TB 9-4920-451-24
11. Resistance Measurement Calibration
a. Performance Check
(1) Set switches as listed in (a) through (c) below:
(a) MODE SELECT to MEG.
(b) MEGOHMMETER SELECT to EXT.
(c) S8 switch (fig. 1) to IN.
(2) If MEGOHMS meter does not indicate value stamped above S8 switch (fig. 1),
perform b(1) below.
(4) If MEGOHMS meter does not indicate value stamped above S9 switch (fig. 1),
perform b(2) below.
(5) Set S9 switch (fig.1) to OUT position.
(6) Set MEGOHMMETER SELECT switch to LOZ GND.
(7) C o n n e c t a p p r o p r i a t e r e s i s t a n c e s t a n d a r d N o . 1 t h r o u g h N o . 5 t o T O
PROBES terminals, as shown in table 5.
MEGOHMS meter will
(8) Measure each resistance standard listed in table 6.
indicate within limits specified.
Table 5. Resistance
MEGOHMMETER
Actual
Connection
SELECT
standard
TO PROBES
value
switch
value (M)
terminals
+1 div
positions
LOZ GND
LOZ TO RESISTOR TO
1.0
GND
10
-4 div
100
1000
LOZ COMP GND
LOZ COMP TO RESISTOR
1.0
TO GROUND
10
---
100
1000
HIZ GND
HIZ TO RESISTOR TO
1.0
GROUND
10
---
100
1000
LOZ-LOZ COMP
LOZ TO RESISTOR TO
1.0
LOZ COMP
10
---
100
1000
LOZ-HIZ
LOZ TO RESISTOR TO HIZ
1.0
10
---
100
1000
LOZ COMP-HIZ
LOZ COMP TO RESISTOR
1.0
TO HIZ
10
---
100
1000
EXT
ACROSS EXTERNAL
1.0
RESISTANCE TERMINALS
10
---
100
1000
