Keithley 602 Analog multimeter
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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.
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