Greenlee CMT-90, Instruction Manual, Page: 8 / 44

8
Operation
2. Refer to “Typical Measurements” for specific measurement instructions.
3. Test the unit on a known functioning circuit or component of the type you
intend to measure.
• If the unit does not function as expected on a known functioning
circuit, replace the battery.
• If the unit still does not function as expected, send the unit to Greenlee
for repair. Refer to the instructions under the Warranty.
4. Take the reading from the circuit or component to be tested.
Note: Momentarily press the ON/OFF/HOLD button to hold the present
measurement on the display; momentarily press again to return to the normal
display mode. Press and hold to turn the unit off.
Priority Display Conditions
AC volts or Input at terminals is
1
DC volts, 1.3 to 999.9 VAC
whichever 1.8 to 999.9 VDC
is greater –0.6 to –999.9 VDC
Input at terminals is
Resistance 0 to
∞ Ω
2 and 0 to 0.9 VAC
continuity 0.2 to 1.4 VDC
–0.02 to –0.2 VDC
3 AC amps
AC current through jaw is
0.6 to 600.0 A
Electric shock hazard:
Contact with live circuits could result in severe
injury or death.
1. The meter automatically selects the proper measurement according to
the following table.