Amprobe CR50A Capacitance-Resistance-Meter - Manual (Page 6)

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Warnings and Precautions
• Do not exceed the maximum overload limits per function (see
specifications) nor the limits marked on the instrument itself.
• Inspect instrument, test leads and accessories before every
use. Do not use any damaged part.
• Never ground yourself when taking measurements.
• Do not touch exposed circuit elements or probe tips.
• Never replace a fuse with one of a different rating. Do not
operate instrument in an explosive atmosphere.
Overload Indication
Range overload is indicated by “1” in the display with
all other digits blanked. Select the next higher range
until a value is displayed. If overload condition still exists in the
highest range, the measured value is beyond the range of the
meter. Overload indication is normal in the OHMS range when
the leads are not connected to anything or when the measured
value is higher than the selected resistance range.
Preparation For Use - Unpacking
Your shipping carton should include the CR50A, one test lead set
(one black, one red), one pair of alligator clips, one 9V battery
(installed), one spare 0.1A/250V fuse (inside the case), a holster, a
warranty card and this manual. If any item is damaged or missing,
return to the place of purchase for an exchange.
Measuring Procedures
General: When connecting or disconnecting test leads to/from
a circuit, always first turn off power to device or circuit being
tested and discharge all capacitors.
Resistance Measurement (Fig -1-)
1. Turn off power to the resistance to be measured
and discharge any capacitors. Any voltage present
during a resistance measurement will cause inaccurate
readings.·Connect red test lead to +Rx Input (red) and black
test lead to -Rx Input.
2. Set Function/Range Switch to the desired Ω position.