Keithley 195A: Difference between revisions
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The '''Keithley 195A''' is a 5½-digit LED True-RMS, auto-ranging digital multimeter. It features a standard GPIB interface. Current and True RMS ranges are optional (Opt. 1950). | The '''Keithley 195A''' is a 5½-digit LED True-RMS, auto-ranging digital multimeter. It features a standard GPIB interface. Current and True RMS ranges are optional (Opt. 1950). | ||
If option 1950 is installed, two jumper wires (zero-ohm resistors), W102 and W103 are to be removed from the circuit. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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Keithley 195A front.jpg | Front panel | Keithley 195A front.jpg | Front panel | ||
Keithley 195A rear.jpg | Rear panel | Keithley 195A rear.jpg | Rear panel | ||
Keithley 195A internal 1.jpg | Internal view, unit with Option 1950 board (bottom left) | Keithley 195A internal 1.jpg | Internal view, unit with Option 1950 board (bottom left), zero-ohm resistors W102 and W103 are lifted | ||
Keithley 195A internal 2.jpg | Internal view, unit with Option 1950 board (bottom left) | Keithley 195A internal 2.jpg | Internal view, unit with Option 1950 board (bottom left) | ||
Keithley 195A internal 3.jpg | Internal view, Option 1950 board flipped up | Keithley 195A internal 3.jpg | Internal view, Option 1950 board flipped up |
Revision as of 05:34, 20 May 2024
The Keithley 195A is a 5½-digit LED True-RMS, auto-ranging digital multimeter. It features a standard GPIB interface. Current and True RMS ranges are optional (Opt. 1950). If option 1950 is installed, two jumper wires (zero-ohm resistors), W102 and W103 are to be removed from the circuit.
Key Specifications
Voltage (DC) | 20 mV to 1000 V full scale in decade ranges; >1 GΩ input resistance (10 MΩ in 20 V and above ranges) |
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Voltage (AC) | 200 mV to 700 V full scale in decade ranges; 2 MΩ // 75 pF; 250 kHz; True RMS; Crest factor <3:1 |
Current (DC) | 20 μA to 2 A full scale in decade ranges (Option 1950) |
Current (AC) | 200 μA to 2 A full scale in decade ranges (Option 1950); True RMS; Crest factor <3:1 |
Resistance | 20 Ω to 20 MΩ full scale in decade ranges, 2- or 4-terminal |
Temperature | –200 °C to +630 °C using a PT-100 RTD sensor |
Pictures
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Front panel
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Rear panel
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Internal view, unit with Option 1950 board (bottom left), zero-ohm resistors W102 and W103 are lifted
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Internal view, unit with Option 1950 board (bottom left)
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Internal view, Option 1950 board flipped up
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Internal view of main board under option/shield
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Internal view towards the rear of the unit