LIBERO CE CL CH Operation Manual
1 Safety Instructions
Intended Use
LIBERO CE/CH/CL data loggers are exclusively for commercial use (“business to business") in industrial environments, representing monitoring solutions for temperature and humidity measurement with internal and external sensors. LIBERO CE/CH/CL data loggers are not intended for use with children or in vicinity of children.
If the device is used in a manner not specified by the manufacturer, the protection provided by the device may be impaired!
Battery
Material safety data sheets according to provisions of directive 91/155/EEC and shipping information are available from ELPRO-BUCHS AG. Do not subject the batteries to mechanical stress nor dismantle them. The leaking battery fluid is highly corrosive and can generate severe heat when it comes into contact with moisture or it can ignite fire.
Environmental Conditions
- Temperature: Temperatures exceeding 70°C can damage the battery. For the operation range see specifications on www.elpro.com.
- Water: Device meets requirements of protection class IP54. Only for use in the specified IP protection class; penetrating water or moisture can damage the device. The degrees of protection apply to any position and orientation of the device, regardless of the mounting arrangement.
- Humidity: Operation range 0 ... 100%RH
- Mechanical Force: Violent shocks and impacts can damage the battery (short circuit).
- IR and Steam: Infrared radiation (heat) and superheated steam can damage the surface coating of the casing.
- Microwave: There is a risk of battery explosion if the device is exposed to microwave radiation.
- UV Radiation: Exposure to UV radiation diminishes the stability of the casing.
- Pollution: Pollution of the device can lead to malfunctions. Maximum permissible pollution: Grade 2
Cleaning
For cleaning purpose use a slightly wetted cloth. Do not use thinner, fuel, alcohol or aggressive cleaning detergents, they can damage the casing.
Bluetooth
The product operates in 2.40-2.48 GHz band with a maximum radiated output power of +3.7 dBm.
Distance to the body
The device should be installed and operated with a minimum distance of 20 cm between the device and your body.
2 Quick Start Guides
LIBERO CE
1. Software Download: Download the LIBERO Cx BLE app from the App Store or Google Play.
2. Press Start/ON: Press and hold the “Start/ON” button for 3 seconds.
3. Measurement Mode: The logger is now in measurement mode. The display shows the current temperature and the “Run” symbol.
4. PDF Report: Connect the logger to a PC via USB or use the app to read out the data and generate a PDF report.
5. Read Out: Open the PDF report on your PC or smart device.
6. Visit ELPRO: For more information, visit www.elpro.com.
LIBERO CL
1. Software Download: Download the LIBERO Cx BLE app from the App Store or Google Play.
2. Press Start/ON: Press and hold the “Start/ON” button for 3 seconds.
3. Measurement Mode: The logger is now in measurement mode. The display shows the current temperature and the “Run” symbol.
4. PDF Report: Connect the logger to a PC via USB or use the app to read out the data and generate a PDF report.
5. Read Out: Open the PDF report on your PC or smart device.
6. Visit ELPRO: For more information, visit www.elpro.com.
LIBERO CH
1. Software Download: Download the LIBERO Cx BLE app from the App Store or Google Play.
2. Press Start/ON: Press and hold the “Start/ON” button for 3 seconds.
3. Measurement Mode: The logger is now in measurement mode. The display shows the current temperature and humidity, and the “Run” symbol.
4. PDF Report: Connect the logger to a PC via USB or use the app to read out the data and generate a PDF report.
5. Read Out: Open the PDF report on your PC or smart device.
6. Visit ELPRO: For more information, visit www.elpro.com.
3 System Overview
3.1 LIBERO CE
LIBERO CE is a multi-level and multi-use PDF Logger with USB and Bluetooth® interface for external Pt100 probe. It simplifies storage and shipment processes for products with known stability data. It covers a wide measurement range from -200 °C to +400 °C and monitors temperature of cell and drug deliveries with cryogenic containers, dry ice, or other applications using an external Pt100 probe. It can be used in all cases where the logger is to be mounted outside, also for equipment like refrigerators. A stainless steel bracket can be ordered as an option for easy mounting.
