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7050LP Low Pressure Indicator

sku Product SKU:  FCL-7050LP

The 7050LP low pressure digital pressure indicator, part of the versatile Series 7250 family, is specifically designed to meet the demanding performance requirements of calibrating low pressure sensors, transducers, mechanical gauges, portable calibrators and their plug-in modules. To accommodate bidirectional devices, the 7050LP can be supplied to operate in both positive and negative gauge modes.

The 7050LP offers unmatched performance and measurement precision. Utilizing multiple ranges in a single instrument, the 7050LP combines precision, stability, and affordability. The 7050LP has a unique quartz sensor, the most accurate pressure sensing technology available in a digital pressure calibrator. Each quartz sensor is manufactured and tested to provide the ultimate performance required by a Fluke Calibration pressure calibrator, ensuring that every customer receives the highest quality, precision and stability in their instrument.

Advanced precision

The 7050LP is available in three different range configurations, each a dual range instrument. Select either the 10 inH20 and 30 inH2O combination, or the 20 inH2O and 60 inH2O or the 35 inH2O and 100 inH2O range combination. Each combination provides a precision to 0.005 % of reading from 10 to 100 % of the higher range. For pressures from 0 to 10 %, the precision is a fixed error equal to 0.005 % of 10 % FS. This unmatched precision is achieved by the unique quartz pressure sensing technology that puts the pressure in direct contact with the quartz element, eliminating mechanical linkages and metal diaphragms. Since this is a differential sensor, the reference side of the 7050LP can be connected to the reference side (low side) of the device under test. Therefore, disturbances due to room drafts, HVAC systems and opening/closing doors, which can have a detrimental effect on the calibration process, are eliminated. The 7050LP provides both unequalled precision and excellent long term stability due to the inherent properties of quartz. For example, the total uncertainty for a 10/30 inH2O range combination over a one year calibration interval is 0.009 % of reading or 0.00015 inH2O (whichever is greater).

Automating pressure test and calibration

The 7050LP is easy to use and can be automated through the remote interface.

The 7050LP is provided with both an RS-232 and IEEE-488 interface, and syntax for all Series 7250s follows SCPI protocol for easy programming. COMPASS® for Pressure, an off-the-shelf software package, is available. A LabVIEW® driver is available as a free download. As a standard feature, software written for the previous generation Series 7215, 7010 and 6000 instruments is fully supported by the 7050LP. The 7050LP can be set to 510 emulation mode to use software originally written for the DPI 510. Firmware updates can be performed over the RS-232 interface (updates can be downloaded from the web site). A MET/CAL® software driver is available.

Versatility to handle any pneumatic pressure calibration

The 7050LP is versatile enough to handle almost any type of low pressure calibration.

Dual range: The 7050LP has two ranges in one instrument, 10 inH2O and 30 inH2O, or specify the 20 inH2O and 60 inH2O or the 35 inH2O and 100 inH2O range combination. The 7050LP will automatically change ranges to ensure the highest performance at the requested pressure.

Pressure units/scales: The 7050LP includes more than 12 standard units of measure, including inH2O at 4 °C (39 °F), 20 °C (68 °F), and 16°C (61 °F), in Hg at 0 °C (32 °F) and 16 °C (61 °F), kPa, bar, psi, kg/cm3, mm Hg at 0 °C (32 °F), cm Hg at 0 °C (32 °F), and cm H2O at 4°C (39 °F), and two user-defined units.

Head pressure: The 7050LP automatically corrects for head pressure differences.

Accredited Calibration Report: The 7050LP comes standard with an accredited calibration report.

Options

The 7050LP can be provided for gauge mode operation, or with:

  • Vacuum (negative gauge) mode for bidirectional devices
  • Rack mount kit

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Ametek ETS TerraSAS

sku Product SKU:  AME-ETS TERRASAS

For microgrids, energy storage, and inverter test applications, the TerraSAS™ series photovoltaic (PV) simulators are specifically designed to emulate the dynamic electrical behavior of a terrestrial PV solar array. They offer low output capacitance and high closed loop bandwidth to keep up with the advanced Maximum Power Point Tracking (MPPT) algorithms used in today’s grid-tied inverters. The Embedded TerraSAS (ETS) is a high performance solution in a small form factor that combines an agile power supply with an innovative I-V curve generator in a single standalone unit.

• ETS 600 / 1000: For isolated and non-isolated string inverters up to 1000Vdc Voc.

• ETS 60 / 80 / 150: For use with micro-inverters or DC optimizers up to 150Vdc Voc.

