SENVA HT1R Select Series Room RH and RH/T Transmitters Instruction Manual

INSTALLATION INSTRUCTIONS
HT1R Select Series
Room RH & RH/T Transmitters

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

1. IMPORTANT! Locate sensor in an area away from ventilation sources and heat generating equipment and appliances.
   Sensor should be mounted at light switch height in a vertical orientation. Use insulating material behind sensor to ensure reading accuracy.
   NOTE : Do not install sensor in multi-gang electrical boxes with line voltage or other electrical devices.

2. Wire sensor as shown above.

3. Set the slide selector position (on back of device) to accommodate either 2-wire or 3-wire outputs. This selector must be ‘up’ for a voltage output.

4. Set DIP switch positions to accommodate your application.
   DIP switch 2 only applies to units with transmitter temperature output selected.

5. See mounting section.

6. Apply power to sensor.

OPERATION

Press center MENU button to cycle between (1) the sensor readouts, (2) %RH offset, (3) temperature offset (transmitter version only), and (4) ºF/ºC display settings (LCD version only).
The next press will return to the readout menu.
The lower arrow and upper arrow can be used to decrease or increase offset values in 0.1 increments up to ±5 (% or o) or choose between ºC and ºF.
If no LCD is present, the same menu structure applies except the oF/oC setting will not be accessible. A red LED will blink to indicate %RH offset setting and glow solid to indicate temperature offset setting in oF.

TROUBLESHOOTING

correct output scaling.
Verify accuracy of test instrument. Observe installation and calibration guidelines
Verify unit is located away from sources of hot/cold.
Verify RH IT sensing element is inserted properly
Install insulation foam gasket provided to prevent thermal conduction from inside wall.
Perform calibration only if necessary.

MOUNTING

IF MOUNTING INTO A JUNCTION BOX:

1. Remove drywall clamps by turning screws counter clockwise.

IF MOUNTING INTO DRYWALL:

1. Turn both mounting clamps all the way counter clockwise.
2. Insert into drywall cutout.
3. Turn screws clockwise to tighten drywall mounts until tight to wall.

CALIBRATION

Senva RH sensors are factory calibrated to NIST traceable standards. No field calibration is necessary or recommended.
However, to facilitate compliance with job requirements and commissioning procedures, provisions for field calibration are provided:

1. Locate calibration instrument and sensor in close proximity to each other in a controlled environment free of drafts, people, and equipment to reduce influence on RH and temperature.
2. Compare output of sensor to calibration instrument, and note difference. (In 0-10v mode, 1v = 10%RH)
3. Using the buttons on front of unit, adjust offset value for %RH as needed. Factory calibration may be restored by setting offset back to 0.

SPECIFICATIONS

4-20mA (Selectable)
Output scaling| RH| 0-100%RH
Temperature| 50-95°F (10-35°C) or 32-122°F (0-50°C) (selectable)
Thermistor/RTD options| | Yes, see ordering table in catalog
Media filter| | PTFE membrane, IP54 protection
Relative Humidity| Accuracy| 2% models: ±2% max 0 to 100% RH
3% models: ±3% max 0 to 100% RH
Resolution| 0.01 %RH
Hysteresis| ±0.8%RH
Repeatability| 0.08% RH
Non-linearity| Factory linearized <1%RH
Temperature coefficient| Fully compensated by on-board sensor
Response time (2)| 8s
Output update rate| 0.5s
Operating range| 0 to 100%RH (non-condensing)
Long term drift| <0.25%RH per year
Element Recommended Operating conditions ( )| 41 to 140°F (5 to 60°C )@ 20% to 80% RH
Temperature Transmitter| Accuracy| <±1°C; 0.5° C typ @ 25°C 3% models, <±2° C; 0.5° C typ @ 25° C
Resolution| 0.01°C
Repeatability| 0.04°C
Response time (2)| 2s
Output update rate| 0.5s
Element Operating range| -40 to 140°F (-40 to 60°C)
Environmental| Enclosure Rating| IP20/NEMA 1
Unit Temp Rating| -40°F to 158°F (-40 to 70°C)

1. One side of transformer secondary is connected to signal common. Dedicated transformer is recommended.
2. Time for reaching 63% of reading at 25°C and 1 m/s airflow.
3. Long term exposures to conditions outside normal range or high humidity may temporarily offset the RH reading (+3%RH after 60 hours.)
4. 15-30VDC/24VAC power supply voltage required for 10 Volt output. Power consumption 100mA max AC, 50mA max DC

Revised 7/3/2024 Document #152-0071-0G

References

• Senva inc: Gas Sensors, Toxic Sensors, Dry Pressure Sensors, Wet Pressure Sensors, Humidity/Temp Sensors, Current Switches, Current Transducers, Energy Measurement, Relays, Leak Detection, IoT Solutions, Smart Sensors

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