Multimeter
EICO Electronic Instrument Company has added a multimeter to its Truvohm line.
Model 4a4 is a 4000 ohms/volt general-purpose instrument with 17 ranges. The meter measures up to 1000 VDC and VAC, up to 250 mA DC and up to 2 megohms resistance.
It features a recessed selector switch and a 3-inch meter with mirror-back scale all contained within a high-impact plastic case.
Suggested price is $17.95.
Power Supply Circuit--testing capability is featured on the Supplyst power supply from VIZ Test Instruments Group.
Model WP-707 provides two out puts independently adjustable to 0.1V in five switched ranges from 0-25V. The full-load output current is 0-2A over the entire voltage range. Load regulation is better than 0.0750/0 over the full operating range; line regulation is better than 0.050/0 at full output voltage and current when the input voltage is 105-130VAC.
The unit has current-limiting over load and short-circuit protection; each output has its own LED to indicate an overload, and its own reset button.
Logic Probe
The IT-7410/ST-7410 Logic Probes by Heath are designed for in-circuit testing of TTL and CMOS integrated circuits.
Features include switch selection of threshold levels and a memory circuit.
The probes are said to provide true logic level detection at high frequencies (not AC-coupled) and detect pulses as short as 10 nS.
Power for the probe is drawn from the circuit under test via two spring-loaded, insulated clips, and a ground lead is provided for high frequency operation.
Multi-tester
Universal Enterprise's DM100 digital multi-tester features automatic zeroing, automatic polarity indication, .4-inch LED display, 3 1/2-digit resolution, over-range indication, 10-megohm input impedance, fuse protection, battery test mode and 25 ranges.
Available accessories include a tilt stand carrying case, an AC adapter/battery charger, nickel-cadmium batteries, and a variety of test leads, probes, adapters, and connectors.
RFI-Shielded DMM
Dynascan has announced a B&K Precision lab digital multimeter.
Model 2830 is a 31/2 digit AC-powered unit that also can be used in the field with the optional battery pack and features a high-efficiency LED display with 0.43-inch high digits.
It has a basic DC accuracy of 0.5 % and auto-zeroing, auto polarity and 1000/0 overrange on all ranges.
It is shielded to stay accurate when used in RF fields, including operation near business band, broadcast, CB and amateur radio transmitters.
All ranges and functions are pushbutton selectable and a built-in 10-amp current shunt permits the measurement of current up to 19.99 amperes (with overrange), without the need for an external plug-in shunt.
Voltage measurement capability extends to 1,000 VDC or 750 VAC or up to 40,000 volts with the optional PR-28 probe.
The unit is available with a 10-ohm range, capable of 0.01-ohm resolution. The unit offers a total of seven ohms ranges for measurements spanning from 0.01 ohm to 20 megohms.
Selectable high- /low-power ohms permits in-circuit resistance measurements without forward-biasing semiconductor junctions, and allowing high/low selection on four ohms ranges. All voltage ranges are protected to a minimum of +1,000 VDC or DC+AC peak.
The combination tilt stand/handle permits the 2830 to be viewed from four angles. For field use, available options include the LC-50 carrying case and BP-30 battery pack.
The BP-30 permits 8 hours of continuous use from one overnight recharging and can be done while the unit is being used.
Recommended list price is $235.
Portable Scope
Tektronix had added a battery-operated, rugged, lightweight, port able scope to its Telequipment line.
The D34, a dual-trace, 15-MHz oscilloscope with a single time base, has major applications in minicomputer and peripheral servicing, uPs troubleshooting, and video and communications equipment servicing.
TV triggering allows automatic lock on to the TV frame at sweep speeds below 0.1 mS/div, and to TV line at higher sweep speeds.
The scope also can be powered up for calibration when open and will operate up to 4 hours on internal rechargeable batteries or can be connected to AC line.
Suggested list price is $1220.
Frequency Counter
Radio Shack offers the Micronta Digital Frequency Counter 22-351 for use in making frequency measurements in audio, RF, video, ultra sonic and digital applications.
The counter has a 0.6-inch, 6-digit LED display with lead zero blanking. Frequency resolution is 100 Hz throughout the 100 Hz to 45 MHz range, and is protected against input overvoltage.
Features of these products were supplied by the manufacturers, and are listed at no charge to them. If you want factory bulletins, circle the corresponding number on the Reply Card, affix a stamp, list the required information, and mail the card.