KD Scientific Gemini 88 - Manual (Page 31)

29
KDS Gemini 88
Appendix H: Troubleshooting
RS-232 DIFFICULTIES
Verify that the baud rates and data framing parameters on all devices are the same. With a
pump chain, a “Communication timeout” error on a computer is usually caused by the com-
puter errantly handshaking on the RTS, CS and/or DSR lines. Verify pins 4, 5 and 6, on the
25 pin connector, are jumpered on the computer side of the cable.
DISPLAY MESSAGES:
All digits flashing
Pump has not received any commands since being powered on.
Stall
Also a syringe LED and Run LED flashing. This indicates that the pusher block travel of the
syringe corresponding to the syringe LED blinking has been impeded. This may be caused
by the syringe plunger hitting bottom, a kink in the tubing, syringe plunger binding or any sit-
uation requiring more force to the head of the syringe than the pump is capable of deliver-
ing. To restart the pump, remove the cause of stalling and press RUN. The pump will contin-
ue the interrupted procedure where it stopped. Also note, a large increase in the pumping
rate while running could also stall the motor.
oor
Out of range. A value was entered or encountered in a pump program that was beyond the
pumps limits. Try using a different size syringe. Note that rates must be less than 42950.
Express larger rates using different units.
- - - - -
Key pressed is not applicable.
Appendix I: Accessories
Catalog No. Product
MA1-55-4144 Foot Switch
MA1-55-7760 Daisy Chain Cable 2ft for connecting two or more pumps; need 1
cable per pump
MA1-70-2022 RS-232 Connector Cable, 7ft, 9 pin D-Sub
MA1-55-7000 Continuous Delivery Valve Box, normal pressure, 30 p.s.i. supplied
with 1/8” ID x 1/4” OD silastic tubing and connector cable for
connection to the syringe pump.
MA1-55-7001 Continuous Delivery High Pressure Valve Box, high pressure, 200 p.s.i.
supplied with 1/4” OD 304 stainless steel tubing with SWAGELOK ®
fittings and a connector cable for connection to the syringe pump.