7351 Series Digital Multimeter Operation Manual
5.9.1 NULL Calculation
5-18
5.9.1
NULL Calculation
1. Function
The NULL calculation subtracts the NULL constant from the measurement value and outputs the re-
sult.
Pressing the
key performs the calculation and turns on the NULL lamp in the display sec-
tion. When the
key is re-pressed while the NULL calculation is performed, the calculation
is canceled and the NULL lamp turns off.
CAUTION:
The actual measurement value is not displayed while the calculation is performed.
Remember that any hazardous voltage present on the input connector or test lead may not be
detected at this time.
2. NULL constant
The measurement value when the
key is pressed is determined as the NULL constant. The
NULL calculation cannot be performed when the overload (OL) occurs. The NULL constant can be
checked in
during the calculation.
The setting ranges are shown below.
The exponential part is set by using a unit prefix (p, n,
, m, k, M, G, T).
3. Changing the NULL constant
1. Display the NULL constant according to item 2 (previous description).
2. After pressing
, the blinking position of the following items, which can be
changed, is moved by using
and
.
• From the most significant digit to the least significant digit in the numeric
value
• Unit prefix (exponential part setting)
• Decimal point
Setting range
Minimum resolution
-999999.E +6 to +999999.E + 6
0.000000E -9
Measurement data output = Measurement value - NULL constant
NULL
NULL
NULL
MENU
MENU
..4.. CONST
NULL
