Reference manual
Temperature Calibrator
JOFRA MTC-140/320/650 A
Reference Manual
Temperature Calibrator
MTC-140/320/650 A
Copyright 2001 AMETEK Denmark A/S
About this manual….
The structure of the manual
This reference manual is aimed at users who are familiar with
AMETEK calibrators, as well as those who are not. The manual
is divided into 11 chapters which describe how to set up,
operate, service and maintain the calibrator. The technical
specifications are described and accessories may be ordered
from the list of accessories.
Safety symbols
This manual contains a number of safety symbols designed to
draw your attention to instructions which must be followed when
using the instrument, as well as any risks involved.
Warning
Conditions and actions, which may compromise
the safe use of the instrument and result in
considerable personal injury or material damage.
Caution…
Conditions and actions, which may compromise
the safe use of the instrument and result in slight
personal or material damage.
Note…
Special situations which demand the user’s
attention.
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List of contents
1.0 Introduction .............................................................................. 4
1.1 Warranty ....................................................................................... 5
2.0 Safety instructions ................................................................... 6
3.0 Setting up the calibrator ........................................................ 11
3.1 Receipt of the calibrator .............................................................. 11
3.2 Preparing the calibrator .............................................................. 13
3.3 Choice of insertion tube .............................................................. 15
3.4 Inserting the sensor .................................................................... 17
4.0 Operating the calibrator ......................................................... 20
4.1 Keyboard, display and connections ............................................ 20
4.2 Starting the calibrator .................................................................. 23
4.3 Selecting the set-temperature .................................................... 23
4.4 Using the SWITCH TEST ........................................................... 25
4.5 Using the AUTO STEP ............................................................... 29
4.6 Using the MENU ......................................................................... 32
4.6.1 Adjusting the temperature unit ....................................... 33
4.6.2 Adjusting the max-temperature ...................................... 34
4.6.3 Adjusting the SWITCH TEST slope rate ........................ 34
4.6.4 Adjusting the extra stability time .................................... 35
4.6.5 Adjusting the temperature resolution ............................. 35
4.7 Simulation/training ...................................................................... 36
5.0 Storing and transporting the calibrator ............................... 37
6.0 Errors ....................................................................................... 40
7.0 Setting the mains voltage and replacing the fuses ............ 42
7.1 Returning the calibrator for service ............................................. 43
8.0 Maintenance ............................................................................ 45
8.1 Cleaning ...................................................................................... 45
8.2 Adjusting and calibrating the instrument ..................................... 47
8.2.1 Adjusting the calibration date ......................................... 49
8.2.2 Calibrating/adjusting the instrument .............................. 50
9.0 Technical specifications ........................................................ 54
10.0 List of accessories ................................................................. 61
11.0 Standard insertion tubes ....................................................... 63
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1.0 Introduction
Congratulations on your new AMETEK JF
Instruments MTC-Calibrator!
With the AMETEK JF Instruments calibrator, you have chosen an
extremely effective instrument which we hope will live up to all your
expectations. Over the past many years, we have acquired extensive
knowledge of industrial temperature calibration. This expertise is
reflected in our products which are all designed for daily use in an
industrial environment. Please note that we would be very interested in
hearing from you if you have any ideas or suggestions for changes to
our products.
This reference manual applies to the following instruments:
MTC-140 A
MTC-320 A
MTC-650 A
(with RS232)
(with RS232)
(with RS232)
ISO-9001 certified
AMETEK Denmark A/S was ISO-9001 certified in September 1994
by Bureau Veritas Certification Denmark.
CE-label
Technical assistance
Please contact the dealer from whom you acquired the instrument if
you require technical assistance.
Your new calibrator bears the CE label and conforms to
the EMC directive and the Low-voltage Directive.
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1.1 Warranty
This instrument is warranted against defects in workmanship, material
and design for two (2) years from date of delivery to the extent that
AMETEK will, at its sole option, repair or replace the instrument or any
part thereof which is defective, provided, however, that this warranty
shall not apply to instruments subjected to tampering or, abuse, or
exposed to highly corrosive conditions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES
WHETHER EXPRESS OR IMPLIED AND AMETEK HEREBY
DISCLAIMS ALL OTHER WARRANTIES, INCLUDING, WITHOUT
LIMITATION, ANY WARRANTY OF FITNESS FOR A PARTICULAR
PURPOSE OR MERCHANTABILITY. AMETEK SHALL NOT BE
LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES,
INCLUDING, BUT NOT LIMITED TO, ANY ANTICIPATED OR LOST
PROFITS.
This warranty is voidable if the purchaser fails to follow any and all
instructions, warnings or cautions in the instrument’s Reference
Manual.
If a manufacturing defect is found, AMETEK will replace or repair the
instrument or replace any defective part thereof without charge;
however, AMETEK’s obligation hereunder does not include the cost of
transportation, which must be borne by the customer. AMETEK
assumes no responsibility for damage in transit, and any claims for
such damage should be presented to the carrier by the purchaser.
105337 04 2015-05-07 5
2.0 Safety instructions
Read this manual carefully before using
the instrument!
Please follow the instructions and procedures described
in this manual. They are designed to allow you to get
the most out of your calibrator and avoid any personal
injuries and/or damage to the instrument.
