Ametek RTC-156, RTC-157 Specifications
temperature
»
High accuracy
Down to ±0.04°C using the external reference sensor. 4-wire True-Ohm-Measurement
technology is used.
»
Excellent stability 0.005˚C
»
Wide temperature range
RTC-156 from -30 to 155°C (-22 to 311°F)
RTC-157 from -45 to 155°C (-49 to 311°F)
»
Improved temperature
homogeneity
Unique active dual-zone block ensures good
temperature homogeneity in the calibration
zone
Best dry-blocks
on the market!
Reference Temperature Calibrator
Model RTC-156 & RTC-157
»
DLC
Dynamic Load
Patent
pending!
Compensation
Perfect temperature uniformity in
the insert, even when calibrating large sensors or many sensors at a time.
B and C models only
»
Display indicator
for temperature uniformity
Shows the degree of temperature uniformity in
the insert when using the new DLC technology.
B and C models only
»
Intelligent reference sensors
JOFRA reference sensors are supplied with
intelligent plugs, holding the calibration data
(coefficients) of the reference sensor. This is
a truly plug’n’play calibration system
»
USB communication
All RTC calibrators communicate via an
easy-to-use USB port
»
EURAMET
Best performing dry-block with regard to the
EURAMET/cg-13/v.01 guideline for testing of
dry blocks
ISO 9001 Manufacturer
Specification Sheet, SS-RTC-156/157
DLC
AMETEK continues to develop new techniques to improve performance,
accuracy, convenience and functionality of the well-known JOFRA calibration products. By doing so, we maintain our position as the leading
worldwide manufacturers of temperature dry-block calibrators.
We are proud to introduce our top model RTC (Reference Temperature
Calibrator), which is no exception to the above and even more sophisticated than any existing calibrators.
The RTC offers many new fantastic features, such as:
• Patent pending DLC, Dynamic Load Compensation system, for perfect
temperature uniformity in the insert
• Unique intelligent sensors for plug’n’play connection
• USB connector for communication
• Easy-to-read color VGA display with perfect overview of the actual status
• Intuitive, fast and user-friendly navigation
• Lightweight and easy to carry around
• New functional carrying case design
• New multi-hole insert kits covering all the most used sensor sizes
• High profile design and the well-known long lasting JOFRA quality
The new RTC calibrator comes in three different models – A, B, and C.
• RTC-A reference temperature calibrator
• RTC-B reference temperature calibrator with input for reference sensor,
DLC sensor and sensors-under-test
• RTC-C reference temperature calibrator with input for reference sensor
and DLC sensor
Unique temperature performance
The RTC series of calibrators provides precision temperature calibration of sensors, whatever the type or format.
This is accomplished through an innovative active dualzone heating technology.
The JOFRA RTC-series features our well-known active dualzone heating technology. Each heating zone is independently controlled for precision temperature calibration. The
homogeneity in the lower part is close to that of a laboratory
liquid bath. The lower zone ensures optimum heat dissipation throughout the entire calibration zone. The upper zone
compensates for heat loss from the sensor-under-test and
from the open top. This design also eliminates the need for
extra insulation of sensors-under-test and makes it possible
to calibrate liquid-filled and other mechanical sensors.
DLC - Dynamic Load Compensation
To bring our well documented active dual-
Patent
pending!
zone technology to an even higher level, we
have developed the patent pending new DLC
system.
tionality, the RTC is the best performing dry-block calibrator
on the market, when being calibrated and tested according
to the globally accepted EURAMET/cg-13/v.01 guideline for
calibration and testing of dry-blocks.
The DLC system comprises a special differential temperature
sensor designed especially for the RTC. The sensor is placed
in the insert and connected to the calibrator. When the DLC
function is enabled, the calibrator will automatically equalize
the temperature homogeneity inside the insert on top of the
normal temperature control and stabilization.
