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1502A/1504 Thermometer Readouts

Best performance thermometers in their price range

Two Tweeners to choose from—reading PRTs or thermistors

Battery packs available

Best price/performance package

One of Fluke Calibration's best-selling products is the Tweener thermometer,

and there’s a reason. No other company, not one, has a reference thermometer

that comes close to the performance and features of the Tweener for

anywhere near its price.

1502A Tweener PRT Readout

The 1502A Hart Scientific 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 optiona

l 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 subranges 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 subranges 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 Fluke Calibration'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 )

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