ROTRONIC HF4 - Manual (Page 26)

E-M-HF4-V1_22
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF4 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 26 of 29
Document title
© 2009-2011; Rotronic AG E-M-HF4-V1_22
Start-up time and data refresh rate HF42 HF43 HF45
Start-up time 3.4s (typical) 1.9s (typical) 1.9s (typical)
Data refresh rate 3.4s (typical) 1.7s (typical) 1.7s (typical)
Configurable analog outputs HF42 HF43
Output 1 Can be made to correspond to any parameter
Factory default parameter Relative humidity or dew / frost point
Factory default scale As per ordering code
Output 2 Can be made to correspond to any parameter
Factory default parameter Temperature
Factory default scale As per ordering code
Output 1 and Output 2
Signal type 4…20 mA
0…20 mA
4… 20 mA
0… 1 V
0… 5 V
0… 10 V
(user configurable)
User configurable scaling limits - 999.99 … +9999.99 engineering units
Maximum offset at bottom of
signal range
no offset
0…1V signal range : 3 mV
0…5 V signal range : 50mV
0…10 V signal range : 90mV
0…20 mA signal range : 4uA
4…20 mA signal range : no offset
Short circuit tolerant Yes
Maximum external load 500 Ω 500 Ω (current output)
Minimum external load 0 Ω
1 kΩ (0…1 V output)
5 kΩ (0…5 V output)
10 kΩ (0…10 V output)
0 Ω (current output)
Digital interface HF45
Interface type RS-485, USB and RS-485 or Ethernet (TCP/IP) wired or wireless and RS-485
Service connector HF42 HF43 HF45
Interface type UART(Universal Asynchronous Receiver Transmitter)
Maximum service cable length 5 m (16.4 ft)
General specifications HF42 HF43 HF45
Optional display
LC, 1 or 2 decimals
resolution, no backlight,
trend and alarm
indication
LC, 1 or 2 decimals resolution, backlight, trend and
alarm indication
Probe material Polycarbonate
Probe dust filter material Polyethylene
Housing material ABS
Housing protection grade IP 65 (except HF45 – USB or Ethernet)
Physical dimensions See Models
Weight 250 g (8.8 oz) 250 g (8.8 oz)