Product Overview: PIECAL 434 Evolution Line Milliamp loop diagnostic calibrator
PIECAL 434 High Accuracy Milliamp Loop Diagnostic Calibrator
| Do More with the Evolutionary PIECAL 434! | ||||
| • | Calibrate Milliamp Instruments Source 0.000 to 24.000 mA & -25.00 to 125.00% of 4-20 mA Read 0.000 to 24.000 mA & -25.00 to 125.00% of 4-20 mA Read -99.99 to 99.99 V Simulate 2-Wire Transmitter, Power & Read Transmitters Menu Selectable 250 Ohm resistor for HART compatibility |
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| • | Calibrate with Lab Accuracy Accurate to ±(0.01% of Reading + 0.002 mA) PIECAL 434 is more accurate than similar calibrators – within ±0.004 mA at 20 mA output! |
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| • | Easty-to-Read Backlit Display | |||
| • | Locate Loop Current Leakages Automatic indication of Loop Current and Leakage Current. Measure ground current leakage from faulty wiring, flooded conduit and corrosion bridges. Leakage typically appears as a Zero Shift and helps you decide if the transmitter needs calibration or if there is a problem in the loop wiring. |
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| • | Faster Calibrations Three output EZ-CHECK switch 2 speed EZ-DIAL Stepping & Ramping |
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| • | Includes Rubber Boot & Test Leads | |||
| • | Optional Accessories AC Adaptor 120 V (020-0101); 240 V (020-0100) NiMh Batteries & Charger 120 VAC/12V DC (020-0103) |
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| Ground Leak Detection | |||||||||
| Have you ever replace a ‘faulty’ transmitter only to find the problem was somewhere else in the loop? And did you end up throwing the transmitter away after you fixed the other problem ‘just in case’ the transmitter was faulty?
If you find a loop where the transmitter is calibrated correctly but all the readings elsewhere in the loop have a fixed offset, this is due to Zero Shift. This zero shift is typically caused by some current in the loop bypassing the transmitter. This might be caused by ground faults, moisture or corrosion. If you have some loops that are erratic after it rains, there may be moisture present in a junction box where insulation has broken down. Turn on Ground Leak Detection and use the PIECAL 434 to power up the loop. Any current that isn’t controlled by the transmitter or other current control element will be indicated as leakage on the PIECAL 434 display. The PIECAL 434 powers up the 2-Wire transmitter or loop and indicates the total current and the uncontrolled current. This provides information useful in troubleshooting loop errors. |
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| Typical Error Conditions | |||||||||
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| The PIECAL 434 is supplying the loop voltage. A calibrated transmitter is limiting the loop current to 12.00mA. An additional 0.51 mA is not controlled by the transmitter and is leading somewhere in the loop. | The PIECAL 434 is supplying the loop voltage. There is a control loop error. This may be a transmitter (set for upscale burnout) with a bad or missing sensor, or a short in the loop. | ||||||||
| Advantages of the PIECAL 434 over the Altek 434 | ||||||||||||
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