HP WaterSkis E1312A, WaterSkis E1412A "0, OFF, OFF, OFF, ONCE, ONCE, ONCE, "3Hz, range, range, range, Chapter, function, function, function, function, resolution, resolution, zero reading

Autozero Autozero applies to dc voltage, dc current and 2-wire resistance measurements. The multimeter internally disconnects the input signal following each measurement and takes a zero reading when autozero is enabled. Autozero enabled is the default setting. It then subtracts the zero reading from the preceding reading. This prevents offset voltages present on the multimeter’s input circuitry from affecting measurement accuracy.

•When autozero is disabled (OFF), the multimeter takes one zero reading and subtracts it from all subsequent measurements. It takes a new zero reading each time you change function, range or integration time. You can disable autozero on dc voltage, dc current and 2-wire ohms measurements only (it is always disabled for ACV and ACI functions). Autozero is always enabled when you select 4-wire ohms or ratio measurements.

•The autozero mode is stored in volatile memory. The multimeter automatically enables autozero at power-on and after a module reset.

•Use the following command to disable autozero or select the ONCE parameter. The OFF and ONCE parameters have a similar effect. Autozero OFF does not perform a new zero measurement. Autozero ONCE performs an immediate zero measurement.

[SENSe:]ZERO:AUTO OFFONCEON

Ranging You can let the multimeter automatically select the range using autoranging or you can specify a range. If you specify an expected value for the signal you are measuring, the multimeter selects the range to accommodate the expected input signal and turns autoranging off. Specify a range for faster measurements to eliminate the autoranging time.

•The multimeter has autorange mode enabled at power-on and after a module reset.•Autorange thresholds:Down range at <10% of range.Up range at >120% of range.

•The multimeter will provide an overload indication by returning "9.90000000E+37" if the input signal is greater than the present range can measure and autoranging is disabled or at the maximum range setting.

•The multimeter uses one “range” for all inputs between 3Hz and 300kHz for the frequency and period functions. The multimeter determines an internal resolution based on a 3Hz signal. If you query the range, the multimeter will respond with "3Hz". Frequency and period measurements return "0" with no input signal applied.

•The specified range applies to the signal connected to the Input terminals for ratio measurements. Autoranging is automatically selected for reference voltage measurements on the Sense terminals.

•You can set the range using any of the following commands:

CONFigure:<function> <range>MINMAXDEF,<resolution>MINMAXDEF MEASure:<function>? <range>MINMAXDEF,<resolution>MINMAXDEF [SENSe:]<function>:RANGe <range>MINMAX [SENSe:]<function>:RANGe:AUTO OFFON

40 HP E1312A/E1412A Multimeter Application Information Chapter 2