A&D AD-4531B, Инструкция по эксплуатации

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12. COMPARATOR FUNCTION
The comparator function compares the measured value against the set values and the
results are displayed by the LEDs. If the relay option is installed, it outputs the
comparison results (HI, OK or LO) from the rear panel relay output terminals.
12.1. Description of the comparator mode
The relation between the comparator outputs and the upper and lower limit values is
as shown below:
Comparison result Comparison condition
HI Upper limit < Measured value
OK Lower limit
≤
Measured value
≤
Upper limit
LO Measured value < Lower limit
* HI is output when the measured value exceeds the specified range in the positive
direction. LO is output when the measured value exceeds the specified range in the
negative direction.
Upper limit and lower limit values can be negative.
For example, if the upper limit value is -1000 and the lower limit value is -2000, HI is
output for the measured value of -500 and LO is output for the measured value of -2500.
Make sure that the upper limit value is greater than the lower limit value.
12.2. Setting the upper and lower limit values
Set the upper limit value (
f1-01
) and lower limit value (
f1-02
) as follows:
In the measurement mode, press the or key to enter the setting mode for
the upper or lower limit value.
In the upper or lower limit value setting mode, the AD-4531B blinks the
HI
or
LO
LED.
(The relay output is not affected.)
The set value is displayed. Set the value by operating the key.
Shift the blinking digit to the value to be changed.
Change the value of the blinking digit.
Change the polarity.
Save the setting and return to the measurement mode.
Cancel the setting and return to the measurement mode.
HI OK LO
Measurement mode
Measurement mode