TB 9-6625-2246-50
(14) After reading has settled, operate sensitivity box L and H switches and null
meter RANGE switch while using calibrator output adjustment control to obtain best
null on null meter 10 V range.
(15) Record final calibrator output voltage indication as 100 V reference.
(16) Up-range null meter and set dc voltage divider dials to .0100000.
(17) Set calibrator output to 100 times dc reference standard 10 V output test
report value.
(18) After reading has settled, operate sensitivity box L and H switches and null
meter RANGE switch while using calibrator output adjustment control to obtain best
null on null meter 10 V range.
(19) Record final calibrator output voltage indication as 1000 V reference.
(20) Up-range null meter and press calibrator RESET key.
(21) Disconnect dc reference standard, sensitivity box, and null meter from
equipment setup. Connect TI Input HI, LO, and Guard to dc voltage divider OUTPUT
terminals.
(22) Set dc voltage divider dials to .0100000.
(23) Press keys as listed in (a) through (c) below:
(a) MENU Trig.
(b) FUNCTION/RANGE Menu Scroll ⇓ until TRIG AUTO is displayed.
(c) NUMERIC/USER Enter.
(24) Set calibrator output to value recorded as 10 V reference in (11) above.
(25) Press FUNCTION/RANGE Range ⇓ key to 100 mV range. TI will indication
within 21.3 ppm of 0.01 times dc reference standard 10 V output test report value.
Example:
Dc reference standard 10 V output test report value = 10.000055
0.01 times dc reference standard 10 V output test report value = .10000055
Tolerance: .10000055 X .0000213 = .000002130011715
Tolerance rounded to 8 digits: 0.00000213
100 mV lower limit = .10000055 -.00000213 =
099.99842 mV
100 mV upper limit = .10000055 +.00000213 = 100.00268 mV
(26) Press FUNCTION/RANGE Range ⇑ key to 1 V range.
(27) Set dc voltage divider dials to .1000000. TI will indicate within 11.1 ppm of
0.1 times dc reference standard 10 V output test report value.
(28) Press FUNCTION/RANGE Range ⇑ key to 10 V range. TI will indicate
within 13.0 ppm of 0.1 times dc reference standard 10 V output test report value.
11