UVP HEPA/UV PCR Systems - Manual (Page 14)

HEPA/UV3 PCR Workstation and Cabinet Page 14
Replacing UV Tube in the Filter System
Follow steps 1 and 2 under “Replacing the Filters” and remove the carbon filter as described in step 4
above. Step 5 shows location of the UV tube.
The tube has two prongs on each end that first fit into a socket then rotates into place. To replace the
tube, carefully hold the tube on the end and insert the tube into the socket. Twist the tube 90° until the
tube locks into place.
Replace carbon filter and retighten the knobs (2) on the workstation ceiling.
Replacing the Fuses
Fuses are located on lower corner of the system.
To remove the fuse, use a flathead screwdriver
to turn the fuse counter-clockwise. Pull the fuse
out.
Insert the new fuse and using the screwdriver,
turn the fuse clockwise to lock.
Replacing the Tube in UV/Air Circulator
1. Locate and remove the two thumb knobs on
the circulator cap on the outer back panel of
the system.
2. Pull the circulator cap away from the system.
3. The tube, attached to the cap, has two
prongs on each end that fit into a socket.
Carefully hold the tube on the ends, rotate
the tube and remove from the cap. Insert a
new tube into the socket. Twist the tube 90°
until the tube locks into place.
4. Replace the place cap back into position and reattach the two thumb knobs.
Replacing Tubes in the Chamber
Turn the unit power off and unplug the unit from the outlet. Lift up the panel door and locate the
tubes. The tube has two prongs on each end that first fit into a socket then rotates into place.
Carefully hold the tube on the end and insert the tube into the socket. Twist the tube 90° until the
tube locks into place.
Note that UV tubes are clear while white light tubes are white.
Measuring the UV Tube Intensity
As the ultraviolet tubes age, the intensity and germicidal destruction rate decreases. It is important to
monitor the efficiency of the tubes to ensure the germicidal requirements are met. The germicidal
destruction rate is a function of the UV intensity at wavelength 254nm and exposure time. The lower the
tube intensity, the longer the lamps must be on to accomplish the same objective.
The UVX Radiometer using a 254nm sensor will allow the user to measure the 254nm emissions from
the tubes. When it is time to measure the UV intensity inside the PCR workstation (recommended
weekly or when needed), the sensors can be placed on the floor of the PCR. Close the hood and turn
on the UV tubes. Wait 3 minutes to record the measurement on the UV meter. It is recommended that
the user record an initial value upon receipt and assembly of the PCR unit.
UV/Air
Circulator
Cap