IET PLS Series - The World's Only Programmable Inductance Decade Box
A broad range of laboratory grade programmable inductance decade boxes for applications requiring a programmable impedance unit controlled manually and by a computer via an IEEE-488, RS-232 interface.
The PLS Series is a broad line of high precision programmable decade inductors. They provide straight inductance in a wide selection of ranges, tolerances andratings. IET Labs also supplies custom combination substituters for capacitance and resistance as well as sources for voltage and current.
The PLS Series is a precision substituter with excellent characteristics of stability, temperature coefficient, and power coefficient. High dynamic ranges are available, starting as low as 1 µH and extending for as many as 10 decades. These features combined with a low virtually constant residual impedance make for very versatile instruments.
The PLS Series programmable inductance box features two optional special settings, an “open circuit” and a “short circuit”. These modes are useful for obtaining reproducible transitions between settings, i.e. break-before-make or to short between settings. The “short circuit” setting also provides a reduced zero setting impedance.
Operation is both local using convenient direct reading front panel thumbwheel switches, and remote with optional parallel RS-232 Serial or IEEE-488 interfaces.The PLS Series employs very low inductance relays. High quality gold plated tellurium copper five-way binding posts serve to minimize the thermal emf effects which would artificially reflect a change in dc resistance measurements. All other conductors within the instrument, as well as the solder employed, contain no metals or junctions that could contribute to thermal emf problems.
With low resolutions and high dynamic ranges, the PLS Series may be used for exacting precision measurement applications requiring high accuracy, good stability, and low zero impedance. They are suited for automatic and manual calibration and testing, simulation of programmable loads, and many other laboratory and industrial applications.
The components employed in these substituters are accurate and stable. Low temperature coefficient inductors are used. Inductors are selected for best suitability to each decade.
The PLS Series offers an optional digital display to indicate the control command. The unit may be rack mounted to serve as a component in measurement and control systems.
User Interface:Front panel switch REMOTE(Optinal:IEEE-488,Ethernet or RS-232 interface) or local(front-panel thumbwheel) operation.
Accuracy: The accuracy shown in the chart below applies after subtraction of the "zero setting" residual impedance.
Accuracy(PRTD): The absolute accuracy indicated below applies without requiring subtraction of "zero setting" residual impedance.
Min.setting:<15uV;<10uV,typical
Terminal:
Four low-emf,gold-plated,tellurium-copper 5-way binding posts are used for HI and LO terminal pairs for CURRENT and SENSE.GND binding post is connected to the case, to the chassis ground and to the earth ground.Rear outputs are available with the RO option.
Switching time: <4ms per change;<7ms for ≤0.05% units.
Power requirements: 90-264Vac, 47-63Hz. 30Watts Max.
Dimensions:
Bench model:22cm W×12cm H×24cm D(8.5"×4.44"×9.25")
Rack model:Panel:48.3cm W×13,2 H(19"×5.2");
Behind panel:42.7cm W×12.4cm H×31.5cm D（16.8“×5.2”×12.4"）;
In front of panel:3.8cm(1.5")
Weight:
Bench model:2.0kg(4.5lb);
Rack model:4.5kg(10lb);
Dual rack mount model:6.4kg(14lb);
weight specifications are nominal.
Remote Control Options：
IEEE：GPIB standard 24 pin connector, conforms to IEEE-488.2; SCPI 1994.0 command set;Hardware or software configurable addressing range of 0 to 30.
RS232:25 pin male DTE interface conforms to EIA-STD-RS-530;SCPI 1994.0 command set; data rates from 300 to 115200 bps.
