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T .O . 33K8-4-551-1
4 .1 .19 Multiply the certified DC Reference Standard 10V output by the value listed in the DC Divider column of
Table 4 . The Calculated Value is referenced in Table 4 . The TI must indicate within the corresponding values listed in
the Limits column of Table 4.
4 .1 .20 Repeat steps 4.1 .18 and 4 .1 .19 for each remaining value listed in Table 4.
Table 4.
Limits (µV DC)
Range
DC Divider
Applied (VDC)
Standard
Opt 002
10 VDC
.2000000
2 .0
Calculated Value ±18
Calculated Value ±11
.4000000
4 .0
Calculated Value ±35
Calculated Value ±19
.6000000
6 .0
Calculated Value ±51
Calculated Value ±28
.8000000
8 .0
Calculated Value ±67
Calculated Value 136
4 .1 .21 Reverse the leads at the DC Reference Standard 10V Output and repeat steps 4 .1 .18 through 4 .1 .20.
4 .1 .22 Disconnect the test setup.
4 .2 RESISTANCE CALIBRATION:
4 .2 .1 Perform ACAL OHMS on the TI before beginning calibration by pressing the TI keys in the following
sequence :
, use the menu scroll keys
until ACAL OHMS is displayed, then
cal
or
(omne)
3
4
5
8
Enter
4 .2 .2 Set the TI for OHMF, 8 digit display and NPLC at 100 by pressing the TI keys in the following sequence:
(sHR)
(Blue)
OHMF
(919
(Blue)
N
8
Enter
NPLC
1
o
o
Enter
4 .2 .3 Press TI Offset Comp (S2) switch to ON and add a 1 s settling delay by pressing the TI keys
c
(sin)
(BLUE)
in the following sequence :
, use the menu scroll key
until DELAY is displayed,
Enter
then
4 .2 .4 Connect a low thermal short (12 to 14 Gauge solid copper wire) across the TI Input and S2 Sense HI and LO
terminals, allow 5 minutes for stabilization.
4 .2 .5 Set the TI to the 10 SI Range.
4 .2 .6 The TI display must indicate within ±00 .00005 S2.
4.2 .7 Disconnect the low thermal short from the four TI Input terminals.
21
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