Application Notes

Defining the Problem: Convert a 4-20mA level signal (proportional to height) to a 4-20mA signal proportional to volume. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply     Download PDF for complete application note.

Pump Up with Overfill Alarm This document illustrates how to use APM765-6R2-10 meters for exciting a 2-wire, 4-20mA continuous level sensor, and provide two relay outputs. One relay is for pump control (filling) and the other relay is for high alarm (overfill) with automatic or manual reset. Learn more about the APM765 Panel Meters here….

Pump Down with Duplex Pump Control This document illustrates how to use APM765-6R2 meters for exciting a 2-wire, 4-20mA continuous level sensor, and provide two relay outputs for duplex pump control with alternation. Learn more about the APM765 Panel Meters here.

Problem: A flow sensor has a non-linear reversed output. Solution: Create a 4-20mA output proportional to flow rate using the following Acromag transmitter and software products: Model: 811T-0500 DC to DC Isolated Transmitter Model: 800C-SIP Software Interface Package Optional: PS5R-D24 Power Supply The 811T offers a 25 break-point table for sensor linearization. Input percentage is…

Defining the Need: Monitor three RTD’s on a stack and transmit two differential 4-20mA signals representing -7 to 18°F. Each RTD transmitter is calibrated -20 to 120°F. Solution: Model 892M-0500 math module (qty. 3) Model 800C-SIP software interface pkg. (qty. 1) Model PS5R-VD24 power supply (qty. 1)   Download PDF for complete application note.

Defining the Need: Calculate the discharge rate Q (g.p.h.) output of a V-notch weir. Provide a 4-20mA output for flowrate and frequency output for totalization and alarm output for high-level alarm. Solution: Model 892M-0500 DC output math module Model 895M-0800 freq. output math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply  …

Defining the Need: Transmitting the dosing percentage (ratio) of an additive based upon total flow of effluent. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply

Defining the Need: Taking the square root and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply

Defining the Need: Scaling and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply