Teledyne 7500 - Infrared gas analyzer - operating manual - Manual (Page 42)

42 Model 7500 Instruction Manual
Teledyne Analytical Instruments
6.3.2 Hysteresis setting
To prevent chattering of an alarm output near the alarm
setting values, set hysteresis.
1. In the “Alarm Setting CH Selection” screen that
appears, point the cursor to “Hysteresis” by pressing the
UP or DOWN key. Press the ENT key.
2. In the “Hysteresis Value Setting” screen that appears,
enter hysteresis values. For the value entry, 1-digit value
is increased or decreased by pressing the UP or DOWN
key, and pressing the RIGHT key moves the digit. After
setting, press the ENT key to carry out hysteresis.
To close Hysteresis Setting
To close the “Hysteresis Setting” or cancel the mode
midway, press the ESC key. A previous screen will
return.
Setting range
0 to 20% of full scale
A full scale means each range provides a full scale of
width.
Caution
The hysteresis is common to all CHs (components).
Hysteresis
If hysteresis values exceed the upper limit value as
shown in graph, an alarm output is provided. Once the
alarm output is turned ON, it remains ON until the value
falls below the set lower limit of the hysteresis indication.