Table of Contents
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Quick Start Guide
Evaluation board with heating
for RH/T modules HYT223, HYT271, HYT221 and HYT939P
Material no. 157288
Index
Quick Start Guide .............................................................................................................................. 1
Evaluation board with heating ............................................................................................................. 1
1.1
Schematics ........................................................................................................................ 3
1.2
Interfaces .......................................................................................................................... 3
1.3
Analog signal outputs ........................................................................................................ 4
1.4
Compatibility ..................................................................................................................... 4
1.5
Signal Input ....................................................................................................................... 4
1.5.1
HYT 271 ............................................................................................................................ 5
1.5.2
HYT 223 ............................................................................................................................ 5
QSGH_EVAboard with heating_E2.4.0 | HYT MODULES
1 of 12
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Table of Contents
Summary of Contents for IST HYT
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Page 1: Table Of Contents
Evaluation board with heating ......................1 Schematics ........................3 Interfaces .......................... 3 Analog signal outputs ......................4 Compatibility ........................4 Signal Input ........................4 1.5.1 HYT 271 ..........................5 1.5.2 HYT 223 ..........................5 1 of 12 QSGH_EVAboard with heating_E2.4.0 | HYT MODULES... - Page 2 2.3 PC read-out ..........................8 2.4 Connect with Arduino IDE ......................9 2.4.1 Read out measurement data with Arduino Serial Monitor ............. 10 2.5 Additional commands for heated HYT ..................11 Software ..........................11 3.1 Installation ..........................11 Resources & relevant Documents ....................11 Disclaimer ..........................
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Page 3: Schematics
1. Description This test board is meant for the evaluation of iST`s humidity modules. This includes the heated module HYT223, for which different heating setting can be evaluated. The board has multiple connectors for different HYT modules and uses I C bus protocol to read out relative humidity and temperature signals. -
Page 4: Analog Signal Outputs
C address of a HYT module, please refer to the HYT application note available from the iST AG website. Please note that no more than one HYT humidity module is to be connected to the transmitter at any given time. Refer to Schematics (1.1) for position of the sockets. -
Page 5: Hyt 271
1.5.1 HYT 271 Material no. 153349, 153382, 153680 4-pin socket 1.5.2 HYT 223 Heat Material no. 151331 5-pin socket 5 of 12 QSGH_EVAboard with heating_E2.4.0 | HYT MODULES... -
Page 6: Hyt 939
Material no. 156389, 153326, 155958 Connector HYT wire * All above listed HYT modules connected via an extension cable. The recommended maximum length of the extension cable is 30 cm. The quality of signal transmittance depends on operational conditions and the cable material. -
Page 7: Evaluation Board Start-Up
Mount a selected humidity module on the board following instructions in chapter 1.5 Signal input. Check SDA/VDD/GND/SCL markings on the board and match the HYT orientation. While handling HYT modules, take precautions to avoid ESD damage and avoid touching sensitive sensor areas. Consult the HYT application note for detailed handling instructions with pictures. -
Page 8: Pc Read-Out
9. Start interval logging with a set measurement interval. Use e.g. “l60000” to log every 60000 miliseconds (equal to 1 minute). Be aware that the response time of the HYT module in a particular installation depends on multiple factors including flow conditions. -
Page 9: Connect With Arduino Ide
- Check if «Arduino Micro» is selected. (this should happen automatically.) Warning: DO NOT press the Upload button. It is to replace the existing Firmware. The required Sketch is not distributed by iST to customers. 9 of 12 QSGH_EVAboard with heating_E2.4.0 | HYT MODULES... -
Page 10: Read Out Measurement Data With Arduino Serial Monitor
+ mSec = interval logging for example l10000 (small L) shall read RH +Temp. values every 10000 milliseconds (equal to 10 seconds logging interval) logged values are send over digital and analog outputs 10 of 12 QSGH_EVAboard with heating_E2.4.0 | HYT MODULES... -
Page 11: Additional Commands For Heated Hyt
& h to EEPROM => values are retained next time the device is switched on 3. Software The test board comes installed with firmware for the evaluation of iST`s RH/T modules from the HYT family. See chapter 1.4 for compatibility. -
Page 12: Disclaimer
5. Disclaimer The HYT evaluation board is designed solely for preliminary evaluation purposes and tests with IST AG‘s humidity modules from the HYT family under laboratory conditions. It is not suitable as an electronic component for any type of product. It remains an engineering board, and the electronic layout is subject to changes without prior notice.
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