RTD and TC Meter and Simulator
Gometrics Instruments offers a new temperature calibrator, more versatile than the previous generation. The T258 meter/generator is a portable instrument with dual function: in addition to being able to accurately read a temperature probe, it is capable of generating resistance or millivolts to simulate Pt100 resistance thermometer type probes or B, E, J, K, N, R, S, and T thermocouples.
It is a robust, easy-to-use tool specially designed for calibrating probes and checking temperature measurement loops.
The simulation function allows you to generate the electronic signal equivalent to the temperature value to be simulated. These operations can be performed either in resistance value (Ohm) or millivolts (mV) or directly in degrees of temperature (°C Celsius or °F Fahrenheit), just by pressing the corresponding key at the start of the job. In simulation, the instrument supports pulsed excitation current.
The T258 is compatible with resistive temperature probes type Pt100 according to IEC 385 and IEC 3926 and thermocouples type B, E, J, K, N, R, S and T according to IEC 584-1. The different sensors can be configured through the keypad.
The instrument is equipped with keys S1 to S6 that allow to store in memory six fixed simulation points in order to generate these points in successive jumps automatically using the AUTO key. The cycle is continuously ascending and descending.
This model incorporates a temperature sensor for cold junction measurement. Its backlit display makes it easy to read in dark environments. In addition, the resolution and accuracy offered by the T258 are excellent, in line with the rest of the instruments in the new Tinycal range.
| Simulation/Generation | |
| Generation range: | -10 to 28 mV // -10 to 80 mV See table. |
| Resolution: | -10 to 19.999 mV (0.001 mV / 0.1 °C 20 to 80 mV (0.01 mV / 0.1 °C). |
| Accuracy at 23° ±3°C: | ±0.025 %FS |
| Uncertainty at 1 year: | ±0.05 %FS |
| Cold junction compensation: | 0 to 50°C / ±0.5°C. |
| Presetting memories: | 6 (S1…S6) |
| Over voltage protection: | ±30 Vdc |
| Temperature coefficient: | ±0,003% / °C |
| Keyboard: | 14 membrane keys |
| Measurement | |
| Resolution: | -10 to 19.999 mV (0.001 mV / 0.1 °C) 20 to 80 mV (0.01 mV / 0.1 °C). |
| Accuracy at 23° ±3 °C: | ±0.025 %FS |
| Uncertainty at 1 year: | ±0.05 %FS |
| Cold junction compensation: | 0 to 50 °C / ±0.5 °C |
| Input impedance: | > 10 MΩ |
| Over voltage protection: | ±30 Vdc |
| Temperature coefficient: | ±0,003 % / °C |
| Simulation | |
| Accuracy at 23° ±3 °C: | Range -200 to 200 °C 0.05 °C Range 200 to 850 °C 0.1 °C |
| Uncertainty at 1 year: | Range -200 to 200 °C 0.2 °C Range 200 to 850 °C 0.4 °C. |
| Sensor current range: | 0.1 to 2 mA |
| Preselection memories: | 6 ([S1]…[S6]) |
| Overvoltage protection: | ±30 Vdc |
| Simulation range: | -200 to 850 °C / 0 to 400 Ω. |
| Resolution: | [0 to ±200 °C] or [0 to 200 Ω] – 0.01 °C / 0.01 Ω [200 to 850 °C] or [200 to 400 Ω] – 0.1 °C / 0.1 Ω. |
| Temperature coefficient: | 0.003 %FS / °C |
| Keyboard: | 14 membrane keys |
| Measurement | Accuracy at 23 °C ±3 °C: Range -200 to 200 °C 0.1 °C Range 200 to 850 °C 0.2 °C (+1 count) |
| Uncertainty at 1 year: | Range -200 to 200 °C 0.2 °C Range 200 to 850 °C 0.4 °C (+1 count). |
| Sensing current: | approx. 1 mA |
| Measuring range: | -200 to 850 °C / 0 to 400 Ω. |
| Resolution: | [0 to ±200 °C] or [0 to 200 Ω] – 0.01 °C / 0.01 Ω [200 to 850 °C] or [200 to 400 Ω] – 0.1 °C / 0.1 Ω. |
| Temperature coefficient: | 0.003 %FS / °C |
| Input impedance: | >10 MΩ FS |
| Display | Type: 10 mm LCD, 4½ digits, 7 segments with blue backlight Maximum display: -19999 a 19999 |
| Microprocessor | The T258 incorporates a microprocessor that controls all instrument functions.
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| Feeding |
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| Physical characteristics | |
| Dimensions: | 83 x 154 x 47 mm |
| Weight: | 341 grams |
| Connections: | 3 terminals for 4 mm Ø banana plugs 1 miniTC female terminal 3.5 mm Ø power supply plug |
| Environmental conditions | |
| Storage temperature: | -10 to 60 °C |
| Operating temperature: | 0 to 50 °C |
| Relative humidity: | 0 to 95 % non-condensing |
Content included
The T258 standard instrument is supplied with the following accessories:
