CALIBRATION
Senva RH sensors are factory calibrated to NIST traceable
standards. No eld calibration is necessary or recommended.
However, to facilitate compliance with commissioning
requirements eld calibration osets are allowed.
1. Locate calibration instrument and sensor in close proximity
to each other in a controlled environment free of drafts, people,
and equipment to reduce inuence on RH and temperature.
2. Allow both readings to stabilize (10-30 minutes). Compare
reading of sensor to calibration instrument, and calculate
dierence.
3. Refer to OPERATION section to change osets as needed.
Setting an oset of zero restores factory calibration.
SPECIFICATIONS
TROUBLESHOOTING
Power supply 3-wire voltage mode (0-5V/10V)
2-wire current mode (4-20mA)
12-30VDC/24VAC (1), 15mA max.
12-30VDC, 30mA max.
Outputs RH and Temperature (option) 3-wire 0-5V/10V(4) or 2-wire 4-20mA
Output scaling RH 0-100%RH
Temp. transmitter (jumper selectable) 32~122oF (0~50oC) or -40~140 oF (-40~60oC)
Thermistor/RTD options See ordering table
Media lter PBT with water vapor-permeable membrane
Relative Humidity
Accuracy 2% models: ±2% over 10 to 90% range
3% models: ±3% over 20 to 80% range
Resolution 0.05%RH
Hysteresis ±1%RH
Non-linearity Factory linearized <1%RH
Temperature coecient Fully compensated by on-board sensor
Response time (2) 30s
Output update rate 2s
Operating range 0 to 100%RH (non-condensing)
Long term drift <0.5%RH per year
Operating conditions (3) -4 to 140oF (-20 to 60oC) @ RH >90%
-4 to 158oF (-20 to 70oC) @ RH = 50%
Temperature (Transmitter)
Accuracy (-20 to 70oC range) 2% models: < ±1oC; 0.5oC typ@25oC
3% models: < ±2oC; 0.5oC typ@25oC
Resolution 0.01oC
Repeatability ± 0.1oC
Response time (2) 30s
Output update rate 2s
Operating range -40 to 158oF (-40 to 70oC)
Enclosure Materials ABS/Polycarbonate
Dimensions 4.0”h x 4.4”w x 2.1”d (+6.8” probe)
(1) One side of transformer secondary is connected to signal common. Dedicated transformer is recommended.
(2) Time for reaching 63% of reading at 25oC and 1 m/s airow.
(3) Long term exposures to conditions outside normal range or high humidity may temporarily oset the RH reading (+3%RH after 60 hours).
(4) 15-30VDC/24VAC power supply voltage required for 10 volt output.
Symptom Solution
No output Check wiring. Ensure power
supply meets requirements.
Temp or RH reading
error
Verify control panel software is
congured for correct output
scaling.
Verify accuracy of test instrument.
Observe installation and
calibration guidelines.
Verify unit is securely installed on
duct without excessive air leakage.
Oset calibration only if necessary.
Sensor damage,
contamination, or
long-term drift
Replace sensor element. Consult
factory for ordering information.
Revised 3/21/2017 Document #152-0080-0B
