варианты по длине проводов | SET189A-600R — 9 дюймов (229 мм); SET189A-607R — 6 футов (1,8 м); SET189A-605R — 10 футов (3 м); SET189A-606R — 15 футов (4,6 м) |
Что внутри документа
- Обзор и преимущества: варианты длины проводов, монтажная фурнитура, точность 1F°
- Применение: indoor, outdoor, duct, duct averaging, immersion, series parallel; схемы усреднения на 4, 9, 16 датчиков
- Выбор места монтажа: избегать вибраций, солнца, влаги; требования к длине проводов (таблица 1)
- Монтаж в гильзу WEL11A-601R (отверстие 1/2 in., 14 NPT) и в корпус PVC
- Прокладка и подключение проводов: экранирование при длинах свыше 50 футов
- Поиск неисправностей: проверка сопротивления по графику «температура — сопротивление»
- Процедура ввода в эксплуатацию: проверка минимум трёх рабочих циклов
- Таблицы заказа: датчики (таблица 2) и принадлежности по применению (таблица 3)
- Спецификации
Быстрый старт
- Выберите место монтажа с учётом рекомендаций (нет вибраций, прямого солнца, скопления влаги; достаточное смешивание воздуха).
- Для погружного монтажа установите гильзу WEL11A-601R с теплопередающей пастой в отверстие 1/2 in., 14 NPT; наденьте пружину и втулку на провод, вставьте датчик (минимум 1/2 втулки в гильзе) и затяните винты.
- Для наружного монтажа используйте комплект SET189A-608R (датчик, корпус PVC, клеммные гайки); заглушите отверстие кабелепровода пеной; при необходимости — солнцезащитный экран SHL10A-603R.
- Подключите провода к контроллеру System 350, отключив питание; используйте только медные проводники; при длинах свыше 50 футов — экранированный кабель (экран изолировать и подключить на клемму «COM» контроллера).
- Проверьте монтаж и соединения по проекту, введите систему в работу и понаблюдайте минимум три полных рабочих цикла.
Частые вопросы
- Какое сопротивление датчик должен показывать при комнатной температуре?
- Опорное сопротивление — 1035 Ом @ 77 °F (25 °C); точное значение при другой температуре — по графику «температура — сопротивление» в документе.
- Какой длины кабель можно использовать?
- До 800 футов при проводе 14 AWG; рекомендуемые длины по сечению: 16 AWG — 500 футов (152 м), 18 AWG — 310 футов (94 м), 20 AWG — 200 футов (60 футов=60 м), 22 AWG — 124 фута (38 м). Погрешность от сопротивления проводов — не более 1F° (0,5 °C) на максимальных длинах.
- Можно ли починить или откалибровать датчик в поле?
- Нет, полевой ремонт и калибровка не допускаются. Если измеренное сопротивление существенно расходится с графиком, датчик подлежит замене.
- Как усреднить температуру по каналу?
- Несколько датчиков соединяются последовательно-параллельно; это возможно только с 4, 9, 16 и т. д. датчиками. Схема подключения приведена в документе; дополнительно нужен коннектор ADP11A-600R.
- Какие принадлежности нужны для наружной установки?
- Комплект SET189A-608R (датчик SET189A-600R, корпус PVC, клеммные гайки), при необходимости коннектор ADP11A-600R и солнцезащитный экран SHL10A-603R или корпус TE-6001-2.
- С чем совместим датчик SET189A?
- Датчики предназначены только для работы с контроллерами System 350 и питаются от контроллера.
Текст документа
System 350 Product Guide 930
Sensors and Accessories - Discontinued
Product/Technical Bulletin SET189A
Issue Date 0893
System 350™
SET189A Series Temperature Sensors
The SET189A Series of temperature sensing
products is designed to measure temperature in
System 350 Control applications. An outdoor air
sensor kit is available, as well as several accessories,
which allow easy tailoring of the temperature sensor to
a variety of mounting configurations. Applications
include indoor, outdoor, duct, immersion well,
averaging, and series parallel sensing.
