Heidolph Pump Heads - Manual (Page 65)

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9.3.7. Interval metering
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Interval metering is a sub-routine of metering by volume mode; repetition is not launched by
hitting a key or by a triggering pulse, but automatically after a pause selected before.
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Set volume as described in chapter 10.3.5, metering by volume.
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Hold "Select" key (36) depressed until LED "pause sec/min/h" is lit.
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Enter pause with arrow keys (35); choose pause between 0.1 seconds and 750 hours.
seconds range: display 0.1 to 599.9 (no extra signal displayed)
minutes range: display 10 to 599, „'“ displayed (600sec = 10min)
hours range: display 10 to 750 "h" displayed (600min = 10Std.)
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Hold "Select" key (36) depressed until LED "Vol min" and LED "Pause sec/min/h" is lit the
same time.
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Interval metering is controlled with the "Start Stop" key (32) or via the interface.
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After having hit the "Start Stop" key (32) the metered volume is displayed (41), rising from
zero to the current value, or a pause interval rising from zero to t the value set before. The
respective LED is going to flash.
9.3.8. Adjust backstroke for metering by volume mode (fig. 48)
To avoid dripping in the "metering by volume" mode, a short backstroke of the pump may be
programmed.
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Turn power switch (29) OFF. Hit "Cal" key (34), and, while holding depressed, turn power
switch (29) ON.
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Pump head, e.g. "Pu 1" is displayed (41).
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Hit arrow keys (35) until "r on" or "r off" is displayed (41).
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"r on" turns backstroke ON, "r off" turns backstroke OFF.
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Confirm mode with "Select" key (36)
9.4. Interfaces (fig. 49)
9.4.1. Analog interface
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An analog interface connector (37) is installed in the item's rear panel.
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External pump control uses this analog interface.
Control voltage of 0 - 10 volts equals rotational speed between 0 and max.
control voltage PD 5201 PD 5206
0 - 0.9 V 0 [1/min] 0 [1/min]
1 V 5 [1/min] 24 [1/min]
10 V 120 [1/min] 600 [1/min]
Control current 4 - 20 mA equals rotational speed between 0 and max.
control current PD 5201 PD 5206
0 - 4.9 mA 0 [1/min] 0 [1/min]
5 mA 5 [1/min] 24 [1/min]
20 mA 120 [1/min] 600 [1/min]