12206 Simpson, 12206 Datasheet - Page 6

• Manufacturer Part Number: 12206
• Description: Analog Multimeters 260-6XLM VOM LOW P
• Manufacturer: Simpson

Specifications of 12206

• Accuracy: +/- 2 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

NOTES:
6
4.9
4.9.1
4.9.2
Before making resistance measurements, remove all power to the circuit under
test. Discharge all capacitors.
The 260 has six resistance ranges. Two are low power ohms and the other four
are conventional ohm ranges powered by two batteries. The low power ohms
ranges are used for accurate and safe measurements of resistance in semicon-
ductor and integrated circuits. The low open-circuit voltage of 100 mV assures
that the circuit being measured will not be damaged or have its resistance affected
by conducting diodes. Depending on the range selected, the open-circuit voltage
for the conventional ohms ranges is 1.5V or 9V.
A single OHMS ADJ control is provided for all the resistance ranges. This control
compensates for variations in battery voltage and allows the user to zero the In-
strument prior to measuring resistance.
a.
b.
c.
d.
e.
NOTE: When the Instrument is not in use, never leave the range switch in the low
power ohms position because power is drawn continuously from the 1.5V battery.
a.
b.
c.
d.
e.
f.
g.
Resistance Measurement
Measuring Resistance: Low Power Ohms Ranges
Turn the range switch to the desired resistance range mark in blue. Turn the
function switch to either the -DC or +DC position.
Plug the black test lead into the -COMMON jack and the red test lead into the
+jack.
With the test leads separated, rotate the OHMS ADJ control to set the Instru-
ment pointer at infinity ( ), on the blue low power ohms arc. If the pointer
cannot be adjusted to infinity ( ), replace the 1.5V battery. Refer to para-
graph 5.2 for instructions.
Connect the test leads to the circuit whose resistance is to be measured.
Read the resistance on the blue arc and multiply it by the factor indicated on
the range switch.
Disconnect the test leads and return the range switch to the OFF/TRANSIT
position.
Measuring Resistance: Conventional Ohms Ranges
Turn the range switch to the desired range and the function switch to either
the +DC or -DC position.
Plug the black test lead into the -COMMON jack and the red test lead into the
+jack.
Connect the ends of the test leads to short-circuit the Instrument’s resistance
measuring circuit.
Rotate the OHMS ADJ control to set the Instrument pointer to 0 on the black
ohms arc. If the pointer cannot be adjusted to 0, replace the 1.5V battery.
Replace the 9V battery if the R X 10k range cannot be adjusted to full-scale
(zero ohms). For battery replacement, refer to paragraph 5.2.
Disconnect ends of test leads and connect to component being measured.
Read the resistance on the black ohms scale. Multiply the reading by the
factor indicated on the range switch.
Disconnect ends of test leads and return the range switch to the OFF/TRAN-
SIT position.
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