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 The Multi Height Microposition Probe combined with the RM3-AR Test Unit is Jandel's most versatile four point probing system. It includes a fine X-Y stage for positioning small samples under the four point probe tips. The X-Y stage can be easily removed for measuring large samples such as substrates up to 10" x 10", or tall materials up to 6" tall. The RM3-AR Test Unit is Jandel's superior measurement electronics which was designed specifically for the four point probe measurement. The RM3-AR has a measurement range from 1 milliohm-per-square up to 5 x 10^8 ohms-per-square with 0.5% accuracy. The volume resistivity measurement range is from 10^-3 to 10^6 ohms-cm. Multi Height Microposition Probe The Multi Height Microposition Probe comprises a hard anodised aluminium base 25cm wide, 29cm deep and 0.8cm thick. A 19mm diameter stainless steel column 20cm high screwed to the base supports the probe head raising and lowering mechanism incorporating the vertical slide, operating lever shaft, and micro-switch. The vertical slide carries the probe-head, secured by a clamp screw. The probe-head is positioned so that the micro-switch does not pass current until the probes have made contact; lost motion ensures that the current is switched off before the probes are raised. The probe arm can be easily positioned on the vertical shaft to various heights to allow probing onto either flat materials or large or thick materials. For example, a shallow dish containing LN2 could be placed on the base plate and the arm could be positioned to allow the probe to be lowered onto a sample submerged in liquid nitrogen. With the X-Y stage removed, materials up to 10" x 10" x 6" tall can be positioned under the probe arm. If necessary, a taller vertical post can be supplied for use in measuring taller items. The Multi Height Microposition Probe includes a removable X-Y stage which can be bolted to the base plate to aid in positioning the materials accurately when probing onto small samples.
The RM3-AR Test Unit is a specialty electronics instruments designed specifically for the four point probe measurement. It features high accuracy, an excellent range, and many features which simplify the four point probing measurement. The following are features of the RM3-AR Test Unit:
Superior Inbuilt DVM
Cylindrical Probe Head The Cylindrical probe head, one of which is included with the Multi Height Microposition Probe, can withstand temperatures from 77K up to 120C in it's standard configuration. A modification to the Cylindrical probe will allow it to withstand temperatures from 77K up to 200C (in an oven). The Multi Height Microposition Probe is conservatively limited to 150C, however, temperatures up to 300C using a hot plate are okay if certain precautions are taken. The Cylindrical probe head is built to high standards of quality and accuracy. A brochure regarding the Cylindrical probe can be found here: http://www.fourpointprobes.com/jandelcylindrical.pdf An application note with information regarding the constructions and specifications of the Jandel Cylindrical probe can be seen here: http://www.fourpointprobes.com/cylindrical_app_notes.pdf 
Click here to see the instruction manual (688K PDF file) for the RM3-AR Test Unit |
| Four-Point-Probes is a division of Bridge Technology. To request further information please call Bridge Technology at (480) 988-2256 or send e-mail to Larry Bridge at: sales@bridgetec.com |
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