Ametek Jofra MTC-650 A MKII User manual

User Manual
Marine Temperature Calibrator
Jofra MTC-650 A MKII

User Manual
Marine Temperature Calibrator
JOFRA MTC-650 A MKII
Copyright 2019 AMETEK Denmark A/S

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List of contents
1.0 Introduction .......................................................................................................................3
1.1 List of equipment received........................................................................................................3
2.0 Safety instructions............................................................................................................4
3.0 Setting up the calibrator...................................................................................................7
3.1 Before use................................................................................................................................7
3.2 Keypad - Functions................................................................................................................10
3.3 Display...................................................................................................................................10
3.4 Connections...........................................................................................................................11
3.5 Stability of temperature values...............................................................................................11
4.0 Operating the calibrator.................................................................................................. 13
4.1 Operating principle.................................................................................................................13
4.2 System menu.........................................................................................................................13
4.3 Starting the calibrator.............................................................................................................15
4.4 Stability setting.......................................................................................................................15
4.5 Selecting the set-temperature ................................................................................................16
4.5.1 Editing the preset set-temperature..............................................................................17
4.6 Auto Step function..................................................................................................................17
4.6.1 Running an Auto Step test..........................................................................................17
4.6.2 The calibrator's Auto Step procedure..........................................................................18
4.7 Switch Test function...............................................................................................................19
4.7.1 Running a Switch Test................................................................................................19
4.7.2 The calibrator's Switch Test procedure.......................................................................20
5.0 Setting the mains voltage and replacing the main fuses............................................. 22
5.1 Replacing the main fuses.......................................................................................................22
6.0 After use........................................................................................................................... 23
6.1 Storing and transporting the calibrator....................................................................................23
6.2 Switching off the calibrator .....................................................................................................24

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1.0 Introduction
The MTC-calibrator is a fast, timesaving, and reliable true industrial temperature calibrator
designed for on-site use calibrating temperature sensors and temperature switches.
Read this manual carefully before using the instrument and make sure that all safety
instructions and warnings are observed.
1.1 List of equipment received
When you receive the instrument, the following should be enclosed:
•1 MTC Calibrator
•1 USB memory stick containing electronic Reference manual and software package
JOFRACAL
•1 mains cable
•1 sets of test leads and test clips (black and red)
•Thermal protection shield
•1 tool for insertion tube
•1 USB cable
•1 Calibration certificate (International traceable)

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2.0 Safety instructions
Read this manual carefully before using the instrument!
In order to avoid any personal injuries and/or damage to the instrument all safety
instructions and warnings must be observed.
Disposal
– WEEE Directive
These
calibrators contain Electrical and Electronic circuits and must be recycled or
disposed of properly (in accordance with the WEEE Directive 20
12/19/EU).
Warning
About the use:
•The calibrator must not be used for any purposes other than those described in
this manual, as protection provided by the calibrator may be impaired and it might
cause a hazard.
•The calibrator has been designed for indoor use only and is not to be used in
wet locations.
•The calibrator is not to be used in hazardous areas, where vapour or gas
leaks, etc. may constitute a danger of explosion.
•The calibrator is not designed for operation in altitudes above 2000 meters.
• The calibrator is a CLASS I product and must be connected to a mains outlet with
a protective earth connection. Ensure the ground connection of the calibrator is
properly connected to the protective earth before switching on the calibrator.
Always use a mains power cable with a mains plug that connects to the
protective earth.
•To ensure the connection to protective earth any extension cord used must also
have a protective earth conductor.
•Only use a mains power cord with a current rating as specified by the calibrator
and which is approved for the voltage and plug configuration in your area.
•Always make sure to position the power cord and other connected cables in a
secure way to prevent the risk of personnel falling.
•To prevent the calibrator from tipping over and causing damage to equipment or
systems, please avoid pulling the cables connected to the calibrator.
•Before switching on the calibrator make sure that it is set to the voltage of the
mains electricity supply.
•Always position the calibrator to enable easy and quick disconnection of the
power source (mains inlet socket).
•The calibrator must be kept clear within an area of 20 cm on all sides and 1
metre above the calibrator due to fire hazard.
•Never use heat transfer fluids such as silicone, oil, paste, etc. in the dry-block
calibrators. These fluids may penetrate the calibrator and cause electrical hazard,
damage or create poisonous fumes.
•The calibrator must be switched off before any attempt to service the instrument
is made. There are no user serviceable parts inside the calibrator.
•When cleaning the well or the insertion tube, REMEMBER to wear goggles when
using compressed air!

