Programmable Multi-Output Electrophoresis Power Supply

What is the Programmable Multi-Output Electrophoresis Power Supply?

A supply with constant voltage, current and power modes, up to about 300–500 V and 2 A, and memory for multi-step programs. Several independent outputs run multiple tanks with different settings at once.

Overview

The programmable multi-output supply suits laboratories that run different experiments simultaneously. Two to four isolated outputs can each be set to their own voltage, current or power, with the total limited by the supply rating. Users can store programs with several steps, for example a low-voltage stacking stage followed by a higher-voltage resolving stage, and each step can have its own time or volt-hour limit. A colour touchscreen or LCD displays live values and accumulated volt-hours, and many models log runs through a USB interface. Safety features include automatic mode crossover, ground-leak detection, overload, short-circuit and no-load protection, and visible alarms. This format is suited to shared core facilities and quality control laboratories that must reproduce run conditions across users.

How does it work?

An electrophoresis power supply converts mains alternating current into a regulated direct-current output. A transformer or switch-mode stage steps the voltage, a rectifier and filter create DC, and a feedback loop holds one chosen variable constant. Because the electrical resistance of a gel changes during a run as ions migrate and buffer heats, the three quantities voltage, current and power are linked by Ohm's law and P = V x I. Constant voltage gives predictable field strength, constant current keeps migration speed steady, and constant power limits heating. Most supplies switch automatically to a limiting mode when a set limit is reached. Key features include multiple outputs, programmable multi-step runs, timers, amp-hour accumulation, no-load and short-circuit detection, and isolated outputs with safety interlocks.

What are the key features?

• Two to four isolated outputs run different tanks with independent settings at the same time
• Constant voltage, constant current and constant power modes with automatic crossover on limit
• Programmable multi-step protocols with time or volt-hour limits store dozens of methods
• USB or Ethernet port exports run logs for record-keeping and traceability
• Ground-leak, overload, short-circuit and no-load detection protect operators and tanks
• Large display shows live voltage, current, power and accumulated volt-hours for every output

What are the technical specifications?

A typical programmable multi-output electrophoresis power supply configuration offers output voltage of 5–500 V DC, output current of 1–2000 mA, maximum total power of 300 W, operating modes of Constant voltage, current or power, number of independent outputs of 2–4 and programmable steps of up to 9 steps per method. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Programmable Multi-Output Electrophoresis Power Supply is used in multi-tank core facility use, programmed SDS-PAGE with stacking and resolving steps, protocol standardisation across users and electrophoresis and blotting in one supply. Across the wider Power Supplies class, laboratories also deploy it for agarose gel electrophoresis, SDS-PAGE and native PAGE and western blot transfer.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61326-1, IEC 61010-2-010, ISO 17025 and 21 CFR Part 11. Certification candidates for this model are CE, ISO 9001 manufacturing and RoHS; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place the supply on a dry bench away from splash and buffer spills, and never operate it with damaged leads. Connect cables with the supply switched off and respect polarity colours. Use only tanks with interlocked lids and shrouded connectors rated for the output voltage. Verify output accuracy periodically against a calibrated meter, and keep vents clear for cooling. Output above 60 V DC is hazardous, so staff should be trained and local electrical safety rules followed. Safety compliance is typically based on IEC 61010-1 and EMC on IEC 61326-1. For regulated laboratories, schedule calibration, keep service records and store run parameters where data integrity is required.

How do I select the right Programmable Multi-Output Electrophoresis Power Supply?

Select a programmable multi-output supply when several tanks run at once, protocols have multiple steps, or records must be retained. It costs more than a basic model. Specify number of outputs, maximum voltage, current and total power, step capacity, data interface and lid-interlock connector type.

How does it compare with other Power Supplies variants?

Match the power supply to the most demanding application. Gel electrophoresis of DNA usually needs up to 300 V and 400 mA, protein and blotting work need higher current, and isoelectric focusing or sequencing need 2000–5000 V at low current. Decide whether constant voltage alone is sufficient or constant current and power modes are also needed. Programmable multi-step protocols, such as ramped focusing, require memory and stepping. Count how many tanks run together, because multiple outputs share total power. Look for clear displays, automatic overload, no-load and short-circuit protection, isolation from earth, and compliance with IEC 61010-1. Check connector type and whether cables are compatible with your tanks, and consider remote-control or USB options for documentation.