Supporting up to eight temperature alarm zones, MKT, and duration as alarm criteria, LIBERO CE allows you to create temperature profiles for individual products. The alarming function can be switched off and on again if alarming criteria is required, useful for cases where a transportation box has been cleaned or liquid nitrogen has been refilled.
LIBERO CE is reconfigurable and reusable for up to 3 years (depending on Bluetooth® interface usage). The external Pt100 probe and M8 connector enable reliable, superior temperature data transfer. Up to 75,500 temperature values can be stored. Release products with confidence based on the OK or ALARM status on the display. The PDF report can be downloaded via the PC's USB interface or read out to a smart device via the LIBERO Cx BLE app (iOS and Android). The app can be used to start or stop the logger without removing it from your equipment or consignment.
Device Image: LIBERO CE with external probe.
3.2 LIBERO CL
LIBERO CL is a multi-level and multi-use PDF Logger with USB and Bluetooth® interface with an internal temperature sensor for shipment monitoring and monitoring of site and storage conditions. The internal temperature sensor is highly accurate and comes with 100% sensor calibration. Supporting up to eight temperature alarm zones, MKT, and duration as alarm criteria, LIBERO CL allows you to create temperature profiles for individual products. The alarming function can be switched off and on again if alarming criteria is required, useful for cases where a transportation box or refrigerator needs to be cleaned.
LIBERO CL can store up to 75,500 temperature values and has a battery lifetime of up to 3 years (depending on Bluetooth® interface usage). An optional stainless steel bracket is available for easy mounting.
Release products with confidence based on the OK or ALARM status on the display. The PDF report can be downloaded via the PC's USB interface or read out to a smart device via the LIBERO Cx BLE app (iOS and Android). The app can be used to start or stop the logger without removing it from your equipment or consignment.
Device Image: LIBERO CL.
3.3 LIBERO CH
LIBERO CH is a multi-level and multi-use PDF logger with USB and Bluetooth® interface with internal temperature and relative humidity sensor for shipment monitoring and monitoring of site and storage conditions. The internal combined sensor comes with 100% sensor calibration. Supporting up to eight temperature alarm zones, two humidity thresholds, MKT, and duration as alarm criteria, LIBERO CH allows you to create temperature/humidity profiles for individual products. The alarming function can be switched off and on again if alarming criteria is required, useful for cases where a transportation box or storage container needs to be cleaned.
LIBERO CH can store up to 75,500 measurement values (37,750 for temperature and 37,750 for humidity) and has a battery lifetime of up to 3 years (depending on Bluetooth® interface usage). An optional stainless steel bracket is available for easy mounting.
Release products with confidence based on the OK or ALARM status on the display. The PDF report can be downloaded via the PC's USB interface or read out to a smart device via the LIBERO Cx BLE app (iOS and Android). The app can be used to start or stop the logger without removing it from your equipment or consignment.
Device Image: LIBERO CH.
4 Devices - LIBERO CE CL CH
4.1 Functionality and Modes
The following information applies equally to all three LIBERO Cx models unless otherwise noted.
After configuration, the logger records, stores, and evaluates measured values for temperature and relative humidity (LIBERO CH only) with regard to the defined alarm criteria. The display shows the current mode.
In configuration mode, the device can be configured using the free liberoCONFIG software. The display shows “Conf”.
After configuration, the logger is ready to start recording, indicated by “Run” on the display.
The configuration of the device can be changed if required. When plugged into the USB port of a PC, the device is automatically recognized by the liberoCONFIG software and set to “ConF”-mode without pressing any keys.
The logger can be started by pressing and holding (3 seconds) the “Start/ON” key. The display shows the current measured value and the flashing “Run” symbol.
If a temperature- or time-dependent delayed alarm activation is configured, a corresponding note appears in the display after the device is started:
- Temperature-based delay: The delay until the configured temperature threshold is reached is indicated by “dELAY”. The device then automatically switches to alarm activated measuring mode.
- Time-based delay: The display shows the remaining time in minutes before the device automatically switches to alarm activated measuring mode.
Measurement mode without “Alarming ON/OFF” function: Displays current temperature, alarm status, and the flashing “Run” indicator. LIBERO CH also displays humidity.
Measurement mode with “Alarming ON/OFF” function: Displays current temperature, alarm status, “Run” indicator, and “Alarming ON” status. LIBERO CH also displays humidity.
