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reaches the new set-point. With the scan disabled the dry-well will heat or cool
at the maximum possible rate.
8.4.1 Scan Control
The scan is controlled with the scan on/off function that appears in the main
menu after the set-point function.
ScAn=OFF Scan function off
Press “UP” or “DOWN” to toggle the scan on or off.
ScAn=On Scan function on
Press “SET” to accept the present setting and continue.
S
Accept scan setting
8.4.2 Scan Rate
The next function in the main menu is the scan rate. The scan rate can be set
from .1 to 100 °C/min. The maximum scan rate however is actually limited by
the natural heating or cooling rate of the instrument. This is often less than 100
°C/min, especially when cooling.
The scan rate function appears in the main menu after the scan control function.
The scan rate units are in degrees per minute, degrees C or F depending on the
selected units.
Sr= 10.0
Scan rate in °C/min
Press“UP”or“DOWN”tochangethescanrate.
Sr= 2.0
New scan rate
Press “SET” to accept the new scan rate and continue.
S
Accept scan rate
8.5 Temperature Display Hold
The instrument has a display hold function which allows action of an external
switch to freeze the displayed temperature and stop the set-point from scan
-
ning. This is useful for testing thermal switches and cut-outs. This section ex
-
plains the functions available for operating the temperature hold feature. An
example follows showing how to set up and use the hold feature to test a
switch.
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8 Controller Operation