Instruction manual

32
10. COMPARATOR FUNCTION
The AD-4532B has two comparator modes; simple comparator and 2D (Two dimensional)
comparator. A comparator mode can be selected in function mode f-16. f-17 to f-21 are also
comparator-related function modes.
The comparator function compares the measured value against the set value and outputs the
comparison results (HI, OK or LO) from the rear panel comparator output terminals.
10-1 Simple Comparator Mode
Compares the measured value against the upper or lower limit value and outputs the comparison
results from the rear panel comparator output terminals.
The operation of the simple comparator mode can be set using the parameters 0 to 3 of function
mode f-16.
10-1-1 Detailed description of the simple comparator mode
The relation between the output results and the output condition is as shown below:
Comparator output terminal Output condition
HI Upper limit < Measured value
OK
Lower limit ≤ Measured value ≤ Upper limit
LO Measured value < Lower limit
When function mode f-18 (COMP ON) is set to “0 (Not used)”, the comparator functions
according to the f-16 parameter setting (0 to 3).
When function mode f-18 (COMP ON) is set to “1 (Used)”, connect the COMP ON input terminal
to the IN COM terminal to enable the comparator.
The upper/lower limit values saved, even if the power is off, are maintained in non-volatile
memory.
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.