Power Commands - Fluke 6055 User Manual

9 Digital communication interface

Power commands

In Table 1, characters or data within brackets, "[" and "]", are optional for the
command. A slash, "/", denotes alternate characters or data. Numeric data, de-
noted by "n", may be entered in decimal or exponential notation. Characters are
shown in lower case although upper case may be used. Spaces may be added
within command strings and will simply be ignored. Backspace (BS, ASCII 8)
may be used to erase the previous character. A terminating CR is implied with
all commands.
9.4 Power commands
The digital interface is capable of controlling the heating functions so that the
bath can be remotely operated at any temperature within the range of the bath.
To allow the interface to control the heating, the front panel controls are dis-
abled by 1) switching the heater control to "OFF", and 2) switching the boost
heater switch to "OFF". Otherwise, the interface would not be able to switch
these functions off. The 6055 bath has five control functions with the digital in-
terface. These are controls for heaters 1, 2, 3, and 4, each 225 W, and the boost
heater which is 900 W. Heater 1 power could be varied with the DRIFT control
on the front panel. The boost heater should only be used for quickly heating the
bath up to a high temperature and not for controlling at a constant temperature.
Serial commands "F1" through "F5" control the heaters 1 through 4 and the
boost heater individually. These commands are used to turn the heaters on or
off or to read the states of the heaters. Sending a command with parameter "1"
turns the heater on. Parameter "0" turns the heater off. No parameter returns the
state, "1" for on or "0" for off. For example "F1=1"<RETURN> turns on
heater 1. "F1"<RETURN> (no parameter) will return "f1:1" or "f1:0" depend-
ing on whether heater 1 is on or off respectively.
Since unlike the front panel heater control, which turns on multiple heaters to
achieve the desired power level, the interface commands control the heaters in-
dividually, multiple commands must be issued to set the desired amount of
power. Table 2 lists the commands which should be given to set various power
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