Second Programming Menu Level - Extech Instruments 48VTR User Manual

lock out 'A1SP', press the Scroll and down-arrow keys for 4 seconds. To unlock,
press Scroll and the up-arrow keys for 4 seconds.
timE Time setting for the Event/Soak Alarm Timers. The range is 0 to 9999 minutes.
Refer to the 'Event/Soak Timers' section and Appendices for details.
Note: The Parameter Lock (P-L) setting can prevent select menus and parameters,
from appearing on the display.

Second Programming Menu Level

Press and hold the Scroll and Return keys to enter the 2
normal operation at any time, press the Return key.
NOTE: The parameters below are automatically set by Auto Tune. Manual adjustment is
possible but severe process disturbances can result from incorrect settings, use caution.
Pb The Proportional Band is the main gain setting. The higher the setting, the lower the
gain, and the slower the reaction to process changes. The lower the setting, the
higher the gain, and the faster the reaction to process changes. Please refer to the
dedicated section on Proportional Band for full details.
The Pb setting range is 0.0 to 100.0% of 'span'. Span is calculated by subtracting the
Low Limit setting from the High Limit setting (3
Pb to 0.0% for ON/OFF control.
ti Integral (Reset). 0 to 3000 seconds setting range. Default = 240. This tuning
parameter is automatically set by Auto Tune. The lower the setting the more
responsive the controller is to slight offset between PV and SV (known as 'droop').
td Derivative (Rate). 0 to 3000 seconds setting range. Default = 40. This tuning
parameter is automatically set by Auto Tune. The lower the setting, the more often
the controller adjusts the output based on the rate of PV change.
nd
Level from the 1
rd
Menu). The Pb default = 10.0%. Set
13
st
Level. To return to
48VTR User Manual v6.0 10/1/20