Z-2000 series of flame, furnace and tandem atomic absorption spectrophotometers can accurately determine low concentrations of toxic elements such as cadmium, mercury, lead and hexavalent chromium. This is of increasing importance with the implementation of the Waste Electrical and Electronic Equipment Directive and the planned implementation of the Restriction of Hazardous Substances.
A new method of sample preparation for polyethylene samples uses high pressure microwave digestion with nitric acid. This replaces traditional extraction methods using sulphuric acid which is not suitable for the measurement of lead. Details of the new extraction method can be found in a new technical data sheet. (AA Sheet No. 72) For a copy, e- mail: info@hitachi-hitec-uk.com.
Has polarized Zeeman background correction method on both flame and furnace instruments, for effective background elimination and stable baselines. The dual-beam optics feature twin detectors. Detection limits for the flame instrument (in micrograms/g) are Cd: 2, Pb: 50 and Cr: 50. For the furnace instrument they are: Cd: 0.01, Pb: 0.25 and Cr: 0.2.
AirMax VS signal connectors have passed both the RoHS and FCI Lead-Free qualification. While the AirMax VS Guides have always been available only as lead-free parts, the qualification of the signal connectors is the next step in ensuring that the VS family meets the environmental specification.
RoHS qualification included testing both receptacles and headers for insertion, retention and repair. The FCI lead-free qualification is an internal six-month test for whisker growth.
The test documentation report will be available in approximately three weeks.
VS connector system offers high-speed computing and networking designers versatility in structuring their backplane signal routing.
VS power connectors are in the process of being RoHS-qualified.
Mill-Max now offers a 7” mini reel to accommodate 8 & 12 mm carrier tapes.
Offers receptacles (discrete sockets) on carrier tape per EIA-481 to feed automated pick-and-place equipment. A 7” reel holds about one quarter the parts of a 13” reel. Is more economic and convenient for smaller volume customers.
Two types of receptacles are available on carrier tape: surface-mount, flat types, which sit on the surface of the PCB where the pin or component lead plugs-in parallel to the PCB; and thru-hole types where the lead plugs-in perpendicular to the PCB. Thru-hole receptacles are intrusive reflow soldered.
Thru-hole (tubular) receptacles have an Organic Fibre Plug barrier which prevents solder paste or flux from contaminating the spring contact. After soldering, the barrier is pushed out of the receptacle when the device is plugged in.
Lead free plating options are available. Instead of traditional tin/lead plating on the receptacle’s shell and contact, a pure matte tin with oxide and whisker inhibitors can be specified.