Barnstead F62730 Operation Manual - page 25

25

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.

To Operate the Controller as a

Single Setpoint Controller

1.

Switch the circuit breaker to the “ON” position.

The setpoint temperature presently set in the

controller will appear in the lower display. (The

upper display indicates the actual chamber tem-

perature.)

2.

To change the setpoint, press the UP or DOWN

button until the desired setpoint value is dis-

played; then release the button.

3.

The furnace will begin to heat if the new setpoint

temperature is higher than the present chamber

temperature.

Programming the Controller

The controller is capable of varying temperature or

process value with time through programming. A program

is stored as a series of segments and can be run once,

repeated a set number of times or run continuously. To

create a customized program using the controller parame-

ters listed under “Controller Parameters” at the beginning

of this section, follow the procedures outlined in the pro-

ceeding sections of this manual.

8 S

EGMENT

P

ROGRAMMABLE

M

ODEL W

/OTP