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•Remember to use appropriate protective equipment or get help when carrying the
calibrator (for a longer distance) in order to prevent injuries from dropping the
calibrator.
About the front panel:
•The connectors, on the front panel of the calibrator, must NEVER be connected
to a voltage source.
•Thermostats connected to the switch test input must not be connected to any
other voltage source during a test.
About the insertion tubes and insulation plug:
•Never leave hot insertion tubes which have been removed from the calibrator
unsupervised – they may constitute a fire hazard or personal injury.
If you intend to store the calibrator in the optional aluminium carrying case after
use, you must ensure that the instrument has cooled down to a temperature
below 50°C/122°F before placing it in the carrying case.
•Never place a hot insertion tube in the optional carrying case.
About the fuses:
•The fuse box must not be removed from the power control switch until the mains
cable has been disconnected.
•The two main fuses must have the specified current and voltage rating and be of
the specified type. The use of makeshift fuses and the short-circuiting of fuse
holders are prohibited and may cause a hazard.
Caution – Hot surface
This symbol is visible on the grid plate.
•
Do not touch the grid plate, the well or the insertion tube as the calibrator is
heating up – they may be very hot and cause burns.
•
Do not touch the tip of the sensor when it is removed from the insertion
tube/well – it may be very hot and cause burns.
•
Do not touch the handle of the calibrator during use – it may be very hot and
cause burns.
•
Over 50°C/122°F
If the calibrator has been heated up to temperatures above 50°C/122°F, you must
wait until the instrument reaches a temperature below 50°C/122°F before you
switch it off.
•
Do not remove the insert from the calibrator before the insert has cooled down to
less than 50°C/122°F.
Caution…
About the use:
•Do not use the instrument if the fan is out of order.
•Before cleaning the calibrator, you must switch it off, allow it to cool down and
remove all cables.

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About the well, insertion tube and grid plate:
•The well and the insertion tube must be clean and dry before use.
•Do not pour any form of liquids into the well. It might damage the well or cause a
hazard.
•Scratches and other damage to the insertion tubes should be avoided by storing
the insertion tubes carefully when not in use.
•The insertion tube must never be forced into the well. The well could be damaged
as a result, and the insertion tube may get stuck.
•Before using new insertion tubes for the calibration, the insertion tubes must be
heated up to maximum temperature 650°C (1202°F) for a period of minimum 30
minutes.
•The insertion tube must always be removed from the calibrator after use.
The humidity in the air may cause corrosion oxidation on the insertion tube inside
the instrument. There is a risk that the insertion tube may get stuck if this is
allowed to happen.
•If the calibrator is to be transported, the insertion tube must be removed from the
well to avoid damage to the instrument.
Note…
The product liability only applies if the instrument is subject to a manufacturing
defect. This liability becomes void if the user fails to follow the instructions set out
in this manual or uses unauthorised spare parts.

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3.0 Setting up the calibrator
ENVIRONMENTAL SPECIFICATIONS
Ambient operating temperature range: 0-50°C / 32-122°F
Storage temperature range: -20-50°C / -4-122°F
Humidity range: 5-90% RH, non-condensing
IP protection class: IP10
Altitude: 0-2000 m
Electromagnetic Compatibility: Tested for use in domestic establishment and in
establishments directly connected to low voltage
power supply network which supplies buildings
used for domestic purposes as well as in an
industrial electromagnetic environment as
described in EN61326-1:2013.
POWER SUPPLY SPECIFICATIONS
Line voltage/frequency: 90-127VAC / 180-254VAC 47-63 Hz
IEC protection class: Class I
Power consumption: 1150 VA max.
3.1 Before use
Warning
•The calibrator has been designed for indoor use only and is not to be used in
wet locations.
•The calibrator is not to be used in hazardous areas, where vapour or gas
leaks, etc. may constitute a danger of explosion.
•The calibrator is not designed for operation in altitudes above 2000 meters.
•The calibrator is a CLASS I product and must be connected to a mains outlet
with a protective earth connection. Ensure the ground connection of the calibrator
is properly connected to the protective earth before switching on the calibrator.
Always use a mains power cable with a mains plug that connects to the
protective earth.
•To ensure the connection to protective earth any extension cord used must also
have a protective earth conductor.
•Only use a mains power cord with a current rating as specified by the calibrator
and which is approved for the voltage and plug configuration in your area.
•Always make sure to position the power cord and other connected cables in a
secure way to prevent the risk of personnel falling.
•To prevent the calibrator from tipping over and causing damage to equipment or
systems, please avoid pulling the cables connected to the calibrator.
•Before switching on the calibrator make sure that it is set to the voltage of the
mains electricity supply.

