Heidolph Hei-VAP Precision - Manual (Page 41)

Operation Operation
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Overview of all softkeys
Softkey Function
Store Favorite Storing the data record for Favorites (program list).
Esc Cancelling the entry and backing up on step, no storage of
changes
Hold The vacuum is held at the value when soft key is depressed.
Start all Vacuum control on, rotation on, lower motor lift
Stop all Vacuum control off, rotation off, raise motor lift
Start Vacuum Vacuum control on
Stop Vacuum Vacuum control off, ventilate system
Graph Display of diagram of pressure/time curve
The actual curve is displayed in the actual value display.
The tabular entries are visualized in the menu program
gradient.
Max. Vacuum Vacuum control on, system is evacuated to the minimum
pressure value allowable considering pump and air leaks.
Continue Vacuum control on (after Hold)
Values The actual value screen or gradient increments screen is
displayed.
Accept The current actual value of the pressure is accepted as a new
set value
List Display of all lists of the stored Favorites.
Scroll Help Scrolling within the context help to visualize hidden text.
Calibrating the vacuum sensor
The vacuum sensor can be calibrated.
Vacuum gauge is available.
The unit is connected.
1. Interconnect the vacuum gauge near the condenser (for example, with a Y-piece).
2. Switch on the vacuum pump.
3. Change to the setup menu and select calibration p-sensor.
4. Confirm with “Yes”.
5. Enter the atmospheric pressure calculated by an external pressure gauge and
confirm by pressing the Hei-GUIDE.
6. The vacuum control now automatically reduces the pressure in the system.
Please wait until the pressure value is stable.
7. Enter the displayed pressure calculated by an external pressure gauge and confirm
by pressing the Hei-GUIDE.
The calibration is completed.
Connecting to a PC
The vacuum box can be connected to a PC via USB.
1. Connect the vacuum box to a PC using an USB cable.
2. Configure HyperTerminal on the PC.
3. Interface settings:
‒ Bits per second: 115200
‒ Data bits: 8
‒ Parity: none
‒ Stop bits: 1
‒ Stream control: none
4. The protocol values are displayed in HyperTerminal:
‒ For example: 20;31.4;25.3;976
‒ Rotation = “20“
‒ HB-Temperature = “31.4“
‒ Ext. Sensor-Temperature = “25.3“
‒ Vacuum = “976“
More Functions