LEYRO LCA 30 User manual

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
www.leyroinstruments.com 1
LCB 30 y LCB 50
LCA 30 &LCA 50
ADVANCED MICRO
CALIBRATION BATH
MANUAL

MICROBATH CALIBRATION TEMPERATURE LCB 30/50
Leyro Instruments® doesn’t accept warranty and liability claims neither upon this
publication nor in case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The
content will be revised on aregular basis. These changes will be implemented in later
versions. The described products can be improved and changed at any time without
prior notice.
Version manual: 2.05
©Copyright Leyro Instruments ®All rights reserved.

MICROBATH CALIBRATION TEMPERATURE LCB 30/50
INDEX
ADVANCED MICRO
CALIBRATION BATH
TEMPERATURE LCA 30/50

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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INDEX
1. General Information
1.1. Symbology
2. Safety
2.1. Use as planned
2.2. Staff qualifications
2.3. Personal protective equipment
2.4. Specific Risks
2.5. Safety instructions for using calibration liquids
2.6. Explanation of symbols
3. LCA 30 and 50 Micro calibration baths
4. Design and function
4.1. Description
4.2. Supply volume
4.3. Overview of the different models of the device
4.4. Isometric views of the advance micro calibration bath temperature
5. Transport, packaging and storage
5.1. Transport
5.2. Packaging
5.3. Storage
6. Commissioning, operation
6.1. Checking the temperature sensors
6.2. Starting Procedure
6.3. Starting the Micro calibration bath
6.4. Viewing the reference temperature and the nominal temperature
6.5. Regulation of reference temperature to the maximum
6.6. Operating Position
6.7. Inner sleeves
6.8. Preparation of micro calibration bath
6.8.1. Properties of calibration liquids
6.8.2. Filling the micro calibration bath
6.8.3. Operating the magnet stirrer and basket

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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7. Handling the micro bath
7.1. Operating in calibration mode in each operating mode
7.2. Starting Screen
7.3. Modification of the set point
7.4. Record data / Logging
7.5. Failures
7.6. Menu
8. Profiles
9. PT 100
10. Cooling Micro-bath Calibration
11. Maintenance, cleaning and Re calibration
11.1. Maintenance
11.2. Cleaning
11.2.1. Cleaning the micro calibration bath
11.2.2. Cleaning of the fan grille
11.2.3. Internal cleaning of the Calibration bath
11.2.4. External cleaning of the Calibration bath
11.3. Re calibration
12. Accessories included LCB 30/50
10.1. Additional options
13. Disassembly, Return and disposal of waste
12.1. Disassembly
12.2. Return
12.3. Disposal of waste
14. Failures
15. Disassembly, Return and disposal of waste
15.1. Disassembly
15.2. Return
15.3. Disposal of waste

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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1. General Information
•This instruction manual provides important information about the instrument operation. In order to work with
this instrument safely it is essential to comply with all safety and handling instructions provided
•Always comply with the regulations on accident prevention and safety rules in force at the place of use of the
instrument.
•The instruction manual is an integral part of the instrument and must be stored in the vicinity thereof so
specialized staff can refer to it at any time
•The qualified personnel must have read and understood the instruction manual before starting any work
•The manufacturer is discharged from any liability for damages caused by usage not according to the intended
purpose of use, non-observance of this manual, handling by insufficiently qualified personnel as well as
unauthorized modification of the instrument
•General conditions of sale included in the sales documentation apply.
•Technical modifications reserved
•Factory calibration and calibration by the Spanish association of calibration (ENAC / ISO 17025) are
performed in accordance with international standards
For more information refer to:
- Web page: www.leyro.net
- Relevant technical sheet: LCA 30, LCA 50
- Technical service: [phone]
[e-mail]
1.1. Symbology
DANGER
Indicates an immediately dangerous situation which causes death or serious injury if not
avoided
WARNING
It indicates a potentially dangerous situation which may cause death or serious injury if
not avoided
WATCH OUT
It indicates a potentially dangerous situation which may cause death or minor or
medium injury or material or environmental damage if not avoided
INFORMATION
Marks useful tips and recommendations as well as information for efficient and fault-
free use
DANGER
Indicates hazards caused by electric current. There is a risk of serious or deadly
injuries if safety instructions are not observed
WARNING
It indicates a possibly dangerous situation which may cause burns due to hot surfaces or
liquids if not avoided