DLC - User advantages
Calibrating with DLC sensor gives the following advantages:
1. Calibration of several sensors simultaneously
2. Calibration of thick sensors
3. Gives TSL (Thermo Sensitive Length) independency. It is
no longer necessary to know the TLS of the sensor
4. Compensates for sensor production tolerances like the
PT100 element being mounted in various positions in
the sensor
5. Trouble free calibration of sensors with PT100 elements
up to 60 mm length
6. The DLC indicator proves that the dual-zone is active an
functioning well
7. Proves that the calibrator is working perfect. The DLC
value should be very close to 0.00 when the calibrator
is loaded with DLC sensor and an external reference
sensor
8. Together with the stability indication, the CLD indicates
when the calibration values can be read
This newly developed unique feature makes it possible
to perform top calibration specifications without being affected by the actual load e.g. many sensors or very big sensors.
A new DLC sensor, Dynamic Load Compensation sensor,
has been specially developed for this purpose.
The RTC calibrator features the active dual zone temperature control which improves the homogeneity in the well by
adjusting the temperature in the top of the well to the same
temperature as in the bottom. The dual zone keeps this difference at a minimum.
The new DLC sensor
improves the homogeneity even more by controlling
the homogeneity not only in
the well, but also inside the
insert, where the sensorsunder-test are placed during
calibration. The DLC sensor
measures the temperature
homogeneity in the insert
and provides feedback to
the active dual-zone system,
which now compensates the
temperature difference to a
minimum inside the insert.
In this way, the DLC function makes the homogeneity
independent of the different
loads of the insert.
Based on the new DLC func-
DLC Sensor
Axial temperature curves for a RTC calibrator with and without the DLC functionality activated
USB connector for communication
Another new RTC feature is the USB connection that facilitates easy communication with JOFRACAL. The USB connection also supports easy download of future firmware
upgrades.
The new USB connection provides fast and easy access to
all laptops without the need of RS-232 to USB converters.
Future-proof through e.g. a flash capability for easy firmware upgrades as well as already integrated LAN communication, SD-card slot and USB host connectors for future
use.
NEW!
2 www.ametekcalibration.com Reference Temperature Calibrator • RTC-156/157
NEW!
plug’n’play
Intelligent reference sensors
The JOFRA STS-200 intelligent reference sensors as well
as the new DLC sensor are all containing all individual calibration data regarding the sensor.
Firstly, this means that the time-consuming coefficient
downloading sequence with risk of errors is no longer necessary. Secondly, the user can change the reference sensor
and be up and running immediately.
With the intelligent sensors, AMETEK has eliminated a
source of error and the system is now giving a fail-safe
plug’n’play calibration system.
Unique
reference sensors
The new STS-200 reference sensors and the DLC
sensors have been specially designed. They are
both angled 90˚ and have
been customized to fit the
calibrator so they are only
slightly higher than the top
of the RTC calibrator.
The unique design makes
it possible to calibrate
threaded sensors and sensors with connection heads
without any problems.
Only
10.5 kg
Easy to carry
A calibrator is carried from one job to another. Therefore,
it is essential that the weight of the calibrator is as low as
possible.
New multi-hole insert kits
Two special multi-hole insert kits have been developed to
comply with calibration of almost any sensor diameter without having to buy numerous inserts.
The first kit is a metric insert kit consisting of only four
inserts covering all diameters from 3 to 13mm. The other is
an imperial insert kit consisting of only three inserts covering six different sizes from ⅛” to ½”.
All inserts have holes for
NEW!
Wide temperature range
The RTC-series can perform calibration over a very wide
temperature range starting from -45°C and up to 155°C
(-49 to 311°F). This makes it possible to perform calibration
jobs over a range of 200°C (360°F) with only one calibrator.
both STS reference sensors and DLC sensors.
With this new insert kit
in the carrying case,
the user is now able to
calibrate all commonly
known sensor sizes.
These new insert kits are
part of the JOFRA lightweight strategy.
-45˚C
Easy-to-read
color display and user-friendly navigation
The new 5.7” full color VGA display is very easy to read.
The main temperatures, like SET, READ, TRUE and SUT
(Sensor under test), are always displayed at all stages of the
programming or calibration procedure.
NEW!
We have thoroughly included the weight issue in our design
and have developed new design techniques that have
made the RTC calibrator lightweight and easy to carry
around without compromising its quality, durability and
functionality.