Users can pause the alarm (e.g., for refilling or cleaning) by pressing and holding (3 seconds) the “Stop/Alarming OFF” button. The note “AL on” appears alternating with the measured value, indicating the alarm is suspended. It can be reactivated by pressing and holding (3 seconds) the “Start/ON” button.
The device can be stopped by pressing and holding (3 seconds) the “Stop/OFF” button.
Stop Mode Displays:
- “Make PdF”: Appears immediately after stopping the logger, reminding the user to read out the device. Disappears after the PDF report is created by plugging the device into a computer's USB port.
- “Stop”: Appears after the device has been read out. The device can be restarted or reconfigured via liberoCONFIG software.
4.2 Logger service life / battery runtime
LIBERO Cx BLE loggers are designed for up to 3 years of use. Actual service life is reduced by operation at low temperatures (especially below 0 °C) and frequent Bluetooth® connection use.
Shortening the period of use: The period of use can be deliberately limited to 12 or 24 months by ordering this option from ELPRO as a factory-made configuration. This factory-configured expiry date cannot be reset by the user.
Reaching the end date is indicated by the message “EoL” (End-of-Life); the logger can no longer be used.
Reduction of battery runtime: Depending on the Bluetooth® mode, service life is reduced due to increased energy consumption:
| Bluetooth® mode | Runtime |
|---|---|
| BLE permanently OFF | 36 months |
| BLE temporarily ON (by pressing “Start” button) | 24 months |
| BLE permanently ON | 14 months |
Conditions: Measuring interval: 10 minutes, operating temperature range, customer usage behavior: average assumptions.
Battery warning: A warning symbol in the logger display indicates the battery has reached a minimum level. The logger should no longer be used and cannot be started. If the logger is in “Run” mode, approximately 8-10 days of use remain.
4.3 Workflow
4.3.1 “Alarming ON/OFF” function not configured
The workflow involves the following sequence of modes: Configuration mode → Configure device → Start mode → Measurement mode → Stop mode (“Stop” or “Make PDF”) → Read out.
4.3.2 “Alarming ON/OFF” function configured
The workflow involves the following sequence of modes: Configuration mode → Configure device → Start mode → Measurement mode (“Alarming OFF” or “Alarming ON”) → Stop mode (“Stop” or “Make PDF”) → Read out.
4.4 Technical Specifications
Detailed technical specifications for LIBERO CE, LIBERO CL, and LIBERO CH can be found at the following links:
- LIBERO CE: https://shop.elpro.com/daten/img/Documents/TechSpecs/LIBERO/TS_LIBERO_CE_BLE_EN_web.pdf
- LIBERO CL: https://shop.elpro.com/daten/img/Documents/TechSpecs/LIBERO/TS_LIBERO_CL_BLE_EN_web.pdf
- LIBERO CH: https://shop.elpro.com/daten/img/Documents/TechSpecs/LIBERO/TS_LIBERO_CH_BLE_EN_web.pdf
5 Accessories
5.1 External Pt100 probes for LIBERO CE
LIBERO CE can be used with different applications depending on the sensor element. ELPRO offers standard probes for three main applications:
- Cryogenic shipments and storage
- Dry ice shipments and storage
- Freezer (-25 °C to -15 °C) / fridge (+2 °C to +8 °C) / ambient (+15 °C to +25 °C) shipments and storage
5.1.1 Cryogenic shipments and storage
For cryogenic applications, the LIBERO CE logger is typically mounted directly to the container or lid, using an optional stainless steel bracket, with the sensor leading into the tank. ELPRO offers a turnkey service for mounting and calibration.