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
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2. Safety
WARNING
Switch off the instrument at ambient temperature (approximately 25ºC / 77ºF)
Before installation commissioning and operation make sure you have selected the appropriate
micro calibration bath respect to measuring range, version and specific measurement conditions.
Risk of serious injury and / or property damage if not avoided.
The different chapters of this manual contain other important safety instructions observed
2.1. Use as planned
The micro calibration bath is a portable unit for technical service, industrial and laboratory tasks.
Leyro Instruments’ micro temperature baths or micro calibration baths are provided for calibrating
thermometers, switches / thermostats thermos, pyrometers electrical resistance and
thermocouples.
The product has been designed and built only for the purpose described here and should be used
in accordance to it. Meet the technical specifications of this manual. An inappropriate handling or
use of the equipment is not in accordance with the technical specifications requires the immediate
service and verification by an authorized Leyro Instruments technician.
Handle the electronic precision instrument with due diligence (protects against humidity, strong
impacts magnetic fields, static electricity, extreme temperatures; Do not introduce any objects into
the openings instrument). Pins must be protected against dirt.
If the instrument is moved from a cold to a warm environment, a malfunction due to condensation
can occur. In this case you have to wait until the temperature of the instrument suits the room
temperature before putting it back into operation
No claim due to inappropriate handling is admitted.
2.2. Staff qualification
WARNING
Risk of injury due to insufficient qualification!
Improper handling can cause considerable personal and property damage. The activities
described in this manual should be performed only by qualified personnel with the appropriate
qualifications.
Specialized staff
Because of their professional training, their knowledge, control and measurement technology, as
well as their experience and knowledge of regulations, standards and guidelines in the country of
use, specialized staff is able to perform the works described and recognize possible dangers by
themselves.
Some specific usage conditions require additional knowledge about aggressive environments.

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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2.3. Personal protective equipment
The personal protective equipment protects qualified personnel from hazards which may harm
their health and safety during work. The specialized personnel must wear personal protective
equipment during the different works on and with the instrument.
¡Comply with the indications about personal protective equipment in the work area!
The owner must provide personal protective equipment.
Wearing protective glasses!
These protect the eyes from projected parts and splashes.
2.4. Specific Risks
WARNING
In the case of dangerous substances to be measured, e.g. oxygen, acetylene, flammable toxic
substances, as well as in refrigeration premises, compressors, etc., the relevant provisions must
be observed in each case, plus all general rules.
DANGER
Risk of death by electric current. There is direct danger of death from touching live parts
•The installation and assembly of electric products must only be performed by a qualified
electrician
•Before replacing the fuse circuit breakers, cleaning and maintenance / conservation and in
the case
of danger, disconnect the micro calibration bath network by removing the power cord from
the electrical outlet.
WARNING
Residual media in dismounted instruments can cause risks to people, the environment and
installation. Take appropriate precautions.
Overheating protection
WARNING
For your safety and the micro calibration bath is equipped with a protection on independent
temperature that disconnect the power supply of heating in case of excessive temperature inside
the housing. After cooling, must send the micro bath to control to Leyro Instruments.
WARNING
The micro calibration bath is designed as a product of measurement and regulation. You need to
take further protective measures if the micro calibration bath for applications not explicitly
mentioned in this manual is used.
Do not use the micro calibration bath in atmospheres hazardous (flammable or explosive
atmosphere)
If a malfunction of micro calibration bath can cause personal injury or property damage, it is
necessary to ensure the subsequent installation of electromechanical protection devices.

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
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2.5. Safety instructions for using calibration liquids
Calibration liquid water
Only use distilled water, otherwise Tartar forms and micro bath deposit gets dirty.
Calibration liquid silicone oil
WARNING
•Only use the silicone oil recommended in this manual
•Read the safety data sheet before starting to work with silicone oil. The data sheet is
available from the manufacturer or distributor
•Ensure that the room is well ventilated when working with silicone oil because harmful
substances may escape.
•Because the silicone oiling is hygroscopic, always close the micro bath with the transport
cover after use.
•The transportation cover is equipped with a safety valve. If the micro calibration state is
closed in hot condition, unacceptable pressures may occur, to avoid overpressure that can
destroy the liquid bath; the safety valve is activated with an accuracy of about 2.5 bars. Hot
steam may escape.
Wearing safety glasses!
Make sure that the silicone oil does not get in touch with the eyes
WARNING
Risk of burns
Before transporting or touching the micro-bath it is necessary to ensure that it is to
sufficiently cool because otherwise there is a risk of burns
2.6. Explanation of Symbols
¡It is absolutely necessary to read the instruction manual before
installation and commissioning of the equipment!
EC European Community
Instruments with this mark comply with applicable European
directives.

