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Keithley 610C: Difference between revisions
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec|Voltage|11 ranges, | {{Spec|Voltage|11 ranges, 1 mV to 100 V full scale (× 1 / × 3 steps)}} | ||
{{Spec|Input resistance (volts mode)|>10<sup>14</sup> | {{Spec|Input resistance (volts mode)|>10<sup>14</sup> Ω or selectable 10 Ω to 10<sup>11</sup> Ω in decade steps}} | ||
{{Spec|Accuracy|1% of full scale, noise 25 μV}} | {{Spec|Accuracy|1% of full scale, noise 25 μV}} | ||
{{Spec|Zero offset drift|<1 mV per day / 150 μV per °C}} | {{Spec|Zero offset drift|<1 mV per day / 150 μV per °C}} | ||
{{Spec|Current|28 ranges, 10<sup>-14</sup> A to 0.3 A full scale}} | {{Spec|Current|28 ranges, 10<sup>-14</sup> A to 0.3 A full scale}} | ||
{{Spec|Resistance|25 linear ranges, 100 Ω to 10<sup>14</sup> Ω full scale}} | {{Spec|Resistance|25 linear ranges, 100 Ω to 10<sup>14</sup> Ω full scale}} | ||
{{Spec|Charge|17 ranges, 10<sup> | {{Spec|Charge|17 ranges, 10<sup>–13</sup> C to 10<sup>–3</sup> C (Amprere-seconds) full scale}} | ||
{{Spec|Display|Analog Meter; Positive, negative and center-zero display modes}} | {{Spec|Display|Analog Meter; Positive, negative and center-zero display modes}} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
The unit has two sets of outputs on the back panel — one to attach a DVM or recorder, with | The unit has two sets of outputs on the back panel — one to attach a DVM or recorder, with ±3 V or ±1 mA full scale, using a special connector; the other output (marked "×1") tracks the input voltage. It is therefore possible to use the 610C as an amplifier, with a bandwidth of 40 kHz at ×1 down to 100 Hz at maximum amplification. | ||
The input connector is a [[PL259]] | The input connector is a [[UHF connector|PL259 ("UHF") socket]]. Newer electrometers use triaxial input connectors, with the inner shield (guard) driven by an amplifier to be at the same potential as the input, in order to minimize leakage currents. It is possible to use a guarded input connection on the 610C through an adapter, although the guard potential is only available on the back of the instrument, at the "× 1" output. (The terminal labelled "guard" is at input ground potential.) | ||
==Measurement Principle== | ==Measurement Principle== | ||
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The 610C contains only 10 transistors and 2 MOS FETs altogether, which are all used for amplification. The power supply is regulated using Zener diodes. | The 610C contains only 10 transistors and 2 MOS FETs altogether, which are all used for amplification. The power supply is regulated using Zener diodes. | ||
==Pictures== | |||
<gallery> | |||
Keithley 610C front.jpg | |||
Keithley 610C rear.jpg | |||
Keithley-610c-interior.jpg | |||
Keithley-610c-input-section.jpg | |||
Keithley-610c-range-switch.jpg | |||
Keithley-610c-range-resistors.jpg | |||
Keithley-610c-output.jpg | |||
</gallery> | |||
[[Category:Multimeters]] | |||
[[Category:Keithley]] | |||