Ametek ITC 155, ITC 320, ITC 650 Specifications
t e m p e r a t u r e
Wide temperature range
ITC-155 -23 to 155°C / -9 to 311°F
ITC-320 33 to 320°C / 91 to 608°F
ITC-650 33 to 650°C / 91 to 1202°F
Improved temperature homogeneity
The unique dual-zone heating block
ensures good temperature homogeneity
in the critical calibration zone of the heating
block
Enhanced accuracy and stability
MVI circuitry ensures temperature stability
despite mains supply variations
Timesaving features
Fast one-key-one-function access to the automatic switch test and the step
function
Industrial Temperature Calibrator
ITC-155/320/650
Improved
accuracy
specifications
High accuracy and long-term stability
Specified drift over a one year period
of time. Improves the reliability of the JOFRA
ITC series
Documentation made easy
RS232 communication and JOFRACAL calibration software are included in the standard
delivery
The JOFRA ITC series is the mid-range dry-block calibrator model
offered by AMETEK. The design basis for the ITC series is portability and
ease-of-use supplied at a reasonable cost without sacrificing accuracy,
performance, and features.
The ITC series incorporates the features of the high-end ATC series with
the functionality of the standard CTC series dry-block calibrators.
The ITC series employs the slim and rugged design of the CTC series.
This series also features the intuitive user interface, the clear LCD display, and the functionality that is used in the successful CTC series.
However, the ITC is designed with the state-of-the-art dual-zone heating
block and MVI circuitry that has been adopted from the ATC series. The
MVI circuitry ensures stable temperatures even when the mains supply
is unstable.
The ITC series is designed for both on-site and maintenance shop use.
The applications are generally critical process control but can vary based
on calibration and testing requirements.
The ITC series dry-block calibrators are available in 3 different temperature ranges and all models are equipped with RS232 serial communication capabilities. The standard delivery also includes the JOFRACAL
calibration PC software.
ISO 9001 Manufacturer
Specification Sheet
SS-ITC
ITC-320 & ITC-650 dual-zone heating block
The specialized block design increases the temperature homogeneity in the critical calibration zone. It also
minimizes the need to insulate the sensors-under-test
and makes it possible to calibrate liquid-filled and other
mechanical sensors.
The main, or lower, zone ensures optimum heat dissipation throughout the entire block. The secondary, or upper,
zone compensates for the heat loss from the top of the
block and from the sensor-under-test.
ITC-155 heating/cooling block
The model ITC-155 features improved Peltier elements
that employ a ’’Multi-Stage Technology’’. This both
improves efficiency and extends the useful life of the heating/cooling block.
Maximum temperature
From the setup menu, the user can select the maximum
temperature limit for the calibrator. This function prevents
damage to the sensor-under-test caused by the application of excessive temperatures. The feature also aids in
reducing drift resulting from extended periods of exposures to high temperatures. This feature can be locked
with an access code.
MVI - Improved temperature stability
MVI stands for ’’Mains power Variance Immunity’’.
Unstable mains power supplies are a major contributor to
on-site calibration inaccuracies. Traditional temperature
calibrators often become unstable in production environments where large electrical motors, heating elements,
and other devices are periodically cycled on or off. The
cycling of supply power can cause the temperature regulator to perform inconsistently leading to both inaccurate
readings and unstable temperatures.
The ITC series employ the MVI, thus avoiding such stability problems. The MVI circuitry continuously monitors the
supply voltage and ensures a constant energy flow to the
heating elements.
Peltier effect (ITC-155)
In 1834, Jean Peltier, a French physicist found that an
’’opposite thermocouple effect’’ could be observed when
an electric current was connected to a thermocouple. Heat
would be absorbed at one of the junctions and discharged
at the other junction. This effect is called the ’’PELTIER
EFFECT’’.
The practical Peltier element (electronic heating pump)
consists of many elements of semiconductor material connected electrically in series and thermally in parallel. These
thermoelectric elements and their electrical interconnections are mounted between two ceramic plates. The plates
serve to mechanically hold the overall structure together
and to electrically insulate the individual elements from
one another.
Easy-to-use, intuitive operation
All instrument controls may be performed from the front
panel. The heat source is positioned away from the panel.
This design helps to protect the operator.
The main functions on the ITC series are designed with
one-key-one-function logic. This means that there are no
sub-menus or difficult to remember multiple keystrokes
necessary to access primary functions.
The easy-to-read, backlit display features dedicated icons,
which help in identifying instrument conditions and operational steps.
2 www.jofra.com Industrial Temperature Calibrator • ITC
Set temperature
AUTO
STEP
ESC
MENU
SWITCH
TEST
1
2
3
4
START
AUTO
STEP
ESC
MENU
SWITCH
TEST
START
Slope rate
(Ramp)
AUTO
STEP
ESC
MENU
SWITCH
TEST
The ’’Up’’ and ’’Down’’ arrow keys allow the user to set
the exact temperature desired with a resolution of 0.1°.
Instrument setups
The ITC series stores the complete instrument setup,
including: engineering units, stability criteria, resolution,
display contrast, slope (ramp) rate, auto-step settings, and
maximum temperature.
Stability indicator
A bold checkmark on the display indicates that the calibrator has reached the desired set temperature and is
stable. The operator may change the stability criteria and
establish a greater sense of security in the calibration
results. A convenient countdown timer is activated five
minutes before the unit reaches stability.
Automatic switch test
Operators can save a lot of time using the automatic thermoswitch test function to find values for the ’’Open’’ and
’’Close’’ temperatures. Additionally, this feature displays
the hysteresis (deadband) between the two points. The
feature ensures a very high repeatability when testing
thermoswitches. Simply press the ’’SWITCH TEST’’ key to
activate the function.
Re-calibration/adjustments
The ITC series has a very easy and straightforward procedure for re-calibration/adjustment. There is no need for a
screwdriver or PC software. The only thing you need is a
reliable reference thermometer.
Place the probe in the calibrator and follow the instructions on the display. Third-party labs and calibration facilities will be able to perform this function if a certificate
from an independent source is necessary. Of course,
AMETEK can provide you with a traceable calibration certificate from our labs when you require a higher level of
confidence.
Calibration of up to 24 sensors with JOFRA ASM
Using the JOFRA ITC series together with the ASM
Advanced Signal Multi-scanner offers a great time-saving
automatic solution to calibrate multiple temperature sensors at the same time.
The ASM series is an eight channel scanner controlled by
JOFRACAL software on a PC. Up to 3 ASM units can be
stacked to calibrate up to 24 sensors at the same time.
It can handle signals from 2-, 3- and 4 wire RTD’s, TC’s,
transmitters, thermisters, temperature switches and voltage.
Please also see more in specification sheet SS-CP-2360,
which can be found at www.jofra.com
Auto-stepping
This feature saves manpower. The operator may stay in
the control room, or another remote location, monitoring the output from the sensor-under-test while the ITC
series calibrator is placed in the process and automatically
changes the temperature using a programmed step value
and rate. Up to 9 different temperature steps may be programmed, including the hold time for each step.
www.jofra.com 3ITC • Industrial Temperature Calibrator
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