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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3. LCA 30 and 50 Micro calibration baths
(1) AT 55 ºC / 131 ºF below ambient temperature.
(2) The probe of the reference thermometer with which measurement is made has a diameter of
6mm at an ambient temperature of 20 ºC ± 3 ºC / 68 ºF ± 5.4 ºF.
(3) To change the unit of measurement of the temperature from degrees Centigrade to degrees
Fahrenheit, contact with Leyro Instruments.
LCA 30
LCA 50
Temperature range
-35 … 165 ºC / -31 … 329 ºF (1)
30 … 225 ºC / 86 … 437 ºF
Accuracy
± 0.1 ºC / 0.2 ºF
± 0.1 ºC / 0.2 ºF
Uniformity
± 0,05 ºC / 0.09 ºF
± 0,05 ºC / 0.09 ºF
Screen Resolution
0.1, 0.01, 0.001 ºC / ºF
0.1, 0.01, 0.001 ºC / ºF
Heating time
- 5 to 100 ºC: 12 min.
23 to 212 ºF: 12 min.
30 to 220 ºC: 42 min.
86 to 428 ºF: 42 min.
Cooling time
25 to - 30 ºC: 48 min. (2)
77 to - 22 ºC: 48 min. (2)
220 to 100 ºC: 35 min.
428 to 212 ºC: 35 min.
Immersion depth
190mm
190mm
Volume
Approximately 0.7 liters
Approximately 0.7 liters
Tank dimensions
60x190 mm
60x190 mm
Power
88 A 264 VAC, 45-65 HZ
88 A 264 VAC, 45-65 HZ
Electricity consumptions
310 W MAX
320 W MAX
Connection cable
AC 320 for Europe
AC 320 for Europe
Instrument dimensions
280x370x400 (ANXAlxP)
280x370x400 (ANXAlxP)
Weight
15,2 kg
13,2 kg
Silicone oil
Temperature range
Flashpoint
LCA 30
LCA 50
AC 10
- 30...160 ºC / - 22…320 ºF
170 ºC / 338 ºF
Recommended
Not recommended
AC 20
- 20…200 ºC / - 4…392 ºF
240 ºC / 464 ºF
Recommended
Recommended
AC 50
30...220 ºC / 86…428 ºF
280 ºC / 536 ºF
Not recommended
Recommended
AC 100
70…288 ºC / 158…550 ºF
315 ºC / 599 ºF
Not recommended
Recommended

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
LCA 30/50
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4. Design and function
4.1. Description
The micro calibration bath is a portable unit for technical, industrial service task at the laboratory. Leyro
Instruments’ micro calibration baths are provided for calibrating thermometers, switches / thermostats,
electrical resistance pyrometers and thermocouples. The operational safety of the equipment is only
guaranteed when used as planned (control of temperature sensors).
The limit values specified should not be exceeded under any circumstances (see Chapter 3).
The corresponding equipment must be selected according to the application. The product is then
properly connected and tests must be conducted0 and monitor the proper maintenance of all
components.
The product is manufactured in several versions. The version is indicated on the nameplate on the
micro calibration bath.
4.2. Supply volume
The micro calibration baths are shipped in a special safety packaging. The packaging must be kept to
send the micro calibration bath safely to the manufacturer for repair or recalibration.
Standard supply volume of the micro calibration bath model LCA.
Micro calibration bath
Transport cover
Basket for sensor
Magnetic stirrer
Power connection cable
Calibration certificate
Instructions Manual
Compare by packing list if all parts have been delivered.
WARNING
Use only the supplied power cable
4.3. Overview of the different models of the device
Both the advanced calibration bath LCA 30 (heat / cold) and LCA 50 (heat) has the following
characteristics:
The micro calibration bath is comprised of sturdy steel painted grey and provided with a
carrying handle.
The back contains a bore accessible from above for the introduction of mass.
The liquid bath includes heating and cooling components for determining the reference
temperature.
The bath liquid has a thermal insulation.
The front of the envelope contains the entire electronic control module for adjusting the
reference temperature and a potentiometer.
For handling heating or cooling towers networks semiconductor (SSR) are used.
On the front panel is the controller.
The micro calibration bath further comprises a turning knob to control the stirring speed.

