SENVA HT1W Select Room RH and RH-T Transmitters Installation Guide

SENVA HT1W Select Room RH and RH-T Transmitters Installation Guide

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 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.

1. Wire sensor as shown

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

3. Set DIP switch positions on (front of device) to accommodate your application. DIP switch 2 only applies to units with transmitter temperature output

4. Apply power to

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.

DIMENSIONS

FEATURE – LID LOCKS

The HT1W comes standard with locks to keep the lid from being removed, to stop unwanted tampering. There is a Lock located at all 4 lid snaps

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
2. Compare output of sensor to calibration instrument, and note (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.

TROUBLESHOOTING

Temp or RH reading error

| Verify control panel software is configured for 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 / T sensing element is inserted properly
Install insulation foam gasket provided to pre- vent thermal conduction from inside wall.
Perform calibration only if necessary.

SPECIFICATIONS

Outputs
RH and Temperature (option)| 3-wire 0-5V/10V(4), 3-wire or 2-wire 4-20mA (Selectable)
Output scaling
RH| 0-100%RH
Temperature| 50-95oF (10-35oC) or 32-122oF (0-50oC)

(Selectable)

Thermistor/RTD options| Yes, see ordering table in catalog
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 (3)

| 41 to 140oF (5 to 60oC )@ 20% to 80% RH
Temperature Transmitter
Accuracy| 2% RH models, <±0.25oC
3% RH models, <±0.3oC
Resolution| 0.01oC
Repeatability| 0.04oC
Response time (2)| 2s
Output update rate| 0.5s
Element Operating range| -40 to 140oF (-40 to 60oC)
Environmental
Enclosure Rating| IP20/NEMA 1
Unit Temp Rating| -40oF to 158oF (-40 to 70oC)
Compliance
Agency| CE, RoHS

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

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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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