Disposal – WEEE Directive
These calibrators contain Electrical and Electronic circuits
and must be recycled or disposed of properly (in
accordance with the WEEE Directive 2002/96/EC).
Warning
About the use:
The calibrator must not be used for any purposes
other than those described in this manual, as 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.
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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.
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!
About the frontpanel:
The connectors, on the front panel of the calibrator,
must NEVER be connected to a voltage source.
Thermostats must not be connected to any other
voltage source during a test.
About insertion tubes and insulation plugs:
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 aluminium
carrying case after use, you must ensure that the
instrument has cooled to a temperature below
105337 04 2015-05-07 7
100°C/212°F before placing it in the carrying case.
Never place a hot insertion tube in the optional
carrying case.
Use only insulation plugs supplied by AMETEK
Denmark A/S.
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 engraved in 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
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Caution – Cold surface
Below 0°C/32°F (applies only to the MTC-140 A
model)
If the calibrator has reached a temperature below
0°C/32°F, ice crystals may form on the insertion tube
and the well. This, in turn, may cause verdigris to
form on the material.
To prevent this from happening, simply heat up the
calibrator to 100°C/212°F and any water left will
evaporate.
Remove the insulation plug while heating up.
It is very important that humidity in the well and
insertion tube is removed to prevent corrosion and
frost expansion damages.
Do not touch the well or insertion tube when these
are below 0°C/32°F - they might create frostbite.
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.
About the well, insertion tube and grid plate:
The well and the insertion tube must be clean before
use.
Do not pour any form of liquids into the well. It might
damage the well.
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
105337 04 2015-05-07 9
temperature - 320°C (608°F) / 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 maintenance
instructions set out in this manual or uses unauthorised
spare parts.
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3.0 Setting up the calibrator
3.1 Receipt of the calibrator
The calibrator is supplied in an aluminium carrying case.
When you receive the instrument…
Carefully unpack and check the calibrator and the accessories.
Check the parts off against the list shown below.
If any of the parts are missing or damaged, please contact the
dealer who sold the calibrator.
You should receive:
1 calibrator
S
T
N
E
M
U
R
T
S
N
I
N
O
I
T
A
R
B
I
L
A
C
1 mains cable
1 set of test cables (1 black, 1 red)
3 pcs. insulation plugs for 6, 10, 13 mm sensors
(MTC-140 A only)
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1 insertion tube (user specified)
1 tool for insertion tube
1 traceable certificate
Calibration Certificate
Calibration Equipment
xxxxxxxxxxxx
Calibration Traceability
xxxxxxxxxxxx
xxxxxxxxxxxx
Calibration Conditions
xxxxxxxxxxxx
xxxxxxxxxxxx
xxxxxxxxxxxx
Calibration Results
xxxx
xxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
Calibration Procedure
xxxxxxxxxxxx
xxxxxxxxxxxx
xxxx xxxx xxxx xxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
CALIBRATION INSTRUMENTS
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
xxxxxx
1 RS 232 serial cable
1 USB-key containing reference manual and
software package “JOFRACAL”.
When reordering, please specify the parts number found
in the list of accessories, section 10.0.
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3.2 Preparing the calibrator 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.
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.
105337 04 2015-05-07 13
Note…
The instrument must not be exposed to draughts.
Fig. 1
When setting up the calibrator, you must…
place the calibrator on an even horizontal surface in the spot
you intend to use it.
Caution…
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Do not use the instrument if the fan is out of order.
ensure a free supply of air to the fan located at the bottom of
the instrument.
check the voltage of the power control switch (on/off switch
(230V/115V)). If the voltage of the power control switch
differs from the line voltage, you must adjust the voltage of
the power control switch as follows (see Fig. 1):
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.
A. Open the fuse box lid using a screwdriver.
B. Take out the fuse box.
C. Remove both fuses and insertion tube two new fuses.
These must be identical and should correspond to the
line voltage. See section 10.0.
B. Turn the fuse box 180° and slide it into place.
The calibrator is now ready for use.
check that the earth connection for the instrument is present
and attach the cable.
select an insertion tube with the correct bore diameter. See
section 3.3 for information on how to select insertion tubes.
3.3 Choice of insertion tube
Caution…
Before using new insertion tubes for the calibration, the
insertion tubes must be heated up to maximum temperature -
320°C (608°F) / 650°C (1202°F) - for a period of minimum 30
minutes.
105337 04 2015-05-07 15
Caution…
To get the best results out of your calibrator, the insertion
tube dimensions, tolerance and material are critical. We
highly advise using the JOFRA insertion tubes, as they
guarantee trouble free operation. Use of other insertion
tubes may reduce performance of the calibrator and cause
the insertion tube to get stuck.
Insertion tubes are selected on the basis of the diameter of the sensor
to be calibrated.
Use the table for insertion tubes in section 10.0 to find the correct
parts number.
Alternatively, you may order an undrilled insertion tube and drill the
required hole yourself. The finished dimension should be as follows:
Sensor diameter +0.2
+0.05/-0 mm.
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3.4 Inserting the sensor
Before inserting the sensor and switching on the calibrator, please note
the following important warning:
Warning
Never use heat transfer fluids such as silicone, oil,
paste, etc.
