Application Notes
How to Excite a 2-wire, 4-20mA Continuous Level Sensor & Provide 2 Relay Outputs for Pump Down with High Alarm – 8400390
Pump Down with High Alarm This document illustrates how to use the APM765-6R2-10 for exciting a 2-wire, 4-20mA continuous level sensor, and provide two relay outputs. One relay for pump down and one relay for high alarm with automatic or manual reset. Defining the Problem: Need to excite a 2-wire, 4-20mA continuous level sensor, and…
How to Create a 4-20mA Output Proportional to Flow Rate – 8400304
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…
How to Monitor RTDs for Temperature Differential – 8401008
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.
How to Calculate a V-notch Weir Discharge Rate Q (GPH) – 8401009
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 …
How to Transmit the Dosing Percentage of an Additive Based on Total Flow of Effluent – 8401006
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
How to Take the Square Root and Sum up to Four 4-20mA Signals from Flow Sensors – 8401005
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
How to Scale and Sum up to Four 4-20mA Signals from Flow Sensors – 8401004
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
How to Use a Toroidal AC Current Sensor – 8401044
Using Acromag’s Toroidal AC Current Sensor Model 5020-350 Transmitters with DC current input can be used in conjunction with an external toroidal AC current sensor in order to precondition an AC current input signal. This sensor is a highly accurate toroidal instrument transformer; which converts an AC current signal to a safe, low-level, DC milliampere…
How to use Thermocouple Transmitters to Monitor Temperatures in Paint Systems – 8400818
This document illustrates using Acromag’s TT330 Series to monitor high temperatures in an automotive paint curing oven and transmit to the existing PLC 4-20mA input card/software setup. Defining the Problem The area around an auto manufacturer’s paint curing ovens is at elevated temperatures affecting the performance of locally installed instrumentation. Placing Signal Conditioners rated for…
How to Split Gas Detector Outputs for Monitoring & Process Control – 8400861
Defining the Problem: At a remote wastewater pumping station, Methane (CH4) and Hydrogen Sulfide (H2S) are monitored with MSA X5000 Gas Monitors. The 4-20mA outputs must be split to a GasCard XL Controller and Emerson Ovation I/O. The Controller has powered inputs, but the Ovation inputs require an external power source. Typical splitters have two…