3.3.7
Use only the Harris Micro-Punch Tip size corresponding to the Harris e-Core model listed
in the Table under Section 1.0. The use of other Harris Micro-Punch Tips on a non-corresponding
Harris e-Core model and plunger ejection rod diameter may result in damage to the plunger ejection
rod mechanism and/or incomplete sample ejection delivery. Therefore, for example, use only a
1.2mm Harris Micro-Punch Tip with the Harris e-Core 12. Do not use a 2.0 mm Harris Micro-Punch
Tip on the Harris e-Core 12 and vice versa. Each Harris e-Core unit is sold with a plunger ejection
rod with a specific outside diameter for use with a designated coring tip inside diameter. This ensures
complete sample ejection and delivery. Although the Harris e-Core threaded Drive Shaft will accept
other diameter Harris Micro-Punch Tips used in different Harris e-Core models, a smaller diameter
plunger ejection rod may not be capable of ejecting larger diameter discs cored with larger diameter
Harris Micro-Punch Tips.
3.4 Sample Ejection and Clean Up
3.4.1
Position the Harris Micro-Punch Tip over the desired collection
area or sample holder (i.e. microfuge, test tube, multiwell plate,
etc.). Using the thumb depress the black Ejection Button (right side)
at top. Make sure the disc drops into the receptacle and does not
adhere to the side of the receptacle. There is no static generated
from the Harris e-Core during the coring or the ejection process.
The low rpm and short coring cycle do not contribute static, but
there may still be ambient static due to dry conditions or climate.
Therefore, as a precaution, we suggest the user monitor disc delivery.
3.4.2
Follow the cleaning instructions for the Harris Micro-Punch Tip and Harris Cutting Mat in
Section 4.0 to clean instruments between sampling.
3.4.3
When finished coring unplug the e-Core, place the cover cap on the tip and return
the unit to storage case.
4.0 Cleaning
The Harris e-Core cuts rather than shears or tears samples from substrates. This coring/cutting
action eliminates the creation of artefacts and possible cross contamination between collected and
ejected discs. To further prevent cross-contamination between samples, you may clean the cutting
edge of the Harris Micro-Punch Tip between each coring operation. Dip the cutting edge into a 2%
solution of sodium hypochlorite (NaClO) and press the plunger up and down a few times. After
rinsing, wipe the tip and plunger with a clean paper towel. The Harris Cutting Mat may also be wiped
down with 2% sodium hypochlorite solution after each sampling.
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