How-To
Instrumentation How-To
Instrumentation How-To in industrial control systems — covering 5 topic areas in the CurryControls.com controls and automation knowledge hub.
Written guides in this section
Full references, procedures, and diagnostic guides published under Instrumentation How-To.
How to Calibrate a Pressure Transmitter
A five-point calibration with a pressure source and a reference: isolate and vent, record as-found, decide whether to adjust, trim the sensor and the output separately, verify as-left, and record it so the next calibration means something.
9 min readUpdated Sep 5, 2026
How to Diagnose a Ground Loop
Prove that a noisy or offset analog signal is a ground loop, find the second ground, and fix it the right way: remove the extra ground, isolate the signal, or correct the shield termination. With the measurements that make the diagnosis certain.
9 min readUpdated Sep 5, 2026
How to Configure a Radar Level Transmitter
Commission a non-contact radar on a wet well or tank: mount it, set the reference and range from measured elevations, map false echoes with the vessel empty, set damping and the output, and verify against a tape at two levels before the controller uses it.
9 min readUpdated Sep 5, 2026
How to Troubleshoot a Flowmeter
Work a flowmeter that reads wrong, reads zero, or reads with the pipe still: confirm the pipe is full and the flow is real, check the installation against the meter requirements, and compare against an independent measurement before adjusting anything.
9 min readUpdated Sep 5, 2026
How to Test a 4-20 mA Loop
Prove a current loop end to end with a meter and a calibrator, without interrupting a process you were not authorized to interrupt.
8 min readUpdated Aug 6, 2026
Topics in this area
Calibrate a Pressure Transmitter
Calibrate a Pressure Transmitter — practical reference notes for controls engineers, integrators, and technicians working with instrumentation how-to.
Test a 4-20 mA Loop
Prove a loop end to end with a meter and a calibrator, without lifting the wrong wire.
Diagnose Ground Loops
Diagnose Ground Loops — practical reference notes for controls engineers, integrators, and technicians working with instrumentation how-to.
Configure Radar Level
Configure Radar Level — practical reference notes for controls engineers, integrators, and technicians working with instrumentation how-to.
Troubleshoot a Flowmeter
Troubleshoot a Flowmeter — practical reference notes for controls engineers, integrators, and technicians working with instrumentation how-to.
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