HF scientific AccUView UV %Transmission Monitor - Manual (Page 11)

3.2 Plumbing
The recommended plumbing for the instrument is shown in Figure 4. The instrument is
designed to require very little head pressure to operate; around 6.9kPa (1 PSI). Flow
requirements are 100ml/min. – 1 liter/min. (0.026-0.26Gal/min). The integral flow
regulator will limit flow to around 1 liter/min. The pressure regulator will allow for a
maximum pressure of 1380kPa (200 PSI.). The maximum allowable fluid temperature is
50°C (122°F).
Figure 4: Recommended Plumbing for the Instrument
The instrument is equipped to be plumbed using 4.75 mm (3/16”) ID, 8 mm (5/16”) OD
flexible tubing. Opaque tubing should be used if the tubing will be exposed to sunlight, to
prevent algae growth.
In figure 4, there are two operator controlled flow adjustment devices shown. The one on
the input side is a shutoff clamp used during cuvette maintenance. The other device,
located on the output side of the flow cell, is a backpressure valve. Backpressure may be
required to prevent air from coming out of solution, which may be observed as tiny air
bubbles.
AccUView (6/10)
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