As computer enthusiasts, we're all too familiar with feature locking used for the purpose of product differentiation. That is, they're manufactured the same, but performance or features are "soft locked" on lower end model to sustain premium value on higher end model. Many industrial and scientific instrument have very primitive computer. Here, I'm messing around in settings on a $1,200 MSRP laboratory scale. I'm messing with it, because it was acquired for next to nothing. The sensor itself is damaged from prior abuse. It works, but reading is not repeatable. There are several models of in this series, all using the same casing and specifications say that they all weigh the same. In service manual, it describes two sub-models. One is 0.01g reading, other is 0.001g reading. They use different sensors. In service parts section, there are only two sensors. The 0.001g and 0.01g type. The unit I'm working on is limited at 200g, or 200,000 count. and reads "overload" when this is exceeded. The $3,000 model which looks just like it has a million count or 1000g x 0.001g. The service manual describes using service software to set up the model type and serial number via RS-232C after replacing the board, then using set of weights and temperature to program calibration into the EEPROM. In service menu, there's an option to display A/D converter output. So, I go in there and low and behold, it provides one million count resolution and weighs all the way up to 1,000g. Back in the 70s and 80s when memory was absurdly expensive, there's certainly a reason why a million count A/D would cost more than a 200,000 count, but I see no reason for this now. Given access to factory service software, I can easily see how sensor unit from the low-end model(from say fried board) traded-in can be used to fix up the top of the line model with damaged sensor. I suppose you can say this is a form of digital rights management to limit features of software controlled products to that of price paid by the customer. How common is this kind of lock-down in industrial process control, manufacturing and instrumentation equipment? I can see this as very attractive for vendors seeing that even if it can be defeated easily, they're unmotivated to do so as it voids calibration and make instruments uncertifiable.