Fluke 3125 Specifications

Surface Probe Calibrator

Features

• Calibrates surface sensors up to

400°C

• Uses Hart 2200 Controller for

excellent accuracy and stability

• NIST-traceable calibration

included

Surface probes are difficult to calibrate because it’s hard to find a flat, heated surface that’s stable
and uniform. Hart Scientific’s Model 3125 Surface Dry-Well takes advantage of Hart’s proprietary
2200 Temperature Controller and gives you the best possible conditions for calibrating surface
sensors.

Why buy a non-temperature calibration device designed for test tube sterilization or PC board
repair when you can have a true calibration instrument? The Hart Scientific Model 3125 Surfac e
Dry-Well has a uniform surface temperature and reaches temperatures as high as 40 0°C.

The test surface is milled aluminum for an absolutely smooth and true calibration work area with
maximum thermal conductivity. The 12.25-square-inch test surface is large enough to calibrate
more than one sensor at a time. The Hart Scientific 3125 can be used with a reference surface
sensor or PRT. PRTs (3/16" diameter) may be inserted through a drilled hole into the center of
the block for use as reference thermometers or for easy recalibration of the unit’s display.

With an accuracy of ±0.5 °C to 200 °C and ±1 °C to 400 °C, you can calibrate almost any surface
probe, thermistor, thin film sensor, RTD, thermocouple, ribbon sensor, or surface mount cutouts,
fuses, and switches. Stability is within ±0.3 °C at 400 °C and uniformity within the center three
inches of the surface is ±0.6 °C at 200 °C.

Don’t buy “make-do” hot plates when you can have a legitimate calibration tool.

PO Box 1073, 8 Leroy Road, Williston, VT 05495 USA • fax [phone] • ph 802-863-0085 • toll free 800-235-8367

Ordering Information

3125

Surface Calibrator, (includes detachable Hart Model 2200 Controller)

Specifications

Temperature Range 35 °C to 400 °C

Display Accuracy ±0.5 °C to 200 °C

Stability ±0.2 °C to 300 °C

Resolution 0.01 °
Uniformity ±0.3 °C at 100 °C

Heating Time 25 °C to 400 °C: 22 minutes
Cooling Time 400 °C to 100 °C: 65 minutes
Stabilization Time 8 minutes
Controller Hart Model 2200, microprocessor based, with RS-232
Readout °C or °F, switchable
Sensor
Heater 325-watt, solid-state controlled
Surface Plate 6061 aluminum; top surface machine finished to 0.0008 mm (0.000032 in),

Power 115 VAC (±10 %), 2.8 A or 230 VAC (±10 %), 1.4 A, specify, 50/60 Hz, 325

Weight 3.2 kg (7 lb.) with 2200 Controller
NIST-Traceable

Calibration

(95 °F to 752 °F)

±1.0 °C to 400 °C

±0.3 °C to 400 °C

±0.6 °C at 200 °C
±0.9 °C at 300 °C
±1.4 °C at 400 °C

RTD, 100

96 mm (3.8 in) diameter acc essible

W

Data at 50 °C, 120 °C, 190 °C, 260 °C, 330 °C, and 400 °C

Ω

PO Box 1073, 8 Leroy Road, Williston, VT 05495 USA • fax [phone] • ph 802-863-0085 • toll free 800-235-8367