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• Always position the calibrator to enable easy and quick disconnection of the power
source (mains inlet socket).
• The calibrator must be kept clear within an area of 20 cm on all sides and 1 metre
above the calibrator due to fire hazard.
Caution – Hot surface
This symbol is visible on the grid plate.
•Do not touch the grid plate, the well or the insertion tube as the calibrator is
heating up – they may be very hot and cause burns.
• Do not touch the handle of the calibrator during use – it may be very hot and
cause burns
.
When setting up the calibrator, you must… (cf. the figure this page):
1. Place the calibrator on an even horizontal surface where you intend to use it and away
from all draughts. The calibrator must be kept clear within an area of 20 cm on all sides
and 1 metre above the calibrator due to fire hazard.
Caution…
Do not use the instrument if the internal fan is out of order .
2. Ensure a free supply of air to the internal fan located at the bottom of the instrument (pos.
1). The area around the calibrator should be free of draught, dirt, flammable substances
etc.
3. Check that the fuse size corresponds to the applied voltage on (pos. 2). The fuse is
contained in the power control switch (on/off switch (230V/115V)).

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Warning
The two main fuses must have the specified current and voltage rating and be of the
specified type. The use of makeshift fuses and the short-circuiting of fuse holders are
prohibited and may cause a hazard.
4. Check that the earth connection for the instrument is present and attach the cable.
5. Place the sensor (pos. 3) in the insertion tube (pos. 4) as shown in the figure.
Caution…
Before using new insertion tubes for the calibration in the MTC-650 instrument the
insertion tubes must be heated up to maximum temperature 650°C (1202°F) for a
period of minimum 30 minutes.
6. In order to protect the sensor and its connections use the thermal protection shield
(129264 – pos. 5) at high temperatures.

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3.2 Keypad - Functions
3.3 Display
1
Function keys - F1, F2, F3, F4
For operating the horizontal menu.
Back key
Cancel a selection or return to previous menu.
System menu key
Enter the System menu.
Arrow Keys
Navigation mode: Use the four keys to move the cursor in
the desired direction.
Edit mode: The Up and Down Arrow keys scroll through
the lists of options. If entering a number, the Left and Right
Arrow keys move the cursor one character in the desired
direction.
Action key / Enter key
Action function: Open and close edit fields or a menu
button. The action key also accepts the selected option or
entered value.
Enter function: Accept selected options or entered values.
When a value is entered with the Enter Key the cursor
selects the next configurable field in the list.
5
4
3
2
6
7
8
9
10
1) Horizontal menu bar
Provides you with the relevant menu options that can be selected at the present point. Each option
can be selected and activated by pressing the function keys (F1, F2, F3 and F4).
2) Process Indicator
Indicates the status of the current process.
3) “Time to stable” Selection
Shows the selected specified stability criteria and states a time when the stable situation can be
achieved.

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3.4 Connections
3.5 Stability of temperature values
The stability of the TRUE temperature is indicated by the following messages:
•"Not stable": Indicates that the measured temperature is not yet within the specified
stability criteria.
•Indicates "Time to stable": The temperature changes are within the specified stability
criteria and states a time (in minutes and seconds) when the stable situation can be
achieved.
4) Reference sensor info
Shows the reference sensor selected.
5) Memory reading
Shows the current memory selected from the System menu.
6) Warning/Error symbols.
If a warning or an error symbol occurs during operation, action needs to be taken.
7) Real Time Clock and date display.
8) True temperature reading
Shows the numeric value of the temperature being measured.
9) Units
Shows the unit of the current measurement.
10) Set temperature reading
Shows the numeric value of the current set temperature selected.
Device
USB 2.0 Device Port, 1 x USB.
Power Control Switch
With a cable connection and On/Off switch. It also contains the
main fuse. See section 3.1 in the reference manual for
information on how to change the fuse. The text above the
Power Control Switch indicates the fuse value.
Switch Test
Connection for thermostat switch test. Note that this connection
is for voltage free switches.

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•Indicates that the “stable” situation is achieved and for how long the calibrator has been
stable. When the calibrator has been stable for more than 99 minutes, only the stable
sign is displayed (time is no longer displayed).
When the instrument is heating up and cooling down indication of this will be shown as following
symbols:
•The instrument is heating up.
•The instrument is cooling down.
Hot and cold symbols will be displayed in the upper black info bar when:
•the well temperature is below 5°C.
•the well temperature is above 45°C.

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4.0 Operating the calibrator
4.1 Operating principle
The calibrator is operated using the Functions keys, the Arrow keys and the
Action/Enter key.
1. Press the Functions keys to operate the horizontal menu bar.
2. Press any of the (Arrow) keys to enter Navigation Mode. Editable fields will be
highlighted in blue.
3. Use the Arrow) keys to move between the configurable fields within the display.
Selected fields will be highlighted in dark blue..
4. Press the (Enter) key to access the selected field for editing.
5. Use the (Up) and (Down) Arrow keys to select a new value.
6. Press the (Enter) key to accept the new value
7. To exit the Navigation Mode press the (Back) key. The (Back) key is also used
to cancel a selection or to return to a previous menu.
4.2 System menu
The System menu can be accessed at any stage of operation:
1. Press the (System) key to display the System menu.
2. Use the (Up) and (Down) Arrow keys to scroll in the list.
•System Settings menu
1. Use the (Enter) key and the (Up) and (Down) Arrow keys to access editable
fields, select new values and accept new values.

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Note…
•If the current set-temperature is higher than the new max-temperature, you will
need to adjust the set-temperature. The instrument will immediately begin to cool
(if required) as soon as the new max-temperature is accepted.
•The calibration interval can be set between 1 and 99 months. When the
calibration interval is exceeded, a yellow warning symbol will appear in the
upper part of the display.
•If Silent mode is selected, the cooling speed will be reduced.
•Presets menu
1. The preset temperatures can be changed manually using the (Arrows) keys.
Note…
Temperature range is limited by Min. SET Temp. and Max. SET Temp. settings
editable in the System
Settings menu
.
•System Info menu
1. In the System Info menu important information such as serial numbers and
calibration dates of the instrument are given.
It is not possible to edit any fields in this menu.
•Store menu (Save Settings)
After you have configured the instrument, you can save the setup for future use using
the Store function.

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1. Use the (Up) and (Down) Arrow keys to select the Memory-setup you want to
modify, and press (Save). The new configuration is now saved.
2. You can change the name of the highlighted saved setup by pressing (Enter), and
then using the (Up) and (Down) Arrow keys to change the characters.
The name is limited to seven (7) characters.
3. Press to save the new name.
•Recall menu
To recall your memory setups select the Recall function.
1. Use the (Up) and (Down) Arrow keys to to scroll in the setup-list.
2. Select the requested setup, and press (Enter).
The name of the setup will appear in the upper-left corner of the display.
If selecting the Factory default function the active setup will be reset and change to
the initial setting.
4.3 Starting the calibrator
Switch on the calibrator using the power control switch.
A start up screen is displayed and then replaced with the main menu screen:
The functions in the horizontal menu bar are available using the Functions soft keys F1–
F4. For Operating principle – See section 4.1.
4.4 Stability setting
When internal reference is selected the calibrator uses a set of minimum internal
stability criteria that shall be met before stability is indicated.
The stability time can be adjusted from the minimum internal stability time (typical 5 min)
up to 99 min.
F3
F3

