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Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
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Practical Instrument Electronics (PIE)

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PIE Multifunction Calibrators


The rugged PIECAL 820 combines the functions of RTD, thermocouple, process voltage & loop calibrators in one handheld instrument. It will also source and measure resistance to 4kohms and frequency to 20kHz. Continuity check and DC voltage measurements aid system troubleshooting. The intuitive EZ-DIAL Double Click Menu makes it simple to setup. Icons on the display indicate where to plug in the test leads. Store any three output settings for instant recall with the EZ Check switch. Choose between 2, 3, 5 & 11 steps to automatically increment the output in 100%, 50%, 25% or 10% of span. Select RAMP to smoothly increase and decrease the output between Zero and Span. Set a step/ramp time of 5-60sec to match the ...


PIE Process Calibrators

PIECAL 334 & 334 Plus - Loop Calibrators
• Source to 24mA, Read to 52mA
• Measure to ±99.99V DC
• Quickly Simulate 2-wire Transmitters
• Dial Knob for Easy Adjustment
• Large Backlit Display
• Tilt Stand & Protective Rubber Boot

PIECAL 134 - Milliamp Calibrator
• Source and Read 0-24mA
• Simulate 2-wire Transmitters
• Bargraph Display 0-100%
• Hi/Lo Power Modes

PIECAL 235 - Voltage Calibrator
• Source to 20V, Measure to 60V DC
• Power Loops up to 24V & 1000Ω
• Check Live mA Loops
• Store 3 Output ...


PIE Temperature Calibrators

PIECAL models 211 & 311 RTD Calibrators
PIECAL RTD Calibrators handle 9 RTD types. Calibrate directly in temperature (°C/°F) or use like a decade box to 410.00 or 2001.0 ohms. Connect a 2, 3 or 4 wire RTD and the calibrator automatically detects the configuration and measures the RTD.

PIECAL models 322, 422 & 422plus
Simulate and measure the most popular thermocouple types with 14 different types. Each model accepts miniature thermocouple connectors and direct thermocouple wires.