Operating instructions

ACCEPTANCE TESTING
5-40 46882-311D
Results table 5-26 Audio voltmeter accuracy
Frequency DVM
reading
(mV)
UUT
coupling
UUT
lower limit
*
(mV) ‡
UUT
upper limit
*
(mV) †
Result
1 kHz 30 AC 25.1 34.9 _______
1 kHz 200 AC 189 211 _______
1 kHz 400 AC 381 419 _______
1 kHz 800 AC 765 835 _______
1 kHz 2000 AC 1917 2083 _______
1 kHz 4500 AC 3317 4683 _______
50 Hz 1000 AC 957 1043 _______
100 Hz 1000 AC 957 1043 _______
500 Hz 1000 AC 957 1043 _______
10 kHz 1000 AC 957 1043 _______
30 kHz 1000 AC 957 1043 _______
50 kHz 1000 AC 957 1043 _______
DC 25000 DC 23997 26003 _______
DC 50000 DC 47997 52003 _______
† The upper and lower limits in the above table are calculated on the assumption that it was possible to set the
exact level. If it is not possible to achieve this, the limits will need to be calculated for the DVM reading
obtained.
Results table 5-27 Oscilloscope accuracy
LF generator
level (mV RMS)
UUT
(Volts/div)
DVM
lower limit
DVM
upper limit
Result
21.2 10 mV/div 20.15 22.27 _______
42.4 20 mV/div 40.3 44.54 _______
106 50 mV/div 100.7 111.4 _______
212 100 mV/div 201.5 222.7 _______
424 200 mV/div 403.0 445.4 _______
1061 500 mV/div 1007.5 1113.5 _______
2121 1 V/div 2.015 2.227 _______
4242 2 V/div 4.030 4.454 _______
DC supply
20 V 5 V/div 18.5 V 21.5 V _______
20 V 10 V/div 17 V 23 V _______
20 V 20 V/div 14 V 26 V _______