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Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
http://www.keithley.com
Description
The Keithley Instruments Model 8680 provides a means of connecting and using RTD probes. It is intended for
use with RTD probes terminated in either a 4-wire instrumentation connector or bare wires to safety input jacks
on a 0.5 inch spacing.
The Model 8680 includes a 4-pin detachable terminal block to allow connection of RTDs with unterminated wire
leads. It also includes a socket that accepts a "T" style 4-pin RTD plug.
To avoid a shock hazard and possible instrument damage, do not use the Model 8680 when
you are measuring voltages that exceed 30 V
Characteristics
Temperature measurement range: −220 °C to 630 °C (−360 °F to 1100 °F) maximum; actual range depends
on RTD
Maximum voltage rating: 30 V
Terminal block wire range: 14-26 AWG wire
Terminal block terminals: Brass, nickel-plated.
Terminal block contacts: Beryllium copper.
The Model 8680 supports the Keithley Instruments Model 8681 Miniature RTD Surface Probe.
PA-376 Rev. B / January 2014
Model 8680 RTD Probe Adapter
Figure 1: Model 8680 RTD Probe Adapter
RMS
(42.4 V
)
RMS
PEAK
*PPA376B*
Instruction Sheet
, 42 V
.
PEAK
1
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Summary of Contents for Tektronix Keithley 8680
- Page 1 Model 8680 RTD Probe Adapter Instruction Sheet Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 1-888-KEITHLEY http://www.keithley.com Description The Keithley Instruments Model 8680 provides a means of connecting and using RTD probes. It is intended for use with RTD probes terminated in either a 4-wire instrumentation connector or bare wires to safety input jacks on a 0.5 inch spacing.
- Page 2 Model 8680 RTD Probe Adapter Connections The 4-pin detachable terminal block and 4-pin RTD socket connectors are wired in parallel. The pin designations are shown below. The connectors are brought out the rear of the Model 8680 in a standard 4-wire DMM banana plug configuration.
- Page 3 Safety precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
- Page 4 Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card. When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground) connections.
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