8842A
Instruction Manual
8-2. ACCESSORIES
Accessories include a variety of rack-mounting kits, cables, test leads, and probes. The accessories include installation and/or operating instructions.
8-3. Rack-Mount Kits (Y8834, Y8835 and Y8836)
The rack-mount kits allow the 8842A to be mounted in standard 19-inch rack panels. The Y8834 kit allows the 8842A to be mounted either on the left or the right. The Y8835 kit allows two 8842As to be mounted side-by-side. The Y8836 kit allows the 8842A to be mounted in the center of the rack. Installation instructions are given in Section 2, and are also included with each kit.
8-4. Shielded IEEE-488 Interface Cables (Y8021, Y8022, and Y8023)
Shielded IEEE-488 cables are available in three lengths (see Table 8-1). The cables attach the 8842A to any other IEEE-488 device. Each cable has double 24-pin connectors at both ends to allow stacking. Metric threaded mounting screws are provided with each connector.
8-5. Replacement Test Leads (TL70A)
The TL70A replacement test leads feature safety-designed input connectors.
8-6. Deluxe Test Lead Kits (Y8134)
Each deluxe test lead kit includes two test-tip probes, two alligator clips, two large spade lug tips, and one spring-loaded hook tip and probe.
8-7. Slim-Flex Test Leads (Y8140)
The Y8140 has adjustable, flexible, and insulated leads, and can fit into small places. The sharp steel needle points will pierce varnish and thin insulation.
8-8. Temperature Probes (80T-150U, and 80TK.)
The 80T-150U is a universal temperature probe designed to provide virtually any DMM with temperature measurement capability. The probe provides direct temperature conversion of 1 mV dc per degree. A three-position switch acts as a power switch and is used for selecting Celsius or Fahrenheit scaling for the output. The 80TK thermocouple module converts the microvolt output from a "K" type thermocouple to a 1 mV per degree signal. The on-off switch allows selection of degrees "C" or "F" output scaling.
8-9. RF Probes (85RF and 83RF)
The RF probes (85RF and 83RF) use the DMM dc volts function to measure radio frequency (RF) ac signals. The 83RF has a frequency range of 100 kHz to 100 MHz; the 85RF has a frequency range of 100 kHz to 500 MHz. The probes are calibrated so that the dc output is equivalent to the rms value of a sine wave input over a range of 0.25V to 30V rms.
For best accuracy, the probes should be used with DMMs having 10 MΩ input impedance. This condition is satisfied by the 8842A in the 200V and 1000V ranges. The probes can also be used with the 8842A in the 200 mV, 2V, and 20V ranges if a 10 MΩ resistor is connected in parallel across the 8842A input terminals.