These fluids may penetrate the calibrator and cause
electrical hazard, damage or create poisonous fumes.
Use only insulation plugs supplied by AMETEK
Denmark A/S.
Caution…
The well and the insertion tube must be clean before
use.
Do not pour any form of liquids in the well. It might
damage the well.
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.
Caution – Hot surface
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.
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Insert the sensor as shown in Fig. 2.
Sensor under test
Thermal protection shield
Insertion tube
Fig. 2
In order to spare the sensor and its connections it is recommended to
use a heat protection shield (104216) at high temperatures.
For MTC-140 A only.
Check that the insulation plug fits the diameter of the sensor.
Otherwise replace it.
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If the design of the sensor permits it, you are advised to use an
insulation tube and insulation as shown in Fig. 3.
Fig. 3
105337 04 2015-05-07 19
4.0 Operating the calibrator
4.1 Keyboard, display and connections
Keyboard
Fig. 4
Pos. Description
CALIBRATION INSTRUMENTS
SWITCH
TEST
AUTO
STEP
ESC
MENU
LCD.
SWITCH TEST button used to activate SWITCH TEST.
The function automatically detects the opening/closing
temperatures for thermostats.
AUTO STEP button used to activate AUTO STEP.
The function is used to switch between a series of settemperatures automatically.
ESC/MENU button used as Escape key or to activate the
menu system (hold button down for min. 2 seconds).
ENTER button used to accept chosen options.
DOWN ARROW button used to adjust temperature values
(value decreases) and to select menu options.
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Display
Fig. 5
Pos. Description
UP ARROW button used to adjust temperature values
(value increases) and to select menu options.
CHECKMARK displayed when the calibrator is stable.
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SWITCH TEST input open.
SWITCH TEST input closed.
AUTO STEP symbol used to indicate that the function is
active (symbol flashes repeatedly).
Used to display set-temperatures, time-until-stable and
parameter values in the menu system.
Minute time unit for bottom display.
Fahrenheit temperature unit for bottom display.
Celsius temperature unit for bottom display.
Fahrenheit temperature unit for top display.
Celsius temperature unit for top display.
Used to display Read-temperature and parameters in the
menu system.
Connections
Warning
The connectors, pos. 2 on the front panel, must NEVER
be connected to a voltage source.
Thermostats must not be connected to any other
voltage source during a test.
All connections are located on the front panel.
-
+
Switch Test
RS232
Fuse
230V 5AF/115V 10AF
115V
Fig. 6
Pos. Description
Power control switch with connection for cable and on/off
switch. Also contains the main fuse. See section 7.0 for
information on how to change the fuses and setting the
mains voltage.
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Connection for thermostat test.
Connection for RS232 cable.
C
Note that all PC-equipment, which are connected to the
calibrator must observe the directive IEC950.
4.2 Starting the calibrator
The instrument is initialised and the last calibration date is
The calibration date will be displayed for approx. 2 seconds.
The initialisation process has been completed and the
All settings are stored when the calibrator is switched off.
Switch the calibrator on using the power control switch (pos.
1 in Fig. 6).
displayed:
calibrator is ready for use.
When the instrument is switched back on again, the status will
be the same as when it was switched off.
4.3 Selecting the set-temperature
Press
or to adjust the set-temperature.
The current selection flashes in the bottom display:
°
°C
The starting point is the last chosen set-temperature (even if
the instrument has been switched off).
105337 04 2015-05-07 23
C
C
Press
to accept the change or to cancel.
The calibrator will now heat up/cool down.
The top display continuously shows the read-temperature.
The bottom display shows either the set-temperature or the
estimated time in whole minutes until the calibrator will be
stable:
°
min
When the calibrator is stable the display will show the
checkmark symbol. The instrument will emit an audible alarm
and the estimated time until stable will be replaced by the settemperature:
°
°C
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4.4 Using the SWITCH TEST
SWITCH TEST automatically locates the switch temperature of a
thermostat.
You must enter a temperature range T
temperature is expected to be found. You must also specify the slope
rate to be used during the test in SETUP (the smaller the value, the
more accurate the results of the test and the longer the test will take).
The function can be illustrated using the following example:
min
- T
, within which the switch
max
Fig. 7
Press
.
The symbols
the function is active.
The function can be cancelled at any time by pressing
for SWITCH TEST will flash to indicate that
.
105337 04 2015-05-07 25
C
C
Press
or to select the required T
°C
min
:
Press
to accept your selection.
Press
or to select the required T
max
:
°C
Press
to accept your selection.
The calibrator will now start working towards the T
°
°C
Once the T
has been reached and the calibrator is stable, the
min
instrument will emit an audible alarm and display the status for one
second:
min
:
°
°C
26 2015-05-07 105337 04
C
C
The calibrator will now start working towards the T
rate selected in SETUP. The flashing SWITCH TEST symbol indicates
the current status:
°
°C
The instrument will check for changes in the SWITCH TEST. If no
change has been detected by the time T
is reached, the instrument
max
will register an ERROR.
The calibrator will stabilise at this temperature, and then work towards
the T
using the slope rate selected in SETUP.
min
The flashing SWITCH TEST symbol indicates the current status:
°
°C
The instrument will check for changes in the SWITCH TEST input once
again. If no change has been detected by the time the T
reached, the instrument will register an ERROR.
