which the current to be measured is flowing (observing current direction). If you have mistaken the direction of current
flow, the pointer will be deflected left of zero, in which case simply reverse the test leads.
d. Currents in either the 10 ma range or the 10 amp. range are measured with the RANGE switch in the 10MA-
10AMP. position. To use the 10 amp. range, insert the test leads in the pin jacks marked +10 AMP and -10 AMP,
taking
care to observe the direction of current flow.
e. DC currents are read on the black 0-10 and 0-50 scales marked D. C. When using the 10 ma and 10 ampere
ranges, read the 10 scale directly in ma and amperes, respectively. To obtain the indicated current on the 100 ma range,
multiply the reading on the 10 scale by 10 and read ma. Read the 0-50 scale directly for measurements made on the 50
ua scale. On the 500 ma scale, multiply the reading on the 50 scale by 10 and read in ma.
Resistance Measurement
a. Set the DC-AC-OUTPUT switch to the DC position.
b. If you are measuring a resistance less than 150 ohms, set the RANGE switch at the RX1 position. For a
resistance between 150 and 15,000 ohms, use the RXI00 position; and for s resistance above 15,000 ohms, use the
RX10K position.
c. Insert the test leads into the Jacks marked + (POSITIVE) and - COMMON.
d. To zero adjust on any range, short the test leads and rotate the ZERO OHMS knob until the meter pointer is set
directly over the zero of the top black scale marked OHMS.
e. Connect the test leads across the component whose resistance is to be measured. On the RX1 range, read the
scale directly in ohms, To obtain the indicated resistance in ohms on the RX100 and the RX10K ranges, multiply the
scale reading by 100 and 10,000, respectively.
Output Voltage Measurement
The instructions for output voltage measurement are the same u those for AC voltage measurement, with the exception
that the DC-AC-OUTPUT switch is set at the OUTPUT position.
Consideration should be given, however, to the effect of the blocking
capacitor when measuring on the 2.5V range at
frequencies less than 1000 Hz, the 10V range below 250 Hz, and the 50V range below 60 Hz. On these ranges, below
the frequencies given, the ratio of the reactance of the blocking capacitor to the multiplier resistance for the range is too
high to neglect the bleeding of the applied voltage by the blocking capacitor. The graph in figure 1 has been prepared
so that measurement can be made in these cases. The graph is used in the following way:
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