Temperature and humidity sensor calibration

All HAM HumiSense devices use a very high precision "SHT-40" digital sensor, which is factory calibrated. The IC sensor we use for the HAM HumiSense is so accurate that none of the HAM HumiSense devices sent to a calibration laboratory required adjustment. Nevertheless, we specify the HAM HumiSense very conservatively to within ±1°C.

Regardless, there are several of our customers, with professional activity in various sectors, who ask us for the HAM HumiSense temperature and humidity sensor to be calibrated, certified by a corresponding calibration laboratory, in order to be fully covered in any potential sanitary control, or ISO and HACCP certifications.

The responsibility of the calibration of a sensor can be undertaken entirely by our company, by sending the sensor to be calibrated to a laboratory with which we cooperate, at an appropriate additional cost.

However, in the case our clients wish to have the calibration of the sensor done on their own responsibility, in a laboratory of their choice, we present the (simplest) procedure we propose they follow, in order to achieve the calibration.

1. Install and configure the HAM HumiSense device in order to connect it to your Wi-Fi and view the temperature readings live through our app or website.

You can find detailed instructions on how to connect a device to the Wi-Fi in our article, by clicking here.

(!) After this step, you can send the devices for calibration to the laboratory of your choice.

2. Inform the calibration laboratory that they need to create an account, free of charge, on the HAM Systems platform, via our website or our app.

You can provide them with detailed instructions on how to register a new user, using our article on the subject, which can be found here.

(!) Ask them to let you know the email they used to create the account.

3. Share all those devices you have sent for calibration with the lab's account created in the previous step.

You can find detailed instructions on how to share your devices in our article, by clicking here.

* Pay special attention to the acceptance of the sharing that the lab has to do from its email, as explained in step 7 of the above article.

1. Once the laboratory has received your devices, they must connect them to the power and give them access to the internet so that they can see live temperature and humidity readings from the sensor during calibration. 

For this purpose, the easiest solution is for the lab to set up a portable hotspot, via a mobile phone, by giving it the same name and password you set up the devices to with when you received them.

Caution! It is important that the created hotspot transmits at a frequency of 2.4GHz, necessary for the communication of the device with the Wi-Fi. The lab can check if their hotspot's Wi-Fi network is at 2.4GHz by following the instructions, in our related article, by clicking here.

2. As soon as the lab completes this procedure, the green led on the devices should stay steadily lit within a few seconds. This means that it is connected to the Wi-Fi and is communicating with our cloud. It is very important that the green led is steadily on before proceeding further with the process.

3. The lab can now open our platform via the app or our website and see the temperature and humidity measured by each sensor in real time.

Caution! The one thing you shouldn't see on the device you are calibrating is the indication "Last online" in yellow letters. This means that device is not connected to the Internet.

4. The laboratory can now start the process of calibrating the device's sensor by viewing its readings at the temperatures and humidities it is subjected to during calibration. 

* Footnote: *

Setting up the Wi-Fi hotspot network is the easiest process for the lab. If it is not easy for the lab to follow the above process, then they will have to connect the devices to their own network, setting up each device from scratch, following the instructions, in our article on the subject, by clicking here.