The results of the test will be displayed as 3 values: an “Open”
temperature, a “Close” temperature and a “Hyste” hysteresis
temperature (the difference between the two temperatures).
The open temperature is shown first:
using the slope
max
has been
min
°C
Press
to display the close temperature:
°C
105337 04 2015-05-07 27
Press
to display the hysteresis temperature:
°C
If a temperature has not been found, the instrument will
display an “Error” (the “Hyste” temperature will also be shown
as an “Error”):
Press
instrument will store the T
SWITCH TEST is activated.
or to end the SWITCH TEST. The
min
Note…
you can activate
temporary results.
or during the test to display the
and T
until the next time the
max
28 2015-05-07 105337 04
4.5 Using the AUTO STEP
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.
The function can be illustrated using the following example:
Fig. 8
Press
.
The
function is active.
The function can be cancelled at any time by pressing
symbol for AUTO STEP flashes to indicate that the
105337 04 2015-05-07 29
Press
(minimum 2 steps, maximum 9 steps):
or to select the required number of steps
Press
to accept your selection.
or to select the required set-temperature for
°C
to accept your selection.
Press
step 1:
Press
Repeat the above procedure for all temperature steps.
Press
the last temperature step.
Press
the calibrator to remain at every step:
to accept your choices once you have adjusted
or to set the amount of extra time you wish
min
Press
to accept your selection.
30 2015-05-07 105337 04
C
The following will be displayed for one second to indicate that the
calibrator is ready to work towards the set-temperature:
°C
The calibrator will now work towards the given set-temperature. An
audible alarm will be emitted once the calibrator is stable.
The calibrator will wait the specified amount of extra time. The
instrument indicates this by counting down the amount of time
remaining:
°
min
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.
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4.6 Using the MENU
Hold down
Press
Press
parameters:
or to switch between the adjustable
for more than approx. 2 seconds:
to select SETUP.
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C
F
If you wish to exit SETUP, simply press
The instrument will ignore all changes if you press
adjusting any of the parameters.
Press
to adjust the parameter.
4.6.1 Adjusting the temperature unit
Press
or to switch between °C and °F:
°
- and
°
.
when
Press
to accept your selection.
105337 04 2015-05-07 33
4.6.2 Adjusting the max-temperature
Press
If the current set-temperature is higher than the new max-
0.1C or 0.1F:
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.
Press to accept your selection.
or to set the max-temperature in steps of
°C
4.6.3 Adjusting the SWITCH TEST slope rate
If you wish to exit SETUP, simply press
.
or to set the SWITCH TEST slope rate to a
°C
Press
temperature between 0.1C and 9.9C/minutes in steps of
0.1C (if your chosen temperature unit is F, the range will
change to between 0.1F and 9.9F/minutes in steps of
0.1F):
Press to accept your selection.
34 2015-05-07 105337 04
4.6.4 Adjusting the extra stability time
The extra stability time is the amount of extra time you wish to elapse
before the checkmark symbol
stabilised.
is displayed after the calibrator has
or to set the time to anywhere between 0 and
min
Press
20 minutes:
Press to accept your selection.
4.6.5 Adjusting the temperature resolution
Press
or to select the required number of decimals:
°C
- and
°C
Press to accept your selection.
105337 04 2015-05-07 35
4.7 Simulation/training
Hold down the
The instrument will then revert to the standard display.
The calibrator’s simulation mode is used to train personnel in the use
of the instrument, etc. The simulation setting differs from the standard
setting as follows:
The instrument will not actually heat up or cool down the well.
The heating and cooling processes are simulated at around 10
The calibrator will remain in simulation mode until it is switched off.
calibrator.
The instrument will display the following screen:
times the normal speed of these operations.
and buttons while you switch on the
36 2015-05-07 105337 04
5.0 Storing and transporting the calibrator
Switch off the calibrator using the power control switch.
Note that the calibration procedure may be interrupted at any time
using the power control switch. Switching off the calibrator during the
calibration process will not damage either the instrument or the sensor.
Caution…
The following guidelines should always be observed when
storing and transporting the calibrator. This will ensure that
the instrument and the sensor remain in good working
order.
S
T
N
E
M
U
R
T
S
N
I
N
O
I
T
A
R
B
I
L
A
C
Fig. 9
105337 04 2015-05-07 37
The following routine must be observed before the insertion tube is
removed and the instrument switched off:
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.
Caution – Cold surface
Below 0°C/32°F (applies only to the MTC-140 A model)
If the calibrator has reached a temperature below
0°C/32°F, ice crystals may form on the insertion tube and
the well. This, in turn, may cause the material surfaces to
oxidize
To prevent this from happening, simply heat up the
calibrator to 100°C/212°F until all water left has
evaporated.
Remove the insulation plug while heating up.
It is very important that humidity in the well and insertion
tube is removed to prevent corrosion and frost expansion
damages.
Do not touch the well or insertion tube when these are
below 0°C/32°F - they might create frostbite.
Remove the insertion tube from the calibrator using the tool for
insertion tube supplied with the instrument as shown in Fig. 9.
Caution – Hot surface
Do not remove the insert from the calibrator before the insert
has cooled down to less than 50°C/122°F.
