Barnstead F62730 Operation Manual - page 15
Alarms
The controller will flash an alarm message in the home
display if an alarm condition is detected.
2FSH: Measured value full scale high alarm.
IdHi: Measured value deviation high alarm.
S.br: Sensor break: check that sensor is connected
correctly.
L.br: Loop break: check that the heating circuits are
working properly.
Ld.F: Heater Circuit fault: indication of either an open or
short solid state relay, a blown fuse, missing supply or
open circuit heater.
Sensor Break Protection
This controller provides sensor break protection in the
event the thermocouple opens. If an open thermocouple
condition occurs, the digital display will blink “S.br” and
the power to the heating element will be shut OFF (Cycle
light will extinguish).
Over-Temperature Protection
(OTP)
The OTP will be in effect during any alarm condition when
the temperature of the furnace has deviated beyond the
limit. The “Deviation High” alarm is the only alarm value
which can be changed. To change it, press the SCROLL
button until “IdHi” appears on the display. Press the UP or
DOWN button to select the OTP value you desire. We
recommend a value of 20° above your working tempera-
ture to provide protection for your workload.
In addition to over-temperature protection, units contain-
ing a single setpoint controller w/OTP feature a mechani-
cal OTP relay device which disconnects power from the
elements in an alarm condition.
15
S
INGLE
S
ETPOINT
M
ODEL W
/OTP
Note
The following alarm messages are fac-
tory default settings and may vary if
you have changed the configuration of
your controller:
IDHi = 50°C
2FSH = 1025°C