MRC MHK 1-6D User manual

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Digital Ceramic Hotplate
With Stirrer
MHK 1-6D
Operation Manual

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Important Before using this product, read this
entire operation manual carefully. Users should
follow all of the operational guidelines contained in
this manual and take all necessary safety
precautions while using this product. Failure to
follow these guidelines could result in potentially
irreparable bodily harm and/or property damage.
Caution All internal adjustments and maintenance must be
performed by qualified service personnel.
Material in this manual is for information purposes only. MRC is
committed to a continuing program of product development and
improvement, and reserves the right to change information, such as
specifications, appearance, and dimensions, described in this
document without notice. MRC makes no representations or
warranties with respect to this manual. In no event shall MRC be held
liable for any damages, direct or incidental, arising out of or related
to the use of this manual.
This manual contains important safety and operation information.
You must carefully read, understand, and follow all the instructions in
this manual prior to operating this instrument. Keep this manual in a
safe place nearby for reference and make it easily available to all
users.
1) This manual highlight DANGER/WARNING/CAUTION/NOTICE
alerts to prevent injury or property damage and also to achieve
optimum performance of your instrument.
2) These alerts are classified into four types in this manual
depending on the importance and the risk levels as described
below
3) The claim which is out of the quality guarantee published by
the Manufacturer is out of Manufacturer’s responsibility.
4) The damage which is from unexpected fault or damage of user
by Acts of God is out of Manufacturer’s responsibility.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Table of content
Section 1 Warning and Cautions………….…..……………………………1-1
Section 2 General Description ………….………………..…………………2-1
Features
Safety
Convenience
Construction
Section 3 Unpacking and installation…………………….……….………3-1
Installation environment
Connecting to Power Supply
Location Condition
Connecting to the main power
Section 4 Operation……………………………………….…………………….4-1
Power On
Change the Set Value (SV)
Stir Control Knob
Section 5 Maintenance………………………..…………….……….….………5-1
Cleaning Product
Relocation
Keeping Product
Section 6 Troubleshooting …………….……………………………….….…6-1
Section 7Warranty Information………….…………………………..….….7-1

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 1 Warnings and Cautions
DANGER
Ignoring the following warnings could cause serious injuries or
even fatal accidents.
•Understand all alert labels prior to operating this equipment.
•Never remove or damage the alert labels.
•Never move this equipment while under operation.
•Never install or use this equipment in explosive or flammable
atmospheres.
•Never use or store flammable or hazardous substances near to
this equipment.
•Never use the equipment to heat flammable or hazardous
substances.
•Always wear proper protective gear (such as goggles, gloves,
masks or an apron) when using this equipment.
•Never allow water, organic solvents, dust, or corrosive gases to
get inside the equipment.
•Never immerse this equipment in water or operate it under
water.
•Never reach for this equipment if it has fallen into water.
•Check electrical requirements described in this operation
manual or on the ID plate of this equipment before use.
Connect this equipment to a dedicated power outlet nearby.
•Connect this equipment only to properly grounded power
outlets to protect you and your instrument. Do not ground to
gas pipes or water pipes.
•Never install this equipment closer than 30 cm (12 inches) to a
wall of combustible material. Observe minimum distances (in
general, 30 cm) from other devices.
•If you observe strange smoke, odor or noise from the
instrument, unplug the power cord immediately and turn off
the main power switch. After the smoke or odor disappears,
contact your dealer or MRC if any repair is required.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
•Never disassemble, repair, or modify this equipment on your
own. Doing so will void your warranty and may result in injuries
or product damages.
•Do not heat any substances above temperature which will
cause hazards of explosion, implosion or release of toxic or
flammable gases from the material being heated.
•Do not use in the presence of pressurized or sealed containers.
Fire or explosion may result causing injury or death
•The plate was calibrated as "internal mode". It is strictly
prohibited to connect an external sensor without
additional calibration. Connecting an external sensor
without additional calibration will cause serious damage to
the plate due to overheating.
•Do not operate the plate with external temperature probe
in the air or out of the liquid or without additional
calibration.
•The external probe must be properly placed into a liquid
on the top surface during the whole process, to prevent
damage to the ceramic plate
•DO NOT cover ceramic plate with metal foil.
•DO NOT use metal pots, sand bath or other insulating
material.
•To avoid electric shock, always use a property grounded
electrical outlet of correct voltage, and correct handling
capacity equipment

