TVOC 2 MANUAL
Ion Science Ltd
Page 22 of 32
Unrivalled Gas Detect
ion.
ionscience.com
Maintenance
5.
The
electrode stack
and
PID
lamp
can then be removed using the
Electrode Stack Removal tool (846216).
Warning
:
Only use the electrode stack removal
tool. Any other tools (for example
screwdrivers) may damage your
MiniPID body and will invalidate your
warranty.
i.
Locate electrode stack removal tool in the side slots of the MiniPID and squeeze together until electrode stack and
lamp are released.
ii.
Carefully lift the MiniPID 2 body away from the electrode stack and lamp.
iii.
Occasionally the lamp may be temporarily lodged in the cell and will need to be freed carefully with tweezers.
Occasionally the small spring behind the lamp will come out when the lamp is removed from the sensor. Simply
replace it into the sensor house.
Inspecting the MiniPID stack
On removal of the electrode stack, carefully inspect the underside. The visible electrodes should be shiny and
metallic. If there are any signs of corrosion or water ingress the stack should be replaced (A-846496).
Inspecting and cleaning the MiniPID lamp
Inspection of the MiniPID lamp, as shown in the illustration, may reveal a fine
film of contamination on the lamp window. However, it should be noted that
window contamination is frequently not visible.
Black or metallic deposits on the interior face of the lamp cannot be removed.
If the deposits are extensive, the lamp must be replaced.
To clean the lamp, use of MiniPID lamp cleaning kit A-31063. Validity of
lamp warranty is compromised if lamp cleaning maintenance is not
followed and lamp has obvious fouling/contamination.
i.
Wash hands, or wear gloves. Never touch the lamp window, even
with gloves. The lamp body may be touched with clean fingers.
ii.
Open the container of alumina polishing compound.
iii.
With a clean cotton bud, collect a small amount of the powder.
iv.
Use this cotton bud to polish the PID lamp window. Use a circular
action, applying light pressure to clean the lamp window. Do not
touch the lamp window with fingers.
v.
Continue polishing until an audible “squeaking” is made by the
cotton bud moving over the window surface. Usually this requires
15 to 30 seconds polishing.
vi.
Remove the residual powder from the lamp window with a clean
cotton bud. Care must be taken not to touch the tips of cotton buds
that are to be used to clean the lamps.
vii.
Ensure the lamp is completely dry and all detritus is removed before refitting.
Stack removal
tool (846216)
Diagram 17
Electrode
stack
Diagram 18
Diagram 19
