Documenting Process Calibrator
Using Source Mode
works in SOURCE and in MEASURE/SOURCE modes. Proceed as follows to select a step size:
1.Refer to the appropriate heading earlier in this manual (e.g., “Sourcing Electrical Parameters”) and connect the calibrator to the circuit to be tested.
2.If necessary, press Mfor SOURCE mode.
3.Set the calibrator for the desired source value.
4.If you want to step the source value in % of scale, set the % of scale value as described previously under “Sourcing in Percent of Scale.”
5.Press the More Choices softkey.
6.Press the Step Size softkey.
7.Use the numeric keypad to enter the step size in the units shown on the display.
8.Press the Done softkey.
9.Now you can adjust the output in steps by pressing the uand dkeys.
Ramping the Output
Ramping is sweeping the source up or down in value. Use the ramp feature to check a limit switch or alarm, or any time you want a smoothly increasing or decreasing output function. You can set the calibrator to ramp up or down in engineering units (mV, V, mA,°C, etc.) or % of scale.
During ramping, the output is adjusted 4 times per second. The size of the steps is determined by your choices of endpoints and ramp time. For example, if you set the calibrator to ramp from 10 mV to 1V over 10 seconds, the output is adjusted in approximately 25 mV steps.
Ramping continues until the selected limit is reached, or until an optional trip condition is encountered. The optional trip detect works as follows: during ramping, the calibrator checks for either a 1V change in dc voltage or a change in continuity status (Open or Short) from one ¼ second interval to the next.
Proceed as follows to ramp (i.e., sweep the source):
1.Refer to the appropriate heading earlier in this manual (e.g., “Sourcing Electrical Parameters”)
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