TB 9-6625-173-24
(4) Insert -5000 mV and repeat step (3) above. Reset Flag (1).
(5) Set Flag (2) true and set the calibrator for a 2500 mV into differential channel 1.
Record the reading to table 1 and verify specifications. If not within specifications perform
b below. Set the calibrator for a 0 V output and measure the offset voltage; record the
reading to table 1. Reset Flag (2).
(6) Set Flag (3) true and set the calibrator for a 250 mV into differential channel 1.
Record the reading to table 1 and verify specifications. If not within specifications perform
b below. Set the calibrator for a 0 V output and measure the offset voltage; record the
reading to table 1. Reset Flag (3).
(7) Set Flag (4) true and set the calibrator for a 25 mV into differential channel 1.
Record the reading to table 1 and verify specifications. If not within specifications perform
b below. Set the calibrator for a 0 V output and measure the offset voltage; record the
reading to table 1. Reset Flag (4).
(8) Set Flag (5) true and set the calibrator for a 7.5 mV into differential channel 1.
Record the reading to table 1 and verify specifications. If not within specifications perform
b below. Set the calibrator for a 0 V output and measure the offset voltage; record the
reading to table 1. Reset Flag (5).
(9) Set Flag (6) true and set the calibrator for a 2.5 mV into differential channel 1.
Record the reading to table 1 and verify specifications. If not within specifications perform
b below. Set the calibrator for a 0 V output and measure the offset voltage; record the
reading to table 1. Reset Flag (6).
(11)Set the calibrator for a -2.5 mV into differential channel 1. Record the reading
to table 1 and verify specifications. If not within specifications perform b below.
(12)In the TI status table, edit location FullMemReset with 98765 value to initiate a
full memory reset that tests SRAM and restores all factory default settings to the TI.
(13)Load original programs back onto TI.
b. Adjustments
(1) Remove TI bottom clamshell housing to gain access to the CPU/Measurement board.
(2) Connect the multimeter ground lead to analog ground next to EX1 on the panel
and the positive lead to test point R205 on the CPU board.
(3) Download test program Zero_DAC.CR1 and adjust R184 to 0.000 mV 0.01 mV
on the multimeter.
(4) Connect the multimeter positive lead to EX1 and verify excitation output is
0.000 mV 0.06 mV on the multimeter.
(5) Download test program 2V_DACadj.CR1 and adjust R155 so that the EX1
output reads + 2000 mV 0.5 mV.
(6) Download test program Neg2V_DACadj.CR1 and adjust R169 so that the EX1
output reads - 2000 mV 0.5 mV.
(7) Repeat paragraph 9 above.
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