Watson-Marlow PF6 - Manual (Page 19)

INSTRUCTION HANDBOOK
PF6
PF6 IH EN 74-105-022 v1.04.doc Version: 1.04 Page 19 of 30
Function 5 - Reversing (back suction)
Value: An integer number.
After each filling the pump head can be set to perform a small back suction to prevent dripping.
The back suction can be set at values between 0 and 10.
0 = no back suction
10 = maximum back suction
The value has no relation to any other parameters and is solely a number of degrees of a rotor turn.
Consequently, the volume that is sucked back will depend on the tube diameter.
Function 6 – Batch size
Value: An integer number.
Enter the number of fills you want the filler to perform when started by <GO>, foot switch or via
electrical signal. Any number of fills between 1 and 65,000 can be selected.
Function 7 – Delay
Value: Seconds.
If more than one fill is chosen in function 6, enter the required delay between the fills.
The value of the delay can range between 0.1 - 25.0 seconds, with a graduation of 0.1 second.
Function 8 – Fillings (completed fills)
Value: An integer number
Nothing can be entered in this function as it only displays the number of fills completed since the
latest reset of the function.
To reset this function: Press the keys <8>+<ENT>+<C>+<ENT>
Function 9 – Specific gravity
Value: Numerical
The specific gravity of the product used can be entered here.
Default value for this function is 1.0000 g/ml.
The PF6 uses this value to obtain the volume in F1, when volume mode is used.
Changing specific gravity should be followed by a calibration.
Function 10 – Fills pr. Minute (Output rate)
Value: Number of fills per time unit.
Nothing can be entered in this function as it only displays the current output.
The function displays how many fills the system carries out per time unit.
The function operates as follows: The PF6 records the precise time between two fills via the built-in
clock, and calculates the number of fillings per time unit.
The display is updated at the completion of each fill.
The function can be called up for viewing, but it cannot be reset and values cannot be entered in this
function.