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
CAUTION
Ignoring the following cautions could cause injuries or property
damages.
•Keep away the power cord from the hot plate, to prevent
melting and damages.
•Do not touch the top plate or any object near it even when the
heater is turned off. You may get burned due to residual heat.
•After using this equipment, make sure to turn off the main
power switch and also to disconnect the power cord from the
power outlet for the safety of other users.
•Do not place heavy objects, including this equipment, on top
of the power cord and do not strip, scratch, bend, twist, pull, or
heat the power cord. A damaged power cord is a fire and
electrical shock hazard.
•Make sure to set up this equipment on a flat, stable, clean,
non-slip, dry, and fireproof surface inside a lab with proper
safety measures.
•Do not touch the power outlet, power socket, or power cord
with wet hands. And make sure to connect the power cord
directly and firmly to the power outlet and power socket.
•Do not put or insert any objects (especially if conductive or
flammable) inside this equipment.
•Do not expose this equipment to any heat sources including
direct sunlight.
•Mechanical shock or vibration can damage this equipment. Pay
extra attention while moving it. Damages caused by
mechanical shock or vibration may result in injury or fire.
•Do not impact the top plate or heat sink. You can damage the
equipment or get injured.
•Do not install this equipment near any device that generates
high frequency noise such as high frequency welding
machines, high frequency sewing machines, or SCR power
controllers.
•Before cleaning, make sure to unplug the power cord to avoid
electric shock or fire.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
•Do not use chlorine bleach, ammonia-based cleaners,
abrasives, ammonia, or metal scouring pads. Wipe with a soft
damped cloth or a sponge soaked in water or diluted neutral
detergent.
•The user shall be aware that, if the equipment is used in a
manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
•The instrument should be placed so, that handy operation of
the ON-OFF Switch is possible.
•Service only by a qualified Service engineer.
•Always disconnect from power supply prior to maintenance
and servicing.
•Connect the instrument to a ground mains outlet, after
ensuring that the Voltage is the same as given on the name
plate
•The Instrument must be connected to an earthen (grounded)
supply

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 2 General Description
Congratulations of your purchase of MRC hotplate which is specially
designed to provide maximum benefit for your investment with
respect to performance, safety, ease of use, and durability.
Item/Model
MHK 1-6D
Dimension (W x D x H, mm) 910 X 200 X 180
Top plate dimension (mm) 115 X 115 mm
Maximum heating capacity 2400W (6 X 400W)
Current consumption 10A
Temp. range Up to 500°C
Temp. control Digital
Magnetic stirrer 100 – 1400 rpm
Features Performance
•Microprocessor PID Feedback Control
Fast and precise temperature control is provided by the
microprocessor PID controller
•Auto-tuning (AT)
Automatic tuning of the PID parameters provides more
accurate temperature control.
•Temperature Offsetting
In case your own thermometer is to be used for temperature
control for specific applications, there can be some differences
between the temperature of your thermometer and the
displayed temperature of this unit.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Convenience
•Two digital displays on the control panel clearly show both set
and actual temperatures of the top plate side by side.
•You can easily set your own temperature limit at any value
between 0 and 500°C.
•One support rod (optional) can be attached to hold various
kinds of devices such as temperature sensors, thermometers,
and so on.
•The ceramic top plate is highly resistant to heat and corrosion.
In addition, its white color is optimal for monitoring color
changes of the media during operation.
Construction
(1) Ceramic Top Plate
(2) Heating Indicator
(3) Stirring Control Knob
(4) C22 Temperature Controller
(5) Specific heating switch for each plate

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
(6) Socket for Temperature Probe (K)
(7) Threaded Holes for Support Rod (Optional)
(8) Main Power Switch
(9) Power Cord
(10)Fuse (230V/15A)
(11) Identification Label

