PIECAL 334Plus Automated Milliamp Loop Calibrator
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Automated Milliamp Loop Calibrator With the PIECAL 334Plus you can check, calibrate and measure all your current signal instruments in a 4 to 20 milliamp DC loop. It can be used at any access point in your loop. Source & Read 0.000 to 24.000 mA, Simulate a 2 Wire Transmitter or use the PIECAL 334Plus to simultaneously power your 2 Wire Transmitter and measure its output. Turn on backlight & easily see the display in dark areas of the plant. • Troubleshoot loop problems Quickly diagnose ground fault and current leakage with the patented loop diagnostic technology (US Patent# 7,248,058). • Source milliamps Calibrate recorders, digital indicators, stroke valves or any instruments that get their input from a 4 to 20 mA loop. Easily set any value quickly to within 0.001 mA with the adjustable digital potentiometer “DIAL” or use preset 4.000 mA (0.00%) and 20.000 mA (100.00%) EZ-CHECK™ settings. • Automatic output stepping & ramping Press & hold the dial to automatically step from 4 to 20 in 2, 3 or 5 steps or choose a continuous ramp. • Calibrate using loop power Check loop wiring and receivers by using the PIECAL 334Plus in place of a 2 Wire transmitter. Uses any loop power from 2 to 100 V DC. • Read loop current Check controller outputs or measure the milliamp signal anywhere in the loop. The PIECAL 334Plus measures 0.000 to 52.000 mA (-25.00 to 300.00%) signals with greater accuracy than a typical multimeter. • Power & measure 2 wire transmitters Actual Size The PIECAL 334Plus can simultaneously output 24V DC to power any and all devices in a process loop using the internal batteries and internal switching power supply, while measuring the output of a 2 Wire Transmitter and any other loop devices. Powers HART™ transmitters with built-in 250 ohm resistor simplifying hookups with HART communicators. The PIECAL 334Plus can measure from -99.99 to +99.99 VDC with 0.01 Volt resolution. Use it to check loop power supplies, I/V converters, 1 to 5 Volt signals, and other voltages making it unnecessary to carry a multimeter. • Evolutionary design PIECAL Calibrators are designed and built by members of the same team that designed and built the calibrators manufactured by Fluke* under the Altek* label. The PIECAL 334Plus improves upon other brands by including a rubber boot, tilt stand, backlit display with larger digits, rugged switches and a battery compartment for fast battery changes. * PIECAL Calibrators are not manufactured or distributed by Fluke Corp or Altek Industries Inc, manufacturers of Altek Calibrators. Practical Instrument Electronics

Ground Leak Detection Have you ever replaced 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 a 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...

PIECAL 334Plus Specifications (Unless otherwise indicated all specifications are rated from a nominal 23°C, 70% RH for 1 year from calibration) General Source/Power & Measure Two Wire Transmitters Operating Temperature Range Storage Temperature Range Relative Humidity Range ≤ ± ½ Least Significant Digit Temperature effect 10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing Size 12.1 ounces, 0.34 kg (including boot & batteries) Optional NiMh Rechargeable battery kit Loop compliance voltage Loop drive capability - Leak Detection Off 1200 Ω at 20 mA for 15 hours nominal; 950 Ω with Hart Resistor...