O2 is an important parameter to measure and control in kilns and furnaces. The diagram below shows the Tiger 320 Series DI-50 controller connected to a Zirconia O2 sensor with a built-in thermocouple.
The controller calculates the O2 level from the temperature and mV level of the sensor. The result is then displayed on the controller.
Wet and dry bulb humidity measurement, using two temperature sensor probes, is perhaps the most reliable method of accurately calculating humidity for low temperature applications in industry today. Both sensors are mounted close together, with one designated the dry bulb sensor and the other the wet bulb sensor. The wet bulb is kept wet using a moistened cotton wick.
The wet bulb is cooled relative to the dry bulb by heat loss due to moisture evaporation from the wet bulb wick. The rate of evaporation is dependent on the ambient temperature and humidity.
Frostmate is an integrated frost risk management system that reduces the risk of frost damage to an orchardist's crop. A sophisticated control and monitoring system constantly monitors the orchard environment combining both temperature and humidity to deliver a reliable prediction of frost conditions. When frost damage is imminent, the Frostmate automatically initiates the timely delivery of water spray to the area at risk, raising the humidity level. Water delivery is maintained in a continuous cycle to the affected zones until the frost conditions have abated, ensuring better crop protection and conserving resources such as water and power.
Our customer has a feed roller system. They require to monitor and maintain a constant pressure between the two ends of the bottom roller to maintain a straight feed.
The bearings at each end of the bottom roller are mounted on a separate load cell. The output from each load cell is connected directly into a Tiger 320 Series controller.
Our customer requires varying amounts of primary and secondary chemicals to be mixed by ratio. To improve mixing, accuracy and save time, the ratio calculation is automatically performed by a macro.
A container is placed on a weighing platform and the platform is tared to 0. The primary product is poured into the container. The operator enters the required mix ratio and presses the start button.
Our customer operates a gas dispenser that fills gas cylinders of unknown volume and calculates the cost in dollars.
The meter automates the control process through a macro. In the diagram below, both valves 1 and 2 are CLOSED at the beginning of the process (the default position). When the hose connects to the gas cylinder, the safety switch triggers the macro. Valve 1 OPENS, pressurizing the small reference cylinder of known capacity, and the meter stores the pressure data measured from the pressure transducer.
**Avoid costly motor and speed controllers for filling applications by using precise digital setpoint tracking.**
The combination of a DI-60A programmable meter controller fitted with a smart load cell input module does just this, delivering accurate and reliable digital process control.
The container is placed under the tank outlet. The start button is pressed, the display is reset to zero (Tared), the valve opens and the motor starts running until setpoint 1 is reached. The motor switches off and before the motor and pump stop completely (due to the motor inertia), the fill weight is reached and setpoint 2 is then deactivated at the fill weight and the valve closes.
A bakery customer has two tanks containing a release agent that is sprayed into the baking trays. If the release agent runs out, the bread sticks to the trays. Two release agent drums, TANK 1 and TANK 2 are placed onto two independent load-cell platforms and both load cell outputs are connected to a dual load-cell input module installed in a DI-60AT controller.
1. On start up, TANK 1 valve is open.
2. When TANK 1 low level (set-point 1) operates, TANK 1 valve closes and TANK 2 valve opens.
3. The system is now operating from TANK 2.
4. TANK 1 is replaced, TANK 1 low level alarm is now OFF.
5. When TANK 2 low level alarm operates, TANK 2 valve is closed and TANK 1 valve is opened.
6. The sequence is repeated.
Bubbler systems are ideal for level measurement of open channel run off systems or duct and tank situations where debris, foam, steam, or surface turbulance makes standard methods of level measurement impractical.
Outdoor growers in intermittent or low rainfall areas require irrigation controllers. The controller input is usually from a tipping bucket rain gauge or a flow sensor.
Control requirements: If more than X amount of rain falls within a programmed time, the irrigation cycle is interrupted. If Y amount more rain falls within the programmed Off-time, the irrigation cycle is interrupted for a longer time.
Our customer requires water balance studies of water resource allocation for crop management to maximize crop yeild and reduce irrigation costs. A weather station with a Tiger 320 Series controller is set up in a vineyard to measure solar radiation, wind speed, rainfall, and air temperature. A macro installed in the meter and generated by the Texmate Development Software program calculates daily evapotranspiration.
Our customer requires the amount of resin and roving used during their manufacturing operation to be calculated, monitored, and recorded on a job-by-job basis, providing them with accurate costing and stock information.
Texmate installed a Tiger 320 Series controller and connected it to the resin feedline flow transducer and the roving weighing platform pressure transducer.
Our customer supplies hot water from a heat exchanger to other users and charges them for kilowatt hours (kW.h) used. The customer supplied calculation to compile the macro was:
The difference between water temperature out and water temperature returned x a factor x flow in liters per second.
For flow rate in liters/min
-> kW - Flowrate (1/m) / 60 x dT (C) x 4.190
-> kW - Flowrate (1/m) x dT (C) x 0.06983333
Our client has multiple customers on a DC power supply system and needs to know the watt hours (W.hr) or kilowatt hours (kW.hr) used by each customer. Texmate installed a Tiger 320 Series DI-50E meter to measure the DC volts from the power supply on Channel 1 and the DC amps from a DC shunt on Channel 2. The meter records the result of Channel 1 x Channel 2 as W.hr or kW.hr and continually displays this on the operational display.
It is no longer necessary to use combinations of transducers to achieve a power measurement and control system.
A Texmate Tiger 320 Series DI-503 meter, installed with a single-phase power input module, calculates and displays volts, amps, Hz, watts, watt hours, and power factor from a single-phase 2 or 3-wire voltage and current input.
Demand and peak demand are important measurements for large consumers of electricity. This is because the price utilities charge for electricity is related to the peak usage of the consumer over the billing period.
The **Electronic Demand Meter** from Texmate is ideal as a submetering system that can measure and track demand and peak demand in different parts of the factory. This information can then be used to manage the overall peak demand strategy of the factory.
If the real-time clock option is installed in the **electronic demand meter**, the meter can log or print the time the peak demand occured.
The 6 setpoints can be used for load switching or alarms.
If an IWO2 watt input module is installed, the amps, volts, frequency kW, and kWh power factor readings can be viewed by using the UP and DOWN buttons.
In many industrial applications it is necessary to be able to control a device manually. Often a potentiometer or rotary switch is used, but this method can be too coarse and not easily repeatable. Texmate have developed a versatile and easy-to-use selection of manual stations, using their Tiger 320 Series controller, that produce an accurate, digitally controlled and scaled 4 to 20 mA or 0 to 10 V output.
For quality control, our customer requires to measure the resistance of hot copper coil windings. Texmate installed a Tiger 320 Series DI-50E meter. A constant current is passed through the coil and the resistance calculated. To compensate for temperature variation the infrared sensor monitors the coil temperature.
Our customer operates a fruit packhouse. His customers deliver their fruit in large bins for grading, packing and distribution.
The full bins are loaded onto a conveyer and then transferred to a load cell weighing platform.
The bin raises to a weigh position and then stops. After a 1 second delay (load cell to stabilize) the full bin is weighed. The bin then raises and tips the produce onto a second grading conveyer. The bin then returns to the load cell weigh position and stops. After a 1 second delay the empty bin is weighed.