Connection (a) Connection (b)
Note: When connecting all three test leads (eg Phase, Neutral and Earth) or the mains plug test lead, the voltage displayed is the high-
est of the three possible voltages.
On models with a dedicated mV range this is selected using the Mode
button to select mV mode.
4.2 Frequency measurement
.1 Automatically displayed when connecting to a live circuit as per 4.1 above
4.3 Phase rotation (Not MFT1710)
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
(The position of the right hand rotary range knob does not matter)
.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.
Normal rotation Reverse rotation
4.4 Leakage current measurement
Leakage current measurement uses the optional accessory current clamp (ICLAMP).
.1 On the MFT1720, MFT1730, set the primary range knob to clamp position
.
.2 Connect to ICLAMP (part no. ICLAMP) to the ICLAMP
socket on the MFT.
.3 Connect the clamp to the circuit conductor. The instrument will display the ac current flowing in the conductor.
4.5 Temperature measurement (not on MFT1710)
.1 Connect the thermocouple transducer to the L1 (+ve) and L2 (-ve) terminals
.2 Press the Mode
button to select ºC. (Pressing the mode button will cycle round the V, mV and ºC measurement
modes)
The display will show the temperature at the tip of the temperature probe.
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