senva HT0D Economy Series Duct RH Transmitters Instruction Manual
- June 1, 2024
- SENVA
Table of Contents
senva HT0D Economy Series Duct RH Transmitters
Specifications
- Power supply: 12-30VDC/24VAC
- Outputs: 0-5V, 0-10V, or 3-wire 4-20mA signal
- Output scaling: Thermistor/RTD options
- Relative Humidity Accuracy: RH
- Environmental RH Accuracy Resolution: Hysteresis Repeatability Non-linearity
- Temperature coefficient Response time (2) Output update rate Operating range Long term drift Element Recommended Operating conditions (3)
- Enclosure Rating Unit Temp Rating
Product Usage Instructions
Installation
- Drill a 3/4 hole in duct.
- Install sensor using gasket and screws provided. Ensure the pickup tube allows adequate airflow regardless of direction.
- If using a conduit adapter, replace the factory-installed cable gland.
- Wire sensor as shown:
- 3-wire: V/I GND PWR + _
- 2-wire: V/I GND PWR + _
- Apply power to the sensor.
- Tighten the cable gland firmly around wires. Seal wire entry if using a conduit adapter to prevent conduit air from affecting sensor readings.
- Close lid and tighten screw securely to prevent moisture ingress.
Calibration
Senva RH sensors are factory calibrated. No field calibration is necessary or recommended.
Troubleshooting
| Symptom | Solution |
|---|---|
| No output |
- Check wiring and power supply.
- Verify control panel software configuration.
- Check accuracy of test instrument.
RH reading error|
- Ensure unit is away from hot/cold sources.
- Install insulation foam gasket to prevent thermal
conduction.
FAQ
- Q: Is this product suitable for critical applications?
- A: Senva products are not designed for life or safety applications and should not be used in critical applications like nuclear facilities or life support systems.
- Q: How to verify the accuracy of the sensor?
- A: You can verify the accuracy by checking the wiring, power supply, and ensuring the control panel software is configured correctly.
- Q: What should I do if there is no output from the sensor?
- A: Check the wiring, power supply, and ensure the control panel software is configured for the correct output scaling.
IMPORTANT WARNINGS
- Only qualified trade installers should install this product
- This product is not intended for life-safety applications
- Do not install in hazardous or classified locations
- The installer is responsible for all applicable codes
- De-energize power supply prior to installation or service
PRODUCT APPLICATION LIMITATION:
Senva products are not designed for life or safety applications. Senva products are not intended for use in critical applications such as nuclear facilities, human implantable device or life support. Senva is not liable, in whole or in part, for any claims or damages arising from such uses.
INSTALLATION
- Drill a 3/4” hole in duct. Install sensor using gasket and screws provided. The pickup tube will ensure adequate air flow regardless of air flow direction.
- If installing with a conduit adapter, remove and replace the factory-installed cable gland.
- Wire sensor as shown.
- Apply power to sensor.
- Tighten cable gland firmly around wires. If installing with a conduit adapter, seal wire entry to prevent conduit air from affecting sensor readings or operation.
- Close lid and tighten screw. Cover must be securely installed to prevent moisture from entering enclosure
DIMENSIONS
CALIBRATION
Senva RH sensors are factory-calibrated. No field calibration is necessary or recommended
TROUBLESHOOTING
| Symptom | Solution |
|---|---|
| No output | Check wiring. Ensure power supply meets requirements. |
Temp or RH reading error
| Verify control panel software is configured for correct output scaling.
Verify accuracy of test instrument. Observe installation guidelines
Verify unit is located away from sources of hot/ cold.
Install insulation foam gasket provided to prevent thermal conduction from
inside wall.
SPECIFICATIONS
- One side of the transformer secondary is connected to the signal common. The dedicated transformer is recommended. No VAC power connection on the two wire devices.
- Time for reaching 63% of reading at 25oC and 1 m/s airflow.
- Long-term exposures to conditions outside the normal range or high humidity may temporarily offset the RH reading (+3%RH after 60 hours.)