APPLICATION NOTES

AN2301: Split Loops without a Loop Splitter

Use a low-cost single loop 4-20mA isolator to create a second loop.

Products referenced: JH4300C, JH4305, JH5040, JH5050

AN2302: Module Provides “Missing Link”

Marrying a field-upgrade 4/20mA sensor to an old, nonstandard voltage-input “legacy” system.

Products referenced: JH4300, JH5000

AN2303: How to Safely Connect a Powered Transmitter to a PLC’s 2-Wire Loop Input

“Loop Powered Output” (current sinking) option allows a powered transmitter’s output to look like a 2-wire transmitter.

Products referenced: Most JH Technology AC- or DC-powered transmitters.

AN2304: Barriers Safeguard Adjustment in Hazardous Location

Using intrinsic safety barriers to provide safe manual control (potentiometer) in a potentially-explosive area.

Products referenced: JH4003I, JH5800

AN2305: Isolator Eases Calibration of Hard-To-Reach Measurement System

A conveniently-located 4-20mA isolator put the zero and span adjustments within easy reach.

Products referenced: JH4300C, JH4305

AN2306: AC to DC Translation Monitors Shaker Motion

In an oscillating system, an AC input transmitter converts instantaneous position measurement to a DC signal representing peak-to-peak amplitude.

Products referenced: JH5600, JH6010I

AN2307: In-The-Terminal C/J Compensation Maximizes Thermocouple Accuracy

Putting the cold-junction sensor in the connection terminal virtually eliminates compensation errors.

Products referenced: All JH Technology thermocouple transmitters and alarms

AN2308: Thermocouple Alarm Distinguished Between Overtemperature and T/C Failure

When properly set up, one relay announces overtemperature while the other warns of thermocouple failure.

Product referenced: JH1220

AN2309: Signal Isolator Serves as Subtractor

Subtract two voltage signals using a low-cost isolator.

Products referenced: JH4300, JH5000, FT/FDT5000

AN2310: Monitoring Ship’s Throttle Position

Expanded-scale potentiometer transmitter converts throttle position to control voltage in a ship upgrade.

Product referenced: JH4003I

AN2601:  Gas Flow Minisystem