Humboldt H-1756.4F Vibrating, De-airing Device - Manual (Page 2)

Introduction
The H-1756B Heavy-duty, Vibrating, De-airing Table is used to remove air
from Rice Test samples by providing constant vibration to Rice Test Vacuum
Pycnometers. The use of the H-1756B De-airing Table provides consistent test
results and provides unassisted operation, freeing lab technicians for other
duties. Exclusive, quick-release cam/lock fasteners allow quick placement and
removal of canister.
The H-1756B
is designed for use with Humboldt’s H-1750 and H-1750SS, 2 kg
capacity canisters, the H-1751, a 1500g pycnometer, as well as 2 liter flasks with the op-
tional H-1753 Flask Attachment.
The H-1756B operates with a variable speed control up to 2400 VPMs at 115V 60Hz
and the H-1756.4F operates with a variable speed control of 3,000 VPMs at
230V 50/60Hz
General Information
Inspection:
Your Rice Vibrating Table was thoroughly inspected before it was shipped and should be
ready to operate as soon as you have completed the set-up procedure. Notify Humboldt
Mfg. Co. or your local agent and file a claim with any carriers involved if you find any
damage to the machine.
Physical Specification:
Shipping weight: 12 lbs (5.4 kg)
Overall height: 15-1/2"
Base dimension: 11" Diameter
Power Supply:
H-1756B: 115V 60Hz
H-1756.4F: 230V 50/60Hz
Check that your machine has the correct voltage for your local supply.
Initial Installation
Set the machine base up at the place it is to be used in the laboratory and then decide
if you plan to operate the machine resting on the three rubber feet as supplied or
permanently connected through the extra mounting holes in the base. The mounting
holes are 3/16” diameter on a 10-1/8” diameter bolt circle.
Put your H-1750 Pycnometer with cover into place on the H-1756.4F or H-1756B by
sliding it through the top ring slot and into position under the top ring. If not already
engaged press down on the ring to compress the springs and hook the screw heads from
the latches into the keepers on the ring. Now try latching the ring down. If you can’t get
the latches down, or if they go down and are too loose to hold the ring down, you can
make a final adjustment by turning the latch screw(s) and re-tightening their nuts. The
proper setting is when the keepers are deflected downward slightly when latched. This
pressure on the keepers should hold the pycnometer in place when there
is a vacuum drawn on it.