TB 9-4931-702-50
If null detector indication is not within 1
(17) Operate sensitivity switch.
microvolt of null, perform b(2) below.
(18) Open sensitivity switch.
(19) Set voltage divider to 1.0190000.
(20) Set TI supply No. 1 function switch to 1.019 +∆E.
If null detector indication is not within 1
(21) Operate sensitivity switch.
microvolt of null, perform b(3) below.
(22) Open sensitivity switch.
(23) Set voltage divider to 1.0199990.
(24) Set TI supply No. 1 ∆E control to 999.
(25) Operate sensitivity switch.
If null detector indication is not within 1
microvolt of null, perform b(4) below.
(26) Open sensitivity switch.
(27) Set voltage divider to .0009990.
(28) Set TI supply No. 1 function switch to ∆E.
(29) Operate sensitivity switch.
If null detector indication is not within 1
microvolt of null, perform b(5) below.
(30) Open sensitivity switch.
(31) Repeat technique of (1) through (30) above for supplies 2, 3, and 4.
(32) Connect equipment as shown in figure 1.
(33) Set TI supply No. function switch and ∆E control for output equal to standard
cell (A3) certified value.
(34) Operate sensitivity switch.
If null detector indication is not within 1
microvolt of null, perform b(6) below.
(35) Open sensitivity switch.
(36) Repeat technique of (33) through (35) above for supplies No. 2, 3, and 4.
