Rohde-schwarz-hm8112-operation-service MANUAL – Service manual (PDF)

The HM 8112 System Multimeter manual provides detailed instructions for setup, operation, and troubleshooting, including commencing operation, keyboard and integration settings, offset correction, error messages, and self-test procedures. It also covers operating instructions for various measurements such as Vdc, Vac, mAdc/mAac, KOhm, and includes information on optional features like a scanner/multiplexer and IEEE 488-Bus interface.

Brand: Manuals
Model: MANUAL
Type: service manual
File size: 3.2 MB

Manual Overview

The HM 8112 System Multimeter service manual provides detailed guidance for troubleshooting, error diagnostics, calibration, and board-level adjustments. Troubleshooting is facilitated through a comprehensive self-test routine that checks all analog functions and provides concise error messages. The device supports electronic calibration via the keyboard or IEEE-488-Bus, eliminating the need to open the case. Calibration constants are stored in non-volatile memory, ensuring stability. Error diagnostics are enhanced by built-in self-test functions and the ability to display error messages, which aid in identifying and resolving issues efficiently. The multimeter supports a range of measurements with high accuracy, including DC voltage, AC voltage, current, and resistance, with the option for automatic or manual range setting. The optional 4-pole/10-channel scanner enhances measurement versatility, controlled either manually or via the IEEE-Bus. The manual emphasizes the importance of maintaining high input resistance and low thermoelectric EMF for precise measurements. The IEEE-488-Bus interface allows for seamless integration and control, supporting various programming commands and data transfer capabilities.

Quick Issues Covered

Error messages and self-test for diagnostics and troubleshooting.
Electronic calibration via keyboard or IEEE-488-Bus adjustments.
Schematics for circuit tracing and fault isolation.

Overview

The HM 8112 is a 6½ digit high accuracy system multimeter designed by HAMEG Instruments. It is part of the Modular System 8000, offering compact and flexible test facilities. The multimeter features a 6½ digit display, true RMS measurement capability, and a resolution of 100nV, 1mΩ, and 10nA. It supports 10 measurements per second with programmable measuring times from 0.1s to 10s. The device includes a built-in self-test function, high input resistance, and electronic calibration via keyboard or IEEE-488-Bus. It offers automatic or manual range setting and an optional 4-pole 10-channel scanner. The HM 8112 is equipped with a talker/listener IEEE-Bus interface for controlled measurements and calibration, and it supports various programming and control commands. The multimeter is suitable for fast, accurate, and reliable measurements, with features like digital offset correction and a start-up self-test routine with error messages.