Rotronic 1520.HL-20, User Manual

Page: 2 / 23

IN-E-HL20-V1_16
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL20 and HL21 data logger:
User Guide
Instruction Manual
Document Type
Page
2 of 23
Document title
Table of contents:
1. Overview.................................................................................................................................. 4
1.1 General ................................................................................................................................ 4
2. General description ................................................................................................................ 5
2.1 Models ................................................................................................................................. 5
2.2 Required accessories .......................................................................................................... 5
2.3 Batteries ............................................................................................................................... 6
2.4 Real time clock .................................................................................................................... 6
2.5 Memory ................................................................................................................................ 7
2.6 Function key ........................................................................................................................ 7
2.7 Status indicator (LED).......................................................................................................... 7
2.8 Service and data connector ................................................................................................. 7
2.9 Optional display ................................................................................................................... 8
2.10 Operating limits .................................................................................................................... 8
2.11 Configurable settings ........................................................................................................... 9
2.12 Factory default settings ..................................................................................................... 10
2.13 Data logging ....................................................................................................................... 11
3. Operation............................................................................................................................... 12
3.1 Front panel with optional display ....................................................................................... 12
3.2 Initial start-up ..................................................................................................................... 13
3.3 Recording and displaying data (models without display) .................................................. 15
3.4 Displaying and recording data (models with display) ........................................................ 15
3.5 Practical advice for measuring temperature and humidity ................................................ 16
4. Maintenance .......................................................................................................................... 17
4.1 Periodic calibration check .................................................................................................. 17
4.2 Firmware updates .............................................................................................................. 17
5. Technical data ...................................................................................................................... 18
5.1 Specifications ..................................................................................................................... 18
5.2 Dew point accuracy ........................................................................................................... 20
6. Accessories .......................................................................................................................... 21
7. Supporting documents ........................................................................................................ 22
8. Document releases .............................................................................................................. 23
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