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The PRESYS T-25N dry block calibrator controls temperature of an insert in order to calibrate thermocouples, thermoresistances, glass thermometers, thermoswitches etc. Besides providing high accuracy temperature values, it also allows the measurement of signals generated by thermo-elements like thermocouples, thermoresistances and thermos- witches, which are being calibrated.
This is possible due to an embedded calibrator specific for these types of signal, including 4-20 mA. Thus, it incorporates the functions of dry block, standard thermometer and calibrator for RTD, TC and also mA. The calibrator also includes an external probe input to allow the temperature control from a standard PRT sensor (optional) placed in the insert together with the sensors to be calibrated. The sensor calibration curve is configured according to the Callendar-Van Dusen parametrization.
PRESYS T-25N Features:
- The T-25N calibrator model generates temperatures from -25 ºC to 125 ºC (-13 ºF to 257 ºF).
- Presents input for thermocouples, thermoresistances, thermoswitches. Besides generating temperature, it measures the signal from the sensor being
- Allows the control of the dry block temperature by using an external probe (optional). The temperature calculation uses Callendar-Van Dusen
- Makes no use of external standard
- Carries out completely automatic calibrations with or without the use of a
- Accuracy to 0.1 ºC, stability of 0.02 ºC and resolution of 0.01 ºC.
- Documenting capabilities: communication with computer and the ISOPLAN-5 Calibration
- Portable, compact, provides interchangeable inserts and carrying
It presents a wide variety of programming resources, allowing the performance of automatic calibrations of thermocouples, thermoresistances, thermoswitches. In this case, the sensor is placed in the insert and its electrical terminals are connected to the embedded calibrator. The operator defines the calibration points and the number of repetitions, then the process is started and all the sequence is automatically accomplished.
Another way of performing automatic documented calibrations is by means of ISOPLAN® calibration software for PC/WindowsTM which uses the RS-232 serial port to connect PC to the dry block. With ISOPLAN® it is possible to register sensors and instruments of the factory, generate work orders, create and print calibration certificates and reports, i.e., it brings all the advantages of computer data management to the calibration environment.
PRESYS T-25N has many other features, such as:
The electric signal calibrator is independent from the dry block function.
Internal buzzer beeps when the temperature reaches the desired value.
Keypad that eases the operation and configuration of the calibrator.
Graphic liquid crystal display to present big-size digit numbers.
Thermo-element reading scaled to ITS-90 or IPTS-68.
Internal regulated 24 vdc power supply for 2-wire transmitters.
Internal rechargeable battery and battery charger included in the electric signal
calibrator.
Independent circuitry for over-temperature protection and safety.
Insert to choose, carrying case, strap and test leads included. If the insert is not
specified, it will be provided the insert type IN01.
Cup like insert with 3/4” hole (hole does not reach the bottom) together with a set of
tiny balls made of steel used for fulfillment included.
Similar to and an alternative to the Fluke 9103 Field Dry Well Calibrator or Dry Block Calibrator.
PRESYS TE-25N Dry Block Calibrator General Specifications:
| Operating Range | -25 ºC to +125 ºC (-13 ºF to 257 ºF) (1) |
| Power Supply | 110VAC or 220VAC 50/60Hz, according to order code. |
| Well Depth | 124 mm |
| Resolution | 0.01 ºC (0.01 ºF) |
| Accuracy internal reference | ± 0.1ºC |
| with external probe | ± 0.07ºC |
| with external thermometer | ± 0.05ºC |
| Stability | 0.02 ºC (0.04 ºF) |
| (after 10 minutes) | |
| Power Consumption | 200W (rated) |
| Heating Rate | 5 minutes (25 ºC to 125 ºC) |
| Cooling Rate | 10 minutes (125 ºC to 0 ºC) |
| Dimensions (H,W,D) | 250 x 180 x 270mm |
| Weight | 9.0 kg |
| Warranty | 1 year, except for rechargeable battery & elements of Peltier effect |
- Ambient Temperature: 20ºC.
Please Note: Achieving a temperature of -25 ºC with this calibrator depends on laboratory temperature and humidity conditions where the calibrations are performed. In general, it is possible to reach it for room temperature of 20 ºC and relative humidity less than 60%.
PRESYS TE-25N Dry Block Calibrator Technical Specifications:
| Input Ranges | Resolution | Accuracy | Remarks |
| millivolt -150 to 150mV -500 to -150mV 150 to 2450mV | 0.001mV 0.01mV 0.01mV | ± 0.01% FS ± 0.02% FS ± 0.02% FS | R input > 10M W auto-ranging |
| mA -5 to 24.5mA | 0.0001 mA | ± 0.02% FS | R input < 160 W |
| Resistance 0 to 2500 W | 0.01 W | ± 0.008% FS | excitation current 0.9mA |
| Pt-100 -200 to 850 ºC | 0.01 ºC | ± 0.1 ºC | IEC-60751 |
| Pt-1000 -200 to 400 ºC | 0.1 ºC | ± 0.1 ºC | IEC-60751 |
| Cu-10 -200 to 260 ºC | 0.1 ºC | ± 2.0 ºC | Minco 16-9 |
| Ni-100 -60 to 250 ºC | 0.1 ºC | ± 0.2 ºC | DIN-43760 |
| TC-J -210 to 1200 ºC | 0.1 ºC | ± 0.2 ºC | IEC-60584 |
| TC-K -270 to -150 ºC -150 to 1370 ºC | 0.1 ºC 0.1 ºC | ± 0.5 ºC ± 0.2 ºC | IEC-60584 |
| TC-T -260 to -200 ºC -200 to -75 ºC -75 to 400 ºC | 0.1 ºC 0.1 ºC 0.1 ºC | ± 0.6 ºC ± 0.4 ºC ± 0.2 ºC | IEC-60584 |
| TC-E -270 to -150 ºC -150 to 1000 ºC | 0.1 ºC 0.1 ºC | ± 0.3 ºC ± 0.1 ºC | IEC-60584
|
| TC-N -260 to -200 ºC -200 to -20 ºC -20 to 1300 ºC | 0.1 ºC 0.1 ºC 0.1 ºC | ± 1.0 ºC ± 0.4 ºC ± 0.2 ºC | IEC-60584 |
| TC-L -200 to 900 ºC | 0.1 ºC | ± 0.2 ºC | DIN-43710 |
