Martel Electronics MC1200 - Manual (Page 16)

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4. Using Source Modes (Lower Display)
The calibrator can generate calibrated signals for testing and calibrating process instruments.
It can source voltages, currents, resistances, frequencies, pulses, and the electrical output of
RTD and thermocouple temperature sensors.
4.1 Setting 0% and 100% Output Parameters
To set the 0% and 100% points, use the following steps:
1. Select the lower display [LOWER] from Main Menu, and choose the desired primary
parameter.
2. Select output [OUT] from the input/output control, and enter the desired value. For
example select [VOLTS OUT].
3. Enter 5V with the keypad and press Enter.
4. Press any one of the four cursor control arrows to display the setpoint control menu.
5. Hold down the Function Key that corresponds to 0% [F1]. 0% will flash and the setpoint is
stored.
6. Repeat these steps, entering 20V and holding the Function Key that corresponds to 100%
[F3].
7. Use the 25% key to cycle 5 V and 20 V in 25% increments.
4.1-1 Stepping the current output
To use the 25% function with mA output, follow these steps:
1. Select the lower display from the Main Menu, and choose mA.
2. Use the 25% key to cycle between 4 mA and 20 mA in 25 % intervals.
4.2 Using the Automatic Output Functions
There are two automatic output functions, step and ramp. The selected function can be
turned on and off using the Output Home Menu. The Automatic Output Function parameters
can be set in the Auto Function Menu.
Parameters include:
1. Which auto function will be available (Step or Ramp).
2. The Auto Function Time, time between steps for step and time to get from over one limit
to the next for ramp.
The limits for the ramp and step functions are set to the 0% and 100% values. See Section
4.1 Setting 0% and 100% Output Parameters. Steps are in 25% increments from the 0% value
to the 100% value.
4.3 Sourcing mA
To source a current, follow these steps:
1. From the Main Menu select lower display [LOWER]. Choose [mA] from the primary
parameters.
2. Switch to input/output control, and select output [OUT].
3. Connect the leads to the mA terminals, as shown in Figure 10.
4. Enter the desired current using the keypad.