A high quality carrying case is optionally available for the Ohaus Navigator scales. One of our customers asked us if it is possible to use the scale without taking it out of the case.
It is not impossible, but that is not what the carrying case was designed for. To protect the scale, the padding is tightly cut and relatively high. Scales with a rectangular weighing plate could bump on the edge, which will influence the displayed weight:
Ohaus Navigator models with a round weighing plate do not have this problem. However, all scales should be correctly aligned using the integrated level and adjustable feet. To do this, it will usually be necessary to remove them from the case anyway.
The demo kit allows you to easily test the many interfaces available for the Ohaus Defender 5000 indicator. Its sturdy case is well suited for shipping.
Follow these steps to start using it:
The required components and cables can be found in the compartment on the left side (1).
Connect the load cell simulator (2) (3).
This device simulates the load cell that is normally installed in the weighing platform. Make sure that the pointers on the gauge are at 0, but do not turn on the scale yet.
Set the selector knob (4) to the interface you want to test (e.g. WiFi/BT).
If necessary, plug in the WiFi/Bluetooth dongle (5).
Connect the device to AC power and switch it on.
Turn the load cell simulator counterclockwise to increase the weight:
The configuration of the interface is done in the menu of the scale. Printed instructions are included in the case (6).
When using a WiFi or wired Ethernet connection, the device acts as a TCP server. By default, the IP address is assigned automatically (DHCP). WiFi uses port 6060 and Ethernet port 9761.
After establishing a connection as a TCP client (e.g. using PuTTY), you can request the weight by using one of the commands listed in the manual. The “P” command corresponds to pressing the Print button on the scale. The device will answer using the default template:
This template can be changed in the menu. The menu also allows you to select a different capacity or graduation.
Note: A micro SD card is included in the device, but it cannot be easily accessed.
Making an electronic hive scale can be harder than you think
Hive scales for use by beekeepers are a niche market; moreover, they must meet a number of special requirements, such as:
Must withstand long-term outdoor use (protection against rain, moisture/dust, very low and high temperatures, possibly theft/vandalism, wild animals etc.).
Must weigh accurately under challenging conditions (temperature fluctuations, vibrations caused by wind).
Must support a heavy load over a long period of time while still registering small weight changes.
Must be able to transmit weight data (often over long distances).
Must have low power consumption (for off-grid installations).
It is therefore unsurprising that no major scale manufacturer offers a hive scale and that commercially available scales from specialized manufacturers can be quite expensive.
List of hive scales available in Europe
The following list contains all beehive scales available in Europe that we currently know of (both commercial and open source / DIY projects). Websites with descriptions in English and with recent updates were highlighted: