Hewlett-Packard 5890 II Manual

A SERVICE OF

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Temperature Control

45

Note that the ACTUAL value is a measured quantity, while the

SETPOINT value is user•defined:in this example, the setpoint value for

oven temperature might recently have been changed from 250 to 350

C,

and the oven is now heating to the new setpoint. Given sufficient time for

equilibration, ACTUAL and SETPOINT values become equal.

In addition to keys

0

through

9

,

-

,

.

,

CLEAR

, and

ENTER

used in

defining setpoint values,

ON

,

OFF

,

A

, and

B

are used in certain

specific key sequences:

ON

and

OFF

add convenience in being able to switch on or off the

oven, and/or heated zones, without losing their current setpoint

values.

A

and

B

are used in key sequences defining a multiple•rampoven

temperature program:

A

as part of key sequences defining

parameters for the second ramp;

B

as part of key sequences

defining parameters for the third ramp.