• See Datasheet under Downloads: Datasheet

Application
Many solar inverters generate AC ripple on their DC input, which is connected to the photovoltaic array. For single phase inverters, the frequency of this ripple is twice the line frequency (120 Hz for US models). The simulator’s power supplies must not suppress this ripple as a function of their regulation loop. An increasing number of inverters (and virtually all micro-inverters) accurately measure amplitude and phase of the ripple voltage and current to quickly track the MPP of the array. This approach allows tracking the MPP at a much higher speed when compared to conventional dithering techniques (also called perturbate-and-observe). Faster tracking of the MPP results in a much higher overall efficiency in cloudy conditions, where the irradiance is constantly changing. It is likely that all solar inverters will use this approach in the near future, since end users are very sensitive to the overall efficiency of their solar energy installations. To satisfy this requirement, the PV simulator must be capable of reproducing the voltage / current behavior of a solar array at the ripple frequency. Most standard switching power supplies employ very large output capacitors and inductors in their output circuits and are unable to deliver the required performance - regardless of the response speed of the I-V curve controller. The Elgar TerraSAS line of PV simulators are based on high speed versions of our standard products, where output capacitors and other speed-limiting components have been adjusted. This results in a speed improvement of 10 times or better. Proprietary features built into the PV controller hardware and firmware, combined with our high speed power supplies, deliver the required performance. This technology was extensively tested on micro-inverters and is ready to test the next generation of inverters. The required performance is delivered by high speed switching power supplies and advanced Digital Signal Processing techniques. In some conditions traditional DC power sources using IGBT technology do not meet MPPT response speed requirements, depending on the MPPT principles. Our power supplies use Power MOSFETs, which typically switch ten times as fast as the most recent IGBTs. Higher switching frequency translates to smaller output capacitors and inductors - which is the key to a successful high speed power supply design.

Scalability
Power supplies are available in 850W, 5kW, 10kW, and 15KW increments. The 80V units are available in two power levels: 1200W for microinverters and 850W for the latest generation microinverters and DC power optimizers. The bandwidth on the 850W version has been improved to 30kHz by adding a linear regulation output stage. 600V and 1000V units are available in 5kW, 10kW, and 15kW versions depending on Isc requirements. All versions are easily connected in parallel to scale output power up to handle microinverters, string inverters, and even utility scale inverters. Many models can also be connected in series to handle higher voltage tests. Please refer to the connection diagrams located in the User Manual and follow appropriate wiring codes before connecting ETS PV simulators in series or paralle.

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Ametek XEL Series

sku Product SKU:  AME-XEL S

The Sorensen XEL benchtop power supply is as easy to use as simple analog power supplies but offers the flexibility of advanced digital features. The user interface allows easy control with single-turn knobs including a fine control knob for voltage.

This easy-to-use interface is complemented by V-Span, S-lock and Output Enable functions. V-Span allows the user to set a maximum and minimum value over which the knob control operates. This provides more precise control over the voltage as the knob operates over a narrow range as well as protecting devices under test by limiting the maximum voltage. S-Lock provides an easy method to output a regulated fixed voltage. Output Enable lets the user setup the desired voltage and current levels prior to actually turning on the output. All of these features in a laboratory bench supply are only found in the XEL series.

The programming "P" models include LXI Class C Ethernet, USB, RS-232 and analog remote control. The option "GP" inlcudes GPIB programming plus all of the interface methods included with the "P" models described above. This remote programming capability makes the XEL-P models well suited for system or ATE integration.

At 4.2x11.3 inches (108mm x 287mm), the XEL series occupies the least bench top space of any programmable power supply. The dual output model offers 90W per channel, also in a compact 8.4x11.3 inches (216mm x 287mm).

The dual output XEL30-3D is two 30V/3A power supplies in one unit. All of the features of the single output version are also in the dual output. The outputs are fully independent and isolated. Plus, the outputs can be operated in 4 modes: isolated, tracking, ratio tracking and true parallel. In addition, the outputs can be enable (on/off) independently or synchronously.

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Ametek XBT Series

sku Product SKU:  AME- XBT S

The Sorensen XBT32-3FTP adds to the capability of the Sorensen benchtop product line with a 16-bit triple output supply. Channels 1 and 2 can be programmed 0-32V and 0-3A each. The third output is fully programmable 0-15V, 0-5A up to a maximum of 30W. Channels 1 and 2 can be configured for tracking, parallel or series operation to, in effect, provide the equivalent of 6 different power supplies. In isolated mode, each of the 3 outputs functions independently; in tracking mode, channels 1 and 2 provide the same, but isolated output; in parallel mode, there is one 0-32V/0-6A output and one 0-15V/0-5A/30W output; in series mode, there is one 0-64V/0-3A output and one 0-15V/0-5A/30W output.

Safety of devices under test is paramount. The Sorensen XBT series of power supplies provides superior device protection. Each output is fully isolated with voltage/current preview before turning on the output. Built-in switches, in addition to enabling the preview mode, can configure the outputs for parallel or series connection while graphics on the front panel show the user where to make connections.

Advanced engineering features include storage of 100 different setups (voltage and current) as well as a 100 hour timer. Power- on state and synchronous or individual control of each channel output can also be set. Over-voltage and over-current protection is programmed for each channel.

Computer control is easily accomplished through industry-standard SCPI commands via the USB or RS-232C interfaces which come standard on every unit. The GPIB / Ethernet interface option allows 3 low power channels in a half-rack for ATE applications. This option also includes an 8-bit digital I/O which can be set as input or output signals for programming.

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