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15
Operation
Frequency measurement
Automatically displayed when connecting to a live circuit refer to “Making a voltage measurement” on page 14
Phase rotation
Display of Phase rotation is automatic when all three test leads are connected to the 3 phase supply as below:
1. Set the main rotary range knob to volts
V
(The position of the right hand rotary range knob must not be in the
position.)
2. Using three test leads, connect test leads to the L1 to Phase1, L2 to Phase 2 and L3 to Phase 3. The MFT will
display L1 L2 L3 or L1 L3 L2 depending on the direction of phase rotation.
L1
L2
L3
Normal
rotation
Reverse
rotation
Leakage current measurement
Leakage current measurement uses the optional accessory current clamp
(Megger Current Clamp).
1. On the MFT70, set the primary range knob to clamp position
.
2. Connect to Megger Current Clamp (part number MCC1010) to the Megger Current Clamp
socket on
the MFT.
3. Connect the clamp to the circuit conductor. The MFT will display the (AC) current flowing in the conductor.
Temperature measurement
1. Connect the thermocouple transducer to the L1 (+ve) and L2 (-ve) terminals.
2. Press the Mode
button to select º C. (Pressing the mode button will cycle round the V, mV and º C
measurement modes.)
The display will show the temperature at the tip of the temperature probe.
Switch probe
In the V / mV / º C mode all measurements except temperature can be made with the remote switch probe. Tests
are automatic and do not require the test button to be pressed.
Connect the switch probe to the switch probe socket. The probe replaces the standard RED test lead and can
now be used as a normal test probe.
L1
L2
L3
N
E
