Libratherm Instruments Private Limited

DATALOG-804 – 8 Channel Temperature/Process Data Logger.

HTL-804 – 8 Channel T + RH Data logger with 2 common High / Low Alarm relay outputs + 16 independent relay drivers + Real time clock + Built in data storage + RS-485 serial interface or RS-232 for serial Dot-matrix printer.HTL-804-U1 – Uses Rotronic make HYGROCLIP-XD sensors.HTL-804-U2 – Uses Libratherm make HTS-440 sensors.HTL-804-U3 – Uses Libratherm make HTS-220 sensors.HTL-804-U4 – Uses any type of T+RH Transmitters giving 4-20mA signals.


Description
Libratherm offers Microcontroller based 8 channel T + RH Data Logger Model HTLOG-804 which is designed for continuous, simultaneous, and very accurate monitoring and logging of temperature and Relative Humidity values at a maximum of 4 different locations. The logged data are stored in the internal memory in real-time and date. The logged data can also be monitored in the online mode on the PC screen and can also be downloaded to the PC in the offline mode. The facility is also available through the additional serial port to directly print the logged or stored data with real-time/date at the programmable PRINT INTERVAL on EPSON or equivalent Serial Dot Matrix printer.
The Model HTL-804 accepts input from standard T + Rh sensors or transmitters giving voltage or current signals. Users can specify the required type of sensor or transmitter based on what suits the application. If the data logging to be carried out on the small chambers or cold storages then only sensors are preferred. But if the sensing to be carried out across the long length and breadth of the warehouse, greenhouse, etc requiring long cables, then T + RH transmitters are preferred.
Other hardware features include 2 nos. of common for all channels high or low relay outputs, 16 nos. of transistor drivers – available to the user on 20 pin FRC connector and cable. FRC compatible 8 channel relay cards are also available. The respective front panel dual-color LEDs show the status of each channel – whether it is High (Red) or Low (green) when compared to their respective set values.
Standard features include programmable display SCAN time, channel SKIP, and HOLD facility with a manual increment of the channel number using a front panel membrane keyboard.
Key Features:

• Highly accurate and sturdy in operation.
• Monitor and Log T+RH parameters at 4 different locations using single HTLOG-804.
• Incorporates 16 bit ADC and 5 digit display.
• Built in real time clock and Memory for data storage up to 1 year.
• Two common Relays and 16 independent relay drivers for High/Low Alarms.
• Front panel dual colour LED indications for Alarm status.
• Serial interface for Printer and / or Computer interface.
• User friendly Computer software to integrate max. 8 HTL-804 for max. 64 channels.
• Applications:
• Monitor and Log/Store at various locations T + Rh values in the cold storage, warehouses, stability chambers, walk-in chambers, HVAC systems like Humidifiers or Dehumidifiers, green houses etc.

Description :
Libratherm offers Microcontroller based Temperature / Process Data logger  Model HTLOG-804                   which is designed for continuous, simultaneous and very accurate monitoring and logging of temperature or process values at maximum 8 different locations.  The logged datas are stored in the internal memory with real time and date. The logged datas can also be monitored in the on- line mode on to the PC screen and can also be down loaded to the PC in the off - line mode. Facility is also available through additional serial port to directly print the logged or stored data with real time/date at the programmable PRINT INTERVAL on EPSON or equivalent serial dot matrix printer.

The Model accepts universal input of standard thermocouples or RTD(Pt-100)/3 wire sensors and voltage or current signals. The type of input for each channel is user selectable from the keyboard, i.e. all 8 channels can be selected for different type of inputs. MSI-804 incorporates 16 bit ADC and offers 5 digit display having the range of 0 to 20000 counts or -10000 to +10000 counts.  Such wide display range makes it possible to display the temperature or process value with the highest degree of accuracy and resolution. For example, using R type thermocouple the temperature can be displayed with 0.1oC resolution from 0.0 to 1768.0oC.  Similarly, any other process value can be precisely displayed with desired resolution within the specified range.

Other hardware features includes, 2 nos. of common for all channels high or low  relay outputs, 16 nos. of transistor drivers – available to the user on 20 pin FRC connector and cable. FRC compatible 8 channel relay cards are also available.  The respective front panel dual colour LEDs shows the status of each channel – whether it is High (Red) or Low (green), when compared to their respective set values.

Standard features include programmable display SCAN time, channel SKIP and HOLD facility with manual increment of the channel number using front panel membrane keyboard.