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Rotronic HygroLog HL20 User Manual

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IN-E-HL20-V1_16
Document code
HygroLog HL20 and HL21 data logger:
User Guide
Document title
HygroLog HL20 and HL21 Data Logger
© 2015; Rotronic AG
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Bassersdorf, Switzerland
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Instruction Manual
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IN-E-HL20-V1_16
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Summary of Contents for Rotronic HygroLog HL20

  • Page 1 Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 1 of 23 Document title HygroLog HL20 and HL21 Data Logger User Guide © 2015; Rotronic AG IN-E-HL20-V1_16 DataLoggerStore 1.877.766.5412...
  • Page 2 Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 2 of 23 Document title Table of contents: Overview..........................4 General ..........................4 General description ........................ 5 Models ..........................5 Required accessories ......................
  • Page 3 Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 3 of 23 Document title Applicability: This manual is valid for instruments with firmware version 3.x or higher. Changes in the last character of the version number reflect minor changes in the internal software of the instrument that do not affect the manner in which the instrument should be operated.

  • Page 4: Overview

    Configuration of the HL20 and HL21, as well as the downloading and viewing of recorded data, requires a PC with the ROTRONIC HW4 software installed as well as a service cable such as the AC3006...

  • Page 5: General Description

    The following accessories are required in order to be able to configure the logger and to download and view the recorded data: o Cable AC3006 or equivalent (plugs into a USB port of the PC) o PC with the ROTRONIC HW4 software installed (version 2.4.0 or higher) © 2015; Rotronic AG IN-E-HL20-V1_16 DataLoggerStore 1.877.766.5412...

  • Page 6: Batteries

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 6 of 23 Document title Batteries All models ship with three AA batteries which must be inserted first (see battery replacement).

  • Page 7: Memory

    One end of the cable plugs into the service / data connector. The other end plugs into the USB of a PC with the ROTRONIC HW4 software installed. See “Initial start-up” for the location of the service / data connector.

  • Page 8: Optional Display

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 8 of 23 Document title Optional display The optional LC display has a backlight which can be enabled or disabled when configuring the data logger.

  • Page 9: Configurable Settings

    Configuration of the data logger by the user and access to its functions requires a PC with the ROTRONIC HW4 software (version 2.4.0 or higher) installed. Service cable AC3006 is used to connect the service / data connector to a USB port of the PC.

  • Page 10: Factory Default Settings

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 10 of 23 Document title 2.11.4 Display-Sleep function Using the Display Sleep function can substantially extend the lifetime of the battery. When the Display Sleep function is active, the LC display of the data logger stays blank.

  • Page 11: Data Logging

    The data logger has an internal real time clock that is used to associate a date and time stamp with each data record. When data recording is either started or stopped using the ROTRONIC HW4 software, the real time clock is automatically synchronized with the PC clock.

  • Page 12: Operation

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 12 of 23 Document title Operation Front panel with optional display Status indicator (LED) Function key The LC display has a backlight which can enabled or disabled as part of the data logger configuration.

  • Page 13: Initial Start-Up

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 13 of 23 Document title Initial start-up 3.2.1 Battery compartment The battery compartment is located on the back panel and can be opened after loosening the screw...
  • Page 14 After installing the HW4 software and prior to running HW4, connect cable AC3006 to a USB port of the PC. The PC will detect the cable and ask for the appropriate driver. The ROTRONIC USB driver (ftdibus.inf) is located in a folder named USB_Driver which is in the HW4 installation folder.

  • Page 15: Recording And Displaying Data (Models Without Display)

    5 seconds The ROTRONIC HW4 software is required to view the measured or calculated data on a PC monitor. Connect the data logger to the HW4 PC as explained under “Initial Start-up”. HW4 is also required to download and save the recorded data to disk.

  • Page 16: Practical Advice For Measuring Temperature And Humidity

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 16 of 23 Document title Practical advice for measuring temperature and humidity The most common source of error when measuring relative humidity is a difference between the temperature of the probe and the temperature of the environment.

  • Page 17: Maintenance

    Long term stability of the ROTRONIC Hygromer humidity sensor is typically better than 1 %RH per year. For maximum accuracy, calibration of the HL20 should be verified every 6 to 12 months.

  • Page 18: Technical Data

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 18 of 23 Document title Technical data Specifications General HL20 / HL21 Device type Humidity-temperature data logger with internal sensor(s) Battery type 3 x AA (1.5 V) alkaline...
  • Page 19 Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 19 of 23 Document title Service and data connector HL20 / HL21 Interface type UART (Universal Asynchronous Receiver Transmitter) Maximum service cable length 5 m (16.4 ft)

  • Page 20: Dew Point Accuracy

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 20 of 23 Document title Dew point accuracy The HL20 can be configured to calculate either the dew point or frost point based on the measurement of relative humidity and temperature.

  • Page 21: Accessories

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 21 of 23 Document title Accessories For accessories and parts such as the HW4 configuration software, service cables, calibration accessories and spare dust filters, please see document E-M-HC2-accessories.

  • Page 22: Supporting Documents

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 22 of 23 Document title Supporting documents Document File Name Contents E-M-HC2-accessories Accessories and parts for probes, indicators and transmitters...

  • Page 23: Document Releases

    Rotronic AG IN-E-HL20-V1_16 Bassersdorf, Switzerland Document code Unit HygroLog HL20 and HL21 data logger: Instruction Manual User Guide Document Type Page 23 of 23 Document title Document releases Doc. Release Date Notes Mar. 5, 2010 Original release Jun. 20, 2010 Updated document to HW4 software v.3...

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