Martel Electronics LC-110/H - Manual (Page 9)

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• Press MENU/EXIT to enter the main menu described in section 3.
• The text ‘Valve Test’ is shown in the lower center when the valve
test function has been enabled on the Setup Menu, section 4.3.
Valve test is described in more detail in section 5.2.
• The text ‘250 Ω’ text is shown in the lower right corner when the
HART resistor has been enabled on the Setup Menu, section 4.4.
2.2 Milliamp Simulate
In the mA Simulate mode the calibrator functions like a 2-wire
transmitter by controlling the loop current from an external power
supply. This function is a great way to test a loop with the transmitter
removed.
Figure 3 shows the main display and typical connections for this
mode.
MARTEL ELECTRONICS
LC-110H Precision Loop
Calibrator w/HART™
100%
25%
0%
MENU
EXIT
Simulate 0.00%
4.000mA
POWER SUPPLY
30 VDC MAX
(+)
(–)
4 to 20mA
4-20mA
INPUT DEVICE
(+)
(–)
Figure 3
• Press the knob to move the decade cursor.
• Rotate the knob to increment or decrement the output in steps
indicated by the selected decade.
• Use the 3 percent keys to directly set the output to preset values.
• Use the step/ramp key to select and stop these advanced modes
which are described in section 5.1. When automatic step or ramp
is active one of the following is shown in the lower left corner: