Brookfield Bath, Model TC-602 - Manual (Page 33)

32
Application Notes
At a fluid's low temperature extreme:
1. The presence of ice or slush adversely affects temperature stability.
2. A viscosity above 10 centistokes adversely affects temperature uniformity.
3. A high fluid viscosity and high pump speed adds heat to the fluid being pumped.
At a fluid's temperature above ambient without refrigeration:
1. To avoid friction heating of the fluid, the viscosity of the fluid should be 10 centistokes or less
and within 15°C of room temperature.
2. Heat loss should be encouraged by uncovering the fluid and lowering the pump speed.
At a fluid's high temperature extreme:
1. Heat loss from vapor adversely affects temperature stability.
2. To prevent the accumulation of vapors inside the room, the reservoir may need to be placed
in a fume hood.
3. Use a cover and/or floating hollow balls to help prevent heat and vapor loss.
4. Replenish fluid lost from vapor frequently.
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The controller may communicate with Brookfield Engineering Rheocalc Software (V2.0 or higher).
The controller must be connected to the computer with the appropriate RS232 serial cable, see
Section 8.2.
RS232 Protocol —Rheocalc Software uses the following RS232 protocol:
Data bits — 8
Parity — None
Stop bits — 1
Flow control — None
Baud rate — 9600
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The programmable bath can also be controlled directly from a DV-III Ultra Rheometer or a DV-III+
Rheometer (version 5.0) without using Rheocalc. Use an optional cable (DVP-207) connected from
the serial port on the Rheometer base to the RS232 serial port on the bath controller head. Please
see additional instructions with your Rheometer Operator Manual if you wish to use this mode.
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)(9'4&%$_!
Serial Connector — A 9-pin D-connector is provided on the back panel of the Controller for RS232
data communication. A serial cable that uses only the following pins should be used to connect the
Controller to the computer:
Pin #2 — data read (data from computer)
Pin #3 — data transmit (data to computer)
Pin #5 — Signal ground
IMPORTANT: Do not use a serial cable that connects to the unused pins on the Controller’s RS232
connector.
RS232 Protocol — The Controller uses the following RS232 protocol: