ROTRONIC XB OEM - Manual (Page 22)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 22 of 27
© 2008; Rotronic AG E-M-XB-V1_10
10 Technical data
10.1 Specifications
General
XB2 XB3
Device type Humidity temperature transmitter
Circuit type 2-wire, loop powered 3-wire
Power supply and connections
XB2 XB3
Supply voltage (VDD)
10…28VDC
V min = 10 V + (0.02 x Load*) *Load
resistance in ohms.
15…40 VDC or
12…28 VAC
Nominal current consumption 2 x 20 mA < 50 mA
Electrical connections Terminal block
Polarity protection Protective diode on V+
Humidity measurement
XB2 XB3
Sensor ROTRONIC Hygromer ® IN1
Measuring range 0…100 %RH
Measurement accuracy at 23 °C ±1.0 %RH
Repeatability 0.3 %RH
Long term stability < 1 %RH / year
Sensor time constant Typical 10 sec, 63% of a 35 to 80 %RH step change (1m/sec air flow at sensor)
Temperature measurement
XB2 XB3
Sensor Pt100 RTD, IEC 751 1/3 class B
Measuring range -100…200 °C (see also environmental limits)
Measurement accuracy at 23 °C ±0.2 °C
Repeatability 0.05°C
Long term stability
< 0.1°C / year
Sensor time constant Typical 4 sec, 63% of a step change (1m/sec air flow at sensor)
Calculated parameters
XB2 XB3
Psychrometric calculations Dew or frost point (user configurable option)
Start-up time and data refresh rate
XB2 XB3
Start-up time 3.4s (typical) 1.9s (typical)
Data refresh rate 3.4s (typical) 1.7s (typical)