Comparator Function; High/Low Limit Comparator Function - KYOWA WGI-400A Instruction Manual

3-5 COMPARATOR FUNCTION

3-5-1 High/Low Limit Comparator Function

High/low limit comparator function is a function that compares the indicated value with the high/low limit value
and outputs the compared result. The result of comparison is obtained as open collector output from the rear
terminal board and is indicated on the [HIGH]/[OK]/[LOW] LEDs on the front panel. The hysteresis (Dead
zone) can be set in the set value.
1) Output and LED Display to High/Low Limit Comparison Conditions
• Regarding high limit comparator (HIGH), when the indicated value exceeds the higher limit value, the
higher limit output becomes ON.
On the contrary, when the indicated value lowers the 'higher limit value - hysteresis value,' the higher
limit output becomes OFF.
• Regarding low limit comparator (LOW), when the indicated value lowers the lower limit value, the lower
limit output becomes ON.
On the contrary, when the value exceeds the 'lower limit value + hysteresis value,' the lower limit output
becomes OFF.
For details, see the following figure.
High limit (HIGH)
Low limit (LOW)
High limit (HGH)
OK
Low limit (LOW)
2) Setting High/Low Limit
(1) Press the HIGH (or LOW) key for 2 seconds in the measuring mode. The current set value is indicated
and the highest order digit flickers.
At this time, the [HIGH] (or [LOW]) LED flickers.
(2) Select and move the flickering to the desired digit with the → key and change the numeric value with
the ↑ key.
(3) Then, press the SET key to determine the setting.
3) Setting Hysteresis
Set hysteresis width that turns OFF the once turned ON high/low comparator.
The hysteresis can be separately set for high and low limit comparators.
For how set the hysteresis, see the function selecting mode 'F-10.'
ON
ON
ON
ON
ON
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