Users manual
ET1260B and ET1260A
6 1/2 Digit Multimeter
29
Description:
Current value refers to measurement value under the current function
Samples refer to sum of measurement values collected till now after confirming that one
certain measurement function collects the first number.
Maximum value is the maximum value among all the existing sampling values.
Minimum value is the minimum value among all the existing sampling values.
Average value refers to the average value of all the existing sampling values.
Standard deviation refers to the standard deviation of all the existing sampling values.
dBm: dBm is a logarithm expression, which is gained according to the contrast between the
power imposed to reference resistance and 1mV. dBm = 10 x log10 (reading 2/reference
resistance/1mW).
dB: dB measurement refers to the difference between input signal and existing relative
value (the two are both converted to dBm). dB=reading in dBm-relative value in dBm.
The following table shows possible combination between math operation function and
measurement function, wherein each
●
represents one possible combination. If the selected
math operation can not be executed in the current measurement, the math operation function will
be automatically called off.
Voltage
Current
resistance
Frequency
Period
Continuity Diode
Ratio
Temperature
DC
AC
DC
AC
Two-
wire
Four-
wire
Relative
●
●
●
●
●
●
●
●
●
Limit
●
●
●
●
●
●
●
●
●
dB
●
●
dBm
●
●
●
3.2.1 Relative (zero) operation
When starting relative operation, the reading displayed on screen is the difference between actual
measurement value and
relative value
.
Reading value=actual measurement value-relative value
One of the relative measurement applications is to counteract test lead resistance to gain more
accurate two-wire resistance measurement.
Relative operation is suitable in all the measurement functions exclusive of continuity, diode and
ratio measurements.
