LPVB-1 SITE-LOG High Accuracy Voltage and Temperature Data Logger
The LPVB-1 SITE-LOG is a rugged 7-channel high-accuracy DC voltage data logger designed for multi-point voltage measurement and monitoring in industrial, laboratory, research, testing, and environmental applications.
It provides seven external DC voltage input channels plus one built-in temperature channel for ambient temperature monitoring and temperature compensation. Each voltage channel can be independently configured for the required input range.
The LPVB-1 is a battery-powered, standalone logger with 8 MB of non-volatile flash memory, allowing measurement data to be recorded in the field and downloaded later through USB. Its rugged aluminum enclosure and conformal-coated PCB provide additional protection for long-term use in demanding environments. Microedge Instruments Inc.
High-Accuracy Voltage Measurement
The LPVB-1 provides seven external channels for measuring DC voltage signals from sources such as:
- Sensors
- Transducers
- Transmitters
- Laboratory equipment
- Industrial instrumentation
- Other compatible DC voltage sources
Each channel supports programmable input ranges of:
- 0 to 20 VDC
- −5 to +5 VDC
High-Resolution Data Logging
The LPVB-1 uses a 16-bit analog-to-digital converter for high-resolution voltage measurements.
Sampling intervals are programmable from:
20 milliseconds to 12 hours
This allows the same logger to be used for both fast testing and long-term monitoring.
For sampling intervals below one second, external power is required.
Standalone Operation and Long-Term Recording
Recorded data is stored in 8 MB of onboard non-volatile flash memory and retained even when external power is removed.
Depending on the sampling interval and number of enabled channels, the logger can record from hours to years of data.
The logger supports:
- Stop logging when memory is full
- FIFO logging mode
- Immediate logging
- Delayed start
- Field push-button activation
With a 1-minute sampling interval, the internal battery can provide up to 10 years of operation, depending on usage and operating conditions.
USB Communication and SiteView Software
The LPVB-1 connects directly to a computer through USB.
SiteView software provides the tools required to:
- Configure logging sessions
- Select voltage input ranges
- Download recorded data
- View real-time readings
- Display data in graph and table formats
- Configure alarms
- Apply custom calibration and custom equations
- Convert measured voltage into engineering units
- Export and analyze recorded data
SiteView is sold separately.
Alarm and Excitation Control
The LPVB-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
Although the LPVB-1 is a USB-based data logger, it can also be accessed remotely over an Ethernet network by connecting it to a Microedge Smart-Hub.
Smart-Hub allows the LPVB-1 to be accessed through:
- SiteView
- SiteView-Web
- SiteView SDK
- Pluto
Smart-Hub also provides:
- RESTful Web API
- Modbus TCP Gateway
This allows LPVB-1 voltage measurements to be integrated with third-party software, PLCs, HMIs, SCADA systems, and other industrial monitoring platforms.
Rugged Industrial Design
The LPVB-1 is housed in a durable aluminum enclosure.
Its circuit board is protected with conformal coating to help resist:
- Moisture
- Corrosion
- Mildew
The logger is designed for operation from:
−40°C to +70°C (−40°F to +158°F)
with up to:
95% RH, non-condensing.