Probe: PRO_PT100_ST300D3_M8_CRYO (part number 802287)
| Note | |
|---|---|
| Probe length | 30 cm |
| Probe diameter | 3 mm |
| Temperature range of probe | -200 °C...+200 °C |
| Temperature range Class A | n.a. |
| Temperature range Class B | -50 °C...+200 °C |
| Cable length | 0.05 m |
| Cable diameter | 4.0 mm |
| Litz wire | 4x AWG 22 |
| Cable material | Silicon |
| Cable color | Black |
| Temperature range of cable | Bendable in the range between -60 °C...+90 °C |
Probe: PRO_PT100_ST350D3_M8_CRYO (part number 802288)
| Note | |
|---|---|
| Probe length | 35 cm |
| Probe diameter | 3 mm |
| Temperature range of probe | -200 °C...+200 °C |
| Temperature range Class A | n.a. |
| Temperature range Class B | -50 °C...+200 °C |
| Cable length | 0.05 m |
| Cable diameter | 4.0 mm |
| Litz wire | 4x AWG 22 |
| Cable material | Silicon |
| Cable color | Black |
| Temperature range of cable | Bendable in the range between -60 °C...+90 °C |
5.1.2 Dry ice shipments and storage
For dry ice applications, the LIBERO CE is attached to the outside of the container using an optional stainless steel bracket, with the sensor leading into the tank. ELPRO offers a turnkey service for mounting and calibration.
Probe: PRO_PT100_ST100D4_PTFE1_M8 (part number 802284)
| Note | |
|---|---|
| Probe length | 10 cm |
| Probe diameter | 4 mm |
| Temperature range of probe | -90 °C...+250 °C |
| Temperature range Class A | -30 °C...+250°C |
| Temperature range Class B | -50 °C...+250 °C |
| Cable length | 1 m |
| Cable diameter | 3.5 mm |
| Litz wire | 4x AWG 28 |
| Cable material | PTFE |
| Cable color | White |
| Temperature range of cable | Bendable in the range between -90 °C...+70 °C |
Probe: PRO_PT100_ST100D4_PTFE2.65_M8 (part number 802285)
| Note | |
|---|---|
| Probe length | 10 cm |
| Probe diameter | 4 mm |
| Temperature range of probe | -90 °C...+250 °C |
| Temperature range Class A | -30 °C...+250°C |
| Temperature range Class B | -50 °C...+250 °C |
| Cable length | 2.65 m |
| Cable diameter | 3.5 mm |
| Litz wire | 4x AWG 28 |
| Cable material | PTFE |
| Cable color | White |
| Temperature range of cable | Bendable in the range between -90 °C...+70 °C |
5.1.3 Freezer / fridge / ambient shipments and storage
For temperature monitoring of freezers, refrigerators, or rooms, ELPRO offers two waterproof silicon Pt100 probes with different cable lengths:
Probe: PRO_PT100_P20D5_PLA1_M8 (part number 802290)
| Note | |
|---|---|
| Probe length | 2 cm |
| Probe diameter | 5 mm |
| Temperature range of probe | -50 °C...+105 °C |
| Temperature range Class A | -30 °C...+105 °C |
| Temperature range Class B | -50 °C...+105 °C |
| Cable length | 1 m |
| Cable diameter | 4.0 mm |
| Litz wire | 4x AWG 24 |
| Cable material | Silicon |
| Cable color | Black |
| Temperature range of cable | Bendable in the range between -60 °C...+90 °C |
Probe: PRO_PT100_P20D5_PLA2.65_M8 (part number 802291)
| Note | |
|---|---|
| Probe length | 2 cm |
| Probe diameter | 5 mm |
| Temperature range of probe | -50 °C...+105 °C |
| Temperature range Class A | -30 °C...+105 °C |
| Temperature range Class B | -50 °C...+105 °C |
| Cable length | 2.65 m |
| Cable diameter | 4.0 mm |
| Litz wire | 4x AWG 24 |
| Cable material | Silicon |
| Cable color | Black |
| Temperature range of cable | Bendable in the range between -60 °C...+90 °C |
5.2 Extension of sensor cables
An extension cable with two M8 connectors (1m length) is available to attach the PDF data logger and the probe.
ATTENTION: Total cable length (including sensor and cable tail on the data logger) must not exceed 3 m!
Cable: ECA_PLA_1M_M8 (part number 802282)
| Note | M8 plugs on both ends (male, female) |
|---|---|
| Probe length | n.a. |
| Probe diameter | n.a. |
| Temperature range of probe | n.a. |
| Temperature range Class A | n.a. |
| Temperature range Class B | n.a. |
| Cable length | 1 m |
| Cable diameter | 3.5 mm |
| Litz wire | 4x AWG 28 |
| Cable material | PVC |
| Cable color | Black |
| Temperature range of cable | Bendable in the range between -60 °C...+90 °C |
5.3 M8 connector incl. mounting service on Pt100 probe
ELPRO offers a mounting service, adding an M8 connector to a Pt100 temperature sensor to use any 4-wire Pt100 probe with LIBERO CE.
