Hanna Instruments HI 903 - Manual (Page 35)

2-11
SETUP
Figure 7
• Place beaker ring (C) onto beaker support with the notches on top (see Figure 6).
• Insert the glass beaker (B) into the beaker ring (C).
• Add the stir bar to the glass beaker (B).
• Carefully place the beaker top onto the beaker (B). Secure in place by pushing the
beaker top through the beaker ring (C) with the 4 notches of the beaker ring aligned
with the 4 steel pins of the beaker top (A).
• Twist the beaker ring (C) counter-clockwise to lock the top in place.
2.3.4.3.1 Beaker top
Warning: Do not over-tighten fittings! This may cause permanent damage to o-rings!
To assemble the 5 parts of the beaker top, see Figure 7 and follow the steps below:
Anti-Diffusion Dispensing Tip
The HI903 ships with the dispensing tip (A) and o-ring (B) installed. For initial setup, go to
third step:
• Push dispensing tip (A) through the dispensing tip o-ring (B) until the o-ring is at
the lip of the dispensing tip.
• Insert tip through the proper port. Orient the tip so that the angled portion is
directed toward the center of the assembly.
• Fasten the dispensing tubing from the burette assembly to the dispensing tip port
using the dispensing tip fitting (C). Ensure that the tip remains oriented toward the
center of the beaker.