Key Features
- 7 external DC voltage input channels
- 1 built-in temperature channel
- Programmable 0–20 VDC and −5 to +5 VDC input ranges
- 16-bit analog-to-digital converter
- 8 MB non-volatile flash memory
- 20 ms to 12 hr programmable sampling interval
- USB communication
- AUX TTL-level serial communication
- Programmable alarm thresholds
- Alarm output and excitation control
- Stop or FIFO logging mode
- Immediate, delayed, or push-button logging activation
- Up to 10 years of battery life at a 1-minute sampling interval
- Rugged aluminum enclosure
- Conformal-coated PCB
- SiteView software support
- Remote Ethernet access through Smart-Hub
- RESTful Web API and Modbus TCP integration through Smart-Hub
Typical Applications
The LPVB-1 is suitable for:
- Industrial voltage monitoring
- Sensor and transmitter output logging
- Laboratory testing
- Research and development
- Equipment and process monitoring
- Battery and power-system testing
- Product testing and validation
- Long-term voltage recording
- Multi-point DC voltage measurement
Documents
| General | |
|---|---|
| Product Name | SITE-LOG High Accuracy Voltage and Temperature Data Logger |
| Model | LPVB-1 |
| Inputs | |
| External Input Channels | 7 DC voltage input channels |
| Built-in Temperature Channel | 1 onboard thermistor temperature channel |
| Built-in Temperature Range | −40°C to +70°C (−40°F to +158°F) |
| Input Connection | Pluggable terminal block for seven external channels, excitation control, and alarm outputs |
| Programmable Input Ranges | 0 to 20 VDC; −5 to +5 VDC |
| Resolution | 0.0018% |
| Temperature Accuracy | ±0.2°C from 0°C to 70°C |
| Voltage Accuracy | ±0.05% FSR @ 25°C |
| Input Impedance | > 1 MOhms |
| Over-voltage Protection | Up to ± 40VDC |
| Alarm Functions | |
| Channel Alarm Thresholds | Two programmable alarm thresholds per channel |
| Alarm Outputs | ALARM1 and A2/E terminals can be configured as alarm outputs |
| Alarm Output Type | N-channel MOSFET switch |
| Alarm ON | MOSFET switch ON |
| Alarm OFF | MOSFET switch OFF |
| Maximum Alarm Output | 200mA @ 24 VDC |
| Alarm Delay | Programmable from 0 to 10 minutes in 1-minute increments |
| Alarm Indicator | Status LED flashes red during sampling when an alarm condition is active |
| On-board Memory | |
| Flash Memory | 8 MB (4MB readings) non-volatile flash memory |
| Data Retention | More than 20 years. |
| Memory-Full Options | Stop logging or FIFO mode |
| Sampling and Logging | |
| Sampling Interval | Programmable from 20 milliseconds to 12 hours Maximum number of enabled channels: 20 ms sampling interval: 1 channel 30 ms sampling interval: 2 channels 40 ms or longer sampling interval: up to 8 channels An external power supply is required when the sampling interval is less than 1 second. |
| Fast Sampling Power Requirement | External power is required when the sampling interval is less than 1 second |
| Logging Modes | Stop when memory is full or continue in FIFO mode |
| Logging Activation | Immediate start, delayed start, or field push-button activation |
| Communications | |
| USB Interface | Mini-USB-B |
| USB Cable | USB-A to Mini-USB-B cable included |
| AUX Interface | RJ11 TTL level serial communication |
| Baud Rate | Automatically detected from 2400 to 115200 bps on USB and AUX interfaces |
| Remote Network Access | Available through Microedge Smart-Hub |
| Battery and Power | |
| Internal Battery | Built-in 3.6V Lithium Battery. |
| Battery Life | Up to 10 years at a 1-minute sampling interval, depending on usage and operating conditions |
| External Power | 5 VDC through USB |
| Software | |
| Software | SiteView (Sold separately) |
| Functions | Logger configuration, data download, graphing, real-time monitoring, custom calibration, custom equations, alarm configuration, and data analysis |
| Operating Systems | Windows 8, 10 and 11 |
| Computer Requirement | 1.0 GHz or faster processor; 1 GB RAM or higher; 10 GB available storage or higher |
| Required Interface | At least one available USB port |
| Physical Specifications | |
| Enclosure Material | Aluminum |
| PCB Protection | Conformal coating. |
| Dimension | 88 X 64.2 X 24 mm (3.46 X 2.53 X 0.95 inches) |
| Weight | 200g |
| Mounting | Integrated holes for wall or equipment mounting |
| LED Indicators | |
| The tri-color status LED can be disabled to reduce power consumption. | |
| Green Indication | Normal sampling |
| Red Indication | Alarm condition |
| Amber Indication | Low battery |
| Excitation Control | |
| The A2/E terminal can be configured as an excitation-control output for controlling power to an externally powered sensor or device. The excitation warm-up delay is programmable from: 10 to 240 seconds in 10-second increments | |
| Operating Environment | |
| Operating Temperature | -40 ~ +70 °C (-40 °F ~ 158 °F) |
| Operating Humidity | 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 |
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