17
OPERATING MODE
1) Remove the instrument from its case.
2) Close switch V2 (see Figure 1, Configuration Procedure).
3) The default setting for a sensor break indication is an
overrange condition. If an underrange indication is
desired, set SH401 and CH401 according to the
following table:
SH401
CH401
SH401
CH401
1
0
4
H
S
1
0
4
H
C
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4) During the configuration procedure, if a
°
C readout
has been selected, use the provided label to cover
the
°
F.
°
C
5) Re-insert the instrument in its case.
6) Switch on power to the instrument.
The 3 digit dual display and 3 digit heat/cool model
show the measured value on the upper display and
the programmed setpoint on the lower display (this is
the “normal display mode”).
The “normal display mode” of the 3 digit deviation
bar model shows the measured value or the setpoint
value (the SP LED will be flashing). To change the
display, press the
▲
key.
Operating Key Functions
FUNC
= The new setting of the selected parameter
is stored and the next parameter is
displayed (in increasing order).
AT
= Starts and stops autotuning (press and hold
for 1.5 seconds).
▲
= Increases the setting of the selected
parameter.
▼
= Decreases the setting of the selected
parameter.
NOTE: A 10 second timeout is in effect during
parameter modification. If no key is pressed
for 10 seconds, the instrument automatically
reverts to the “normal display mode.” The last
parameter modified will not be stored unless the
FUNC key was pressed before the timeout.
Autotuning (Smart AT) Function
Autotuning is used to automatically optimize the control
action. To enable autotuning, press and hold the AT key
for more than 1.5 seconds while the instrument is in the
“normal display mode.” The AT LED will light or flash
according to the selected algorithm. With autotune
enabled, the control parameters (PB, TI, TD and rC) can
be displayed but not modified.
To disable autotuning, press and hold the AT key a
second time for more than 1.5 seconds. The instrument
maintains the actual set of control parameters but allows
parameter modification.
NOTES:
1) When ON/OFF control is programmed (PB = 0),
autotuning is disabled.
2) Autotune enable/disable can be protected by a safety
lock password (see P15 in the Configuration
Procedure).
Содержание Barber Colman 7SD
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