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In this section, I will focus on the internals of the DAS240-BAT main unit and channel module to uncover what powers this multi-channel recorder and what the unit looks like under the hood, both hardware and software.   Disassembling the Main Unit Surprisingly, the main unit is held together mostly by using plastic rivets which makes disassembly very easy. Removal of the plastic rivet is done by prying on the head, removing it, then removing the collar from the hole. Once all of the plas ...
In this chapter, we will put the B&K Precision/Sefram DAS240-BAT Multi-Channel Recorder through some tests which are relevant for field usage and simulate potential use scenarios.   Battery Life One of the key parameters of interest would be battery life, especially as there may be some missions where the recorder may be on a remote site without access to reliable power or is not allowed to consume power as that may affect the validity of the test.   Battery life was tested with t ...
This chapter is concerned with instrument performance, perhaps one of the most important metrics of test and measurement equipment. It involves in-depth testing of power consumption, charging current profile, analog channel accuracy, digital timing channel accuracy, digital logic channel thresholds and alarm output latency. This section is very time-intensive, especially when analysis is concerned.   Power Consumption & Charging Profile The DAS240-BAT is powered from a 15V 4.5A power su ...
This section goes into depth regarding the various remote control and network access features of the DAS240-BAT, including the bundled software.   Ethernet (LAN) or 802.11b/g
Wireless (Wi-Fi) Option For remote control access, the DAS240-BAT offers an inbuilt 10/100Mbit/s Ethernet interface via an RJ-45 socket on the rear panel. While there are USB-A host connectors for connection to devices, the device does not offer a USB-B device-side connection for remote control.   Instead, it i ...
In this chapter, I will cover various aspects related to the user experience of the DAS240-BAT, including build quality, ergonomics, user interface, capabilities and documentation. Testing was performed with the shipped Firmware V2.0 and the downloadable Firmware V2.2 dated October 2019 from the Sefram Software Update page.   Build Quality My initial impression of the DAS240-BAT is that it is a solid, chunky-feeling unit that looks set for field usage with a few potential weak points. Holdi ...
Now that I have the B&K Precision / Sefram DAS240-BAT package in my hands, lets document the unboxing experience and go through the supplied parts.   Unboxing The unit came inside an Avnet box that was a little bit crushed on a corner, along with a large label that says “Attention Randy Scasny”. I’m not Randy Scansy … but I think we all know who he is ;). The unit itself is packaged in a white box with a colour label on the top with an image of the product. ...
This section will look at the basics of data loggers and chart recorders and how they compare to oscilloscopes, and look at the products on the market similar to the B&K Precision / Sefram DAS240-BAT to understand how it is positioned in the market.   Oscilloscopes, Data Loggers & Chart Recorders – Similar, but Different! I think the majority of readers would be familiar with an oscilloscope. This is basically a piece of test equipment that takes in a signal (usually a voltage ...