Cannon Instrument CT-600 (Contant Temperature Bath) - Manual (Page 13)

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CANNON CANNON CANNON CANNON CANNON ® CT-500/600 Series II CONSTANT TEMPERATURE BATH
Version 3..2—March, 2007; CANNON CANNON CANNON CANNON CANNON ® Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA
Final assembly
Connect all remaining plugs and probes to the correspondingly labeled
and/or color-coded sockets at the rear of the CT-500 bath unit.
(see Figure 6)
Figure 6: CT-500 rear panel connections. All connections marked with " " contain potentially
hazardous voltages. These sockets are for connection to CT-500 plugs ONLY (see below).
Rear Panel Connections:
Control Thermistor — Connects main temperature control thermistor to the Control Unit
Float Switch — Connects the fluid-level sensor to the Control Unit
Over-temp. Thermistor — Connects over-temp. thermistor to the Control Unit
Heaters — Supplies AC Mains power to the bath heaters
Stirrer — Supplies AC Mains power to the motor-stirrer
Fuses — Protects against damage or hazard in the event of an internal fault
Mains — Provides AC mains power entry connection
CAUTION The CT-500 power cord must be connected to an AC mains source
matching the specifications of the S/N label on the instrument rear panel.
Inserting viscometer tubes/thermometers
The top cover of the CT-500 contains seven apertures, 51 mm (2") in
diameter, for the insertion of viscometer tube holders. Two additional
holes are provided for insertion of thermometers.
Inserting viscometer tubes
If necessary, remove the viscometer tube hole cover(s) from the top of
the bath and carefully place the viscometer tube(s), with the proper
holder attached, into the bath through the aperture(s) in the top cover.
NOTE After filling the bath with fluid, adjust the height of the viscometer tube(s)
to ensure that the liquid under test and/or any timing marks on the tube
are a minimum of 6 mm (¼") below the top level of the liquid.
Thermometer immersion
Proper thermometer immersion is critical for viscosity measurements.
Even a calibrated thermometer will read incorrectly if is it improperly
immersed in the bath. “Total immersion” kinematic viscosity thermom-
eters should be used with the bulb and only the mercury column beneath
the surface of the liquid, but with the emergent stem above the surface at
ambient temperatures.