The PASCO Basic Electrometer is a quantitative electroscope, measuring the polarity and magnitude of charged objects. With almost infinite input resistance (1014 ohm), the Electrometer is a high-impedance voltmeter, draining almost no charge from the object it is measuring.
- Center-Zero Meter: Polarity is indicated directly.
- Switch-Selectable Ranges: 3, 10, 30 and 100 VDC. LED lights indicate the range in use.
- Zeroing Switch: Removes all charge from the input and brings the meter to zero.
- Automatic Shutoff: Turns off about 3 hours after turned on (or used in any way).
- Output Compatible with PASCO Interfaces: The interface cable included with the electrometer connects directly to an analog channel on a ScienceWorkshop interface, and connects to a PASPORT interface through an Analog Adapter. This enables the output signal from the electrometer to be recorded, displayed, and analyzed by the data acquisition software.
- Battery Operation: 4 “AA” cells included. Range indicator lights flash when batteries need to be replaced.
Five reasons to use an electrometer:
- Quantitative Readout: The linear scale is a major advantage of the Electrometer. While an electroscope is only roughly quantitative, the Electrometer produces readings to ±3%. Verify physical laws and to determine if relations are linear or exponential. The Electrometer allows the student to measure rather than just observe.
- Direct Polarity Indication: Where polarity distinction is required, the electroscope is inconvenient; a known reference charge must be used. The Electrometer, by contrast, directly indicates polarity on a center-zero meter.
- Adjustable Sensitivity: The full scale sensitivity of the Electrometer is adjustable. Unlike the electroscope where the experiment must be adjusted to the measuring instrument, the Electrometer adjusts to the experiment.
- High Sensitivity: Increases the variety and scope of electrostatics demonstrations. Many electrostatics demonstrations theoretically possible with an electroscope are difficult because of the 100,000 VDC and higher voltages required. Such voltages are difficult to work with and hard to measure.
- Large Display Capability: Although the unit is designed for small group use, the Electrometer may be connected easily (cable included) to a ScienceWorkshop Interface. With the use of DataStudio software, a meter display that fits the monitor can be produced.
- 1x Shielded input cable to connect the Electrometer to the Faraday Ice Pail or other source of charge
- 1x Grounding cable with clip
- 1x Interface cable
- 1x Instruction and experiment manual
|For use with PASPORT. 1x PASPORT Analog Adapter||PS-2158||$91|
|Faraday Ice Pail||ES-9042A||$82|
|Charge Producers and Proof Plane||ES-9057C||$41|
|Basic Variable Capacitor||ES-9079||$170|
|Basic Electrometer Manual||English - 386.19 KB|