Figure 1: The SET189A Series Temperature Sensors
Features and Benefits
Variety of Lead Lengths Encompasses most application requirements
Assortment of Mounting Allows user to customize every installation
Hardware Available
Sensor can be Mounted up to Increases versatility; tailors to a variety of system
800 ft. Away from the Control configurations
Accuracy of 1F° @ 77°F Provides suitable performance for a wide variety of
(0.56°C @ 25°C) System 350 applications
© 1993 Johnson Controls, Inc. 1
Part 24-7664-133, Rev. A - Discontinued
CPD No. 996-528-1
P roduct Overview O peration
IMPORTANT: SET189A Series Sensors are
designed for use only with operating
controls. Where an operating control
Part Number Lead Size failure would result in personal injury
SET189A-600R 9 in. (229 mm) and/or loss of property, it is the
SET189A-607R 6 ft (1.8 m) responsibility of the installer to add
SET189A-605R 10 ft (3 m) devices (safety, limit controls) or
SET189A-606R 15 ft (4.6 m)
systems (alarm, supervisory) that
protect against or warn of control
failure.
Figure 2: SET189A Sensors Available
The SET189A Sensor is a PTC (positive temperature
coefficient) silicon sensor. The sensor’s resistance
increases with a corresponding increase in
temperature. The sensor has a reference resistance
1.63
of 1035 ohms at 77°F (25°C); see Figure 7.
42
SET189A-600R
Silicon Sensor A pplication Information
The SET189A Series was designed to accommodate
4.47
113.5
a variety of temperature sensing applications including
the following:
Wire Nuts • indoor • duct averaging
PVC Enclosure • outdoor • series parallel
Figure 3: SET189A-608R Kit (in./mm) Items Included • duct • immersion
See Tables 2 and 3 for specific for a list of items
needed in each type of application.
When averaging is required, multiple sensors can be
0.5/13 EMT connected in a series parallel arrangement. This can
Conduit only be accomplished with 4, 9, 16, etc. sensors.
Adapter Wiring hookups for averaging are shown in Figure 5.
ADP11A-600R
Sensor Sensor Sensor
1.75 4.75 dia.
9.1 44 119 0.36
229 9.3
0.88
Sun Shield 23 Sensor Sensor Sensor
SHL10A-603R Immersion Well
4.3 WEL11A-601R
110
Figure 4: Additional Items Available (in./mm) Sensor Sensor Sensor
To Controller
Figure 5: Nine Sensors Wired in a Series Parallel
Arrangement
2 Sensors and Accessories—SET189A Product/Technical Bulletin
L ocation Considerations I nstallation and Wiring
To ensure proper operation of the SET189A Series
Sensors, consider the following before mounting: Mounting using Immersion Well
• Mount the sensors in any position. (They are not 1. Select the mounting location in the pipe line;
position sensitive.) a 1/2 in., 14 NPT opening is required.
• Mount sensors in areas where sufficient air mixing 2. Install well WEL11A-601R containing thermal
has occurred. transfer compound. Tighten securely using a
straight-slot screwdriver.
• Avoid areas subject to excessive vibration or 3. Thread the spring, then the bushing onto the
electrical noise. sensor lead. Push both down the lead to the
• Avoid areas where the sensor will be exposed to sensor.
direct sunlight. The north side of a building is 4. Insert sensor, spring, and bushing into well, so
preferred. If this is not possible, install sun shield that at least 1/2 of the bushing is inserted into the
No. SHL10A-603R well (bushing will compress spring).
• Avoid areas where excess moisture could collect 5. Tighten set screws.
on the sensor.
• Keep conductors as short as possible to minimize Mounting using PVC Enclosure
temperature error. Wire resistance will cause a The PVC enclosure can be mounted in a variety of
shift in the nominal value by adding to the sensor ways. When mounting the PVC enclosure, note the
reading. Follow Table 1 values to keep error at Location Considerations to the left and the following:
less than 1F° (4.3Ω)
• To prevent false readings caused by air movement
• Shielded cable is not generally required for sensor through the conduit hole, block the hole (with foam
wiring on runs of less than fifty feet, but is packing or similar material).
recommended for lengths greater than fifty feet.
When using shielded cable, isolate and tape the • If connection to conduit is required, snap the
shield at the sensor. Connect the shield to the conduit adapter into the sensor enclosure and
“COM” sensor terminal on the control. tighten the set screw on the adapter.
Note: At the maximum cable lengths listed in
Table 1, no more than 1F° (0.5C°) error in
the sensed temperature will result due to
wire resistance.
