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IN-E-HyClip DI-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroClip DI digital interface: instruction
manual
Document title
Page 13 of 24
© 2007; Rotronic AG IN-E-HyClip DI-V1_10.doc
Dew point (Dp) or Frost point (Fp): depending on the selection made here, HW4 will display
either the symbol Dp or the symbol Fp. The symbol Fp indicates that any value below
freezing is a frost point as opposed to a dew point. When selected, the symbol Fp is also be
displayed for values above freezing. This of course is to be understood as being the same as
dew point.
● Fixed pressure value: Calculating some of the psychrometric parameters requires
barometric pressure as an input. Enter here the fixed pressure value that will be used by the
HygroClip DI. Note that this numerical value should be consistent with the pressure unit that
was selected under Language / Unit System.
● Alarm: alarm conditions can be defined for humidity, temperature and the calculated
parameter. Values that are below the low alarm value or above the high alarm value will
trigger an alarm. A value can be specified for the alarm function hysteresis. This value is
used for both the low and the high alarm. To trigger an alarm only in the event that a probe is
missing, disconnected or not transmitting data, simply enable the alarm for one of the
parameters and set the Hi and Lo values to the range of the probe (for example 0 and 100 for
humidity). All versions of HW4 will show an out-of-limits value alarm in red on the monitor
screen. HW4 Professional can also be configured (HW4 global settings - Alarm settings tab)
to display an alarm table and generate a report whenever an out-of-limits condition occurs.
Digital Interface
This form is used to select the RS-485 baud rate between 57600 and 19200. Other data cannot
be changed from within the form. Select the Baud rate depending on which devices you plan to
connect with the HygroClip DI. Devices such as the HygroFlex transmitter normally use 19200
bps.