<< Click to Display Table of Contents >> Navigation:  Humidity & Temperature Devices > ATEX Devices > Genral Description

Commissioning

HygroFlex5-EX (two-wire current loop, loop-powered): 10 ... 28 VDC depending on the loads connected to the

outputs. The minimum supply voltage can be calculated as follows:

 

V min = 10 V + (0.02 A x load*) *Load resistance in ohms.

 

The minimum supply voltage for the maximum load of 500 Ω is 10 V + (0.02 A x 500 Ω) = 20 VDC. If both output

circuits are closed, the maximum current consumption is 40 mA.

 

The device must be properly closed when in operation in order to achieve explosion protection.

 

 

Calculated parameters

The HygroFlex5-EX reads out the data of the connected probe.

The user can configure the HygroFlex5-EX with the ROTRONIC HygroSoft software to calculate one of the following

parameters:

 

•Dew point (Dp) above and below freezing point

•Frost point (Fp) below freezing point and dew point above freezing point

•Wet-bulb temperature (Tw)

•Enthalpy (H)

•Vapor concentration (Dv)

•Specific humidity (Q)

•Mixing ratio by weight (R)

•Vapor concentration at saturation (Dvs)

•Vapor partial pressure (E)

•Vapor saturation pressure (Ew)

 

Note:

Some of the above-mentioned parameters depend on the value of the atmospheric air pressure.

The user can define a fixed atmospheric air pressure value with the ROTRONIC HygroSoft software.

 

 

Analog out signals

Using the ROTRONIC HygroSoft software, each of the two analog output signals can be assigned to one of the

following parameters:

 

•Measured relative humidity (%RH)

•Measured temperature (°C/°F)

•Calculated parameter

 

The scale of each analog output can be set within the numerical limits of -999.99 and 9999.99.

The analog output signals are generated by 16-bit D/A converters.

 

 

Service Connector

The service connector (UART interface with mini-USB port) allows connection of the HygroFlex5-EX

to a PC running the ROTRONIC HygroSoft software. A service cable is needed for this. See chapter Maintenance

for the location of the service connector and the type of service cable.

 

• The service connector is used for configuration and for updating the firmware of the HygroFlex5-EX.

 

 

Probes

The HygroFlex5-EX may only be operated with the following ATEX probe models:

 

 

Function overview

 

Outputs

 

Measurement loop validation

 

Safety

 

PROCESS PROTECTION / PROTECTION OF OTHER DEVICES