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4.4. Isometric views of the advance micro calibration bath temperature
Front and top
At the top of the calibration is the refill opening (60 mm x 110m).
The controller with the display and control elements is located on the front of the micro bath.
Block
Potentiometer for the stirrer
PID Controller
USB
PT 100 external connection
Ethernet
USB

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Rear of the instrument
At the rear of the instrument is the nameplate with the most important information about the specific model.
Bottom of the instrument
The air inlet must not be blocked in any way.
Fan 1
Power connection box
with main switch
Model Sticker
Main switch

ADVANCED MICRO CALIBRATION BATH TEMPERATURE
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5. Transport, packaging and storage
5.1. Transport
Check if the micro calibration bath shows any damage caused during transport. Report evident
damages immediately.
5.2. Packaging
Do not remove the packaging until just before installation.
Keep the packaging as it is the ideal protection during transport (e.g., if the installation site changes or if
the product is shipped for possible repairs).
5.3. Storage
Permissible conditions at the place of storage
Storage temperature: -10 ... + 60ºC.
Humidity: 30 ... 95% RH (non-condensing).
Avoid the following
Direct sunlight or proximity to hot objects.
Mechanical vibration, mechanical shock (sudden standing).
Soot, steam, dust and corrosive gases.
Potentially explosive environment, flammable atmospheres.
6. Commissioning, operation
6.1. Checking the temperature sensors
To check the temperature sensors, connect a measuring instrument distinct of the checking sensor. By
comparing the temperature indicated on the external measuring instrument with the reference
temperature, you can check the status of the checking sensor. Watch that the sensor requires little time
to reach the temperature.
WARNING
Thermocouples with grounding cannot be calibrated because they are grounded, so
measurements could lead to erroneous results.
6.2. Starting Procedure
If the calibrator is not used for a long period, it is possible that moisture penetrates in the heating towers
due to the materials used (magnesium oxide). After transportation or storage of micro-bath in humidity
environment, heating towers must be preheated slowly. During the drying process it is assumed that
the micro-bath has not yet reached the required isolation voltage for the protection class.
6.3. Starting the Micro calibration bath
1) Connect the instrument to the power.
2) Press the switch on. The controller is activated.
3) After about 30 seconds, activation has been completed and the calibration mode is automatically
displayed. Mounted heating and cooling towers, regulate micro-bath’s temperature to match the
adjusted nominal temperature on the controller.
4) Activate the magnetic stirrer bar using the potentiometer, turning it to the right completely (100%).

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6.4. Viewing the reference temperature and the nominal temperature
First page
In the red indicator, which is the internal PT 100 appears the following:
- Process Value (PV): Indicates the current temperature of the equipment.
- Set Point (SP): Indicates the nominal temperature that the equipment must control.
After reaching the nominal temperature, the emission of the energy generated by the micro-
bath continues with start impulses in order to keep stable the level of the temperature inside.
.Second Page
In the blue indicator, which is the external PT 100 appears the following:
- Process Value (PV): Indicates the current temperature of the equipment.
- Set Point (SP): Indicates the nominal temperature that the equipment must control.
After reaching the nominal temperature, the emission of the energy generated by the micro-
bath continues with start impulses in order to keep stable the level of the temperature inside.
Third Page
The operation of this page is the same that the previous one but with the difference that in this
screen appear the Internal and External PT 100.
6.5. Regulation of reference temperature up to the maximum
An orange bar expresses, in percentage, the heating power and a blue one the cooling.
6.6. Operating position
The vertical service position of the micro calibration bath is optimal as this position guarantees the
ideal distribution of the temperature in the micro-bath.
The position should never be horizontal.
6.7. Inner sleeves
After use remove the inner sleeve with the aid of a tool for sleeves and then proceed to cleaning. This
prevents sleeves from adhering to the micro-bath.
6.8. Preparation of micro calibration bath
To achieve maximum accuracy of a micro calibration bath, fill with an appropriate calibration liquid.
6.8.1. Properties of calibration liquids
Due to the specific features of the different calibration liquids different calibration results are obtained.
A compensation of calibration liquids should be performed, even in factory by the manufacturer if
necessary.
Recommended calibration liquids for the different temperature ranges:
Water as calibration liquid
Use only distilled or demineralized water. Otherwise tartar is formed and the deposit of micro bath
gets dirty.
Silicone oil as calibration liquid
Only use the silicone oil recommended in this manual.
Ensure that the room is well ventilated when working with silicone oil because harmful
substances may escape.
Because the silicone oil is hygroscopic, always close the micro bath after use with the transport
cover.
Only use clean calibration liquids. Checking the temperature sensors and other temperature
measuring means may generate dirt in the fluid .This calibration can cause abrasions dirt on the
floor of the tank caused by movement of the rotary magnetic stirrer.

