The multimeter is an instrument that combines several measurement functions. To set the desired function, select the shape of the multimeter from those available.
When the multimeter is used as an ohmmeter to measure resistance, it behaves like a current source whose value can be set via the parameter IOHM. Is important that in the circuit there are no other generators or other ohmmeters. Since the simulator requires that each node has a DC path to ground, when using the ohmmeter is added, in automatic, a resistor between pin 1 of the instrument and the ground (GND).
The STARTEXPR and STOPEXPR parameters must be set when the meter functions as a chronometer. In expressions, you can use the START and STOP special variables. The START variable contains the value of the Start input voltage. The STOP variable contains the value of the Stop input voltage.
Parameters
| Parameter | Description | Units | Default |
|---|---|---|---|
| HOLD | Locks the measurement on the display. (off, min, max, avg) | OFF | |
| STARTEXPR | An expression that specifies the start condition of the chronometer. The count starts when the condition is true (the result of the expression is nonzero). | ||
| STOPEXPR | An expression that specifies the stop condition of the chronometer. The count is stopped when the condition is true (the result of the expression is nonzero). | ||
| WIDTH | Number of decimal places. (1..3) | 1 | |
| RESV | Value of the internal voltmeter and frequency meter resistance. The voltmeter is characterized by high internal resistance so as not to affect the circuit under test. | Ohms | 1e9 |
| RESA | Value of the internal ammeter resistance. The ammeter is characterized by a low internal resistance so as not to affect the circuit under test. | Ohms | 1e-3 |
| IOHM | Value of the internal ohmmeter current. | A | 1e-6 |