Standards Lab RTD Simulators

Standards Lab RTD Simulators Models 5123—5126

Lab-quality RTD simulation

Accuracy from ±0.02% to ±0.005%

Gold-plated, low-resistance contacts

0.001-ohm resolution

Specifications
Resistance Range	5123: 100W to 11,111W 5124: 10W to 1,111W 5125: 10W to 1,111W 5126: 20W to 1,121W
Resolution	5123: 0.01W 5124: 0.001W 5125: 0.001W 5126: 0.01W
Absolute Accuracy	5123: ±0.005% 5124: ±0.01% 5125: ±0.005% 5126: ±0.02%
Maximum Current	10W to 99.9W, 75 mA; above 100W, 25 mA (5126: 20W to 99.99W,50 mA; above 100W,15 mA)
Number of Decades	Six (5126: five)
Switch Life Rating	> 100,000 (5126: > 50,000)
Resistor Temp. Coefficient	3 ppm/°C typical, 5 ppm max.
Resistor Stability	±10 ppm/24 hours, ±35 ppm/1 year
Maximum Power	100 mW
Breakdown Voltage	750 VRMS
Operating Temperature	–55°C to 75°C
Dimensions	4" H x 17" W x 3.12" D; 102 x 432 x 79 mm (5126: 3" H x 5" W x 4" D; 76 x 127 x 102 mm)

Okay, RTD simulators aren’t very pretty and not much has changed about them over the last 100 years or so, but that’s good because our customers really love these little boxes and nothing beats their accuracy.

The Model 5125 has the best combination of accuracy, ±0.005%, and resolution, 0.001 ohms. These are designed with “no adder accuracy,” and the range is 10 to 1,111.11 ohms.

The Model 5124 has a lower accuracy, ±0.01%, with the same resolution and range as the Model 5125 but with a lower price.

The Model 5123 is designed for use with 1000-ohm platinum RTDs. It has the same accuracy as the Model 5125 but with a resolution of 0.01 ohms and a range to 11,111 ohms.

The Model 5126 has an accuracy of ±0.02%, a resolution of 0.01 ohms, and a range of 20 to 1,121 ohms. It’s easy to use and, because of its smaller size, makes a great field calibration tool.

While General Resistance does not put any bells or whistles on these boxes, there’s no need to calculate or compensate for the error contribution due to contact resistance or “0” resistance because there is no “0” resistance. The Waidner-Wolf shunt design reduces these errors to a level of insignificance. These instruments are about absolute accuracy when only maximum accuracy will do.

Calibrate your lab or field RTD meters with one of our RTD simulators. You won’t find a more accurate resistance simulator that’s this easy to use.