The purpose of minimizing the weight of the RTC calibrator
is to protect, especially frequent users from overload.
Same size of inserts
The new cooling calibrator RTC-156/157 are using the
same insert dimensions (30x150mm) as some of our existing calibrators. This makes it possible to reuse inserts from
other calibrators.
-24˚C
@15 min.
Fast temperature calibration
Time is money! This is why all the new RTC calibrators
have an increased heating and cooling speed compared to
all other calibrators. Heating and cooling speed has been
increased by up to 20%. The implication is savings in both
production downtime and general calibration costs.
The navigation is menu-driven and very logical to use and
the display shows any important information needed for the
current function in use. The communication windows pop
up and are followed by discrete sound messages.
The display is very bright and the main information can easily be read from a distance.
The large display contains more detailed information at a
glance, such as:
• Stability status
• Load compensation status
• Real time clock
• Serial number of reference sensor
• Sensor-under-test status
www.ametekcalibration.com 3RTC-156/157 • Reference Temperature Calibrator
Special designed carrying case
NEW!
AMETEK has designed an all-in-one-handle carrying case.
We have now made it possible to store both the STS reference sensors and DLC sensors in the carrying case with an
optimum physical protection. There is room for inserts and
insulation plugs to cover all dimensions and compartments
for the new integrated support rod set, wires, manuals, certificates, plugs, insert tools etc.
All rooms are specially designed to hold one of the above
mentioned items. This makes it very easy to keep track of
any accessories.
For optimum protection of the cali-brator and the accessories, the compartments are designed to hold the accessories
fixed during transportation.
Integrated support rod
The new integrated support rod is part
of the reduced weight philosophy. It is
lightweight and very easy to mount on
the RTC. Two fixing holes are integrated
in the calibrator where the support rods
can be mounted.
NEW!
SET-Follows-TRUE (model B & C only)
Available on B and C models only, the “SET-Follows-TRUE”
makes the instrument tune in until the temperature reading
of the external reference “TRUE” meets the desired “SET”
temperature. This feature is important when it is critical that
the temperature of the calibration zone matches the desired
temperature when measured with accurate external reference sensors.
Reading of sensor-under-test (model B only)
Model B of the RTC is equipped with a built-in accurate measuring circuit for sensor-under-test (input), which
enables measurement of virtually any type of temperature
sensors including: Resistance thermometers (RTD), thermocouples (TC), transmitters, milliamps (mA), voltage (V)
and thermostats
The RTC calibrators can be user-programmed from the
keyboard for fully automatic sensor calibrations. Once the
unit is programmed, the instrument is self-operating and
performs the configured calibration routine. All calibration
data are stored and can be read in the display.
MVI - Secure temperature stability
MVI stands for ’’Mains power Variance Immunity’’.
Unstable mains power is 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 JOFRA RTC calibrators all employ the MVI functionality, thus avoiding such stability problems. The MVI functionality is obtained by running the calibrator on stabilized
DC voltage.
Highest accuracy (model B & C only)
The RTC series calibrators may be supplied with a built-in
reference thermometer to be used with an external reference sensor. This feature allows the instrument to perform
calibrations on-site, while maintaining a high accuracy.
Switch test (model B only)
Users may perform a thermoswitch test and find “Open”,
“Closed” and the hysteresis (deadband) automatically. The
instrument retains the last twenty test results.
Auto-stepping
Up to 20 different temperature steps may be programmed
including the hold time for each step. Upon completion of
an auto step routine, the user can easily read the results
for the sensor-under-test on the RTC display. Results from
twenty auto-step calibrations are stored.
The “Set temperature” feature allows the user to set the
exact desired temperature with a resolution of 0.001°.
A special 90° angled external reference sensor has been
designed to accommodate calibration of sensors with a
transmitter head, top connector or similar arrangement.
The user can decide whether to read the built-in reference
sensor or the more accurate angled reference sensor from
the large, easy-to-read LCD display of the calibrator. The
external sensor and the internal sensor readings are independent of one another.
4 www.ametekcalibration.com Reference Temperature Calibrator • RTC-156/157
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