2.1 Start of the program

2.2 Reading the program

2.3 Deleting the program

 

2 FLOW RATE PROGRAMMING (CONTROLLER ONLY)

Up to 99 pairs of flow rates and time periods can be programmed. This allows almost any flow rate profile to be obtained.

If the MASSFLOW is new or the previous program has been deleted the value 0.00 (or 000 for MASSFLOW 500) will be displayed after the "PGM" message (Figure 2-1).

Figure 2-1 To enter the programming sequence press simultaneously the REMOTE and RUN buttons until the message “PGM” appears on the display.
Figure 2-2 Press the ON/OFF button. The message “F01” will appear for one second on the display followed by the value of the flow rate for the first step, which has been stored in memory.
Figure 2-3 Press the buttons Λ Λ Λ under the display to select the desired flow rate value of the first step (for example: 100 ml/min for MASSFLOW 500 or 0.1 l/min for MASSFLOW 5000).
Figure 2-4 Press the ON/OFF button again. The message “t01” will appear on the display indicating that the time period of the first step can be programmed. The display will then show the time period memorized earlier for the first step.
Figure 2-5 Select the time duration of the first flow rate (for example: 005 = five minutes).
Figure 2-6 Press the ON/OFF button. “F02” message will appear on the display and after one second, the value of the flow rate in the memory will be displayed.
Figure 2-7 Select the value of the flow rate of the second step by pressing the Λ Λ Λ under the display.
Figure 2-8 Press the ON/OFF button. The message “t02” will shortly appear on the display followed by the duration, which has been memorized earlier.
Figure 2-9 Select the new time duration for the second flow rate.
In a similar way all other flow rate and time duration steps could be programmed.
Figure 2-10 After having entered the time of the last step, press the ON/OFF button.
For example: “F03” would be the last step of the program in the user manual.
Figure 2-11 The flow rate (000) of the next step which will not be programmed appears on the display. Do not change the flow rate (000).
Figure 2-12 Press both REMOTE and RUN buttons simultaneously to see the message “C” on the display. This function allows to repeat the program from once (if you select “01”) up to 255 times (if you select “255”).
Figure 2-13 If you wish to repeat the same program twice, increase the cycle number to “002” by pressing the buttons Λ Λ Λ below the display.
Figure 2-14 Press the ON/OFF button to confirm the selected cycle. The message “End” will appear on the display and the instrument is ready for use.

 

You have also the possibility to let the program repeat continuously until the MASSFLOW is switched off manually. In this case select c = “00” – this means infinite number of cycles (endless loop operation).

 

2.1 Start of the program

During the execution of the program it is possible to modify manually the flow rate or even stop the flow rate with ON/OFF button. However, the program will go further when the next step is executed. This allows performing certain emergency manipulations without terminating the program.

The running program can be terminated definitively by pressing the RUN button. The corresponding LED will go out.

After the last step of the program the gas flow will be stopped.

The maximum time period, which can be programmed in one step, is 255 min. If the time period is set to 000, then the step time is not limited and the flow rate will continue until the instrument is switched off.

If you wish to maintain a certain flow rate at the end of the program, set the duration of the last step to 000. Such time is not defined and the flow rate will be maintained until the MASSFLOW is switched off manually or the power supply is disconnected.
Figure 2.1-1 The program is started by pressing the RUN button and the corresponding LED will light. The flow rate of the first step will appear on the display if the SET button is activated.
Figure 2.1-2 Otherwise, the reading 000 (or 0.00 for MASSFLOW 5000) seen at the beginning will increase progressively until the programmed flow rate is attained. This may take about 15 seconds depending upon the selected flow rate.

 

2.2 Reading the program

Reading the program is the same as the programming described above. No modification is made by the buttons under the display.

After the last step a simultaneous pressing of the REMOTE and RUN buttons will end the reading process. The message “END” will appear on the display. Pressing the RUN button will start the program.

 

2.3 Deleting the program

Figure 2.3-1 Press RUN and REMOTE buttons simultaneously. The message “PGM” will appear on the display.
Figure 2.3-2 Continuous pressing of REMOTE and RUN buttons even after the indication of "PGM" ends up with the "cLE" message. This indicates that the program has been deleted from the memory.