Connector: CTR_M8_SER (part number 802289)
| Note | M8 connector incl. mounting on any 4-wire Pt100 temperature probe |
|---|---|
| Probe length | Depends on the selected probe |
| Probe diameter | Depends on the selected probe |
| Temperature range of probe | Depends on the selected probe |
| Temperature range Class A | n/a |
| Temperature range Class B | n/a |
| Cable length | Depends on the selected probe |
| Cable diameter | Depends on the selected probe |
| Litz wire | Must be 4-wire |
| Cable material | Depends on the selected probe |
| Cable color | Depends on the selected probe |
| Temperature range of cable | Depends on the selected probe |
5.4 Stainless steel bracket
ELPRO offers an optional stainless steel bracket for mounting LIBERO CE/CL/CH loggers, e.g., to containers for cryogenic applications.
Bracket: BRA_LIBERO CE CL CH (part number 802286)
6 Configuration
liberoCONFIG is free software for configuring LIBERO PDF data loggers. It allows users to define configuration parameters and save them as profiles. A profile contains all settings for the monitoring task and is summarized in the PDF report or a special configuration report generated by liberoCONFIG.
Configuration of a single LIBERO Cx is done with liberoCONFIG. With SmartStart Pack & Go, a profile can be assigned to multiple LIBEROs quickly and safely. SmartStart Pack & Go .exe files can be used on any PC without installation and special drivers.
System requirements:
- Operating system: Windows 7, 8 or 10
- CPU clock frequency: 1.5 GHz
- Memory/RAM: 512 MB
- Hard disk: 100 MB
- Monitor resolution: 800 x 600 pixel
Details regarding configuration of LIBERO Cx can be found in the corresponding manual: https://shop.elpro.com/daten/img/Documents/Operation%20Manuals/LIBERO/OM_LIBEROC_EN_web.pdf
The following section describes differences or additional configuration options for LIBERO CE / CL / CH.
Logging:
“Loop” mode has been added for multiple use of LIBERO CE/CL/CH loggers. When memory capacity is reached, newly measured values continuously overwrite the oldest stored values.
Alarm Conditions:
In the “Alarm Mode” section, the inspection range can be selected. Options include:
- All data: All recorded values are considered for alarm status assessment.
- Last “alarming ON” period only: Only values between the last “Alarming ON” and “Alarming OFF” presses are considered. If “Alarming ON” was the last press, all values since then are considered.
- All “alarming ON” periods cumulative: All measured values recorded during activated alarming phases are considered.
Alarming ON/OFF: If one of the last two options is selected, alarming can be activated (“Alarming ON”) or deactivated (“Alarming OFF”) during measurement mode.
Stop Options:
There are four options to stop data recording:
- Stop when generating the PDF report.
- Stop by pressing and holding the Stop button (3 seconds).
- Stop by pressing both buttons simultaneously while the PDF is being generated.
- Stop mode disabled (logger becomes single-use).
These options can be combined.
Bluetooth® Mode:
To enable operation via the LIBERO Cx BLE app, Bluetooth® mode must be selected:
- Bluetooth® permanently off: No communication with the app.
- Bluetooth® permanently switched on: Communication with the app is possible at all times.
- Bluetooth® temporarily switched on: Interface activated for a short time (30 seconds) when required, by briefly pressing the “Start” key.
Attention: Temporary or permanent activation of Bluetooth® mode leads to a shortening of the battery runtime.
7 Operation via LIBERO Cx BLE App
The ELPRO LIBERO Cx BLE app is a free mobile app for iOS and Android devices. LIBERO data loggers with Bluetooth® Low Energy (BLE) interface connect wirelessly to the app.
The app allows users to start/stop, monitor, and read out LIBERO CE/CL/CH loggers in proximity. It enables quick PDF report downloads without physical contact or USB connection. Measured values and alarms can be monitored, and individual information/notification lines can be added before generating the final PDF report.
