COMPTUS A70H-HTP Atmospheric Temperature Sensors Instruction Manual

: June 12, 2024
: COMPTUS

COMPTUS A70H-HTP Atmospheric Temperature Sensors

$COMPTUS-A70H-HTP-Atmospheric-Temperature-Sensors $2$$

Product Information: A70H-HTP Atmospheric Temperature, Humidity, and

Pressure Sensor

The A70H-HTP is an advanced atmospheric sensor designed to measure temperature, humidity, and pressure. It is a high sensitivity sensor enclosed in a single IP65/NEMA4 UV protected casing. The sensor is available with a radiation shield made of ABS plastic and stainless steel mounting hardware, providing additional protection. A70H-T & A70H-T-S
The A70H-T is a high sensitivity atmospheric temperature sensor. The sensor is in a single IP65/NEMA4 UV protected casing. The available radiation shield is ABS plastic with stainless steel mounting hardware.

Features

High sensitivity atmospheric sensor
Measures temperature, humidity, and pressure
Comes standard as A70H-HTP Sensor
Available with Solar Radiation Shield (A70H-HTP-S)
Available with Solar Radiation Shield (A70H-HT-S)
Comes Standard as A70H-HT Sensor Only

Applications

Building Automation and Controls
Environmental Monitoring

Specifications

Temperature Range: -40°C to +85°C
Humidity Range: 0-100% R.H.
Pressure Range: 0-100 kPa
Humidity Resolution: 0.5% R.H.
Power Supply: 12-24 VDC
Range: Humidity – 0-100% R.H.
Temperature – -40ºC to 60ºC
Resolution: Humidity – 0.5% R.H.
Temperature – 0.1ºC
Accuracy: Humidity – ±3% R.H.
Temperature – ±0.5ºC
Electrical: Power Supply – 12-24 VDC
Output Signal – 4-20 mA; 0-10V, RS485, I²C, SDI-12
Current Consumption – <20mA
Operating Temperature: -40ºC to 60ºC
Ingress Protection: IP65/NEMA4
Storage Conditions: 10ºC to 60ºC @ 20% to 90% R.H.
Weight: 120g / 4.2 oz (With Shield, 730g / 1.6 lbs)
Materials: ABS, Aluminum, Stainless Steel
Radiaiton Shield Dimensions: 7”D x 12”H

Product Usage Instructions

Ensure the A70H-HTP Atmospheric Temperature, Humidity, and Pressure Sensor is properly installed in the desired location.
Connect the power supply (12-24 VDC) to the sensor.
Make sure the sensor is securely fastened to its mounting hardware.
If using the Solar Radiation Shield (A70H-HTP-S), attach it to the sensor for additional protection against solar radiation.
Once the sensor is powered and mounted, it will start measuring atmospheric temperature, humidity, and pressure automatically.
To retrieve the measured data, refer to the product’s documentation or contact the manufacturer for guidance.
Regularly maintain and clean the sensor to ensure accurate readings and optimal performance.

INSTALLATION

Install the product in a stable environment, away from artificial heating and cooling devices and avoiding direct sunlight if possible. Use the supplied U-bolts to attach the angled mount to a vertical pipe or stan-chion that is approximately 2” in diameter. The Comptus logo should be angled towards the ground with the mounting plane for the radiation shield horizontal above the U-bolts. The angled mount can also be directly attached to a vertical face with screws or bolts.
Slide the free end of the sensor probe into the large cable gland on the bottom of the radiation shield until the sensor probe is one third to one half of the way into the radiation shield. Stop before you get to the hex of the gland nut that holds the black cable. Tighten down the large cable gland on the bottom of the radia-tion shield to lock the sensor probe in place.
Remove the cable ties from the coiled black cable and slide the free end (with wire leads) of the cable through the large round hole in the mounting plane. Remove the three wing nuts from the radiation shield and feed the black cable down until you can mount the three studs through the holes on the mounting plane. Attach in place with the wing nuts from the underside of the mounting plane.

ELECTRICAL CONNECTIONS

OUTPUT CHARACTERISTICS

Current (4-20mA)
Temperature(˚C) = ((I-4)/16 * 100) – 40 where I = output current in mA.
RS485 Communications Protocol (MODBUS-RTU)
Communication parameters: Baud rate: 9600;
Data bits:8; Stop bit:1;
Parity: none
Slave address: factory default is FFH (set according to the need, 00H to FFH) The 03H Function Code Example: Read the Atmospheric Temperature Host Scan Order (slave address: 0xFF)
FF 03 00 00 00 01 91D4
Slave Response FF 03 02 19AD 5BBD
Temperature: (19AD)H = (6573)D = (6573/100)-40 = 25.73˚C
The 10H Function Code Example: Modify the slave address (fixed command, ensure that no other devices are on the bus)
Host Scan Order (Changed to 33H): 00 10 00 01 00 01 02 00 33 EA04
Slave Response 00 10 00 01 00 01 51D8
The 03H Function code Example: Read the Slave Address (fixed command, ensure that no other devices are on the bus)
Host Scan Order: 00 03 00 01 00 01 D41B
Slave Response: 00 03 02 00 FF C5C4

Note:

All underlined is fixed bit;
The last two bytes is CRC check command

If the transmission distance is over 100m please add a 120-ohm termination resistor on the front and back end of the bus interface respectively.

A70H-HT & A70H-HT-S

The A70H-HT is a high sensitivity atmospheric humidity and temperature sensor. The sensor is in a single IP65/NEMA4 UV protected casing. The available radiation shield is ABS plastic with stainless steel mounting hardware.

FEATURES

Available with Solar Radiation Shield (A70H-HT-S)
Comes Standard as A70H-HT Sensor Only

APPLICATIONS

Building Automation and Controls
Environmental Monitoring

SPECIFICATIONS

Range: Humidity – 0-100% R.H.
- Temperature – -40ºC to 60ºC
Resolution: Humidity – 0.5% R.H.
- Temperature – 0.1ºC
- Accuracy: Humidity – ±3% R.H.
- Temperature – ±0.5ºC
Electrical: Power Supply – 12-24 VDC
- Output Signal – 4-20 mA; 0-10V, RS485, I²C, SDI-12
- Current Consumption – <20mA
Operating Temperature: -40ºC to 60ºC
Ingress Protection: IP65/NEMA4
Storage Conditions: 10ºC to 60ºC @ 20% to 90% R.H.
Weight: 120g / 4.2 oz (With Shield, 730g / 1.6 lbs)
Materials: ABS, Aluminum, Stainless Steel
Radiaiton Shield Dimensions: 7”D x 12”H

INSTALLATION

Install the product in a stable environment, away from artificial heating and cooling devices and avoiding direct sunlight if possible. Use the supplied U-bolts to attach the angled mount to a vertical pipe or stan-chion that is approximately 2” in diameter. The Comptus logo should be angled towards the ground with the mounting plane for the radiation shield horizontal above the U-bolts. The angled mount can also be directly attached to a vertical face with screws or bolts.
Slide the free end of the sensor probe into the large cable gland on the bottom of the radiation shield until the sensor probe is one third to one half of the way into the radiation shield. Stop before you get to the hex of the gland nut that holds the black cable. Tighten down the large cable gland on the bottom of the radia-tion shield to lock the sensor probe in place.
Remove the cable ties from the coiled black cable and slide the free end (with wire leads) of the cable through the large round hole in the mounting plane. Remove the three wing nuts from the radiation shield and feed the black cable down until you can mount the three studs through the holes on the mounting plane. Attach in place with the wing nuts from the underside of the mounting plane.

ELECTRICAL CONNECTIONS

OUTPUT CHARACTERISTICS

Current (4-20mA)
T Temperature(˚C) = ((I-4)/16 * 100) – 40 where I = output current in mA.
H Humidity(%) = (I-4)/16 * 100% where I = output current in mA.
RS485 Communications Protocol (MODBUS-RTU)
If the transmission distance is over 100m please add a 120-ohm termination resistor on the front and back end of the bus interface respectively.

Communication parameters

Baud rate: 9600;
Data bits:8; Stop
bit:1;
Slave address: factory default is FFH (set according to the need, 00H to FFH) The 03H
Function Code Example: Read the Atmospheric Temperature & Humidity Host Scan Order (slave address: 0xFF)
FF 03 00 00 00 02 D1D5
Slave Response
FF 03 04 19AD 1BE4 79FA
Temperature: (19AD)H = (6573)D = (6573/100)-40 = 25.73˚C
Humidity: (1BE4)H = (7140)D = 7140/100 = 71.40%
The 10H Function Code Example: Modify the slave address (fixed command, ensure that no other devices are on the bus)
Host Scan Order (Changed to 33H): 00 10 00 01 00 01 02 00 33 EA04
Slave Response: 00 10 00 01 00 01 51D8
The 03H Function code Example: Read the Slave Address (fixed command, ensure that no other devices are on the bus)
Host Scan Order: 00 03 00 01 00 01 D41B
Slave Response: 00 03 02 00 FF C5C4

Note:

All underlined is fixed bit;
The last two bytes is CRC check command

A70H-HTP & A70H-HTP-S

The A70H-HTP-S is a high sensitivity atmospheric humidity, temperature and barometric pressure sensor with radiation shield. The sensors are in a single IP65/NEMA4 UV protected casing. The available radiation shield is ABS plastic with stainless steel mounting hardware. The mounting bracket is supplied with two 2-1/4” U-bolts for mounting to a mast. The 4-wire sensor cable is 10’ (3m) long. Connections are for V+, V-, data A and data B.

