YOKOGAWA LR4220E Desktop recording equipment

The YOKOGAWA LR4220E is a high-performance laboratory-grade desktop recorder, specifically a 4-pen model from the legendary LR series.

 It is renowned for its reliability in capturing fast-moving analog signals with extreme precision on a wide-format strip chart.

1. Introduction

The LR4220E is part of the LR4200 family, which revolutionized the industry by combining traditional analog pen-recording with digital data processing.

 The "4220" designation indicates a 4-pen continuous trace model, and the "E" suffix typically denotes the international/English version with a universal power supply. 

It uses a high-speed, high-accuracy servo-drive system to move pens across a 250mm wide chart paper.

2. Technical Parameter Table

3. Product Advantages and Features

High-Speed Dynamic Response: With a pen speed of 1600 mm/s and $8G$ acceleration, it can accurately track rapid signal fluctuations that would be blurred by slower recorders.

Digital & Analog Hybrid: While it draws a continuous analog line, it also features a built-in vacuum fluorescent display (VFD) for digital monitoring and can print numeric date/time data directly on the chart.

Intelligent Measurement Functions: Supports delta T (temperature difference) calculations, scaling, and square root extraction without requiring external signal conditioners.

Superior Durability: Designed for long-term laboratory use with a non-contact ultrasonic pen-position sensor that eliminates the wear-and-tear associated with traditional slide-wire potentiometers.

4. Application Cases

Battery Testing: Monitoring charge/discharge cycles where 4 different variables (Voltage, Current, Temperature, and Internal Pressure) must be compared simultaneously.

R&D Labs: Capturing transient phenomena in chemistry or physics experiments that require a high-resolution physical "hard copy" for legal or scientific records.

Automotive Engineering: Recording sensor data during engine dyno tests or suspension stress tests.

Pilot Plant Monitoring: Tracking critical process variables in small-scale chemical production before scaling to full factory levels.

5. Other Models in the Same Series

The LR series is categorized by the number of pens and the physical layout:

LR4210: 1-pen version.

LR4220: 2-pen version.

LR8100: A larger, vertical rack-mount series (up to 8 pens).

LR12000: A high-end model featuring advanced mathematical computing capabilities and color LCDs.

6. Consumables & Related Models

To maintain the LR4220E, specific genuine Yokogawa supplies are required:

B9573AN: Disposable felt-tip pens (available in different colors for each channel).

B9619AK: Z-fold chart paper (30 meters length, 250mm width).

B9573AG: Replacement ribbon for digital printing functions.

Note: As the LR4220E is a legacy product, many users are transitioning to the Yokogawa GP10/GP20 series paperless recorders.

 However, the LR series remains in high demand for applications where an immediate, physical, and continuous analog trace is legally or technically preferred.