LPMB-1 SITE-LOG High Accuracy Voltage, Current and Temperatrue Data Logger
The SITE-LOG LPMB-1 is a 7-channel, battery-powered, standalone high-accuracy voltage and current data logger designed for industrial, laboratory, research, testing, and process-monitoring applications.
The logger provides:
- 4 voltage input channels
- 3 current input channels
- 1 onboard temperature channel
The voltage channels support programmable ranges of:
- 0 to 20 VDC
- −5 to +5 VDC
The current channels support:
- 4–20 mA
- 0–50 mA
Input signals can come from sensors, transducers, transmitters, process instruments, batteries, power supplies, and other compatible voltage or current sources.
The onboard temperature channel monitors ambient temperature and provides temperature compensation for improved measurement performance.
Recorded data is stored in 8 MB of non-volatile flash memory, providing long-term standalone data recording without requiring a continuously connected computer.
High-Accuracy Voltage and Current Measurement
The LPMB-1 is designed for applications where both voltage and current signals must be recorded by the same instrument.
Channels 1 through 4 are dedicated to voltage measurement, while channels 5 through 7 are dedicated to current measurement.
The logger uses a 16-bit analog-to-digital converter, providing a resolution of 0.0018%.
Onboard Temperature Monitoring and Compensation
The built-in thermistor measures ambient temperature from:
−40°C to +70°C (−40°F to +158°F)
with an accuracy of:
±0.2°C from 0°C to 70°C
The onboard temperature measurement can be recorded along with the external channels and is also used for temperature compensation.
High-Resolution Data Logging
The LPMB-1 uses a 16-bit ADC for high-resolution voltage and current measurements.
Sampling intervals are programmable from:
20 milliseconds to 12 hours
An external power supply is required when the sampling interval is less than 5 seconds.
This wide sampling range allows the same logger to support both relatively fast testing and long-term monitoring.
Standalone Operation and Long-Term Recording
The LPMB-1 operates independently after configuration and stores measurements in 8 MB of onboard non-volatile flash memory.
The memory provides storage for approximately 4 million readings and retains data for more than 20 years.
Logging can be started by:
- Immediate start
- Programmable delayed start
- Field push-button activation
When memory becomes full, the logger can be configured to:
- Stop recording, or
- Continue recording in FIFO mode
The internal lithium battery provides up to approximately 10 years of operation at a 1-minute sampling interval, depending on operating conditions and configuration.
USB Communication and SiteView Software
The LPMB-1 connects directly to a Windows PC through its Plug & Play USB interface.
SiteView software provides tools for:
- Configuring input channels
- Selecting voltage and current ranges
- Configuring logging sessions
- Downloading recorded data
- Viewing real-time measurements
- Displaying graphs and tables
- Configuring alarm thresholds
- Applying custom calibration
- Applying custom equations
- Converting voltage and current signals into engineering units
- Exporting and analyzing recorded data
The LPMB-1 also provides an AUX TTL-level serial communication interface with automatic baud-rate detection from 2400 to 115200 bps.
Alarm and Excitation Control
The LPMB-1 provides configurable alarm and control functions for applications requiring more than basic data recording.
Each channel supports two programmable alarm thresholds.
The available output terminals can be configured for:
- Alarm output
- Excitation control
The onboard status LED provides visual indication of normal sampling, alarm conditions, and low battery status.
Remote Access and Network Integration
The LPMB-1 can be connected to a Microedge Smart-Hub for remote access over an Ethernet network.
Smart-Hub functions as a USB Device Server, allowing the LPMB-1 to be accessed remotely by:
- SiteView
- SiteView-Web
- SiteView SDK
- Pluto
Smart-Hub can also provide:
- RESTful Web API
- Modbus TCP Gateway
This allows LPMB-1 measurements to be incorporated into remote monitoring systems and third-party industrial applications.
Rugged Industrial Design
The LPMB-1 uses a durable aluminum enclosure and a conformal-coated circuit board for additional protection against:
- Moisture
- Corrosion
- Mildew
The logger is designed for operation from:
−40°C to +70°C (−40°F to +158°F)
at:
0–95% RH, non-condensing.
