SA5052 Digital Multimeter User ‟s Guide
Shijiazhuang Suin Instruments Co., Ltd. 30
Once find the maximum or minimum, multimeter beeps with the Min or Max annuiator
incicating (only if beep function is on) . If the reading has no change but device beeps, the
possibility is that the internal resolution of multimeter bigger than display resolution.
Front panel operation
：
Press
【
Min/MAX
】
key to excute operation.Then press
【
Config
】
+
【
Min/MAX
】
key and get down to parameter level to select suitable parameter by
【
<
】
or
【
>
】
key if you want to read the maximum, minimum, average and reading count.
●Press
【
Min/MAX
】
key again to disable the function.
●The stored values are cleared when you turn min-max off, turn off the power, or perform a
remote interface reset because the parameter settings are stored in volatile memory.
3.3.2 Null
When excuting null measurement, reading shows the difference between the input signal and
stored null value. Null function is used for offsetting the resistance of test lead to get more
accurate 2-wire resistance.
Result = Reading – Null value
Null can be set from 0 to 100% of full range.
Front panel operation
：
Press
【
NULL
】
key to excute null operation.Then press
【
Config
】
+
【
Null
】
key and get down to parameter level to select suitable parameter by
【
<
】
,
【
>
】
,
【∧】
or
【∨】
keys if you want to view or change null value.
●Press
【
Null
】
key again to disable the function.
●The stored values are cleared when you turn off the power, or perform a remote interface
reset because the parameter settings are stored in volatile memory.
3.3.3 dB
dB is the difference between the input signal and a stored relative voltage, with bothvalues
converted to dBm, the formular is:
dB = 20 × log(Vin/Vref
)
Vin
is input signal,
Vref
is relative reference voltage.
