Table of Contents
Advertisement
O
PERATION
Note
The holdback type only appears
when holdback has been selected for
the entire program.
22
to these parameters when the program is in the hold state
but permanent changes must be made in the reset state.
Follow the steps below to create or edit a program.
1.
Press the PAGE button until you reach the pro-
gram list (ProG LiSt).
2.
Press the SCROLL button until display reads,
"PrG.n."
3.
Press the UP or DOWN button to select a num-
ber for a new program or to edit an existing pro-
gram.
Holdback
Holdback consists of a value and a type. If the measured
value lags behind the setpoint by an undesirable amount
during a ramp or dwell, the holdback feature can be used
to freeze the program at its current state (the HOLD light
will flash). The amount of the actual temperature may
vary from the setpoint before the holdback takes effect.
The program will resume when the error comes within the
holdback value.
Holdback Type
The holdback type is set when creating a new program.
Any of the four different holdback types listed below may
be chosen:
OFF: holdback is disabled.
Lo (Deviation Low Holdback): holds the program back
when process variable deviates below the setpoint by
more than the holdback value.
Hi (Deviation High Holdback): holds the program back
when process variable deviates above the setpoint by
more than the holdback value.
bAnd (Deviation Band Holdback): combines the fea-
tures of the high and low deviation holdback in that it
holds the program back when the process variable devi-
ates above or below the setpoint by more than the hold-
back value.
Advertisement
Table of Contents
