Sensor Break Protection; Over Temperature Protection (Otp) - Barnstead 30400 Operation Manual

S S M
INGLE ETPOINT ODELS W
16
/OTP

Sensor Break Protection

This controller provides sensor break protection in the
event the thermocouple opens. If an open thermocou-
ple 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 temperature to provide protection for your
workload.
In addition to over-temperature protection, units con-
taining a single setpoint controller w/OTP feature a
mechanical OTP relay device which disconnects power
from the elements in an alarm condition (only in fur-
naces with OTP relay). See models listed on front
page.