ROTRONIC HF5 - Manual (Page 10)

E-M-HF5-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF5 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 10 of 36
Document title
© 2009-2013; Rotronic AG E-M-HF5-V2_12
PROCESS PROTECTION AND PROTECTION OF OTHER DEVICES
► Fail safe mode Used to specify a "safe" fixed value for humidity and for
temperature (HF5 or probe) in the event of:
o Loss of communication with the probe (HF5 function)
o Sensor failure (probe function)
Can be configured, enabled or disabled
4.2 Interaction between the HF5 and probe functions
It is important to note that when used together, the HF5 transmitter and HC2 probe (HygroClip 2) constitute a
2-component system. Each system component has its own microprocessor, firmware and functions. Some of
these functions are unique to each system component. Other functions are found in both components.
HF52 (2-wire, loop powered transmitter): due to the necessity of limiting the current consumption of the
combination of HF52 and HC2 probe to less than 4 mA, several probe functions such as RH sensor test, data
recording and probe adjustment are not available with the HF52.
The functions and settings of the HF5 transmitter and HygroClip 2 probe (HC2) operate together as indicated
below:
Function / Setting HF5 HC2 Notes
Device protection X X Individual to the HF5 and HC2 probe
RS-485 address X X Individual to the HF5 and HC2 probe
Device Name X X
User defined description
The device name of the HC2 probe is not displayed by HW4 and is
replaced with the HF5 Input Name
Calculation X X
Psychrometric calculation
HF5 setting overrides HC2 probe setting
Data refresh rate X
This setting has no effect on the HF5 and probe. Depending on the
model, the data refresh rate is as follows:
HF52: typically 5 s
Other models: typically 1 s
Simulator function X X
Generates fixed humidity and / or temperature value
When enabled, the HF5 settings override the HC2 probe settings
Unit system X X
The HF5 setting overrides HC2 probe setting regarding the HF5
signals. The HC2 probe settings still apply when the probe is used
alone
Make sure to use the same humidity symbol and the same
temperature unit for both the HF5 and probe.