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 3 Unpacking and Installation
Upon receiving the instrument, check to ensure that no damage has
occurred during shipment. It is important that any damage that
occurred during shipment must be detected before unpacking. If
such damage is found, notify the carrier immediately.
After unpacking, check to ensure that all the following parts and
accessories are included in the package. If not, contact your dealer or
MRC immediately.
Item
Quantity
Main Body
1
Operation Manual
1
External Probe (option)
1
Stirring magnet (option)
1
Support Rod (option)
1
RS232 or RS485 Communication (option)
1
Programmer (option)
1
Separate Control box (option)
1
Installation Environment
It should be installed in suitable environment as described below.
Avoid direct sunlight.
Room temperature should be 5°C ~ 40°C
Relative Humidity (RH%) should be less 80%.
Altitude should be less than 2,000m.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Connecting to Power Supply
When connecting power, use only the power cord that came with
your instrument. The power connection procedures are as follows:
(1) Before connecting the power cord, make sure that the main
power switch is turned off.
(2) Plug the other end into a properly grounded and dedicated
power outlet nearby.
Location Conditions
DANGER
•Never install or use this equipment in explosive atmospheres.
•Never install or use this equipment with or near to hazardous
or flammable substances.
•Never expose this equipment to any heat sources including
direct sunlight.
•Never install this equipment closer than 20 cm (8 inches) to a
wall of combustible material.
•Never install this equipment near any device that generates
high frequency noises.
•Set up this equipment on a flat, stable, clean, non-slip, dry, and
fireproof surface inside a lab with proper safety measures.
•Observe the minimum distances (in general, 30 cm or 12
inches) from other devices. In addition, any device which can
be affected by the motor vibrations should not be placed near
this equipment.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Connecting to Main Power
DANGER
•Check electrical requirements in the operation manual or on
the ID plate attached to the back of this equipment before use.
•Make sure to connect this equipment only to properly
grounded as well as dedicated power outlets to protect you
and your equipment.
•In order to prevent fire or power cord damage due to
overloading, do not use power strips or improper extension
cords.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 4 Operation
C22 Digital controller
Operations
Power On
•Turn the main power switch on (at the back)
•Turn the specific heating switch on (at the front)
Change the Set Value (SV)
•Press UP or DOWN keys to change the set value
NOTICE
•You can change the temperature setting even during
operation.
•Changing the temperature setting is allowed only within the
low and high temperature limits.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Stir Control Knob
Turn it clockwise to set desired stirring speed.
Turn it all the way counterclockwise to turn off stirring function.
Stirring Instructions
1. Fill vessel with liquid to be stirred.
2. Place stir bar into vessel.
3. Place vessel in the center of the top surface.
4. Turn Stir Control Knob
5. Stir bar to cease rotation before removing the vessel from the
unit.
NOTICE
Please note that the viscosity of the stirred material will affect the
ability of the stir bar to remain coupled to the rotating ring magnet.
Materials of high viscosity must be stirred at slower speed
settings.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 5 Maintenance
Item
Inspection
Interval
Daily Weekly
Connection status of power cord or plug •
Damages in power cord or plug
•
Cleanliness of top plate
•
Cleanliness of main body and accessories
•
Damages in plate, switches, buttons, Controller
•
Heating capability check (up to 500℃)
•
Stirring capability check (up to 1200 rpm)
•
Assembly status of all parts or accessories
•
Cleaning Product
WARNING
•Never immerse this unit in water or any other liquid.
•Do not allow any liquid or wet material to get inside the unit
when cleaning.
•Do not reconnect this unit to power outlets until all cleaned
surfaces have dried.
CAUTION
•Do not use chlorine bleach, ammonia-based cleaners,
abrasives, ammonia, or metal scouring pads when cleaning.
•During cleaning and general operation take care not to scratch
the surface of the ceramic-coated top plate as this could result
in subsequent thermal breakage.
•The ceramic top may break during use if not properly
maintained.
•Keep the ceramic top clean. A nonabrasive cleaner may be
