Thermo Scientific iCAP 7000 Series Manual page 63

iCAP Customer Familiarisation Manual iCAP Customer Familiarisation Manual
9.1.1 Teflon capillary tubing: Teflon capillary tubing:
Should be free of kinks and scissor or Should be free of kinks and scissor or
pinch cut ends. For best results, razor cut pinch cut ends. For best results, razor cut
at 45° for the drain. Also check the at 45° for the drain. Also check the
sample peristaltic pump winding condition sample peristaltic pump winding condition
and platen pressure for proper adjustment. and platen pressure for proper adjustment.
Replace the winding if it is used or Replace the winding if it is used or
collapsed. Pump windings typically last ump windings typically last
only a couple of days. Introduce an air only a couple of days. Introduce an air
bubble into the sample uptake tube and bubble into the sample uptake tube and
watch its migration through the tubing, it watch its migration through the tubing, it
should be smooth and consistent. should be smooth and consistent.
Worn rollers, bent pump head shaft or bad Worn rollers, bent pump head shaft or bad
roller bearings can cause inconsistent roller bearings can cause inc
pump action and any such damaged pump action and any such damaged
pumps should be replaced. pumps should be replaced.
The peristaltic pump may also be The peristaltic pump may also be
used for the pumped drain spray used for the pumped drain spray
chamber systems and the internal chamber systems and the internal
standards mixing kits. standards mixing kits.
9.1.2 Peristaltic Sample Pump Peristaltic Sample Pump
Note: When using a concentric or When using a concentric or crossflow free aspirating type nebuliser, the pump
platen pressure should be adjusted with the plasma torch ignited and the pump stopped. platen pressure should be adjusted with the plasma torch ignited
To adjust the Platen Pressure To adjust the Platen Pressure
Dip the uptake capillary (which is Dip the uptake capillary (which is
normally connected to a sipper probe) normally connected to a sipper probe)
into deionised water.
With the nebuliser gas switched on h the nebuliser gas switched on
gradually reduce the platen pressure gradually reduce the platen pressure
by pushing in the tension adjustment by pushing in the tension adjustment
lever until the water freely aspirates lever until the water freely aspirates
through the pump tubing. You can through the pump tubing. You can
briefly remove the capillary or sipper briefly remove the capillary or sipper
probe from the rinse for a short period probe from the rinse for a
to introduce a small air bubble. to introduce a small air bubble.
Tighten the tension adjustment until Tighten the tension adjustment until
the flow stops then tighten by one the flow stops then tighten by one
more turn. Turn on pump and, if more turn. Turn on pump and, if
necessary, tighten the tension until a necessary, tighten the tension until a
smooth flow is produced smooth flow is produced
With pump turned on adjust the drain With pump turned on adjust the drain
pressure to allow small bubbles to pressure to allow small bubbles to
flow in the drain tube
Finally, argon/air leaks can cause many problems including poor precision. Finally, argon/air leaks can cause many problems including poor precision. Finally, argon/air leaks can cause many problems including poor precision.
Check the gas fittings on the lines coming from the bulkhead to the torch and Check the gas fittings on the lines coming from the bulkhead to the torch and Check the gas fittings on the lines coming from the bulkhead to the torch and
nebuliser with a suitable soapy liquid such as Snoop. Leaks at these joints are nebuliser with a suitable soapy liquid su
usually caused by rough tubing and can be stopped by cutting off about 1/2 inch of usually caused by rough tubing and can be stopped by cutting off about 1/2 inch of usually caused by rough tubing and can be stopped by cutting off about 1/2 inch of
tubing and reinserting. Replace the tubing with ¼ inch Teflon if the tubing becomes tubing and reinserting. Replace the tubing with ¼ inch Teflon if the tubing becomes tubing and reinserting. Replace the tubing with ¼ inch Teflon if the tubing becomes
too short
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crossflow free aspirating type nebuliser, the pump
ch as Snoop. Leaks at these joints are
This document is part numbered 849940090071 This document is part numbered 849940090071
and the pump stopped.
Version 1.02