Model 907/908 Measurement System

Description

The Model 907 and Model 908 microprocessor controlled Gaussmeters offer sophisticated measuring functions with selectable units in a simple to use, menu driven, hand-held package.

The 907 & 908 are designed for factory floor, incoming inspection/quality assurance and laboratory measurement of Magnetic Flux Density and Magnetic Field Strength in SI or CGS units. The polarity, measurement value, measurement units, and measurement functions are displayed on a two line, sixteen character, dot matrix, liquid crystal display.

Introduction

The Model 907 and Model 908 Gaussmeters have been designed and manufactured with more than 30 years experience in magnetic measurement. This experience and our extensive knowledge of the magnetics market has enabled us to offer an instrument incorporating all of the measurement functions a user is ever likely to need. The Model 907 & 908 are controlled by a simple menu and supplied with a thin, semi-flexible Transverse Hall Probe suitable for all but the very smallest of applications.

The Model 907 & 908 incorporate an Analog Peak Detector for the DC and AC peak functions. This, coupled with the microprocessor operation of the Model 907 & 908, means that fast response is possible with digital stability (fast pulses/no droop in readings).

Applications

The 907 is ideal for inspection and measurement of magnetic flux density of magnets and magnet assemblies in both incoming inspection and Quality Assurance environments. Where individual measurements need to be recorded the Model 908 will store and upload not only the measured values, polarity, measurement units and measurement function, but also the time at which the measurement was taken.

Other menu options

• A "Units" selection to change between Tesla, Amps/m, Gauss and Oersted.
• A "Capture" option. This enables you to choose between storing, recalling and holding readings in memory.
• The "Utilities" option enables you to choose between a number of lesser used functions such as Null (Zeroing), self calibration process, control of automatic power down timing and even a language option including English, French, German, Italian, Spanish and Portuguese.

Features Available Only With The Model 908

The Model 908 includes all of the functions of the Model 907 plus:

• An RS232 interface including an adapter to provide RS232 communication for uploading measurement data to a host computer. The Model 908 can also be remotely controllable via this link. Software supplied for IBM PC.

The Model 908 incorporates a non-volatile memory to enable the retention of stored values even when switched off.

• The Model 908 incorporates a time keeping device so that the time when data has been stored can also be recorded. Also an external PSU for bench top applications.

The Hall Probe

Both the Model 907K (Kit) and the Model 908K (Kit) are supplied with a transverse Hall probe as standard. The design of the Hall probe is critical to the satisfactory operation of any Gaussmeter. For the Model 907 and Model 908 we have used our extensive industrial experience to produce a transverse Hall probe which is semi-flexible and only 1 mm thick by 4 mm wide. This enables operators to take measurements in tight spaces and narrow air gaps. In addition the sensitive Hall element is clearly visible so that the user knows exactly where the measurement is being made. The probe is fitted with a push button enabling the operator to HOLD and STORE measurements and to orient the probe for polarity readings. An axial probe is also available as an optional extra. This is only 5 mm in diameter and also incorporates a push button for HOLD and STORE functions. All transverse and axial probes are fully interchangeable on both the Model 907 and Model 908 without the need for re-calibration.

Model 907 & 908 Probes