38 2015-05-07 105337 04
Caution…
The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause corrosion oxidation to
form 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 to avoid damage to the instrument.
Warning
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 to a temperature below
100°C/212°F before placing it in the carrying case.
Never place a hot insertion tube in the optional carrying
case.
Do not touch the well or insertion tube when these are
deep frozen – they can create frostbite.
105337 04 2015-05-07 39
6.0 Errors
If the calibrator detects an error during operation, the instrument will
terminate all functions and display an error code:
ERROR 0001
Likely cause: Defective RTD-sensor or excessively high
temperature measured by the instrument’s internal
sensor.
Warning
The calibrator must be switched off before any attempt to
service the instrument is made. There are no user
serviceable parts inside the calibrator.
Note…
AMETEK Denmark’s liability ceases if:
parts are replaced/repaired using spare parts which are
not identical to those recommended by the manufacturer.
non-original parts are used in any way when operating
the instrument.
AMETEK Denmark’s liability is restricted to errors which
originated from the factory.
Solution: The calibrator should be returned to the
manufacturer for service.
ERROR 0002
Likely cause: The calibration coefficients have not been accepted.
Solution: Try again. If the error message returns, the
calibrator should be returned to the manufacturer
for service.
40 2015-05-07 105337 04
ERROR 0003
Likely cause: An error has occurred in the control circuit.
Solution: The calibrator should be returned to the
manufacturer for service.
ERROR 0004
Likely cause: Incorrect mains frequency setting.
Solution: Mains frequency not compatible with instrument
configuration.
Please contact AMETEK Denmark A/S for
guidance.
Nothing happens when the power control switch (on/off switch)
is pressed.
Likely cause: There is no power to the calibrator.
Solution: Check that the calibrator is correctly connected.
Check the fuse.
If there are no problems with the mains cable or the
fuse, the calibrator should be returned to the
manufacturer for service.
105337 04 2015-05-07 41
7.0 Setting the mains voltage and replacing the fuses
Fig. 10
Warning
The calibrator must be switched off before any attempt
to service the instrument is made. There are no user
serviceable parts inside the calibrator.
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.
Locate the main fuses in the fuse box in the power control
switch and check the voltage of the power control switch
(on/off switch (230V/115V)). If the voltage of the power
control switch differs from the line voltage, you must adjust
the voltage of the power control switch.
42 2015-05-07 105337 04
Open the lid of the fuse box using a screwdriver.
Remove the fuse box.
Remove both fuses and insert two new fuses. These must be
identical and should correspond to the line voltage.
MTC-140: 115V, 2AT = 105014 / 230V, 1AT = 105007
MTC-320/650: 115V, 10AF = 60B302 / 230V, 5AF = 60B301
If the fuses blow immediately after you have replaced them,
the calibrator should be returned to the manufacturer for
service.
Slide the fuse box into place with the correct voltage turning
upwards.
7.1 Returning the calibrator for service
When returning the calibrator to the manufacturer for service, please
enclose a fully completed service information form. Simply copy the
form on the following page and fill in the required information.
The calibrator should be returned in the aluminium carrying case.
Furthermore please follow the guidelines for transportation described in
chapter 5.0 – Storing and transporting the calibrator.
105337 04 2015-05-07 43
Service info
Customer data: Date:
Customer name and address:___________________________________________
Attention and Dept.:___________________________________________________
Fax no./Phone no.:____________________________________________________
Your order no.:_______________________________________________________
Delivery address:_____________________________________________________
Distributor name:_____________________________________________________
Instrument data:
Model and Serial no.:__________________________________________________
Warranty claimed Yes:____ No:_____ Original invoice no.:_________________
___________________________________________________________________
Temp. Sensor Service request: This instrument is sent for
calibration input (please check off):
___ Calibration as left ___ Check
___ Calibration as found and as left ___ Service
___ Accredited calibration as left ___ Repair
___ Accredited calibration as found and as left.
___________________________________________________________________
Diagnosis data/cause for return:
Diagnosis/Fault description:_____________________________________________
___________________________________________________________________
Special requests:_____________________________________________________
___________________________________________________________________
Safety precautions: if the product has been exposed to any hazardous substances, it must be
thoroughly decontaminated before it is returned to AMETEK. Details of the hazardous substances
and any precautions to be taken must be enclosed.
44 2015-05-07 105337 04
8.0 Maintenance
8.1 Cleaning
Caution…
Before cleaning the calibrator, you must switch it off,
allow it to cool down and remove all cables.
The insertion tube must always be removed from the
calibrator after use.
The humidity in the air may cause corrosion oxidation in
the insertion tube inside the instrument. There is a risk
that the insertion tube may get stuck if this is allowed to
happen.
Caution – Hot surface
Do not remove the insert from the calibrator before the insert
has cooled down to less than 50°C/122°F
Warning (all versions)
Never leave hot insertion tubes that 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 to a temperature below
100°C/212°F before placing it in the carrying case.
Do not touch the well or insertion tube when these are
deep frozen – they can create frostbite
105337 04 2015-05-07 45
.
Users should/must carry out the following cleaning procedures as and
when required:
The exterior of the instrument - Clean using water and a soft
cloth.
