Omron GRT1 - 11-2007 Operation Manual page 224

Temperature Input Units
Temperature Zone
Counter Function
(Zone Count)
6. To set the hysteresis value, input the desired value in the Hysteresis Field.
Note The hysteresis value set for the comparator function is also used by the
top/valley hold function.
7. To set the OFF delay function, input the desired value in the Comparator
Off Delay Field.
8. Return to the General Tab Page, click the Download Button, and then click
the Reset Button to reset the Unit.
9. Click the OK Button to exit.
This function times (in 1-second units) how long the temperature input value is
within a user-set temperature range. The zone count can indicate when pre-
ventative maintenance is required for devices or applications that deteriorate
at a fixed rate within the user-set temperature range.
Select the temperature zone settings in the Comparator Tab. The tempera-
ture zone boundaries are defined by the High High Limit (HH), High Limit (H),
Low Low Limit (LL), or Low Limit (L). Any threshold value can be set in the
Threshold Zone Counter to indicate when the threshold time within the zone
has been exceeded. Threshold status can be read in the Maintenance Infor-
mation Window.
Section 6-4
203