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422123 Datasheet(PDF) 5 Page - Extech Instruments Corporation. |
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422123 Datasheet(HTML) 5 Page - Extech Instruments Corporation. |
5 / 10 page V3.0 5/09 5 Advanced Functions Programming an Output in Percent (Current and Voltage Outputs Only) Output values can also be programmed in percent. For example, a 4 to 20mA output can be programmed as follows: 0% = 4mA, 50% = 12mA, and 100% = 20mA. The main LCD digits will reflect the actual output while the top (smaller) digits will display the percentage. Follow these steps to output a signal in percent: 1. Setup a test as described earlier for a current or voltage output. 2. Press the SHIFT button so that the word SHIFT appears on the LCD. 3. Press the % key. 4. Enter a percentage from 0 to 100% (1% resolution) using the numeric keys. 5. Press the ENTER key. 6. The current or voltage signal will be output from the meter. 7. 0% corresponds to the lowest value in the range ('4mA' for 4 to 20mA, '0mV' for 0 to 100mV, for example.) while 100% corresponds to the highest value in the output range ('20mA' for 4 to 20mA range, '100mV' for 0 to 100mV range). All percentages in between will be linear to the voltage or current ranges. 8. Refer to the list below for the 1% step value for each range: 4 to 20mA: 1% = 0.16mA 0 to 20mA: 1% = 0.2mA 0 to 24mA: 1% = 0.24mA 0 to 100mV: 1% = 1mV 0 to 1V: 1% = 0.01V 0 to 12V: 1% = 0.12V Step Mode (Current and Voltage Outputs Only) This feature allows the user to step up and down through the output range in programmed steps as follows: 1. Setup a test as described earlier for a current or voltage output. 2. Press the SHIFT key and then the % key. 3. Enter a percentage (1 to 100%) using the numeric keys. This percentage will represent the size of each step. Press the ENTER key when complete. 4. Now each time the '8 % ' key is pressed, the output signal will be increased by the percentage programmed (in the previous step). Press the '0 % ' key to step the output down by the percentage programmed. 5. For example, for a 4 to 20mA output type and a step percentage of 25%, the following steps are possible: 0% = 4mA 25% = 8mA 50% = 12mA 75% = 16mA 100% = 20mA |
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