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
Symptom Solution
No output Check wiring. Ensure power
supply meets requirements.
Temp or RH reading error
Verify unit is located out of
direct sunlight.
Verify control panel software
is congured for correct
output scaling.
Verify accuracy of test instru-
ment. Observe installation
and calibration guidelines.
Oset calibration only if
necessary.
Sensor damage,
contamination, or long-term
drift
Replace sensor element.
Consult factory for ordering
information.
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 Sintered stainless steel
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
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 (+2.8” solar shield)
(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.
Revised 3/27/2017 Document #152-0090-0C
