Sourcing Frequency - Extech Instruments PRC50 User Manual

5.3.3 mA% display
In the mA source mode, the preset value is displayed on the primary numerical display and the ma% is displayed on
the smaller secondary numerical display.
100 (current measured value mA-4mA)
mA % =
Note: Increment/decrement set is not available in mA% mode.
5.3.4 4-20 mA simulate transmitter source
Connect the calibrator and loop power as shown in Figure 7. Operate as described in the DC current Source section.

5.4 Sourcing Frequency

The calibrator can source a constant pulse signal responding to the preset frequency and amplitude.
Step 1: Using the〔FREQ〕key, select frequency source function. The LCD shows the default frequency value 10 Hz.
Step 2: Using the〔RANGE〕key, select a frequency range from 100Hz, 1KHz, 10KHz. The selected function, the default
range source value, and the unit will be shown on the LCD.
Step 3: Set the output value digit by digit using each pair of〔 〕/〔 〕output setting keys.
Each pair of〔 〕/〔 〕keys corresponds to each digit of the LCD reading. Each press of the〔 〕/〔 〕key increases
or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing
the output value to be set without interruption. Holding down the〔 〕/〔 〕key continuously changes the digit quickly.
The value won't change if it is increased or decreased to the Maximum or Minimum value.
Step 4: Pressing the〔Vpeak〕key once switches to amplitude setting mode. The LCD provides a reading of 1V.
Step 5: Set the output value digit by digit using each pair of〔 〕/〔 〕output setting keys.
Each pair of〔 〕/〔 〕keys corresponds to each digit of the LCD reading. Each press of the〔 〕/〔 〕key increases
or decreases the digit. Increasing the digit from 9 or decreasing it from 0 causes the digit to overflow or underflow, allowing
the output value to be set without interruption. Holding down the〔 〕/〔 〕key continuously changes the digit quickly.
The value won't change if it is increased or decreased to the Maximum or Minimum value.
16 mA
Figure 7 - 4-20 mA simulation transmitter source
%
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