Introduction to the Quaternary Pump

The Low-Pressure Pump Main Board (LPM)

The Low-Pressure Pump Main Board (LPM)

The board controls all information and activities of all assemblies within the quaternary pump. The operator enters parameters, changes modes and controls the quaternary pump through interfaces (CAN, GPIB or RS-232C) connected to the user-interfaces. Figure 45 and Figure 46 show the block diagrams of this board.

ASIC — Application-Specific Integrated Circuit

The application-specific integrated circuit (ASIC) includes all digital logic for the core processor functions and also for module-specific functions.

Motor Drive

The drive comprises motor control, motor amplifier (drive) and current control.

Active Inlet Valve Drive

The drive comprises two amplifiers for the two contacts of valve solenoid.

Gradient Valve Drive

The drive consists of the amplifiers for the four solenoids of the gradient valve.

Pressure Converter

This block comprises a filter and amplifier for the pressure-sensor-signal, a multiplexer, an A/D converter and an offset correction for the analog pressure output signal. The output voltage is 2 mV/bar.

Leak Converter

This block comprises a PTC for the leak identification and a NTC for the ambient temperature measurement. This assures that temperature changes are not identified as leak. A leak would cool down the PTC and its change in resistance results in a leak signal.

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Agilent Technologies 1100 Series manual Low-Pressure Pump Main Board LPM

1100 Series specifications

Agilent Technologies 1100 Series is a highly regarded lineup of high-performance liquid chromatography (HPLC) systems designed to meet the demanding needs of laboratories in various fields including pharmaceuticals, environmental testing, and food safety. Known for its versatility, reliability, and advanced technology, the 1100 Series has established itself as a benchmark for analytical performance.

One of the standout features of the Agilent 1100 Series is its modular architecture. This design allows users to configure the system according to specific analytical requirements. The components such as pumps, detectors, and autosamplers can be mixed and matched to create a tailored solution, ensuring maximum efficiency and optimal performance. This modularity also facilitates easy upgrades and maintenance, significantly extending the life cycle of the instrument.

At the heart of the 1100 Series is its advanced pumping technology. The system utilizes precise, high-pressure pumps that ensure a consistent flow rate and excellent reproducibility, essential for accurate quantification of analytes. The binary and quaternary pump options provide flexibility in method development, enabling users to perform gradient elution with ease.

The Agilent 1100 Series also boasts a range of detectors, including UV/VIS, fluorescence, and refractive index detectors. Each detector is designed to enhance sensitivity and specificity, enabling the detection of a wide array of compounds. The UV/VIS detector, in particular, is known for its reliable performance and user-friendly interface, which simplifies method setup and data analysis.

Another critical aspect of the 1100 Series is its autosampler. The system's autosamplers provide high throughput and automatic sample handling, which significantly reduces human error and increases productivity. The intelligent design allows for temperature control and reliable sample injection, ensuring optimal results.

In terms of software, the 1100 Series is supported by Agilent’s OpenLAB software, which offers an intuitive platform for method development, data acquisition, and analysis. This software integrates seamlessly with the HPLC hardware, making it easier for scientists to manage workflows and maintain compliance with regulatory requirements.

Overall, the Agilent Technologies 1100 Series represents a significant advancement in liquid chromatography, bringing together ideal characteristics such as modularity, precision, versatility, and sophistication. Its commitment to innovation and quality makes it a preferred choice for laboratories seeking reliable analytical solutions.