used to clean the ceramic top
•Inspect the ceramic top for damage during cleaning.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
•Discontinue product use if the ceramic top is chipped, etched,
or shows excessive scratching.
Cleaning Product (continued)
Always make sure to keep top plate, main body, and accessories
clean. Dirt and other foreign substances can cause fire or electric
shock. Before attempting cleaning,
(1) Disconnect the power cord from the power outlet and ensure
that the equipment is cool enough,
(2) Wipe with a soft dry cloth first to remove any foreign matter
and, if not enough,
(3) Wipe with a soft damp cloth or a sponge soaked in water or
diluted neutral detergent when necessary.
Relocation
If you need to move the equipment to another place,
(1) Disconnect the power cord from the power outlet,
(2) Pack the equipment and its accessories into the original
packaging or any other suitable container before moving.
CAUTION
•Pay attention to avoid mechanical shock or vibration while
moving the instrument. Damages caused by mechanical shock
or vibration may result in injury or fire.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Keeping Product
If you know you will not use this equipment for an extended period
of time,
(1) Disconnect the power cord from the power outlet and clean
the equipment with soft cloth.
(2) Pack the equipment properly and make sure to store it in dry
place.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 6 Troubleshooting
Power
troubles
Cause Corrective action
No Power
Unsuitable power supply
Meet the electrical requirements of this
equipment before use.
Loose power connection
Reconnect the power cord firmly to the
power outlet as well as to the power
socket at the back of the instrument.
Damages in power cords,
Power outlets, plug, controller
Replace the damaged part with a
proper one.
Internal circuit failure Contact MRC for service
Repetitive tripping of
circuit breaker
Electrical overload
Disconnect all the appliances connected
to the breaker first and reconnect them
one by one to find the reason for the
overload.
Damages in heating element Contact MRC for service.
Internal circuit failure Contact MRC for service.
No operation with
power on
Main switch failure
Contact MRC for service.
Controller failure
Contact MRC for service.
Internal circuit failure Contact MRC for service.
Operation
troubles Cause Corrective action
No heat
Temperature sensor is
disconnected
Connect the temperature sensor
Too low setting of the
temperature controller
Increase the temperature setpoint
Heating element failure Contact MRC for service.
Internal circuit failure Contact MRC for service.
No or too slow
temperature
change during heating to
increase the heating rate
Too low setting of the
heating rate
Increase the temperature setpoint
Too much media Reduce the media volume.
Internal circuit failure Contact MRC for service.
Switches malfunction
Internal circuit failure Contact MRC for service
Damaged switches Contact MRC for service.
Stirring knob malfunction Damaged knob Contact MRC for service.
Controller display
malfunction
Damage due to chemical spill
or overheating or technical
problem
Contact MRC for service.

3, Hagavish st. Israel 58817 Tel: [phone], Fax: [phone]
[e-mail]
Section 7 Warranty Information
•The warranty provided for one year and begins from the date
of the purchase by the user
•The warranty protection extends to any subsequent owner
during the first-year warranty period.
•This warranty does not apply if the product has been damaged
by accident, abuse, misuse, or misapplication, or from ordinary
wear and tear.
•The Technical Services Department must be contacted for
warranty determination and direction prior to performance of
any repairs.
•Expendable items, glass, filters and gaskets are excluded from
this warranty. Replacement or repair of components parts or
equipment under this warranty shall not extend the warranty to
either the equipment or to the component part beyond the
original warranty period.
•The Technical Services Department must give prior approval
for return of any components or equipment.
•Your MRC Sales Office is ready to help with comprehensive site
preparation information before your equipment arrives. Printed
instruction manuals carefully detail equipment installation,
operation and preventive maintenance.
•If equipment service is required, please call our Technical
Services Department at [phone] (office) or +972(0)3-
6227732/1 (Service Laboratory)
•We're ready to answer your questions on equipment warranty,
operation, maintenance, service and special application.
•Outside the Israel , contact your local distributor for warranty
information.