The cloth should be wrung out hard to avoid any water penetrating
the calibrator and causing damage.
When heavily soiled the exterior of the instrument and the
keyboard can be wiped clean using isopropyl alcohol.
The insertion tube - Must always be clean and should be
regularly wiped using a soft, lint-free, dry cloth.
You must ensure there are no textile fibres on the insertion tube
when it is inserted in the well. The fibres may adhere to the well
and damage it.
If the calibrator has reached a temperature below 0°C/32°F, ice
crystals may form on the insertion tube. This, in turn, may cause
the material surfaces to oxidize (MTC-140 A only).
To prevent this from happening, the insertion tube must be dried.
This is done by heating up the calibrator to min. 100°C/212°F until
all water left has evaporated.
Remove the insulation plug while heating up.
It is very important that humidity in the insertion tube is removed to
prevent corrosion and frost expansion damages.
The well - Must always be clean. Dust and textile fibres should be
removed from the well using e.g. compressed air.
46 2015-05-07 105337 04
Warning
REMEMBER! Wear goggles when using compressed
air!
If the calibrator has reached a temperature below 0°C/32°F, ice
crystals may form on the well. This, in turn, may cause the material
surfaces to oxidize (MTC-140 A only).
To prevent this from happening, the well must be dried. This is
done by heating up the calibrator to min. 100°C/212°F until all
water left has evaporated.
Remove the insulation plug while heating up.
It is very important that humidity in the well is removed to prevent
corrosion and frost expansion damages.
8.2 Adjusting and calibrating the instrument
You are advised to return the calibrator to AMETEK Denmark A/S or an
accredited laboratory at least once a year for calibration and
adjustment.
Alternatively, you can calibrate/adjust the calibrator yourself. You will
need a reference thermometer and a reference sensor with a traceable
certificate. Please follow the instructions given below.
Connect the calibrator to an external precision instrument (e.g. a DTI)
as shown in Fig. 11:
Fig. 11
The instrument is now in adjustment/service mode.
105337 04 2015-05-07 47
Hold down the
control switch.
button while pressing the on/off power
Press
or to toggle between the different options:
Press
to accept your selection.
To exit the adjustment/service mode, switch the instrument off
and on again using the power control switch.
48 2015-05-07 105337 04
8.2.1 Adjusting the calibration date
Adjust the date by toggling through the available days, months and
years. Begin by selecting the required day as shown below:
Press
31.
Press to accept your selection.
Press
FEB / MAR / APR / MAY / JUN / JUL / AUG / SEP /
OCT / NOV / DEC.
Press to accept your selection.
or to select the required day in the interval 1-
or to select the required month from JAN /
Press
or to select a year between 2001–2025.
105337 04 2015-05-07 49
Press to accept your selection. The day will be
adjusted if necessary to ensure the legality of the date.
Finally, the day, month and year will flash:
Press to accept the date.
or
8.2.2 Calibrating/adjusting the instrument
The internal calibration/adjustment is a complex function which is
divided into a number of different steps:
The instrument will disclose the first calibration temperature by
displaying the text “TEMP.1 XXXC” for approx. 1 second:
Calibration temperature for calibrators:
MTC-140 A 1. -15°C / 5°F
2. 20°C / 68°F
3. 60°C / 140°F
4. 100°C / 212°F
5. 140°C / 284°F
press
to cancel the whole selection.
50 2015-05-07 105337 04
C
MTC-320 A 1. 50°C / 122°F
2. 120°C / 248°F
3. 180°C / 356°F
4. 250°C / 482°F
5. 320°C / 608°F
MTC-650 A 1. 50°C / 122°F
2. 200°C / 392°F
3. 350°C / 662°F
4. 500°C / 932°F
5. 650°C / 1202°F
The instrument will now heat up/cool down to reach the first calibration
temperature:
°
°C
Once the calibrator is stable, you need to enter the reference
temperature found using the reference thermometer. The
calibration temperature is suggested as a reference point:
°C
This procedure is repeated for TEMP.2, TEMP.3, TEMP.4 and
TEMP.5.
All five calibration temperatures and associated reference
temperatures have now been entered.
The instrument will now check whether the reference temperatures
which have been entered are within the permitted tolerances.
Permitted tolerances:
MTC-140 A, MTC-320 A: 0,15°C / 0.27°F
MTC-650 A: 0,25°C / 0.45°F
105337 04 2015-05-07 51
If the instrument detects excessive deviations for one or more steps, it
will show a screen reading =ERR. in the top of the display. The text
AdJ. will flash in the bottom of the display to indicate that an
adjustment is required (accept by pressing
If the calibrator is found to be within the permitted tolerances, the
instrument will display the text =OK at the top of the display. The text
Cont. will flash in the bottom of the display to indicate that you may
continue without adjustments:
Press
Press
to repeat an adjustment step when it is shown on the display.
to cancel the adjustment function.
to go back to a previous screen and press
:
)
Press
to toggle between AdJ. and Cont. on the display.
Press
52 2015-05-07 105337 04
coefficients. Next, repeat the entire calibration/adjustment
procedure.
when AdJ. is flashing to calculate a new set of
If the new coefficients deviate by more than 4% from the
standard values, the instrument will display an ERROR 2 in
the display. The calculated coefficients will be ignored:
Press
procedure.
