PL-HW Multi-Channel WiFi Thermistor Data Logger Part of the Precise Log Family

• 16-Bit Analog-to-Digital Converter
• Supports 10KΩ NTC Thermistor Sensors
  
• 8 Megabyte Memory Size
• Both USB and WiFi Comm. Interfaces With Baud Rate of 115200 Bps
• Programmable Input Ranges
• Over 10 Years of Battery Life
• Powerful Software for Configuration, Downloading, Plotting, Analysis and Alarm Reporting
• Support Modbus TCP Protocol
• Wide Sampling Interval Selections (One Second to 12 Hours)
• Rugged Aluminum Enclosure

PL-TW is an 8-channel, battery powered, standalone and WiFi-enabled thermistor data logger. Part of the Precise Log family of WiFi data loggers, the PL-TW records eight external thermistors and saves data in 8-MB memory. Embedded WiFi module allows remote data monitoring and downloading. The data logger can be enabled by Modbus TCP protocol and become a Modbus TCP server. 16-bit ADC makes it well suited for science and laboratory applications where precise and accurate measurements are critical. Its aluminum enclosure makes it excellent in the harshest industrial environment.  Simply power the logger in WiFi covered area and access it from your computer for configuration, downloading, graph viewing and more.

Broad 10KΩ NTC Thermistor Support
The output of thermistors is not as standardized as many other temperature sensors.  The temperature/resistance curve which they follow can vary one manufacturer to another as well as one thermistor series to another.  Many thermistor instruments support just one temperature/resistance curve, but the PL-HW works with any 10KΩ NTC thermistor.  It directly supports a variety of common thermistors but you can also configure it to work with different thermistors by entering the thermistor's Steinhart–Hart coefficients (provided by the thermistor manufacturer) or by directly entering temperature and resistances from the thermistor's temperature/resistance curve.

High Data Resolution
The 16-bit analog-to-digital converter meets most high-resolution requirements.

Large Memory Size
The 8-Mega-Byte Memory stores years of measurements,

Easy Access
One Plug & Play USB port makes communications with PC SiteView software super easy. On-board WiFi module creates WiFi access point or connects to local network wirelessly, allowing remote monitoring and downloading.

10-Year Battery Life
The internal lithium battery provides over 10 years of instantaneous logging operation when sampling at an interval of one minute.  The battery does not require re-charging but by using the included USB cable the PL-TW can run from external power preserving the internal power (typically only needed for sampling at high sample rates for extended time periods).

2-IN-1 Design
The logger can operate as portable standalone data logger and be powered by internal battery. Or when powered by external 5VDC power supply, the logger automatically connects to WiFi network and be ready for remote access.

Rugged Physical Housing
The rugged aluminum enclosure makes the PRECISE-LOG data loggers perfect in the harshest industrial environment.

SiteView Software

SiteView is an optional PC based application works with all Precise Log (as well Site Log and iLog ) data loggers for downloading, configuration and data analyzing and plotting. Its user-friendly graphic interface plus powerful functionalities fit both novice and advanced users. The versatility of custom equation and custom-line equation handle complicated measurement requirements. SiteView is compatible with Window XP, Vista, 7, 8, 10 operating systems.

• Real-time view and chart recording replaces chart recording device
• Custom equation and custom-line equation solves scientific and laboratory algorithm difficulties
• Zoom in/zoom out, annotation/label of graph functions provide detailed view of data
• Multiple file loading allows easy data comparison
• Dynamic statistics provides detailed information of current zoomed view
• Scheduled Download automatically backups data regularly to system database
• Export to CSV, TXT, BMP, JPG, TIF, PNG, GIF file formats

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PART NUMBERS	DESCRIPTION
PL-HW	Precise Log Multi-Channel  WiFi Thermistor Data Logger
Accessories
SSV-1	Site View Software for Precise Log, Site Log and iLog families of data loggers

SPECIFICATIONS

Inputs
Connection: Pluggable terminal block for eight external channels
Channels: Eight external thermistors/resistors (10000 ohms NTC thermistor recommended).
Resolution: 0.0018%
Accuracy: +/- 0.2°C (0°C ~ 70°C, 32°F ~ 158°F) ( for 10K NTC thermistor, does not include thermistor probe error)

Alarms
Channel Alarms: Two editable alarm thresholds per channel.
Alarm Indicator: On-board LED becomes red when in alarm condition.

On-board Memory
Size: 8 Mega bytes (4MB readings).
Data Retention: Over 20 years.

Sampling
Sampling Interval: 1 second to 12 hours user selectable.
Logging Mode: Continuous FIFO or Stop recording when memory is full.
Logging Activation: Programmable instant, start delay or field push button activation.

Communications
Interface: (Mini-USB-B (USB-A-mini USB-B Cable included) ,WiFi (USB 5 VDC wall power adapter included)
Baud Rate: 115200 bps.
WIFI Module
  Standard: 802.11b/g/n,
  Frequency Range: 2.412 - 2.484GHz
  Transmit Power: 11-18 dBm
  Receive Sensitivity: -82 to -93 dBm
  Security: WEP/WPA-PSK/WPA2-PSK
  Encryption: WEP64/WEP128/TKIP/AES
  Enabled/Disabled by SiteView software

Battery
Power: Built-in 3.6V Lithium Battery.
Battery Life: 10 years based on 1 minute sampling interval in stand-alone mode.

Software
SiteView (Sold separately): Configuration, downloading, plotting, real-time view, custom calibration and custom equation.
Software Requirement: Computer with 1.0 GHz or faster processor, 1 GB Memory or higher, 10 GB of available hard-drive space or higher, Windows XP with SP2 or later, Vista, Window 7,8,10, At least one USB port or one COM port.

Physical
Material: Aluminum enclosure.
Dimension: 88 X 64.2 X 24 mm (3.46 X 2.53 X 0.95 inches).
Weight: 200g
Mounting: Probe/wall-mount holes for hanging/mounting.

Miscellaneous
LED Indicator
  Tri-Color LED: (can be disabled for power saving)
  Normal Sampling: light green when sampling.
  Alarm: red when sampling.
  Low Battery: amber when sampling.

Operating Environment: -40 to 70°C (-40°F to 158°F), 0 to 95% RH non-condensing.
Clock Accuracy: ±1 minute per month.
Approval: CE, FCC

Logger Memory Capacity