GRASEBY Ms 16A Infusion Pump Service Manual - internetMED
GRASEBY Ms 16A Infusion Pump Service Manual - internetMED
GRASEBY Ms 16A Infusion Pump Service Manual - internetMED
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Volts<br />
MS<strong>16A</strong> Syringe Driver<br />
Smiths Medical<br />
To measure the motor interval time, a conventional scope with a good<br />
trigger is required; a storage scope would be better. Using the<br />
variable power supply, place a 4R7 ohm resistor in the negative<br />
supply line, and with a x10 scope probe, measure the voltage across<br />
the resistor.<br />
Run the pump at maximum rate and compare each consecutive pulse<br />
over six pulses. Figure 5-3 illustrates the typical waveform expected.<br />
The motor run time is measured from the start of the plateau to the<br />
trailing edge of the waveform, where it is cut off by the cam’s action.<br />
0.16<br />
MS16 Motor Pulses<br />
0.14<br />
0.12<br />
0.10<br />
0.08<br />
0.06<br />
0.04<br />
0.02<br />
Cam Period<br />
5<br />
0<br />
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65<br />
GM0105_8044-GB-B<br />
Time (seconds)<br />
Figure 5-3 Typical waveform for one pulse<br />
The variation in duration of the six consecutive pulses in each<br />
revolution should not be more than 20%. If necessary, adjust the<br />
motor run-time ratio by a slight bending of the cam follower lever,<br />
using tool part number 0105-0079. Use the tool as shown in Figure 5-4<br />
to tweak the operating lever so as to mimimise the error.<br />
Note that the time interval between successive pulses may vary<br />
slightly. This is not a controlled parameter, and variation is<br />
permitted.<br />
5 — 6<br />
Issue 6 (February 2005)<br />
Technical <strong>Service</strong> <strong>Manual</strong>