Barnstead International Thermolyne 859 Series, Service Manual

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Displayed Letters/Numbers
“IN Ac” = Inactivity Mode. This mode is part of the timer,
which allows the unit to automatically turn on and heat to
set point temperatures. “IN Ac” will be displayed if the
user does not press any keys for a period of four hours if
the timer is set. Customer must press the start/stop key
to return to the idle mode. Hidden Key TIME will also
cause “IN Ac” to be displayed.
“PRN” = Printer. “PRN” will be displayed in the Chamber
Temp window. On or Off will be displayed in the percent
loss window to indicate if the printer is to print the header
and footer of tests or minute by minute test results.
Hidden Key 1 toggles the “PRN” On or Off.
Hidden Key ENTER will also cause “PRN” to be dis-
played.
“DEF” = Default. “DEF” is displayed for 3 seconds in the
Chamber Temp window to indicate the variables have
been set back to factory default. Variables affected are
chamber temperature (538C), filter temperature (750C),
and stability threshold (.02%). Hidden Key 2 reset vari-
ables back to factory default.
“CHBR CAL” = Chamber Calibration. “CHBR CAL” will be
displayed in the Percent Loss window and Elapsed Time
window. Hidden Key 3 will cause “CHBR CAL” to be dis-
played.
“BAL” = Balance. “BAL” will be displayed in the Chamber
Temp window. Hidden Key 4 will cause “BAL” to be dis-
played.
“FIL” = Filter. “FIL” will be displayed in the Elapsed Time
window. Hidden Key 5 will cause “FIL” to be displayed.
“ERR” = Error. “ERR” will be displayed in the Chamber
Temp window. Hidden Key 6 will cause “ERR” to be dis-
played.
“SPC” or “SPn” = Serial Port Output. “SPC” or “SPn” will
be displayed in the Chamber Temp window for 3 seconds.
Hidden Key 8 will cause “SPC” or “SPn” to be displayed.
“BEEP” = Beep. “BEEP” will be displayed in the
Chamber Temp window. Hidden Key 9 will cause “BEEP”
to be displayed.
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