Bnc 1201 - 6 1/2 Digit Digital Multimeter Manuel d'utilisateur télécharger pdf (Page 54)

4.1.2 Filter

Filter is used to remove noises in measurement readings. 1201 is

equipped with two types of filters: AC filter and digital filter. AC filter is

for AC measurements only. It also affects the speed of the multimeter

to yield a measurement reading. Digital filter further stabilizes the

measurement readings by averaging. Both of them are described in

detail in the subsequent sections respectively.

4.1.2.1 AC Filter

Definition:

User is allowed to set the bandwidth for selecting one of the three AC

filters (Slow, Medium and Fast), in order to achieve either higher

accuracy in low frequency measurements or faster AC settling time.

Defaults

The factory default is 20 Hz (Medium). Users can select their filter type as

they wish when setting bandwidth value. The selection is stored in a

volatile memory and the default setting will be restored when the meter

is power-off.

Bandwidth AC Filter

Time

( seconds per reading)

3 Hz ~ 300 KHz Slow 7

20 Hz ~ 300 KHz Medium 1

200 Hz ~ 300 KHz Fast 0.1

Table 4-2

How to set AC Filter in AC measurements:

User can set the AC Filter either through the front panel operation or

through the remote interface operation.

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Bnc 1201 - 6 1/2 Digit Digital Multimeter Manuel d'utilisateur Page 54