D-Series Syringe Pumps - Isco
D-Series Syringe Pumps - Isco
D-Series Syringe Pumps - Isco
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D <strong>Series</strong> <strong>Syringe</strong> <strong>Pumps</strong><br />
Section 8 Continuous Flow Introduction, Installation, & Operation<br />
3. Zero pressure in each pump (requires valves open to atmosphere).<br />
4. Purge air.<br />
5. Perform the total volume reset operation, as previously<br />
described.<br />
6. Be sure “ON CONT FLOW” is displayed on the screen.<br />
7. When the pumps start delivering, the system will go<br />
through an equilibration phase. To properly equilibrate the<br />
pumps, they must be full and delivering fluid during equilibration<br />
phase.<br />
8. Press RUN.<br />
Operational Overview –<br />
When using liquefied gases<br />
1. Zero pressure in each pump if empty (valves must be open<br />
to atmosphere).<br />
2. Fill both pumps completely.<br />
3. Pressurize both pumps.<br />
4. Perform the total volume reset operation.<br />
5. Be sure “ON CONT FLOW” is displayed on the screen.<br />
6. Press the RUN key.<br />
8.8 Special Features The following special features may be useful for your continuous<br />
flow applications.<br />
8.8.1 Remote Start/Stop The D <strong>Series</strong> syringe pump can be externally started or stopped<br />
by switch contact closure or TTL input. The TTL input voltage is<br />
5 volts and is internally pulled high (RUN). The input is level<br />
sensitive and must remain High for RUN and Low for STOP.<br />
The control wire should be connected to terminal 1, and the<br />
common wire should be connected to digital ground. To use the<br />
remote RUN/STOP feature, first press RUN or force the<br />
Run/Stop pin low and then high to start the pumps. Thereafter,<br />
the Run/Stop pin will control operation. Pressing STOP on the<br />
front panel will override the Run/Stop pin.<br />
8.8.2 External Analog<br />
Control<br />
8.8.3 Serial Control and<br />
Monitoring<br />
Flow or pressure setpoints can be externally controlled by analog<br />
voltage. Two wires are required for analog control. The analog<br />
common or ground wire should be connected to the GND terminal<br />
under ANALOG INPUT, and the analog control signal (or<br />
input) should be connected to terminal 1 under ANALOG INPUT.<br />
For more information, see section 3.7 of this instruction manual.<br />
The pumps can be externally controlled with a computer which<br />
has an RS-232-C serial output. The serial interface accepts<br />
English command words from the computer, like constant<br />
pressure, refill, etc. For more information, see Section 6, Serial<br />
Interface.<br />
8-19
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