TB 9-6625-2246-40
b. Adjustments. If an out-of-tolerance condition exists and, if not previously
completed, perform paragraphs 13 through 17 below and repeat paragraphs 8 and 9 above.
10. Dc Current
a. Performance Check
key and release
(1) Press FUNCTION/RANGE blue shift key then Reset/
Guard Open/To LO pushbutton to Open.
(2) Execute ACAL OHMS command by pressing keys as listed in (a) through (c) below:
(a) MENU Auto Cal.
(b) FUNCTION/RANGE Menu Scroll until ACAL OHMS is displayed.
(c) NUMERIC/USER 3458 then Enter.
NOTE
ACAL OHMS takes approximately 10 minutes to complete.
(3) Press keys as listed in (a) through (h) below:
FUNCTION/RANGE DCI.
(a)
FUNCTION/RANGE blue shift then MENU N/Offset Comp .
(b)
NUMERIC/USER 8 then Enter.
(c)
MENU NPLC.
(d)
NUMERIC/USER 100 then Enter.
(e)
MENU Trig.
(f)
FUNCTION/RANGE Menu Scroll until TRIG SGL is displayed.
(g)
NUMERIC/USER Enter.
(h)
or
A range and wait 5
(4) Press FUNCTION/RANGE Range
key to 100
minutes to allow range relays to thermally stabilize.
(5) Press MENU Trig key then NUMERIC/USER Enter key. TI will indicate
between -000.00095 and +000.00095 A.
(6) Repeat technique of (4) and (5) above using range settings and indications listed
in table 5.
Table 5. Offset Test
Test instrument
Range
Indications
settings
Min
Max
1
mA
-0.0000065 mA
+0.0000065 mA
10
mA
-00.000065
mA
+00.000065
mA
100
mA
-000.00065
mA
+000.00065
mA
1
A
-0.0000115 A
+0.0000115 A
(7) Press TI keys as listed in (a) through (c) below:
(a) MENU Trig.