Press
calibration/adjustment procedure and enter a new calibration
date (see section 8.2.1).
to repeat the entire calibration/adjustment
when Cont. is flashing to end the
105337 04 2015-05-07 53
9.0 Technical specifications
The illustration below shows the setup which forms the basis for the
technical specifications.
Fig. 12
54 2015-05-07 105337 04
Pos. Description
Calibrator
Ø4.2 mm insertion tube
Insulation 30 x 30 mm
Insulation tube for Ø4 mm sensor
Ø4 mm Pt 100 sensor with traceable certificate
DTI 1000 reference precision thermometer with traceable
certificate
Thermal specifications 1
1
All specifications are given with an ambient temperature of 23°C/73.4°F
± 3°C/5.4°F
2
Specified at 115V / 230V
Specifications Model
MTC-140 A
Max. Temperature :
Min. Temperature :
-17°C / 1°F @ ambient temperature 23°C / 73°F
-2°C / 28°F @ ambient temperature 40°C / 104°F
Display resolution :
Stability :
Accuracy *
12 months :
36 months : ±0.8°C / ±1.44°F
±0.05°C / ±0.09°F
140°C / 284°F
-30°C / -22°F @ ambient temperature 0°C / 32°F
0.1°C / 0.1°F
±0.4°C / ±0.72°F
105337 04 2015-05-07 55
Specifications Model
Heating, 2 : 15 min.
23°C to max.
Time to stability :
5 min.
Cooling, :
25 min.
max. to min.
MTC-320 A
Max. Temperature :
320°C / 608°F
Min. Temperature : 33°C / 91°F @ ambient temperature 23°C / 73°F
Display resolution :
Stability :
±0.1°C / ±0.18°F
0.1°C / 0.1°F
Accuracy *
12 months :
36 months : ±1.2°C / ±2.16°F
Heating,
2
: 4 min.
±0.5°C / ±0.9°F
23°C to max.
Time to stability :
8 min.
Cooling, :
29 min.
max. to min.
MTC-650 A
Max. Temperature :
650°C / 1202°F
Min. Temperature : 33°C / 91°F @ ambient temperature 23°C / 73°F
Display resolution :
Stability :
±0.1°C / ±0.18°F
0.1°C / 0.1°F
Accuracy *
12 months :
±0.9°C / ±1.62°F
36 months : ±1.8°C / ±3.24°F
56 2015-05-07 105337 04
Specifications Model
Heating,
2
: 10 min.
23°C to max.
Time to stability :
8 min.
Cooling, : 44 min.
max. to min.
* Accuracy : Drift over time depends on actual use, environment and handling. The
specified 1 year and 3 year accuracy includes typical drift based on 70 calibrations pr.
year at maximum temperature for 1 hour.
Electrical specifications
Specifications Model
MTC-140 A
Power supply [VAC],
115VAC, 45-65Hz : 90-127
230VAC, 45-65Hz : 180-254
Power
consumption, [VA] :
150
Test voltage, :
switch test [V]
5
MTC-320 A
Power supply [VAC],
115VAC, 45-65Hz : 90-127
230VAC, 45-65Hz : 180-254
Power
consumption, [VA] :
1150
Test voltage, :
switch test [V]
5
105337 04 2015-05-07 57
Specifications Model
MTC-650 A
Power supply [VAC],
115VAC, 45-65Hz : 90-127
230VAC, 45-65Hz : 180-254
Power
consumption, [VA] :
1150
Test voltage, :
switch test [V]
5
Mechanical specifications
Specifications Model
MTC-140 A
Weight
Dimensions
HxWxL : 325 x 139 x 241 mm / 12.80 x 5.47 x 9.49 inch
Operating temp. :
Storage temp. :
Humidity range :
Protection class :
Weight : 5.0 Kg. / 11.0 Lbs.
Dimensions
HxWxL : 325 x 139 x 241 mm / 12.80 x 5.47 x 9.49 inch.
Operating temp. :
: 6.5 Kg. / 14.3 Lbs.
0 - 40°C / 32 - 104°F
-20 - 50°C / -4 - 122°F
0-90% Rh
IP10
MTC-320 A
0 - 40°C / 32 - 104°F
58 2015-05-07 105337 04
Specifications Model
Storage temp. :
Humidity range :
Protection class :
Weight : 6.4 Kg. / 14.1 Lbs.
Dimensions
HxWxL : 325 x 139 x 241 mm / 12.80 x 5.47 x 9.49 inch.
Operating temp. :
Storage temp. :
Humidity range :
Protection class :
-20 - 50°C / -4 - 122°F
0-90% Rh
IP10
MTC-650 A
0 - 40°C / 32 - 104°F
-20 - 50°C / -4 - 122°F
0-90% Rh
IP10
Additional data - directives observed
The following standards are observed
according to the EMC-Directive
(2004/108/EC)
The following standards are observed
according to the low voltage-directive
(2006/95/EC)
105337 04 2015-05-07 59
EN 61326-1: 2006: Electrical equipment for
measurement, control and laboratory use –
EMC requirements in standard environment and
industrial location.
