Keithley 602 Analog multimeter
Manufacturer:
Model:
602
Date:
1983
Category:
Group:
Description:
Solid-State Electrometer

Information

INTRODUCTION The Keithley model 602 Electrometer is a completely solid-state, battery operated instrument, which measures a wide range of DC voltage, current, resistance and charge. The Model 602's input resistance of greater than 1014£] is the result of extensive instrument development with high input impedance transistors. The model 602 has all the capabilities of conventional VTVMs, but can also make more measurements without loading circuits. The model 602 has nine voltage ranges from 0.001 V full scale to 10V, 28 current ranges from 10⁻¹⁴A full scale to 0.3A, 23 linear resistance ranges from 100Ω full scale to 10¹³Ω, and 15 charge ranges from 10⁻¹³C full scale to 10⁻⁶C. The model 602 offers complete line isolation and excellent off-ground measuring capability. Up to 1500V may be applied between the input low terminal and the case, and stage operation is assured with the case grounded. A triaxial connector allows complete guarding of the high impedance input terminal. The model 602 employs matched insulated-gate field-effect transistors followed by transistor differential Amplifier stages and a complimentary-output stage. A large amount of negative feedback is used for stability and accuracy. model 602 FEATURES 1. The model 602 has excellent zero stability which permits accurate measurements with minimal adjustment. Short term zero drift is less than 50µV per hour. Zero offset due to temperature change is less than 150µV per °C after 30 minute warm-up period. This offset, however, can easily be compensated for with the front panel zero controls. 2. Fast warm-up is an inherent characteristic of the Model 602. It can be operated 30 minutes after warm-up on the most sensitive range and almost immediately on less sensitive ranges. 3. Low offset current 5 X 10⁻¹⁵A, minimizes zero offset with high source resistance and permits maximum resolution when measuring current and charge. 4. The 1000 hour life of the batteries enables usage in long term experiments without interruptions for recharging. Battery life is maintained even when the 10mA recorder output is used. For further convenience, battery condition is readily checked on the panel meter. 5. Excellent overload protection without degradation of performance is obtained by use of a unique input circuit. The model 602 Electrometer will withstand damage and has good recovery.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
40
Size:
2.08 Mbytes (2183590 Bytes)
Language:
english
Revision:
C
Manual ID:
29111
Date:
1983 01 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2018 08 24
MD5:
47a7505f76f3379a73a80289b4988543
Downloads:
589

Information

SECTION 1-GENERAL DESCRIPTION 1.1 Introduction ... 1-1 1.2 Model 602 Features ... 1-1 1.3 Warranty Information ... 1-1 1.4 Manual Addenda ... 1-1 1.5 Safety Symbols and Terms ... 1-1 1.6 Safety Precautions ... 1-1 1.7 Specifications ... 1-2 1.8 Optional Accessories ... 1-2 1.8.1 Model 6101A Shielded Probe ... 1-2 1.8.2 Model 6103C Divider Probe ... 1-2 1.8.3 Model 6104 Test Shield ... 1-2 1.8.4 Model 6105 Resistivity Chamber ... 1-2 1.8.5 Model 2503 Static Detector Probe ... 1-2 1.8.6 Model 6011 Input Cable ... 1-2 1.8.7 Model 6012 Triax-to-Coax Adapter ... 1-2 SECTION 2-OPERATION 2.1 Introduction ... 2-1 2.2 Front Panel Controls ... 2 1 2.3 Rear Panel Terminals ... 2-1 2.4 Input Connections ... 2-1 2.5 Preliminary Procedures ... 2-4 2.6 Voltage Measurements ... 2-5 2.6.1 Normal Method Voltage Measurements ... 2-5 2.6.2 Guard Method Voltage Measurements ... 2-5 2.6.3 Low Impedance Source ... 2-5 2.7 Off-Ground Voltage Measurements ... 2-5 2.7.1 FEEDBACK Switch Set To NORMAL ... 2-5 2.7.2 FEEDBACK Switch Set To FAST ... 2-5 2.8 Current Measurements ... 2-6 2.8.1 Normal Mode (0.3 to 10_14A Ranges) ... 2-6 2.8.2 Fast Method (Current Below 10_15A) ... 2-6 2.8.3 Galvanometric Method ... 2-7 2.9 Resistance Measurements ... 2-7 2.9.1 Normal Constant Current Method ... 2-7 2.9.2 Fast Constant Current Method ... 2-8 2.9.3 Voltmeter-Ammeter Method (To 1016J1) ... 2-8 2.10 Charge Measurements ... 2-8 2.11 Recorder Outputs ... 2-9 2.12 Unity-Gain Output ... 2-9 SECTION 3-THEORY OF OPERATION 3.1 Introduction ... 3-1 3.2 Voltmeter Operation ... 3-1 3.3 Voltmeter Circuit ... 3-1 3.4 Ammeter Operation ... 3-1 3.4.1 Normal Method ... 3-1 3.4.2 Fast Method ... 3-2 3.5 Ohmmeter Operation ... 3-2 3.5.1 Normal Method ... 3-2 3.5.2 Guarded Method ... 3-2 3.6 Coulombmeter Opratton ... 3-2 SECTION 4-SERVICING INFORMATION 4.1 Introduction ... - ... 4-1 4.2 Calibration ... 4-1 4.2.1 Recommended Equipment ... 4-1 4.2.2 Calibration Schedule ... 4-1 4.3 Preliminary Procedures ... 4-1 4.4 Mechanical Meter Set and Meter Zero Calibration ... 4-2 4.5 Tracking Check and 1MA Output Calibration ... 4-2 4.6 Noise Check ... 4-2 4.7 Offset Current Check ... 4-2 4.8 Drift Check ... 4-2 4.9 High-Megohm Resistor Verification ... 4-3 4.10 Accuracy Check ... 4-3 4.10.1 Voltage Accuracy Check ... 4-3 4.10.2 Current Accuracy Check ... 4-3 4.10.3 Resistance Accuracy Check ... 4-3 4.10.4 Charge Accuracy Check ... 4-4 4.11 Unity-Gain Check ... 4-4 4.12 Frequency Response Check ... 4-4 4.13 Common Mode Rejection Check ... 4-4 4.14 Troubleshooting ... 4-5 4.14.1 Servicing Schedule ... - ... 4-5 4.14.2 Parts Replacement ... 4-5 4.15 Procedures To Guide Troubleshooting ... 4-2 4.16 Servicing High Impedance Circuitry ... 4-6 SECTION 5-REPLACEABLE PARTS 5.1 Introduction ... 5-1 5.2 Parts List ... 6-1 5.3 Ordering Information ... 5-1 5.4 Factory Service ... 5-1 5.5 Special Handling of Static Sensitive Devices ... 5-1 5.6 Component Location Drawing ... 5-1 5.7 Schematic Diagram ... 5-1

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