Hioki LR8450 Series Memory HiLogger

Memory Hilogger (Standard Model, Main Unit Only)

• A Single Solution for Dynamic Strain Measurement
• Add Wired or Wireless Channels as You Need Them
• Sample a Large Number of Wired and Wireless Channels at Up to 1 ms

The LR8450 is a portable logger capable of measuring multiple channels of strain and voltage data. The LR8450 (standard model) and LR8450-01 (wireless LAN model) both boast a maximum sampling speed of 1 ms (1/1000 s), the fastest of any Hioki logger. Customers can choose from a selection of measurement units, including the Voltage/Temp Unit and the Strain Unit, according to their application. A single LR8450-01 can host up to 11 plug-in and wireless units to measure as many as 330 channels.

Development Background

Customers in the automotive and environment/alternative energy sectors, both of which Hioki has identified as priority markets, have embraced the legacy Memory HiLogger LR8400 series (max. 10 ms sampling), which can measure a large number of channels despite its compact size, and the popular Wireless Logging Station LR8410 (max. 100 ms sampling), which separates data measurement (by units) and collection (by the instrument).

Common themes appearing in feedback from LR8400 and LR8410 users included a desire to measure large numbers of channels more quickly in development of products such as electric vehicles (EVs), to measure strain on vehicle chassis and batteries along with temperature, and to reduce wiring man-hours and measurement issues by capturing strain data wirelessly.

Key Features

1. Sample a Large Number of Wired and Wireless Channels at Up to 1 ms
Customers need measurement solutions that are capable of accommodating abrupt changes in load in the development of electric vehicles such as EVs, hybrids (HVs), and plug-in hybrids (PHVs).  By using the High Speed Voltage Unit U8553, a 5-channel plug-in unit that can measure voltage at a sampling rate of 1 ms, customers can capture such rapid changes.

The LR8450 series is ideal for capturing output data from sensors that measure low-frequency (from 10 to several dozens of hertz) data such as resin pressure or vibration, which are difficult to measure at conventional sampling speeds. The Wireless High Speed Voltage Unit LR8533, a 5-channel wireless unit, can measure voltage at a sampling rate of 1 ms. This sampling rate is 100 times faster than the LR8410 Wireless Logging Station.

2. A Single Solution for Dynamic Strain Measurement
The Strain Unit U8554 (a plug-in unit) and the Wireless Strain Unit LR8534 (a wireless unit) are also capable of sampling data at up to 1 ms, making them useful in testing strain on vehicle chassis and brakes.

Strain gauges*3 are extremely thin, and their wires are prone to break when positioning them far from the host instrument. Wireless measurement allows wire lengths to be minimized so that wiring man-hours can be reduced and measurement issues such as wire breaks avoided.  Moreover, conventional products require an external component known as a bridge box in order to measure strain. The LR8450 has a built-in bridge box despite its compact size, allowing strain gauges to be connected directly to its measurement units. Strain gauge-type converters can also be connected to measure quantities such as pressure and acceleration.

3. Add Wired or Wireless Channels as You Need Them
Both the LR8450 (standard model) and the LR8450-01 (wireless LAN model) can accept a mix of up to four plug-in units. Since you can combine units with different sampling speeds, you can simultaneously observe fast voltage fluctuations and slow temperature changes.

The LR8450-01 can also connect to seven wireless units. Combined with its four slots for plug-in units, that means you can pair up to 11 units, allowing one LR8450-01 to measure as many as 330 channels.   You can choose whether to use wireless connectivity for measurements as conditions dictate.