Table 1: Recommended Sensor Cable Lengths
Wire Shielded Cable Length
Gauge Feet Meters
14 AWG 800 244
16 AWG 500 152
18 AWG 310 94
20 AWG 200 60
22 AWG 124 38
Sensors and Accessories—SET189A Product/Technical Bulletin 3
Wiring
T roubleshooting
! WARNING: Disconnect the power supply
before wiring connections are Check Sensor for Proper Resistance.
made to avoid possible 1. Take a temperature reading at the sensor location
electrical shock or damage to (Ts). Be sure to let the thermometer stabilize
equipment. before taking a reading.
See Figure 6 for a typical wiring scheme in a 2. Disconnect the sensor from the control. Using an
System 350 temperature control application. ohmmeter, measure the resistance across the two
sensor leads. Consult the Temperature vs.
Note: Sensor wiring is low voltage and must be Resistance Chart (Figure 7) to verify sensor
installed to conform to the National Electrical conformance.
Code and local regulations. Use copper
conductors only. 3. If the sensor’s actual performance deviates
substantially from that represented on the chart,
the sensor must be replaced.
Sensor
#
0 0
A350 S350 D350 F C
260
121
240
24 110
VAC 220
98.8
200
87.7
180
76.6
160
Temperature
65.5
140
54.4
120
43.3
100
32.2
80
21.1
60
L 10
1 40
L -1.1
2 20
-12.2
Load Load 0
-23.3
-20
-34.4
-40
Figure 6: Temperature Control System Powered 600 800 1000 1200 1400 1600 1800 2000
by an External Class 2 Transformer Resistance in Ohms
Figure 7: Temperature vs. Resistance Chart
C heckout Procedure
for the SET189A Series Sensor
Before applying power, make sure installation and
wiring connections are according to job specifications.
After necessary adjustments and electrical
connections have been made, put the system in
operation and observe at least three complete
operating cycles before leaving the installation.
4 Sensors and Accessories—SET189A Product/Technical Bulletin
R epairs and Replacement
Field repairs or calibration must not be made.
Sensors and replacement controls are available
through local Johnson Controls distributors or branch
offices. To order replacement parts, see Tables 2
and 3.
O rdering Information
Table 2: SET189A Series Silicon Sensors Available
Silicon Sensors Available
SET189A-600R 9 in. (229 mm) Leads
SET189A-607R 6 ft. (1.8 m) Leads
SET189A-605R 10 ft. (3 m) Leads
SET189A-606R 15 ft. (4.6 m) Leads
Table 3: Application Specific Items Needed
Application Recommended Products (in addition to sensor ordered from Table 2)
Indoor T-4000-2644 Cover
TE-6001-4 Mounting Bracket and Wall Plate Adapter
Outdoor SET189A-608R Kit (includes SET189A-600R Sensor, PVC Enclosure, Wire Nuts)
ADP11A-600R 1/2 in. Snap-fit Conduit Connector (box of 10)
SHL10A-603R Metal Sun Shield (optional) or TE-6001-2 Metal Housing
Duct TE-6001-1 Sensor Holder
Duct Averaging Order desired number of SET189A Series Sensors, and see Figure 5 for application example
or Series Parallel ADP11A-600R 1/2 in. (13 mm) Snap-fit Conduit Connector (box of 10)
Immersion WEL11A-601R (includes spring, set screws, bushing)
Sensors and Accessories—SET189A Product/Technical Bulletin 5
Notes
6 Sensors and Accessories—SET189A Product/Technical Bulletin
Notes
Sensors and Accessories—SET189A Product/Technical Bulletin 7
S pecifications
Product SET189A Series Silicon Temperature Sensors
Sensing Range –40 to 250°F (–40 to 121°C)
Power Requirements Supplied by a System 350 Control
Reference Resistance 1035 ohms @ 77°F (25°C)
Accuracy 1F° @ 77°F (0.56C° @ 25°C)
Sensor Construction Probe: Copper Bulb with Tin-plate Coating
Sensor Lead Wire Insulation High-temperature Silicone Rubber
Lead Wiring 22 Gauge Wire
Ambient Operating Conditions –40 to 250°F (–40 to 121°C); 0 to 95% RH, Non-condensing
Ambient Storage Conditions –50 to 266°F (–46 to 130°C); 0 to 95% RH, Non-condensing
Shipping Weight 0.4 oz. (11 g)
Accessories See Tables 2 and 3.
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications,
consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
Controls Group FAN 930
507 E. Michigan Street System 350 Product Guide
P.O. Box 423 Printed in U.S.A
Milwaukee, WI 53201
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