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The PIECAL 525Plus combines the functionality of aThermocouple Calibrator and an RTD Calibrator plus a Milliamp Loop Calibrator into one compact instrument.. The 525Plus also has advanced diagnostics including the unique ability to check the health of a thermocouple sensor by simultaneously displaying the resistance of the sensor and wiring while measuring the temperature being sensed by the thermocouple element. This calibrator can power up a temperature transmitter while simulating the thermocouple or RTD sensor input. Plus it has PIE’s patented Leak Detection to troubleshoot loop wiring problems.
The PIECAL 525+ is a great tool for trouble shooting loop problems with ground faults or leakage currents. Source of measure 14common thermocouple types or test 2, 3 or 4 wire RTD sensors (12 types). Resolution is up to 0.01 Degrees. The 525plus can power most any transmitters and works with pulse current type transmitters. The system accuracy allows the testing of field devices used in AMS 2750 surveys.
| General | |
| Operating Temperature Range | -25 to 60 °C (-10 to 140 °F) |
| Storage Temp. Range | -30 to 60 °C (-22 to 140 °F) |
| Relative Humidity Range | 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing |
| 10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing | |
| Temperature Drift | ± 0.01% of span outside of 23°C ±10 °C (73°C ±18 °F) |
| Size | 5.63 x 3.00 x 1.60 in, 143 x 76 x 41 mm (L x W x H) |
| Weight | 12.1 ounces, 0.34 kg (including boot & batteries) |
| Batteries | Four “AA” Alkaline 1.5V (LR6) |
| Battery Life (Typical) | 25 Hours Thermocouple or RTD, 8 Hours milliamp |
| Isolation: Voltage | 60V rms between all milliamp functions/Read V DC and Source V DC/Thermocouple/Ohms/RTD |
| Normal Mode Rejection | 50/60 Hz, 50 dB |
| Common Mode Rejection | 50/60 Hz, 120 dB |
| Optional NiMh Rechargeable battery kit | Charger, four NiMh batteries [Part # 020-0103] |
| Low Battery | Low battery indication with nominal 1 hour of operation left |
| Protection against misconnection | Over-voltage protection to 60 V dc (rated for 30 seconds) |
| Display | High contrast graphic liquid crystal display. LED backlighting for use in low lit areas. |
| Read mA | |
| Ranges and Resolution | 0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA |
| Accuracy | ≤ ± (0.02 % of Reading + 0.003 mA) |
| Voltage burden | ≤ 2V at 24 mA |
| Overload/Current limit protection | 25 mA nominal |
| Source mA / Power & Measure Two Wire Transmitters & PWRM LEAK | |
| Ranges and Resolution | 0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA |
| Accuracy | ≤ ± (0.02 % of Reading + 0.003 mA) |
| Loop compliance voltage | ≥ 24 DCV @ 20.00mA |
| Loop drive capability | 1200 Ω at 20 mA 950 Ω with Hart Resistor or leak detection running |
| mA 2-Wire Transmitter Simulation | |
| Accuracy | Same as Source/Power & Measure |
| Voltage burden | ≤ 2V at 20 mA |
| Overload/Current limit protection | 24 mA nominal |
| Loop voltage limits | 2 to 60 VDC (fuse-less protected from reverse polarity connections) |
| Source Thermocouple | |
| Accuracy | ±(0.008% of Reading + 0.006 mV) |
| Cold Junction Compensation | ± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11 years |
| Millivolt Range | -13.000 to 80.000 mV |
| Output Impedance | < 0.3 Ohms |
| Source Current | > 20 mA (drives 80 mV into 10 Ohms) |
| Noise | ≤ 4 microvolts p-p for frequencies of 10 Hz or below |
| Read Thermocouple | |
| Accuracy | ±(0.008% of Reading + 0.006 mV) |
| Cold Junction Compensation | ± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11 years |
| Millivolt Range | -13.000 to 80.000 mV |
| Input Impedance | > 10 Megohms |
| Open Thermocouple Threshold Pulse | 18,000 Ohms nominal < 10 microamp pulse for 400 milliseconds |
| Source Ohms & RTD | |
| 3 & 4 Wire Accuracy From 1 to 10.2 mA External Excitation Current Below 1 mA of External Excitation Current 2 Wire Accuracy* | ±(0.015% of Reading + 0.05 Ohms) ±(0.015% of Rdg + 0.025 mV + 0.05 Ohms) 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 | 0 to 400 Ohm: 10.2 mA max; steady or pulsed/intermittent 401 to 4000 Ohms: 1 mA max; steady or pulsed/intermittent |
| Pulsed Excitation Current Compatibility | DC to 0.01 second pulse width |
| Read Ohms & RTD | |
| 3 Wire & 4 Wire Accuracy 2 Wire Accuracy* | ±(0.015% of Reading + 0.05 Ohms) ±(0.015% of Reading + 0.15 Ohms) |
| Resistance Ranges | Same as Source Ohms & RTD |
| Excitation Current | 0.9 mA to 401 Ohms, 0.4 mA to 4010 Ohms (nominal) |
* 2 Wire specifications do not include resistance of the lead wires
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