Brookfield Temperature Controller, Model 106 - Manual (Page 19)

Brookfield Engineering Labs., Inc. Page 9 Manual No. M/02-207-C009
the external control of the Programmable Temperature Controller. This program executes a tem-
perature program from 100
° C to 200 ° C in 25 ° C increments. At each setpoint, the temperature is
maintained for a period of 10 minutes. The program can be readily adapted to include additional
temperature setpoints and different time periods.
NOTES:
1) Only setpoint temperatures may be sent to the Programmable Temperature Controller in
the external mode. It is up to the PC program to keep track of any desired hold times.
2) All previously stated temperature limits also apply to the external mode. However, the
only limits on a step hold time or on the number of steps to be executed are any that may
exist in the external device being used to program the Programmable Temperature Con-
troller.
3) All Programmable Temperature Controller front panel keys are disabled when the unit is
used in the external mode.
4) Every command sent to the Programmable Temperature Controller will be echoed back
as part of the controller’s response to the command received.
5) In the examples that follow do not enter the brackets ({}). CR indicates a carriage re-
turn (on a keyboard the Return or Enter key will produce a carriage return), and should
be used after each command. When the Programmable Temperature Controller sends a
command to the computer, it will be terminated by a carriage return. A carriage return
may cause a line feed on some terminals.
6) All sensed and setpoint temperatures sent to or received from the Programmable Tem-
perature Controller are formatted as a four digit integer number. Setpoint temperatures
being sent should first be multiplied by a factor of ten and expanded to four digits with
leading zeros if necessary. All temperatures (sensed or setpoint) being read from the
Programmable Temperature Controller should be divided by a factor of ten to obtain the
actual temperature.
The operator/user can develop a variety of programs for controlling the Programmable Tempera-
ture Controller via the RS-232C protocol to meet specific needs of the laboratory. The following
communication protocol can be used in any desired combination:
1) To read the current temperature, enter T {CR} at the external device.
The response from the Programmable Temperature Controller to the external device
will be:
T{tttt}{u}{s
t
}{CR}