www.sensirion.com Version 5 – August 2016 3/8
EK-H4 Users Guide
1 Evaluation Kit Features
The Evaluation Kit EK-H4 may be used as a stand-alone
device, displaying measured values on the screen on the
multiplexer box or – connected to a computer – as a data-
logger run by the Sensor-viewer software.
The stand-alone device displays temperature and humidity
values of each connected sensor plus dew-point derived
from the two measured values.
Besides the above mentioned values the data-logger
software displays calculated absolute humidity and power
consumption. Furthermore, it is possible to change the
acquisition interval (see section 4.7), switch the in-built
heater on and activate a fast conversion mode (see
section 4.9). Eventually measured data can be exported
for data processing.
2 EK-H4 Suitcase
Figure 2 Schematic of the EK-H4 suitcase highlighting its
content
3 Stand-Alone Evaluation Kit
3.1 Getting Started
Set up and application of the stand-alone device is straight
forward:
1. Select multiplexer box, power supply cable, sensors
with sensor cables as many as needed.
2. Connect sensors via sensor cables to the multiplexer
box.
3. Choose appropriate voltage range for the connected
sensors
4. Connect multiplexer box via power supply cable to
power (voltage supply also may occur via USB cable
from a computer). Please note: The specific plug
needs to be connected to the power supply cable –
the plastic protection cap on cable side must be
removed before connecting the plug.
5. As soon as the green LED light is shining, the
measurement starts automatically.
Figure 3 Stand-Alone Evaluation Kit. Voltage supply to be set
in the range of AC 80 … 250V.
3.2 Display Information
After powering the EK-H4 as standalone measurement
tool the screen shows following information:
The first screen shows an overview over the connected
sensors. The second screen (accessed through the push
buttons) shows a detailed information of the connected
sensor. In the first row the sensor number, which can be
matched with the printed number on the cover, is visible.
In the second column the temperature is displayed in °C.
The third column shows the relative humidity. Not
connected sensor ports are displayed with “--.-- ” .
Figure 4 Overview Screen of the EK-H4 multiplexer box
Sensirion
Evaluation Kit
for SHTxx
EKH4 V3.0
1 25.45°C 45.32%RH
2 --.--°C --.--%RH
3 24.98°C 46.27%RH
4 25.71°C 45.46%RH
