General Maintenance; Maintenance/Cleaning; Sterilisation/Autoclaving; Fluid-Path Disassembly Procedure - VWR International DIGITRATE PRO Series Instruction Manual

General Maintenance

Maintenance/Cleaning

1. Place the instrument into a sink together with its reservoir. Unscrew the threaded platform base (10) and
lift the dispenser's intake tube (14) carefully out of the reservoir, whilst tapping it against the reservoir's
aperture in order to shake off any droplets from the intake tube.
2. Hold the FEP dispense tube nozzle (12) over the aperture of the reservoir and apply gentle piston strokes
in order to return the contents into the reservoir.
3. Flushing out with distilled water or a suitable solvent is recommended after the Digitrate
used with crystallizing fluids. This will preserve the smooth action of the piston and free action of the inlet
and outlet valves. If the inlet valve (11) 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.
4. Empty the instrument completely after cleaning.
Note:
All maintenance should be carried out wearing suitable eye protection and protective clothing. If in doubt,
consult your safety officer.

Sterilisation/Autoclaving

Note:
The electronic display head cannot be sterilised or autoclaved. Chemical sterilisation will damage electronic
components. Autoclaving will cause permanent damage to the electronic components and the battery may
explode.
Before sterilisation or autoclaving, please follow the maintenance 'flushing out procedure'. Sterilisation/
autoclaving is carried out to 'fluid-path' components only.
Chemical sterilisation is permissible by soaking the 'fluid-path' components overnight in a dilute (1:1000)
solution of sodium hypochlorite. The Digitrate
method is used.
Autoclaving of 'fluid-path' components is permissible at 121 °C, 2 bar, after the normal cleaning procedure
has been carried out.

Fluid-Path Disassembly Procedure

Disassembly should only be undertaken AFTER the unit has been cleaned, using the standard cleaning
procedure described above. Undo the threaded platform ring (4) of the base platform and remove the
electronic display head (2) together with the PTFE piston (7), piston rack (5) and polypropylene protection
sleeve (3) from the platform base (10). Take care not to lose the FEP 'O' ring (9) which is mounted inside the
platform recess.
Slide the glass barrel (8) off the piston (7) and lay it in a safe place. Turn the titrate wheels (1) down until the
piston rack (5), together with the PTFE piston (7), disengages from the electronic display head (2) and slide
them back into the glass barrel (8) from the bevelled edge end, taking care not to damage the piston when
inserting it into the glass barrel.
Place these components and the threaded base platform (10) with FEP dispense tube (12) and protection
cover (13) attached, together with PTFE inlet tube (14) on a suitably soft surface within the autoclave in
order to avoid metal contact.
Steam sterilisation of the piston outside the glass barrel may damage it. Do not use hard tools to scrape off
residue of reagent from the piston. Do not use force in assembly or disassembly.
Pro should be rinsed well in sterile, distilled water if the latter
EN
Pro has been
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INSTRUCTION MANUAL
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