![YOKOGAWA TA320 Скачать руководство пользователя страница 122](http://html.mh-extra.com/html/yokogawa/ta320/ta320_user-manual_911358122.webp)
11-10
IM 704210-01E
Testing method
• Wait for 30 minutes after the TA320 is turned ON.
• This test compares the input DC voltage to the trigger level set on the TA320, to test the trigger
level tolerance.
• The trigger level is observed by monitoring the input indicator of the TA320.
Testing procedure
1.
Connect the output of DC voltage generator (7651) to the CHA of the TA320.
2.
Set the output level of the 7651 to 4.000 V.
3.
Set the trigger level of the TA320 to 4.100 V.
4.
Set the TA320 ready for measurement.
5.
Decrease the trigger level in steps of 5 mV slowly. When the input indicator lights up,
record the trigger level as VL.
6.
Set the trigger level to 3.900 V.
7.
Increase the trigger level in steps of 5 mV slowly. When the input indicator lights up, record
the trigger level as VH.
8.
Calculate the mean value of the VL and VH, and check that the mean value is within the
allowable range.
VTRIG = (VL + VH) / 2
9.
Set the output of the 7651 to 2.000 C, 0 V, –2.000 V and –4.000 V at a time, and carry out
the same test.
10. Repeat steps 1 to 9 for the channel CHB.
Test results
• CHA
Output voltage (7651)
VL
VH
VTRIGAllowable Range
4.000V
3.83V to 4.17V
2.000V
1.91V to 2.09V
0.000V
–0.01V to 0.01V
–2.000V
–2.09V to –1.91V
–4.000V
–4.17V to –3.83V
• CHB
Output voltage (7651)
VL
VH
VTRIGAllowable Range
4.000V
3.83V to 4.17V
2.000V
1.91V to 2.09V
0.000V
–0.01V to 0.01V
–2.000V
–2.09V to –1.91V
– 4.000V
–4.17V to –3.83V
11.6 Carrying out the Performance Test