FEATURES

Available with Solar Radiation Shield (A70H-HTP-S)
Comes Standard as A70H-HTP Sensor Only

APPLICATIONS

Building Automation and Controls
Environmental Monitoring

SPECIFICATIONS

Range: Humidity – 0-100% R.H.
- Temperature – -40ºC to 60ºC
- Pressure – 10-110kPa (100-1100 mbar)
Resolution: Humidity – 0.5% R.H.
- Temperature – 0.1ºC
- Pressure – 0.1 mbar
Accuracy: Humidity – ±3% R.H.
- Temperature – ±0.5ºC
- Pressure – ±1 mbar
Electrical: Power Supply – 12-24 VDC
Output Signal – MODBUS RTU – RS485
Current Consumption – <20mA
Operating Temperature: -40ºC to 60ºC
Ingress Protection: IP65/NEMA4
Storage Conditions: 10ºC to 60ºC @ 20% to 90% R.H.
Weight: 120g / 4.2 oz (With Shield, 730g / 1.6 lbs)
Materials: ABS, Aluminum, Stainless Steel
Radiaiton Shield Dimensions: 7”D x 12”H

INSTALLATION

Install the product in a stable environment, away from artificial heating and cooling devices and avoiding direct sunlight if possible. Use the supplied U-bolts to attach the angled mount to a vertical pipe or stan-chion that is approximately 2” in diameter. The Comptus logo should be angled towards the ground with the mounting plane for the radiation shield horizontal above the U-bolts. The angled mount can also be directly attached to a vertical face with screws or bolts.
Slide the free end of the sensor probe into the large cable gland on the bottom of the radiation shield until the sensor probe is one third to one half of the way into the radiation shield. Stop before you get to the hex of the gland nut that holds the black cable. Tighten down the large cable gland on the bottom of the radia-tion shield to lock the sensor probe in place.
Remove the cable ties from the coiled black cable and slide the free end (with wire leads) of the cable through the large round hole in the mounting plane. Remove the three wing nuts from the radiation shield and feed the black cable down until you can mount the three studs through the holes on the mounting plane. Attach in place with the wing nuts from the underside of the mounting plane

ELECTRICAL CONNECTIONS:

CABLE: RS485 Output
RED: V+
BLACK: V-
YELLOW: RS485 DA+
BLUE: RS485 DB-

OUTPUT CHARACTERISTICS

RS485 Communications Protocol (MODBUS-RTU)
If the transmission distance is over 100m please add a 120-ohm termination resistor on the front and back end of the bus interface respectively.
Communication parameters: Baud rate: 9600; Data bits:8; Stop bit:1; Parity: none
Slave address: factory default is FFH (set according to the need, 00H to FFH)
The 03H Function Code Example: Read the Atmospheric Temperature, Humidity and Barometric Pressure Host Scan Order (slave address: 0xFF)
FF 03 00 00 00 03 1015
Slave Response
FF 03 06 19AD 1BE4 2715 5A2C
Temperature: (19AD)H = (6573)D = (6573/100)-40 = 25.73˚C
Humidity: (1BE4)H = (7140)D = (7140/100) = 71.40%
Pressure: (2715)H = (10005)D = (10005/100) = 100.05 kpa = 1000.5 mbar
The 10H Function Code Example: Modify the slave address (fixed command, ensure that no other devices are on the bus)
Host Scan Order (Changed to 33H): 00 10 00 01 00 01 02 00 33 EA04
Slave Response 00 10 00 01 00 01 51D8
The 03H Function code Example: Read the Slave Address (fixed command, ensure that no other devices are on the bus)
Host Scan Order: 00 03 00 01 00 01 D41B
Slave Response: 00 03 02 00 FF C5C4

Note:

All underlined is fixed bit;
The last two bytes is CRC check command
Register Map: 40001 Temperature ˚C (value/100 – 40) i.e. 5923/100 – 40 = 19.23˚C
- 40002 Humidity % (value/100) i.e. 6055/100 = 60.55%
- 40003 Barometric pressure mbar (value/10) i.e. 9985/10 = 998.5 mbar

Specifications subject to change without notice Installation Questions and Troubleshooting