Thanks to the good cooperation between our company, the scale manufacturer Ohaus, UPS and DB Schenker, our customer received a verified class III scale with a 50 × 50 cm platform and a capacity of 60 kg only 4 working days after placing the order.
Scales of this type are individually adjusted to the gravity at the place of use during initial verification. The customer can immediately use the scale for the purposes listed in directive 2014/31/EU (article 1).
For the purpose of this article, “serial”, “RS-232” (with and without hyphen), “RS232C” and “COM” can be treated as synonyms. Therefore, a “serial port”, “RS-232C interface” and “COM port” are the same thing.
“Scale”, “balance” and “weighing instrument” are used interchangeably.
In most cases, your A&D scale will be equipped with an RS-232 interface:
You will need an RS-232 cable (serial cable) which is compatible with your scale and – if your PC does not have an RS-232 port – a converter from USB to RS-232 such as FTDI’s Chipi-X or US232R.
This converter will create a virtual COM port on your PC. A&D also offers a set consisting of a converter and a cable.
There are other kinds of converters such as RS-232 to Ethernet, though they are not covered in detail here. As long as they can create virtual COM ports, they can be used with RsWeight.
The configuration used is in this tutorial is shown below:
Not all scales require a converter to USB: The recently released Apollo GX-AE/A & GF-A balances have a USB port which can be configured to work in virtual COM port mode, so all you’ll need is a USB cable. A&D may have released further balances with this functionality by the time you read this article.
Many weighing instruments from A&D can be equipped with a “Quick USB” port. This type of port is recognized as a keyboard and not as a virtual COM port and is therefore not suitable for use with RsWeight (see A&D’s Communication Methods FAQ for further information).
If you know what you’re doing, you can also find USB to RS-232 converters that can be plugged directly into the RS-232 port of your scale (no separate serial cable required). We offer such a solution for A&D scales with a round DIN8 connector such as the HC-i counting scales or FG-KAL/KBM scales (currently only available in our German scales shop):
On Windows 10, driver installation will usually happen automatically when you plug in the converter (on your PC). If this is not the case, you can download the driver from the manufacturer’s website, e.g.:
For other converters, please check with your supplier.
RsWeight is available for free from A&D as part of the WinCT suite. Installation is straight forward and should not pose any challenges: Download the Zip file, unzip it, start setup.exe and follow the prompts on the screen.
You’ll find RsWeight under the “A&D WinCT” group in the start menu. On Windows 10, you can also open the start menu and start typing “RsWeight”.
In the “RS-232C” menu, select the COM port to which your scale is connected on your system. By clicking on the combo box, you can see the full names (requires RsWeight 5.40 or later):
If you’re using a USB to RS-232 converter with FTDI’s chipset, it will show up as a “USB serial port” (as shown above). Converters made by other manufacturers may have slightly different names, but usually they contain the words “serial” and “port”.
The new Apollo GX-AE/A and GF-A balances will be shown as an “AND USB Port for Balance”.
If you’re in doubt, open the Windows Device Manager (under Windows 10, press Ctrl + X, then select Device Manager) and navigate to Ports (COM & LPT):
You can then simply unplug the converter (or balance) from your PC and watch which device disappears (and hopefully reappears when you plug it in again). If you cannot find a suitable device, you must resolve this issue before continuing (most likely you don’t have the correct driver installed, see section 2 above).
All other interface parameters are already set to the default values required by (nearly) all A&D scales and balances:
If you’ve changed these settings in the menu of your scale, you need to make exactly the same changes in RsWeight. If you didn’t modify the default settings of your scale, all you have to do in RsWeight at this stage is set the COM port.
Press Start in RsWeight, put an object on your balance, wait for the stability indicator to show up in the display and press the PRINT button. The weight will appear in RsWeight:
Note: If you do not want to manually press the PRINT button on your balance, you can either change its data transmission mode or instruct RsWeight to request the weight by checking the Repeat checkbox and setting an interval in seconds. Further information can be found in the manual of your balance and in the RsWeight Operation manual (PDF).
We do not recommend using “stream mode” with RsWeight as the software will eventually become too slow to record all values. You can see this in this screenshot where the balance was sending 20 values/s, but RsWeight slowed down to 4 values/s after a few minutes. If you want to continuously record rates of 10 weight values/s (or more) over several minutes, hours or even days, consider using our inexpensive Simple Data Logger software.
In the Option menu, make sure that the Decimal Point is set correctly for your region (e.g. USA->Dot, Germany->Comma). Then, go to File / Save / Data Save and enter a file name and location:
You will be able to open this file in Excel (and other applications) and the data will be neatly arranged in columns (if not, then you probably picked the wrong decimal separator):
This problem can be difficult to solve because there are many components involved in recording the weight from your scale:
If there’s something wrong with just one of these items, data transmission will fail. From our experience, the most common issues are:
If you suspect that you don’t have the correct driver installed, download it from the manufacturer (see section 2).It’s extremely rare for the RS-232 port on an A&D scale to be defective. We’ve only seen this happen once so far. Before you assume that your scale is defective, please make sure that you’ve excluded all other possible causes.
If you are unable to record any data from your scale with RsWeight even after carefully following the instructions in this article and in the linked documents, please contact your weighing instruments dealer or A&D.
Please understand that we cannot offer free support if you have not bought your A&D scale or balance from us.
A drone with a weight of less than 250 g has significant regulatory advantages in many countries. However, there seems to be some uncertainty about the actual weight of the new DJI Mavic Mini.
I weighed mine on an A&D GX-400 precision balance, which has a readability of 0.001 g and uses an internal motorized weight to adjust (“calibrate”) itself.
With the gimbal cover removed and a battery installed, but without a micro SD card, the Mavic Mini came in at around 247.23 g:
DJI Mavic Mini weight without micro SD card by DigitalScalesBlog.com is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.The takeoff weight including a micro SD card was 247.49 g:
DJI Mavic Mini weight with micro SD card by DigitalScalesBlog.com is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.Before anyone asks, I don’t have a traceable calibration certificate for this demo scale. However, I did test it using a 200 g and a 50 g class F1 weight, which gave me readings between 250.002 g and 250.004 g. I’m therefore confident that my drone has a takeoff weight of less than 248 g.
What does this mean for your Mavic Mini? Not that much, as we don’t know DJI’s manufacturing tolerances. However, I have not yet seen a credible claim that any Mavic Mini weighs more than 249 grams. Speaking of tolerances, my three batteries have the following weights:
The Japanese version of the drone uses lighter batteries with a lower capacity to stay below 200 g.
Note: You are welcome to use the two photos marked above under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License. Please contact us regarding the acquisition of license rights if you are unable to comply with the CC terms.
Imagine you were a customer looking for an expensive laboratory balance. You find an interesting product in a dealer’s web shop, but don’t know much about the manufacturer. To learn more about the company, you visit their English website and come across something like this:
In the Weight & Measurement, espacially the precision field, it is necessar that we make products from ideas of engineers with artisan.
We use our high technology with maximum.
While this text can actually be found on vibra.co.jp, its purpose here is only to serve as an example for the translations I see every day. The texts in the header image were taken from the websites of various weighing instrument manufacturers and from user manuals.
What would you think as a potential customer? Would you trust a company that makes high-tech instruments but can’t even use a spell checker?
There is no perfect measuring instrument, and I’m not asking for perfect texts. A quirky translation here and there might actually be endearing. A lack of sophisticated marketing materials can be explained by saying that some manufacturers prefer to invest in other areas.
However: As a manufacturer, you know that you make excellent products. Potential customer may not know this and will look for all sorts of clues to evaluate your trustworthiness. Poor translations sprinkled with spelling errors have the opposite effect of what you intended and actually make it more difficult to sell your products.
Bonus thought: English translations are often used as the basis for further translations (e.g. into French or German). If the initial translation is bad, subsequent translations can easily become completely incomprehensible or misleading (similar to the telephone game).
Medica 2019, the world’s biggest medical trade fair, is currently taking place in Düsseldorf until November 21st. Among more than 5000 exhibitors, you’ll find the following scale manufacturers (in alphabetical order):
Global Website | US / Canada | Europe
