TB 9-6625-2271-40
NOTE
As offset self-calibration is being performed, verify no error
codes are displayed on TI.
k. Connect calibrator OUTPUT HI and LO to TI INPUT HIGH and LOW using
balanced cable.
l.
Set calibrator for a 3 V dc output.
m. Press SPCL key and enter 24 ENTER using DATA ENTRY keys. Allow sufficient
time for dc calibration to complete before continuing.
NOTE
As self-calibration is being performed, verify no error codes are
displayed on TI.
n. Set calibrator output to standby.
8. Dc Measurement Accuracy
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to TI INPUT HIGH and LOW using
balanced cable.
(2) Press keys as listed in (a) through (c) below:
(a) LCL INIT.
(b) INPUT FLOAT (assure illumination).
(c) FILTERS DC.
(3) If TI does not indicate between -0.003 and 0.003 V perform b below.
(4) Set calibrator for a 3 V dc output. TI will indicate between 2.97 and 3.03 V.
(5) Repeat technique of (4) above using calibrator output settings and TI indications
listed in table 3 below.
Table 3. Dc Measurement
Calibrator output
Test instrument indications
settings
(V)
(V dc)
Min
Max
30
29.7
30.3
300
297
303
-300
-303
-297
-30
-30.3
-29.7
-3
-3.03
-2.97
b. Adjustments. No specific dc input adjustments can be made; however,
misalignment of balance adjustments located after ac measurement accuracy can adversely
affect this parameter.