Download and use of the app: Available from the Apple App Store or Google Play Store.
Main screen: Displays all loggers in the vicinity. Information shown includes Logger-ID, operating status, actual temperature/humidity, alarm mode/status, battery life, Bluetooth® signal strength, and connection update time.
Main menu: Access to “LIBERO within reach”, “Last LIBERO actions”, “Security settings”, “General settings”, “Privacy policy”, “Quick Start Guide”, “Support”, and “About”.
Displaying loggers: The app displays loggers in the immediate vicinity with a BLE connection. Loggers out of range or with unconfigured Bluetooth® are not displayed. Loggers are ordered by serial number. “Refresh” updates the display. Loggers can be removed by swiping left.
Filtering: The filter function allows selection based on serial number, signal strength, battery level, temperature, humidity, alarm mode/status, and info fields.
Selection of loggers: Loggers can be selected individually or all at once.
Operating steps / Actions: Actions like Start, Stop, Alarm On/Off, PDF Report Download, Show/Set Info Fields can be performed for single or multiple loggers.
Starting a logger: Tap “Start” in the control panel. The logger display shows a flashing “Run” symbol.
Stopping a logger: Tap “Stop” in the control panel. The logger display shows “Make PdF”.
Alarm monitoring: Activated by tapping “Alarm On” (shows alarm bell icon with “ON” status). Deactivated by tapping “Alarm Off” (shows “OFF” status).
PDF Report: Generated and downloaded by tapping “PDF Export”. If the logger was stopped, it displays “Stop”. If downloaded during operation, the logger continues running.
Displaying Info Fields: Tap “Info Fields” in the control panel to view predefined information. New entries can be created via “Set Info-Fields” and are exported to the PDF report.
Last LIBERO actions: Chronological event list of all operations, accessible via the main menu or an icon. Tapping an entry shows details.
Security settings: The app and loggers can be password-protected via liberoCONFIG. Passwords are stored in a list in the app. Options include “App Security Protection” and “Data Logger Security Protection” for configuration access, PDF access, and BLE access.
General settings: Set date format, temperature units (°C/°F), and predefined email addresses for PDF report distribution.
About: Provides information about ELPRO and the app version.
8 Disposal
a) Device: Electronic devices are recyclable and should not be disposed of as household waste. Dispose of the product at the end of its service life in accordance with applicable laws.
b) Batteries: Disposal of used batteries via household waste is prohibited. Batteries are marked with a symbol and chemical symbol for heavy metals (Cd, Hg, Pb), indicating hazardous material. Dispose of used batteries at local collection points.
9 Declaration of Conformity
9.1 EU Declaration
This section contains the EU Declaration of Conformity for LIBERO CE, LIBERO CL, and LIBERO CH, confirming compliance with relevant Union harmonisation legislation, including the Radio Equipment Directive (2014/53/EU) and RoHS Directive (2011/65/EU). It lists harmonized standards and specifications related to electromagnetic compatibility, radio, and electrical safety.
The manufacturer, ELPRO-BUCHS AG, declares conformity under its sole responsibility. The declaration is dated December 9th, 2020.
9.2 FCC/ISED Regulatory notices
Modification statement: ELPRO-Buchs AG has not approved any changes or modifications by the user, as they could void the authority to operate the equipment.
Interference statement: This device complies with Part 15 of the FCC Rules and Industry Canada licence-exempt RSS standard(s). Operation is subject to two conditions: no interference caused by the device, and acceptance of any interference received.
Wireless notice: Complies with FCC and ISED radiation exposure limits for an uncontrolled environment. Antenna installation requires a minimum distance of 20 cm from the radiator and body. The transmitter must not be co-located or operating with any other antenna or transmitter.
FCC Class B digital device notice: Tested and found to comply with limits for a Class B digital device, providing reasonable protection against harmful interference in residential installations. If interference occurs, users are encouraged to correct it by reorienting/relocating the antenna, increasing separation, or connecting to a different circuit. Consult a dealer or technician for help.
FCC (USA) ID: Z45LIBEROCEHL
IC (CAN) ID: 9954A-LIBEROCEHL
