IEC 30 Series - Page 37

SECTION 4
Table 4-2. Calibration and Performance Checks (Continued)
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Step Calibration
Control Setting
Test
Equipment
(Mode)
Procedure
15.5
DIAL CALIB:
Low (Cont'd)
4.
If F3 is more than
5% lower than F2 :
Loosen hex nut on pot
R210 and rotate pot
CCW. Remeasure F3'
5.
Repeat steps 15. 2,
15.3 and 15.4 until
F 3 =F 2 ±5%
15.6
SWEEP TIME
CAL.
MODE @ Cont Swp
WAVEFORM
@ Swp
SWP
TIME @ Ims
SWP
VERNIER @ Cal.
Counter-
Time
Interval
1.
Connect time inter-
val counter to TP29 via
10 Megohms <: 15 pf
probe.
2.
Measure time interval
between positive going
and negative going
transitions of TP29.
Adj. R288 for 1000
±5 us.
3. Set SWP Time @ 10 us.
Time interval (ramp
up) of 10 ±O. 2 us.
4. Check time intervals
of 100 us, 10 ms,
100 ms and 1 s
SWPTIME ranges for
proper reading ±3%.
15.7
100:1 Adj. SWP TIME @ lms
SWP VERN @ CCW stop
1.
Adj. R301 for time
interval of 115
±10
ms.
SWP TIME @ 1s
SWP VERN @ CCW stop
2.
Time interval shall be
between 105s and
130s.
15.8
SWP Base
Line
SWP TIME @ 10 us
SWP VERN @ Cal
SCOPE 1.
Connect Scope to TP27
via x10 probe.
SWP retrace not to over-
shoot DC Zero by more
than 20 mv .
4-11