Bronkhorst Vapor Delivery Module - Manual (Page 19)

Bronkhorst®
Vapor Delivery Module 19 9.17.079
5.2.4 Temperature and flow setpoint
Setpoint can only be edited when the setpoint parameter is
displayed in 'Custom readout 1' or 'Custom readout 2'.
To edit the setpoint press to select the readout area in
which this parameter is displayed. Press to enter the edit
mode, the first digit will lighten.
Security settings can be set to avoid unauthorised
access to the setpoint parameter.
Use or to change the digits, press to confirm and
select the next digit.
You can change the setpoint edit mode into 'step'.
This enables you to change the setpoint using fixed
steps. See section 'Customize display info' in the
E-8000 manual (9.17.076) for more detailed
information.
After the last digit is confirmed by pressing , the setpoint
will be sent to the instrument.
If the entered setpoint is ignored, check controller
mode. See section 'Controller mode' in the E-8000
manual (9.17.076) for more detailed information.
The button can be used to exit the edit mode
and cancel the changes.
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This chapter explains the most important user interface options. For more information please check the E-8000
manual 9.17.076 at: http://www.bronkhorst.com/en/downloads
5.3 Operating settings
Make sure that the tracing and heating temperatures are well above the dew point of the desired vapor flow at the process
conditions.
Especially for tracing, the temperature is only controlled at a single location, while inadequate insulation may
introduce cold-spots at which condensation may occur.
Be aware that the temperatures (both heater and tracing) depend on the location of the sensor. Therefore, it is advised to set the
heater temperature approximately 20°C above the theoretical temperature.
In addition, it is advised to set the tracing temperature another 10°C higher.