DLP-RF2-SENS DLP Design Inc, DLP-RF2-SENS Datasheet - Page 2

• Manufacturer Part Number: DLP-RF2-SENS
• Description: Industrial Humidity Sensors TEMP AND HUMIDITY SENSOR FOR RF2 MOD.
• Manufacturer: DLP Design Inc

Specifications of DLP-RF2-SENS

• Rh Range: 0 % to 100 %
• Rh Accuracy: +/- 3 % to +/- 5 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Door Switch
Wiring Terminal CN1 is provided on the DLP-RF2SENS for connection to a set of normally open or
normally closed door switch contacts. When the door switch contacts are opened or closed, the
DLP-RF2 is brought out of sleep mode and a broadcast packet (Destination ID=0) is transmitted. The
system controller transceiver (DLP-RF1 or DLP-RF2) responds to this packet by requesting the battery
voltage, and/or temperature and humidity data. The system controller then has the option of instructing
the DLP-RF2SENS and DLP-RF2 board set to return immediately to sleep.
Temperature & Humidity Sensor
The sensor used on the DLP-RF2SENS module is read via digital I/O lines from the DLP-RF2. The
interface employed by the sensor is purely digital, so analog measurements are not required for the
reading. The sensor is calibrated at the factory, and calibration constants are permanently stored within
the sensor itself.
When not being read, the sensor enters a low-power mode in which it draws one microamp or less.
Published specifications for the sensor are as follows:
Battery Power Measurement
The battery power measurement system works by placing a light load (approximately 10 milliamps) on
the two AAA batteries and then measuring the battery voltage using the A/D converter in the DLP-RF2.
A 2.1-volt voltage regulator is used as a voltage reference to set the maximum voltage for the A/D
converter in the DLP-RF2. The connection from the batteries to the A/D converter is made via a voltage
divider so that the battery voltage (~3.2V max) is within the range of the 2.1-volt reference after being
divided by two.
A MOSFET switch is used to disable the battery power measurement circuitry when not in use such that
no load is placed on the batteries.
Rev 1.0 (March 2005)
Range
Accuracy
Resolution
Repeatability
Response Time
Range
Accuracy
Resolution
Repeatability
Response Time
Temperature
Humidity
0-100%RH
±3%RH (20 to 80%RH), ±5%RH (0 to 100%RH)
0.03%RH
±0.1%RH
4 Sec.
-40 to 123.8°C
±2.0°C (-30 to 80°C)
0.01°C
±0.1°C
5-30 Sec.
°C
2
-40 to 254.9°F
±3.6°F (-22°F to 176°F)
0.02°F
±0.2°F
5-30 Sec.
°F
DLP-RF2SENS DLP Design, Inc.