TB 9-6625-133-40
(8) Allow measurement to stabilize, then record TI indication in table 5.
CTUAL - NOMINAL
,
ERROR ppm = A
,
(9) Calculate TI error using the formula below.
NOMINAL
Where:
ACTUAL= TI indication.
NOMINAL = True applied voltage
(10) TI will indicate within the limits of table 5 if not, perform b below.
(11) Repeat technique of (6) through (10) above for remaining rows in table 5. TI will
indicate within the limits of table 5.
(12) Set calibrator output to minimum and disconnect equipment set-up.
b. Adjustments. Complete all performance checks in the entire procedure noting AS
FOUND failures. Use paragraph 15 c for adjustments.
11. Resistance
a. Performance Check
NOTE
High-resistance measurements (typically >1 MΩ) can be
erratic, unstable, and slow to settle. These measurements are
very sensitive to environmental noise such as power line or RF
pick up and changes in electrostatic fields caused by people
moving nearby. If erratic or unstable measurements are
observed, move away from the measurement and stop all
disturbances, such as personnel movements, drafts, opening
and closing of doors, etc. Allow ample time for measurement to
settle. TI LoI mode is particularly slow to settle.
(1) Prepare TI for zeroing all ranges by connecting equipment as shown in figure 3.
Figure 3. Zero Resistance Connection.