NANOpure Low Purity System Checks:
275 Aiken Road Phone 800-438-4851 www.thermofisher.com
Asheville, NC 28804
1. Open the front door of the Nanopure and examine the cartridge
pack. Note the
cartridge catalog number, lot code, and expiration date. If the
cartridge has been
installed longer than one year, consider replacing the cartridge
pack first. If the
cartridge has a noticeable gap at the top (like it is not
completely filled with filter material), this is a sign of
cartridge exhaustion.
2. Measure the flow rate from the main delivery knob on top of
the unit. You should be able to dispense approximately 1.5 liters
per minute. If you are getting significantly
less than this, open the right side door by turning the screw on
the door (the door
should then swing open). Place your hand on the pump or listen
for vibration (the
pump should be on/vibrating whenever the purity is displayed on
the screen). If the
pump is not running, locate a screwdriver, grab it by the blade,
and tap repeatedly on
the pump. The pump may start running again. If the pump does not
continue to run,
order a new pump, part number PU1190X1. If the pump is running
and the flow is
still low, check the following:
a. Ensure feed water is of adequate pressure (Gravity feed 100
psi is acceptable, 30-50 psi is ideal)
b. Ensure no other filters are clogged (0.2 micron final filter
or Ultrafilter)
c. Ensure there are no kinks or clogs in the tubing or other
component (most notably the pressure regulator)
3. Purchase a NIST calibration module, part number E896X5. After
you receive the module, first perform a calibration per the users
manual. Then, leaving the module attached, press start on the
display, and note the purity value. With the module plugged in, the
display should read 15.0 Mohm-cm. If it does read 15.0 (+/- 0.3
Mohm), your boards are reading the purity properly. If it does
not read 15.0 when
plugged into J2 of the calibration board, try plugging the
module into P2 of the meter
board (slightly larger board, also mounted on the side door of
the Nanopure). If the
reading does change to 15.0 when plugged into P2, the
calibration board is bad. If it
does not change to 15.0 when plugged into P2, the meter board is
most likely bad.
