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1502A Tweener PRT Readout
The 1502A Tweener features accuracy up to ±0.006°C (the 1504
is even more accurate, up to ±0.002°C). In addition, it
reads 100-ohm, 25-ohm, and 10-ohm probes, has a resolution
of 0.001°C across its entire range, and is the smallest unit
in its class. It also has an optional battery pack for
completely portable operation.
Each Tweener is programmable to match a probe’s constants
for maximum linearity and accuracy. All probe constants and
coefficients are programmed through simple, front-panel
keystrokes. Temperature is displayed in °C, °F, K, or
resistance in ohms.
The 1502A accurately measures the resistance of the probe
and then converts the resistance to a temperature value
using its built-in algorithms.
For convenience, the 1502A reads the common industrial grade
IEC-751 or “385” ALPHA RTD without any programming. Enter
the actual R0 and ALPHA of the individual probe for
increased accuracy. For maximum accuracy, use the ITS-90
formulas. The Tweener accepts the sub-ranges 4 and 6 through
11.
ITS-90 formulas reside in the Tweener’s firmware. If your
probe has been calibrated for any of the above sub-ranges of
the ITS-90, you simply enter the coefficients directly into
your Tweener.
Each thermometer comes complete with an RS-232 interface for
automation of temperature data collection, calibrations, or
process control functions. An IEEE-488 interface is
available as an option.
The 1502A is calibrated digitally using the front-panel
buttons. You never have to open the box to calibrate it.
This calibration protocol further reduces the cost of the
1502A. It goes where you go and works the way you want it
to.
1504 Tweener Thermistor Readout
If you need more accuracy in a limited temperature range,
the Model 1504 Tweener gives it to you as a thermistor
readout. Thermistors are less fragile than PRTs and less
likely to be impacted by mechanical shock. Thermistors are
more sensitive to temperature, have faster response times,
and come in many shapes for different applications.
Typical accuracy of a 1504 is ±0.002°C with a resolution of
0.0001°C.
Software
With our 9934 LogWare, both Tweener models may be
used for real-time data acquisition. Collect data and
analyze it graphically or statistically. Additionally,
Tweeners may be used as reference thermometers with our
MET/TEMP II software.
Battery Pack
Want to take your Tweener on the road? Order Hart’s 9320A
Battery Pack. Our battery gives you 36 hours between
charges, allowing you to take your work wherever you need.
Calibration Choices
Each Tweener and its accompanying probe (sold separately)
have their own individual calibration reports. Overall
system error can be calculated from the individual errors,
rendering the added cost of system data unnecessary.
However, for those requiring it, system data is available at
two or more temperatures of your choice. (See Calibration
Model 1929-X ) |
