ROTRONIC HygroLog HL20 - Manual (Page 8)

IN-E-HL20-V1_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroLog HL20 and HL21 data logger:
User Guide Instruction Manual
Document Type
Page 8 of 17
Document title
© 2010-2011; Rotronic AG IN-E-HL20-V1_12
The data logger suspends the Display Sleep function whenever the function key is pressed. The
function is also suspended when the data logger is connected to the USB port of a PC by means
of cable AC3006.
2.12 Factory default settings
Configurable Settings
Factory default
Unit system Metric, except USA: English
Psychrometric calculation No calculation
Display resolution 1 decimal
Display Sleep function Enabled, display automatically turns off after 1 minute
Display backlight Off
Displayed parameters %RH and temperature or temperature only
Communication protocol RO-ASCII
Device name Instrument model
Functions Factory default
Humidity / temperature adjustment Enabled
Device write protection Disabled
Limit humidity to 100 %RH Enabled
Out-of-limit value alarm Disabled
Data recording Stopped (loop mode – 10 min. interval)
Major sensor failure alarm Enabled (cannot be disabled)
Simulator mode Disabled
2.13 Data logging
● Function overview:
The main characteristics of the data logging function are as follows:
- Relative humidity values are recorded with a resolution of 0.1%RH
- Temperature values are recorded with a resolution of 0.05˚C / 0.09˚F
- Memory capacity: 20,000 single values or value pairs
- Adjustable log interval: from 5 seconds to 1 hour, in increments of 5 seconds
- Two data recording modes: Loop and Start-Stop
Note: Any recorded data present in the data logger memory is automatically erased whenever a
new recording session is started.