D-Series Syringe Pumps - Isco

D Series Syringe Pumps
Section 5 Pump Maintenance & Repair
7. You will be asked to designate the pump to refill if more
than one is present. Press a softkey to refill the pump.
8. Fill the pump and repeat this procedure several times.
9. Then place the pump inlet line in a flask containing distilled
water or appropriate solvent. Fill the pump once
more and then run it until empty. You are now ready to fill
the pump with your new liquid solvent.
Note
Do not leave buffer solutions which contain dissolved salts or
are corrosive in the cylinder, overnight or for long periods of
time. The pump should be stored with methanol or isopropanol
(at least partially fill the cylinder with either solvent and then
run the piston all of the way up) when it is not being used.
5.6 General Cleaning For general cleaning of the instrument’s front panel or enclosure,
use a mild detergent in water or isopropyl alcohol on a sponge
which is mostly squeezed out.
5.7 Torque Limiter There are two torque limiting devices on the pump. An indirect
torque limiter is controlled by the operator of the pump. The
operator can set the maximum pressure limit on the pump controller.
(When the pressure exceeds the maximum pressure
setting, the pump is stopped electronically).
The second torque limiting device is a shear key in the worm
gear assembly of the pump. Should the maximum pressure
circuit fail and excessive pressures (pressures that exceed
maximum pressure limits) persist in the operation of this pump,
the torque limiting shear key may become damaged. The shear
key will yield at pressures slightly above maximum pressure,
and it will break around 1.5 times the pressure rating.
In the event of a shear key failure, the pump will sound as
though it is turning, but the piston will not be advancing up the
cylinder. Damage to the pressure transducer and push tube could
be possible if the key failed due to extreme overpressure.
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