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¡Wearing protective glasses!
Ensure that the silicone oil does not come into contact with eyes.
Clean the trunk.
Clean sensors before performing the calibration.
Replace worn-out magnetic stirrer.
Replace the tainted and muddy calibration liquid.
6.8.2. Filling the micro calibration bath
1. Remove the cover transport LID first.
2. Insert the testers in the basket for the sensor.
3. Fill the trunk with calibration liquid.
The following maximum filling heights are recommended by type:
Micro bath type
Maximum filling height
LCA 30
150 mm
LCA 50
150 mm
The following aspects have to be taken into account in terms of the maximum filling height:
Measure from the bottom of the basket for the sensor.
No tank filled.
Leyro Instruments standard filling medium.
Filling from the Factory with the optimum height.
The transport lid is equipped with a safety valve. If the
micro-calibration bath is closed in a hot state, inadmissible
pressures may occur. To avoid the overpressure that can
destroy the liquid bath, the safety valve is activated with a
precision of approximately 2.5 bars. In this way, hot
vapours can escape.
6.8.3. Operating the magnet stirrer and basket
The maximum homogeneity is obtained with the magnetic stirrer bar at maximum speed.
Adjust the agitation speed with the potentiometer, to the right the speed is increased and to
the left it is decreased.
The basket is removable.
The magnetic stirrer bar is a wear part.
Magnetic stirrer inside
and basket
Safety valve

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7. Handling the micro bath
Angular sensors, sensors with larger diameters or with special designs can be calibrated in a micro-bath. That's why
bathrooms are the most appropriate tool. The liquid circulates with the help of a magnetic stirrer, ensuring a very
good temperature distribution in the bath. The liquids used are selected based on the desired calibration
temperature.
The micro-bath is heated or cooled until the desired calibration temperature is reached. When the temperature is
stable, the temperature probes to be calibrated are compared with the reference thermometer
7.1 Operating in calibration mode in each operation mode
Operation mode of operation
The equipment must be turned off
Place the magnetic stirrer bar and the basket for the sensor
Fill the calibration micro bath with the necessary fluid
Switch on the equipment
Activate the magnetic stirrer bar with the potentiometer
Introduce probes to calibrate
Adjust the speed of the magnetic stirrer bar to achieve the most highest homogeneity
Cleaning operating mode
Stop the speed of the magnetic stirrer bar
Switch off the instrument at ambient temperature (approximately 25ºC / 77ºF)
Remove the liquid with a syringe
Remove the basket and the magnetic stirrer bar
Remove excess fluid
Clean the tank with alcohol or water
Once clean, introduce the magnetic stirrer and the basket again
7.2 Starting Screen
We connect the equipment to the power supply and turn on the alternating current switch. We wait
the equipment to be started completely (30s).
Before beginning, any modification not expressed in this manual, Leyro Instruments is not
responsible for the malfunction of the same. The equipment stores all the modified data from
its first start and in case the equipment needs to return to the factory due to malfunction by
these, it will be excluded from guarantee
For any modification expressed in this manual, we must press done to save the changes
When the equipment has been fully started, it will start to control by default with the Internal PT100
and the PT100 Ext key will be deactivated, shown in gray, with which, the internal control will be
activated and the external control will be deactivated.
If it is necessary to control with External PT100, press the PT100 Ext key, which will be activated
and represented by green color, with which the internal control will be deactivated and external
control will be activated.

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The equipment starts on the first page, which represents the PID control by Internal PT 100.
If PID control is required by External PT100, press the arrow on the right, which allows us to go to
the second page.
If you need to visualize both PID controls both Internal and External, press the arrow on the right
again and we will go to the third page.
7.3 Modification of the set point
To modify the set point (SP), we must select the number indicated in the value of the set point and
change it to the necessary one. To return to the main screen press enter, to send the team the new
set point or cancel or return arrow, to discard.
The set point (SP) can only be modified in the PID control of the Internal PT100, regardless if the
equipment is controlled by internal or external probe.

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7.4 Record data / Logging
To record the necessary data, press the Logging key, since by default the device is not in recording
mode, represented in gray. Pressing will activate the recording mode, represented in green
When the mentioned process needs to be stopped, the Logging key will be deactivated, and return
to a gray state.
To save the data can be stored on the computer or in a USB device. By default the equipment will
storage hem in it and can be saved in it or exported to a USB device. At the same time data’s can
be Import from a USB device and store it on the computer.
7.5 Failures
If we press the arrow that appears at the top of the screen, we will access the menu of:
In case the equipment has the option of external probe, an error will appear if it is not connected to
the equipment, it is indicated by a red bar flashing at the top. When the probe is connected, the
error will disappear.