The Volume Adjustment Knob; User Calibration Procedure; Maintenance/Cleaning - JENCONS ZIPPETTE PRO Series Operator Instructions Manual

The volume adjustment knob

Turning the volume adjustment knob (Drawing 1) clockwise, will increase the volume to be dispensed. Each
full revolution of the knob represents 2ml and is shown on the cursor aligned to the graduations.
For fine volume adjustments, turn the knob a quarter turn in either direction for 0.5ml adjustment.

User Calibration procedure

Your Zippette Pro has been laboratory calibrated to it's nominal volume of 30ml. However, due to changes in
environmental conditions and the viscosity of the media which you dispense, a recalibration might be
required. You can either recalibrate at regular intervals such as once a week or whenever you notice that the
dispensed volume is different from the volume displayed by the unit.
To fully recalibrate your Zippette Pro follow the following steps:
1. Set the Zippette Pro to the nominal volume of 30ml or any other volume which is the most common
volume you dispense.
2. Follow the common rules for calibration used in statistical quality control (ISO DIS 8655/2). Dispense
five full volumes of distilled water at 20°C to establish the actual mean volume of liquid dispensed. If
the gravitational average result varies from the volume displayed, you should recalibrate the Zippette.
3. Using a Cross Head screw driver no.00, slightly undo the cursor's screw and move the cursor up or
down until it aligns with the graduation of the actual volume established in step 2.

Maintenance/Cleaning

Note; All maintenance should be carried out wearing suitable eye protection and protective clothing. If
in doubt, consult your safety officer.
1. Make sure that the Zippette is completely empty and turn the anti-drip tap to 'Open' position.
2. Place the instrument into an empty sink together with its reservoir. Unscrew the threaded platform
base from the reservoir and lift the dispenser's intake tube carefully out of the reservoir, whilst tap-
ping it against the reservoir's aperture to shake off any droplets from the intake tube.
3. Hold the dispense nozzle over the aperture of the reservoir and apply gentle piston strokes in order
to return any syringe contents into the reservoir.
4. Flush out remaining syringe contents with distilled water or a suitable solvent. This will preserve the
smooth action of the piston and free action of the inlet and outlet valves. If the inlet valve does stick
and is not freed by flushing, it may be freed by gently inserting a thin rod into the inlet aperture and
gently pushing the ball off its seating. Re-check unit for operation.
5. Empty the instrument completely after cleaning, and flush through with distilled water.
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Operator Instructions