EN61010-1:2010 : Safety requirements for
electrical equipment for measurement, control
and laboratory use, part 1: General requirement
EN61010-2-030:2010 : Safety requirements for
electrical equipment for measurement, control
and laboratory use, part 2-03: Particular
requirements for testing and measuring circuits
Approvals
Approved by “Det Norske Veritas” DNV.
60 2015-05-07 105337 04
10.0 List of accessories
All parts listed in the list of accessories can be obtained from the
factory through our dealers.
Please contact your dealer for assistance if you require parts which do
not appear on the list.
List of accessories
Accessories Parts no.
Fuse 115V, 10AF (MTC-320/650 A) 60B302
Fuse 230V, 5AF
Fuse 115V, 2AT
Fuse 230V, 1AT
Reference manual 105337
Tool for insertion tube 60F170
Heat protection shield 104216
Alu. carrying case, high 123408
Mains cable, 115V, US, type B 60F135
Mains cable, 240V, UK, type C 60F136
Mains cable, 220V, South Africa, type D 60F137
Mains cable, 220V, Italy, type E 60F138
Mains cable, 240V, Australia, type F 60F139
Mains cable, 230V, Europe, type A 60F140
Mains cable, 230V, Denmark, type G 60F141
Mains cable, 220V, Switzerland, type H 60F142
Mains cable, 230V, Israel, type I 60F143
Insulation tube, 100 mm 65-F100
Insulation tube, 150 mm 65-F101
Insulation tube, 200 mm 65-F102
Insulation tube, 250 mm 65-F103
(MTC-320/650 A) 60B301
(MTC-140 A) 105014
(MTC-140 A) 105007
105337 04 2015-05-07 61
List of accessories
Accessories Parts no.
Insulation tube, 300 mm 65-F104
Insulation tube, 350 mm 65-F105
Insulation tube, 400 mm 65-F106
Insulation tube, 450 mm 65-F107
Insulation 30 x 30 mm 105173
Cleaning brush, 4 mm 122832
Cleaning brush, 6 mm 60F174
Cleaning brush, 8 mm 122822
Set of insulation plugs (MTC-140 A only) 123469
Set of test cables 104203
RS232 serial cable 105366
JofraCal PC software 124915
Certificate, National 99-C-T
62 2015-05-07 105337 04
11.0 Standard insertion tubes
Caution…
To get the best results out of your calibrator, the insertion
tube dimensions, tolerance and material are critical. We
highly advise using the JOFRA insertion tubes, as they
guarantee trouble free operation. Use of other insertion
tubes may reduce performance of the calibrator and cause
the insertion tube to get stuck.
PARTS NO. FOR STANDARD INSERTION TUBES
Sensor
size
undrilled
1/8”
3/16”
1/4”
5/16”
3/8”
7/16”
1/2”
9/16”
5/8”
11/16”
13/16”
3/4”
7/8”
MTC-140 A
60F448
60F450
60F452
60F454
60F456
60F458
60F460
60F462
60F464
60F466
-
-
-
-
MTC-320 A
100175
100176
100178
100180
100181
100184
100187
100189
60F344
100192
60F348
60F352
100193
60F354
MTC-650 A
100194
100195
100197
100199
100200
100203
100205
100207
60F408
100210
60F412
60F416
100211
60F418
105337 04 2015-05-07 63
PARTS NO. FOR STANDARD INSERTION TUBES
Sensor
size
3 mm
4 mm
5 mm
6 mm
7 mm
8 mm
9 mm
10 mm
11 mm
12 mm
13 mm
14 mm
15 mm
16 mm
18 mm
20 mm
Description
MTC-140 A
123428
60F451
123429
60F453
123430
105185
105186
105187
123431
123432
123433
-
-
-
-
-
PART NO. FOR STANDARD INSERTION TUBES – MULTI-HOLE
MTC-140 A
MTC-320 A
123436
100177
123437
100179
123438
100182
100183
100185
100188
100186
60F339
100190
100191
123439
123440
123441
MTC-320 A
MTC-650 A
123444
100196
123445
100198
122516
100201
100202
105188
100204
100206
105189
100208
100209
123446
122517
122518
MTC-650 A
Metric
Type 1
Inch
Type 2
123479
123480
Note: All multi-hole insertion tubes are delivered with a matching insulation plug
(MTC-140 only).
123475
123477
123476
123478
64 2015-05-07 105337 04
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www.ametekcalibration.com
United Kingdom
Tel +44 (0)1243 833 302
jofra@ametek.co.uk
France
Tel +33 (0)1 30 68 89 40
general.lloyd-instruments@ametek.fr
Germany
Tel +49 (0)2159 9136 510
info.mct-de@ametek.de
Denmark
Tel +45 4816 8000
jofra@ametek.com
Information in this document is subject to change without notice. ©2015, by AMETEK, Inc., www.ametek.com. All rights reserved.
USA
Florida
Tel +1 (800) 527 9999
cal.info@ametek.com
California
Tel +1 (800) 444 1850
crystal@ametek.com
India
Tel +91 22 2836 4750
jofra@ametek.com
Singapore
Tel +65 6484 2388
jofra@ametek.com
China
Shanghai
Tel +86 21 5868 5111
Beijing
Tel +86 10 8526 2111
jofra.sales@ametek.com.cn
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