KEY FEATURES
7 External Measurement Channels
Four voltage channels and three current channels allow voltage and current signals to be monitored by the same logger.Onboard Temperature Channel
Built-in thermistor provides ambient-temperature monitoring and temperature compensation.Programmable Voltage Ranges
Voltage channels support 0–20 VDC and −5 to +5 VDC ranges.Programmable Current Ranges
Current channels support 4–20 mA and 0–50 mA signals.16-Bit Data Resolution
High-resolution ADC provides 0.0018% measurement resolution.8 MB Non-Volatile Flash Memory
Stores approximately 4 million measurements for long-term standalone recording.Wide Sampling Interval Selection
Programmable from 20 milliseconds to 12 hours.Long Battery Life
Up to approximately 10 years at a 1-minute sampling interval.USB Communication
Plug & Play USB provides direct communication with SiteView.TTL-Level Serial Communication
AUX interface supports automatic baud-rate detection from 2400 to 115200 bps.SiteView Software Support
Provides configuration, data download, real-time monitoring, plotting, calibration, custom equations, alarms, and analysis.Alarm and Excitation Control
Supports programmable alarm thresholds, MOSFET alarm outputs, and excitation control.Programmable Warm-Up Delay
Excitation warm-up delay can be configured from 10 to 240 seconds.Flexible Logging Modes
Supports immediate start, delayed start, field push-button activation, stop-on-full, and FIFO recording.Remote Network Access
Connect to Smart-Hub for remote access through SiteView, SiteView-Web, SiteView SDK, and Pluto.RESTful API and Modbus TCP Integration
Smart-Hub provides interfaces for integration with compatible third-party software and industrial systems.Rugged Aluminum Enclosure
Conformal-Coated PCB
TYPICAL APPLICATIONS
The LPMB-1 is suitable for:
- 4–20 mA transmitter monitoring
- 0–50 mA current measurement
- Voltage signal recording
- Process instrumentation
- Pressure transmitters
- Flow transmitters
- Level transmitters
- Environmental sensors
- Industrial sensor monitoring
- Battery and power-supply monitoring
- Laboratory testing
- Product validation
- Research
- Equipment monitoring
- Long-term process data acquisition
DOCUMENTS
- SITE-LOG High Accuracy Voltage and Current Data Logger (LPMB-1) Specifications
- SiteView Specifications
| General | |
|---|---|
| Product Name | SITE-LOG High Accuracy Voltage, Current and Temperature Data Logger |
| Model | LPMB-1 |
| Inputs | |
| Connection | Plugable terminal block for seven external channels, excitation controls and alarm outputs |
| Internal Channel | On-board thermistor temperature (-40°C ~ 70°C, -40°F ~ 158°F) |
| CH1 ~ CH4 (Voltage) | Programmable ranges for each channel: 0 ~ 20 VDC, -5 ~ +5 VDC |
| CH5 ~ CH7 (Current): | Programmable ranges for each channel: 4 ~ 20 mA, 0 ~ 50 mA. |
| Resolution | 0.0018% |
| Accuracy | Thermistor: ±0.2°C(0°C ~ 70°C, 32°F ~ 158°F) Voltage channel: ±0.05% @ 25°C for 20V, 10V, 5V channels ±0.1% @ 25°C for 2V channel Current channel: ±0.1% FSR @ 25°C |
| Input Impedance (voltage ch) | > 1 MOhms |
| Load Resistor (Current ch) | 12 Ohms |
| Over voltage/current Protection | up to ±40 VDC for voltage channels up to ±100mA for current channels |
| Alarms | |
| Channel Alarms | Two editable alarm thresholds per channel. |
| Alarm Output | ALARM1 & A2/E terminal strips can be configured as alarm outputs. Alarm-On: MOSFET(N-Channel) switch on Alarm-Off: MOSFET(N-Channel) switch off Max Power: 200mA @ 24VDC |
| Alarm-On Delay | Programmable 0 - 10 minutes delay with 1-minute increment. |
| 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 | 20 milliseconds to 12 hours programmable. (external power supply required if interval less than five seconds) |
| Logging Mode | Stop recording or FIFO when memory is full. |
| Logging Activation | Programmable instant, start delay or field push button activation. |
| Communications | |
| Interface | USB (Mini-USB-B) (USB-A-mini USB-B Cable included) AUX(RJ11) for TTL level RS232 communications. |
| Baud Rate | Auto-detect baud rate from 2400 to 115200 bps on both USB and AUX. |
| Battery | |
| Power | Built-in 3.6V Lithium Battery. |
| Battery Life | 10 years based on 1 minute sampling interval. |
| 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. |
| PCB Treatment | Conformal coating. |
| 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. |
| Others | |
| 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. |
| Excitation Control | A2/E terminal strip can be configured as excitation control output for driving the power of connected devices. Warm-up delay interval settings: 10 to 240 seconds with 10-second increment. |
| Operating Environment | -40 ~ +70 °C (-40 °F ~ 158 °F), 0 ~ 95% RH non-condensing. |
| Clock Accuracy | ±1 mintue per month. |
| Approval | CE, FCC |
Logger Memory Capacity
| Sampling Interval | Enabled Channel | Logging Capacity |
|---|---|---|
| 1 minute | 1 | 8 years |
| 1 minute | 2 | 4 years |
| 1 minute | 8 | 1 year |
| 10 seconds | 1 | 485 days |
| 10 seconds | 2 | 242 days |
| 10 seconds | 8 | 60 days |
| 1 second | 1 | 48 days |
| 1 second | 2 | 24 days |
| 1 second | 8 | 6 days |
| 100 milliseconds | 1 | 4 days |
| 100 milliseconds | 2 | 2 days |
| 100 milliseconds | 8 | 14.4 hours |
Resources:
LPM-1 SITE-LOG Voltage, Current and Temperature Data Logger
SITE-LOG LPM-1 is a 7-channel, battery powered, stand-alone voltage, current and temperature data lo..