Users manual
ET1260B and ET1260A
6 1/2 Digit Multimeter
30
Preset value can be adjusted and set as any value from 0 to 120% of the highest measurement
range in the current function, which is stored in volatile memory, and after cutting off power or
resetting remote interface or changing measurement function, the zero-digit value will be cleared
out.
There are two methods to configure
preset value
of relative operation.
1) In basic measurement interface, press the softkey of Relative (
), and multimeter will
automatically set the current measurement result as the
preset value
.
2) On basic measurement interface, press
(Relative) to enter “Relative value”
setting interface where edit
relative value
through direction keys, and unit is determined by the
current measurement function.
Press the softkey of Current value (
) to set the
Relative value
as the current reading.
Press the softkey of Default (
) to reset the
Relative value
to 0.
Press softkeys of On/Off (
/
) to start or stop relative operation, and after starting,
Relative
indication can be seen on the right side of main interface.
After setting, press the softkey of Exit (
) to go back to the former-layer interface.
3.2.2 dBm value measurement
dBm function is a logarithm expression, which is gained according to the contrast between the
power imposed to reference resistance and 1mV, and dBm measurement is only suitable for DC
voltage measurement and AC voltage measurement.
dBm = 10 x log10 (reading 2/reference resistance/1mW).
Reference resistance can be any value from 2Ω-8000Ω, which is set as 600Ω when leaving the
factory. Reference resistance value is stored in volatile memory, which will be cleared out after
cutting off power, resetting remote interface or changing measurement function.
Modify reference resistance value: Press
to enter setting interface, and press
direction keys to input needed reference resistance value, after which press .
3.2.3 dB value measurement.
Each dB measurement value refers to the difference between input signal and the stored relative
