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Moved to a new enclosure with a rubber boot, Practical Instrument Electronics, PIE, has presented the PIECAL 525B Automated Thermocouple & RTD Calibrator.
The 525B is the innovative replacement for the PIECAL 525 equipped with a tilt stand, rubber boot, backlit display and 4 “AA” batteries. The calibrator has 14 T/C types, increased from the previous 10, and additional RTD types for Platinum 10, 50, 200 & 500 Ohm for the 1.3850 (IEC 751/DIN) curve.
It also features a new efficient secondary display that shows cold junction temperature and millivolts while displaying thermocouple temperature as well as showing ohms while displaying RTD temperature.
The PIECAL 525B can automatically detect when individual wire connections are open of 2, 3 or 4 wire connections. Likewise, proper instrument operation can be verified by measuring the excitation current.
Screw terminal for T/C wire plus miniature T/C socket
Isothermal block with ±0.05°C Cold Junction Sensor
Banana jacks for 2, 3 & 4 wire RTD
General | |
Operating Temperature Range | -20 to 60 °C (-5 to 140 °F) |
Storage Temperature Range | -30 to 60 °C (-22 to 140 °F) |
Temperature effect | ≤ ±25 ppm/°C of Range; Cold Junction Sensor: ≤ ±0.01% °/° from ambient temperature (°C or °F) |
Relative Humidity Range | 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing |
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing | |
Normal Mode Rejection | 50/60 Hz, 50 dB |
Common Mode Rejection | 50/60 Hz, 120 dB |
Size | 5.63 x 3.00 x 1.60 in, 143 x 76 x 41mm (L x W x H) |
Weight | 12.1 ounces, 0.34 kg with boot & batteries |
Batteries | Four “AA” Alkaline 1.5V (LR6) |
Optional NiMh Rechargeable battery kit | 120 VAC for North America Only; charger, four NiMh batteries, AC & DC cords [Part # 020-0103] |
Battery Life | 50 Hours |
Low Battery | Low battery indication with nominal 1 hour of operation left |
Protection against misconnection | Over-voltage protection to 60 vrms (rated for 30 seconds) Red LED indicates OVERLOAD or out of range conditions |
Display | High contrast graphic liquid crystal display. LED backlighting for use in low lit areas. |
Voltage Source | |
Ranges and Resolution | -13.000 to 80.000 mV & -13.0000 to 80.0000 mV |
Accuracy | ±(0.008% of Setting + 0.006 mV) |
Source Current | ≥ 10 mA |
Output Impedance | < 0.3 Ohm |
RMS Noise | ≤ ± 0.0005 mV from 0.1 to 10 Hz |
Short Circuit Duration | Infinite |
Voltage Read | |
Range and Resolution | Same as Voltage Source |
Accuracy | ±(0.008% of Reading + 0.006 mV) |
Input resistance | ≥ 10 MΩ |
Thermocouple Source | |
Accuracy | ±(0.008% of Setting + 0.006 mV) |
Cold Junction Compensation | ± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11 years |
Output Impedance | < 0.3 Ohms |
Source Current | > 10 mA (drives 80 mV into 10 Ohms) |
RMS Noise | ≤ ± 0.0005 mV from 0.1 to 10 Hz |
Thermocouple Read | |
Accuracy | ±(0.008% of Reading + 0.006 mV) |
Cold Junction Compensation | ± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11 years |
Input Impedance | > 10 Megohms |
Open Thermocouple | Threshold: 10,000 Ohms nominal Pulse: < 10 microamp pulse for 300 milliseconds |
RTD and Ohms Source | |
3Wire & 4 Wire Accuracy From 1 to 10.2 mA External Excitation Current
Below 1 mA of External Excitation Current 2Wire Accuracy |
±(0.015% of Setting + 0.05 Ohms)
Add ( 0.025 mV ) Accuracy mA Excitation Current Add 0.1 Ohms to 3 Wire & 4 Wire Accuracy |
Resistance Ranges | 400 Ohm Range: 0.00 to 401.00 & 0.000 to 401.000 4000 Ohm Range: 0.0 to 4010.0 & 0.00 to 4010.00 |
RMS Noise | 400 Ohm Range: ≤ ± 0.005 Ohms from 0.1 to 10 Hz 4000 Ohm Range: ≤ ± 0.05 Ohms from 0.1 to 10 Hz |
Allowable Excitation Current Range | 400 Ohm Range:10.2 mA max; steady or pulsed/intermittent 4000 Ohms Range: 1 mA max; steady or pulsed/intermittent |
Pulsed Excitation Current Compatibility | DC to 0.01 second pulse width |
RTD and Ohms Read | |
Resistance Ranges | Same as RTD and Ohms Source |
Accuracy | ±(0.015% of Reading + 0.05 Ohms) |
Excitation Current | 0.9 mA to 401 Ohms, 0.4 mA to 4010 Ohms (nominal) |
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