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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