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JOFRA ATC SERIES
DRY-BLOCK CALIBRATORS AND LIQUID BATH CALIBRATORS
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Model and
temperature range
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ATC-140 |
-20 to 140°C (-4 to 284°F) |
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ATC-156 |
-24 to 155°C (-11 to 311°F) |
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ATC-157 |
-45 to 155°C (-49 to 311°F) |
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ATC-250 |
28 to 250°C (82 to 482°F) |
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ATC-320 |
33 to 320°C (91 to 608°F) |
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ATC-650 |
33 to 650°C (91 to 1202°F) |
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State-of-the-art
well design - Optimized for accuracy
The ATC series employs the newest
technology in dry-block design. The
active dual-zone design ensures
excellent temperature homogeneity in the
calibration zone of the block
independent of the load
(sensor-under-test). The insert is so
big that there is room for both the
sensor-under-test and the external
reference probe.
More about the dual-zone active block
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External reference
input
All 'B' models feature a four-wire
true-ohm-measurement RTD input for an
external reference temperature probe.
The new JOFRA STS-100 series of
reference probes contains an angled
probe. This probe leaves room for the
connection head of the
sensor-under-test.
Sensor-under-test input
All 'B' models also feature a
universal input for electrical
connection of the sensor-under-test. RTD,
TC, TX, thermo switch, and V. Convert
the input to temperature and read the
results in the big LCD display.
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Switch test -
Fully automatic test of thermo switches.
The calibrator will find the closing and
the opening temperatures and calculate
the hysteresis. This makes you save time
and leaves you free to concentrate on
other things while the test is running.
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Auto step -
The calibrator will automatically change
to the next programmed value. This
allows the calibrator to be placed
anywhere in the process while you
monitor the output from the
sensor-under-test in the control room. |
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Automatic
stand-alone calibration - Download
your calibration tasks (work orders) to
the ATC calibrator and run the test in
the field. Return to your base and
upload the calibration results including
both as-found and as-left results. |
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MVI circuitry
- The MVI technology removes the
stability problem caused by an unstable
mains supply. This is very often a
problem in production environments with
large electric motors, heating elements,
etc. cycling on and off. The MVI gives
correct and safe calibrations.
More about MVI circuitry |
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Stability
indicator - Clear audio and visual
indication in the display when the
calibrator is stable.
Checking both the sensor-under-test, the
reference probe, and the calibrator. |
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Simplified calibration documentation
- All ATC series calibrators are
delivered with an RS232 serial interface
and the JOFRACAL calibration software.
JOFRACAL software presents the means for
an entirely automatic calibration of
sensors and a semi-automatic calibration
of the complete process loop through the
use of a PC.
More about JOFRACAL. |
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JOFRA ATC-156 -
Offers calibration of short 'Clamp'
sensors
JOFRA offers a complete, highly
accurate, and portable
calibration-solution. The kit is
designed around an ATC-156 dry-block
calibrator which features the dual-zone
technology. Customized inserts and a
reference sensor have been developed
specifically for this application. Avoid
cumbersome and lengthy liquid bath
calibrations and the performance issues
associated with older dry-block
calibrators. |
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Key specifications: |
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Spec's at
23°C (73°F) ambient
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ATC-140 |
ATC-156 |
ATC-157 |
ATC-250 |
ATC-320 |
ATC-650 |
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Dual-zone
Heating block |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Liquid bath
configuration |
Yes |
No |
No |
Yes |
No |
No |
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Min. temp. |
-20°C
(-4°F) |
-24°C
(-11°F) |
-45°C
(-49°F) |
28°C
(82°F) |
33°C
(91°F) |
33°C
(91°F) |
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Max. temp. |
140°C
(°284F) |
155°C
(°311F) |
155°C
(°311F) |
250°C
(°482F) |
320°C
(608°F) |
650°C
(1202 F) |
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Accuracy A
model |
0.20°C
(0.36°F) |
0.19°C
(0.34°F) |
0.19°C
(0.34°F) |
0.30°C
(0.54°F) |
0.26°C
(0.47°F) |
0.39°C
(0.7°F) |
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Accuracy B
model |
0.04°C
(0.07°F) |
0.04°C
(0.07°F) |
0.04°C
(0.07°F) |
0.07°C
(0.13°F) |
0.07°C
(0.13°F) |
0.11°C
(0.2°F) |
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Stability
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0.02°C
(0.04°F) |
0.02°C
(0.04°F) |
0.02°C
(0.04°F) |
0.02°C
(0.04°F) |
0.02°C
(0.04°F) |
0.03°C
(0.06°F) |
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Immersion
depth |
180 mm
(7.1 in)
- dry-block
150 mm
(5.9 in)
- liquid bath |
160 mm
(6.3 in) |
160 mm
(6.3 in) |
150 mm
(5.9 in)
- dry-block
150 mm
(5.9 in)
- liquid bath |
150 mm
(5.91 in) |
150 mm
(5.91 in) |
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Insert
diameter |
63,5 mm
(2.5 in) |
30 mm
(1.18 in) |
20 mm
(0.79 in) |
63,5 mm
(2.5 in) |
30 mm
(1.18 in) |
30 mm
(1.18 in) |
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