Martel Electronics LC-110/H - Manual (Page 22)

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Rotate the knob to move the reverse video highlight to the desired
selection. Press the knob to change the mode to the highlighted
selection and return to the Setup and Selection display in section 6.2.
Press MENU/EXIT to restore the previous selection and return to the
Setup and Selection display in section 6.2.
In “mA Measure” mode the LC-110H is in circuit and loop power is
supplied externally as shown in section 6.1.1.
In “mA Measure with 24V” mode the LC-110H is in circuit and the
loop power is supplied by the LC-110H as shown in 6.1.2.
In “Communicator Only” mode the LC-110H is across the circuit and
the loop power is supplied externally as shown in 6.1.3. The 250
Ω
Resistor selection will default to “n/a”.
6.2.2 Select 250 Ω Resistor
250 Ω Resistor
OFF ON
Rotate the knob to move the reverse video highlight to the desired
selection. Press the knob to change the resistor to the highlighted
selection and return to the Setup and Selection display in section 6.2.
Press MENU/EXIT to restore the previous selection and return to the
Setup and Selection display in section 6.2.