2002 Keithley Multimeter
The 2002 is a 8.5 digit bench multimeter from Keithley. A multimeter is an instrument used to test and measure alternating current (AC) or direct current (DC) voltage, resistance, and electric current. Multimeters combine voltmeters, ammeters, and ohmmeters. Electricians use multimeters to run diagnostics on batteries, switches, components, power sources, and motors.
- True 8-1/2 digit resolution
- Exceptional measurement integrity with high speed
- Broad range of built-in measurement functions
- High speed function and range changing
- Multiple measurement display
- Built-in 10 channel scanner option
- IEEE-488.2 and SCPI compatible
- HP 3458A emulation mode
- Accessories supplied: Model 8605 High Performance Modular Test Leads, user’s manual, option slot cover, and full calibration data.
The Keithley 2002 offers 8 ½ -digit resolution and basic DCV accuracy of 0.0018%, offering exceptional resolution, accuracy, and sensitivity. This high performance digital multimeter not only delivers performance specifications usually associated only with instruments that cost thousands more, but it also offers a broad range of functions not typically available in DMMs. For greater flexibility, a built-in card slot on the rear panel allows an additional multiplexer card for multi-point measurement applications.
True 7½- (or 8½-) Digit Resolution
While other DMMs may claim 7½- or 8½-digit resolution, they must average multiple readings to extend their resolution. The resolution specifications of the 2001 and 2002 are based on a 28-bit A/D converter that provides the resolution needed to discern smaller changes. This higher resolution also provides greater dynamic range, making it possible to measure from 1µV to 20V on a single range, thus avoiding range-shift errors and delays.
Built-In Scanner (Multiplexer) Options
With the addition of a plug-in scanner card, the 2001 or 2002 becomes a complete scan and measure system for applications involving up to ten measurement points. The additional resolution and measurement ranges provided by the 2002 make it an excellent choice for production test, design verification, and metrology applications where high accuracy is critical.
High Accuracy ACV Measurements
A patented circuit design makes the 2001 and 2002’s AC measurements several times more accurate than competitive DMMs. In this circuit, the signal bypasses the prime error-contributing section of conventional rms converters. This increases the accuracy at almost any voltage level, and also increases sensitivity down to a guaranteed 1% of the selected range, compared to 5–10% for most other DMMs. The result is highly accurate measurements over a broad range of inputs. Applications involving vibration, servo, guidance, shock, and control systems often require accurate low frequency ACV measurements. The 2001 and 2002 maintain very good accuracy (better than 0.1%) down to 1Hz. The wide bandwidth of these DMMs allows for accurate measurements of high frequency AC signals without the need for a special AC meter. Both the 2001 and 2002 feature TRMS AC, average AC, peak AC, AC+DC, and crest factor measurement capability for a wide variety of applications.
High Speed for High Throughput
In applications where high throughput is critical, both the 2001 and 2002 provide more than 2000 readings per second at 4½-digit resolution. At 7½ digits, the 2002 maintains full rated accuracy at reading rates up to 44/second on DCV and ohms.
High Speed, High Precision Resistance Measurements
The Model 2002 uses a unique single-phase method for 4-wire ohms measurements. This makes it twice as fast for a given power line cycle rate. This also eliminates errors due to changing lead resistances that can result from fast test handlers. A built-in open-lead detection circuit also eliminates many production test problems.
Fast, Flexible Triggering
Trigger latency—the delay between trigger and measurement—is often a barrier to higher throughput. Also, variability in latency can complicate predicting measurement timing. The 2001 and 2002 trigger is less than 2µs±1µs, which is much faster than typical system DMMs.