ROTRONIC HC2 - Manual (Page 26)

E-M-HC2 Probes-V1_26
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroClip 2 (HC2) Humidity Temperature
Probes: User Guide
Instruction Manual
Document Type
Page 26 of 31
Document title
© 2009-2013; Rotronic AG E-M-HC2 Probes-V1_26
10 Technical data
10.1 Specifications
General
Device type Humidity temperature probe
Mechanical configuration See models
Power supply and connections
Supply voltage (VDD) 3.3 … 5 VDC ± 0%
Recommended supply voltage 3.3 VDC
Supply voltage during factory
tests and adjustment
3.3 VDC
Supply voltage stability / ripple See System Accuracy, effect of VDD
Nominal current consumption < 4.5 mA at VDD = 3.3…5 VDC
Maximum start-up current unlimited < 50mA during 2µs
Minimum start-up current 8 mA during 2ms and 5 mA during 2s
Maximum current spike during
operation
1 mA during maximum 2µs
Polarity protection Mechanical only (keyed connector)
Humidity measurement
Sensor ROTRONIC Hygromer ® IN1
Measuring range 0…100 %RH
Measurement accuracy at 23 °C
with 3.3 VDC supply voltage ±0.8 %RH (w. standard adjustment profile)
±1.0 %RH for models HC2-C04 and HC2-C05 (see also §10.3)
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
Sensor Pt100 RTD, IEC 751 class A
Measuring range -100…200 °C (see also environmental limits)
Measurement accuracy at 23 °C
with3.3 VDC supply voltage ±0.1 °C
±0.3 °C for models HC2-C04 and HC2-C05 (see also §10.3)
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
Psychrometric calculations Dew or frost point (user configurable)
Start-up time and data refresh rate
Start-up time 1.5s (typical)
Data refresh rate 1.0s (typical) – when not calculating any parameter