Setting
the
Measurement
Conditions
4-5
IM 755601-01E
4
4.3 Using the Comparator Function
Explanation
Setting range of limit values (HI and LO values)
The limit value is set in terms of the deviation (%) from the reference value that was set
in section 4.3, “Changing the Range (Reference).”
Limit Value
Setting Range
When the percent limit is 9.99% When the percent limit is 99.9%
Applies to both LO, HI
-9.999% to 9.999% (755611)
-99.99% to 99.99% (755611)
-9.99% to 9.99% (755601)
-99.9% to 99.9% (755601)
However, LO
≤
HI
Note
If the values are set so that HI is less than LI, an error (815) occurs.
Selecting the percent limit
Percent limit refers to the display resolution when the measured values are handled in
terms of deviation (%).
Select the percent limit from the following two choices.
9.99%
99.9%
Note that depending on the selected percent limit, the range of limit values (LO and HI
values) varies as indicated in the above section “Setting range of limit values (HI and LO
values).”
Note
• Changing the percent limit initializes the limit values (HI and LO) to 0%.
• If the percent limit is changed from 9.99% to 99.9%, the reference value is rounded to the least
significant digit. However, if the limit mode is 9.99% and the reference value is between 0.0001
Ω
to 0.0004
Ω
, changing the limit mode to 99.9% changes the reference value to 0.001
Ω
.
Comparator function
The measured value is compared to the specified limit values (HI and LO) and the result
is indicated by turning ON the appropriate indicator.
The comparator result is also output from the handler interface.
The following comparison is made.
When the measured value > HI
: “HI” ( indicator) turns ON (red)
When the measured value < LO
: “LO” ( indicator) turns ON (red)
When the measured value is between LO and HI : “IN” ( indicator) turns ON (green)
“–OL–” (overrange),
: “HI” ( indicator) turns ON (red)
“–nC–” (contact check error),
“–CF–” (Abnormality detected in the test current)
Note
The comparator function is carried out using fractions with greater accuracy than those displayed.
