Manual

IN-E-HL-NT-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroLog HL-NT data logger:
instruction manual
Instruction Manual
Document Type
Page
4 of 48
Document title
© 2009-2012; Rotronic AG IN-E-HL-NT-V2_12
Ethernet ports is limited. Direct connection to an Ethernet LAN allows, in principle, an unlimited
number of HygroLog HL-NT to be put on a network monitored by the HW4 software. HW4 allows
any combination of RS-232, USB, Ethernet and RS-485 connections.
When equipped with a docking station, the HygroLog HL-NT can be used together with the
ROTRONIC HW4 software for Windows based PCs (version 2.3.0 or higher). In addition to
providing for the networking of large quantities of data loggers and other instruments, the main
functions of HW4 include:
o Configuration of the HygroLog HL-NT and docking station
o Programming of the HygroLog HL-NT logging function
o Manual or automatic downloading of the data recorded by the HygroLog HL-NT
o On-line data monitoring and direct data recording by the PC
o Automatic generation of graphs and data tables
o Monitoring of the networked instruments and data for alarm conditions
o Alarm reporting
o Maintenance of audit trails
o Calibration and adjustment of the HygroClip 2 probes
o Generation of protocols, electronic signatures, etc.
A high level of protection against network failures can be achieved by logging data directly on the
PC while also recording the data locally on the HygroLog HL-NT with automatic download to the
PC at regular interval of times.
Note: Instructions for using the HW4 software are not included in this manual. These instructions
are shipped separately on the software CD ROM.
1.2 Compatibility with previous models of probes and docking
stations
o The HygroLog HL-NT is designed for use with the HygroClip 2 probes (UART interface)
and is not compatible with the previous generation of HygroClip probes (DIO interface).
o Docking stations designed for the previous generation of HygroClip probes (such as DS-
U1, DS-U4, etc.) are not compatible with the HygroLog HL-NT.
o RS-485 drop-down networks: the HygroLog HL-NT is compatible with previous versions
of the HygroLog NT and with other legacy products. The HygroLog HL-NT cannot be
used in the same RS-485 drop-down as a HF4 or HF5 transmitters or any product that
rely on the RO-ASCII communications protocol.
o Unlike previous versions, The HygroLog HL-NT does not have a remote mode