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4.5 Selecting the set-temperature
Note…
Temperature range is limited by Min. SET Temp. and Max. SET Temp. settings
editable in the System Settings menu.
The set-temperature can be entered both manually and by selecting a preset
temperature.
1. For manually use press (Set)
2. Use the (Arrow) keys to enter the temperature requested.
3. Press (Enter) to accept the entered temperature.
1. For selecting the preset temperature press (Preset).
2. Select one of the 4 temperature options available from the menu bar by pressing the
correspondent Function key (F1 – F4).
3. The set-temperature is selected, once the Function key has been pressed.
The calibrator will now heat up / cool down.
The starting point is the last chosen set-temperature (even if the instrument has
been switched off).
The top display continuously shows the read-temperature and the lower display
shows the set-temperature.
In the top display the calibrator will indicate the estimated time in whole minutes
until the calibrator will be stable.
When the calibrator is stable the display will show a green checkmark
symbol and the instrument will emit an audible alarm. The instrument will indicate in
minutes and seconds for how long the instrument has been stable.
F1
F2

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4.5.1 Editing the preset set-temperature
It is possible to change the preset set temperature to whatever value desired.
1. Press (Preset).
2. Press one of the (Arrow) keys and an editable field displaying the preset set
temperatures appears.
3. Navigate to the set temperature field using the arrows.
4. Press (Enter) to access the editable field and use the arrows (Up) and
(Down) to select a new set value.
5. Press (Enter) to accept the new set value.
6. Press (Back) to return to the previous menu.
4.6 Auto Step function
Auto Step is used to step automatically between a range of different calibration
temperatures. This is useful when calibrating sensors in places which are hard to reach,
and when calibrating sensors for which the output is displayed in a different location.
Note…
Temperature range is limited by Min. SET Temp. and Max. SET Temp. settings
editable in the System Settings menu.
4.6.1 Running an Auto Step test
1. Press (Auto Step) to access the Auto Step setup. If you wish to return to the
Main screen press (Main).
2. Press one of the (Arrow) keys to access the editable fields for new values:
•No of steps: the number of temperature steps per direction (T
1
T
x
) can be set
using integers from 2 to 12. You must select minimum 2
steps, maximum 12 steps.
•Hold time: defines the time (in minutes) the temperature is maintained
(after it is stable) for each step.
F2
F1
F3

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• Step values: must be set within the sensors permitted range.
3. Press (F4) to start the Auto Step test.
The Auto Step test is now in progress.
While the Auto Step test is in progress, 4 options are available:
•Stop : Press (F1) to stop the Auto Step test. The process will
end.
Pressing the (F4) key the process will start again running
step 1.
•Previous : Press (F2) to force the test to jump a step backwards to the
previous running step regardless of the step’s stability.
•Next : Press (F3) to force the test to jump a step forwards to the
next running step regardless of the step’s stability.
•Pause : Press (F4) to pause the test. Pressing start (F4)
again, the process will continue running from the current step.
4.6.2 The calibrator's Auto Step procedure
1) Once the Auto Step test is started, the calibrator starts working towards the given set-
temperature. An audible alarm will be emitted once the calibrator is stable.
2) The calibrator will wait the specified amount of hold time. The instrument indicates
this by counting down the amount of time remaining.
3) The calibrator will then go to the next step. The procedure is the same as for the first
step. This process will be repeated until the last step has been executed and the
function has been completed.
4) The measured TRUE temperatures for each step are displayed during operation.

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4.7 Switch Test function
Switch Test automatically locates the switch temperature of a thermostat.
Three parameters are required:
•Start temperature (T
1
)
•End temperature (T
2
)
•Rate of change in temperature pr. minute (Rate).
Dead band of a thermostat can also be determined here. Where the dead band
determines the tolerance between the upper switch temperature and the lower switch
temperature of the thermostat.
4.7.1 Running a Switch Test
Warning
Thermostats connected to the switch test input must not be connected to any other
source during test.
Note…
Before running the Switch Test, make sure that the switch is connected to the Switch
Test input.
Note…
Temperature range is limited by Min. SET Temp. and Max. SET Temp. settings
editable in the System Settings menu.
1. Press (Switch) to access the Switch Test setup. If you wish to return to the
Main screen press (Main).
The small graph illustrates the current T
1
, T
2
and dead band selections. Note that T
1
can be greater than T
2
.
2. Press one of the (Arrow) keys to access the editable fields for new values:
•T
1 :
First set temperature
•T
2
: Second set temperature
F4
F1