Loadstar Sensors DS-3000 Digital Load Cell Display & Controller - Manual (Page 28)

DS-3000U DS3000 User Guide
Loadstar Sensors, Inc. Page: 28 / 48 033-01419 Rev. 4
9 DS-3000U S
YSTEM
P
ROGRAMMING
E
XAMPLES
9.1 Tank Fill Controller
A mining concern has a large slurry tank with 4 load-cells mounted on each of it’s four legs. Before rock is
added, a certain amount of water must be initially present in the tank. This is can be easily accomplished
using the PLC like functionality of the DS-3000. An external trigger from the main plant process controller,
triggers the process start and tares the DS3000U, then water is added under control of the DS-3000U output
#1. Once the weight of tank + water exceeds the desired setpoint, the DS-3000 stops the water flow into the
tank.
9.1.1 Application Requirements:
1. 4x sensors each with 10000 Lb load capacity each = 40000 Lb total scale load capacity
2. Typical empty tank “dead” weight, with no water or minerals present: 1200 Lbs.
3. Acceptable tank trigger “filled with water” weight: 3500 lbs.
4. Let Sensor 1 – Sensor 4 correspond to the four load-cells, each corresponds to one DS-3000
module input.
9.1.2 Implementation Details:
1. Connect the “water control valve” to Output #1, so when the relay is active, water flows into the
tank.
2. Connect each of the four load-cells to consecutive inputs on the DS-3000.
3. Connect the process controller start contacts to the “remote” input on the DS-3000.
4. Assume units of pounds (Lbs), make sure the front panel LED is illuminated in the Lbs position.