AccUView LED (1/2020)
Rev 2
6
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. – 1.5 liter/min. (0.026-0.40Gal/min). The pressure regulator
will allow for a maximum pressure of 1380kPa (200 PSI.). The maximum allowable fluid
temperature is 50°C (122°F).
An optional flow regulator Cat# 19778 can limit flow to around 1 liter/min. this is not
recommended for applications involving sea water.
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.
Model 28042 is equipped with a flow switch. For this instrument the user connections are
equipped with ¼” push-to-connect connections. The suitable tubing is polymer or copper
tubing with a ¼ inch OD. These connectors cannot be used with stainless steel tubing.
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.
