All Applications

Our customer has a large log saw with a log feed motor and requires to optimize efficiency of the cutting operation. The log feed motor speed is controlled by the 4-20 mA output scaled from the saw blade motor current. As the saw motor load increases above 90% load, the log feed motor slows. If the load increases above 120%, the feed motor stops. If the load increases to 150%, the saw motor stops. The motor load is represented on the tri-color bargraph. The bargraph scale indicates 1% steps in motor current, and changes from green to orange at 90% load and orange to red at 120% load. The digital display indicates saw motor amps.

Our customer operates an automatic cut-to-length guillotine. A Texmate 320 Series programmable meter controller has been installed and programmed to measure length from an encoder input. Setpoint 1 is programmed to operate at the required cut-off length. A clutch and a clamp operate to stop the metal feed motor. After a programmed OFF-time, (to enable the guillotine to complete its cut cycle) the displayed length is reset to 0. The clamp releases, the clutch engages, and the metal commences feeding, repeating the process. At each cut-off, 1 is added to a totalizer. (Viewed by pressing the UP button.)

The Texmate 320 Series bargraph controller samples at 50 times/second for this application. The press operates at 60 strokes/minute. The load cell output is rapidly changing up and down during each stroke of the press. The operator requires the display to be held at peak value for as long as practical. The peak display value is reset on the rising load cell signal during each press stroke. This locks the bargraph and digital display at the peak value for 0.5 seconds making the displayed values legible as required. From the digital display the overload trip setpoint is accurately adjusted. The texmate 320 Series fits to the press at 30% of the cost of a replacement control board for the original control system.

With the mounting pressure to clean up the atmosphere, many local authorities are now legislating the maximum density of smoke released into the atmosphere from chimneys. They now require chimney output opacity (smoke density) and temperature to be monitored, averaged and recorded at one minute intervals with a date and time stamp. Texmate installed a I-series 320 Series DI-502T controller displaying the averaged opacity and minimum temperature readings. The controller can be programmed to either data log these readings every minute, or download them directly to a serial printer. After each download, the controller resets the readings for the next calculation and download.

O2 is an important parameter to measure and control in kilns and furnaces. The diagram below shows the I-series 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. The I-series provides a reliable, cost-effective solution, enabling even very small boilers to be upgraded to reduce pollution and save on fuel costs.

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. From a polynomial formula entered into the controller, relative humidity (RH) is calculated from the dry and wet bulb temperatures. A I-series 320 Series controller, with a dual RTD or thermocouple input module and our relative humidity macro installed, allows you to directly display RH and temperature. This data can be used to control the temperature and humidity applications in horticulture, livestock, food processing, environmental, timber drying, and many other industries.

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. Frostmate is the only frost protection system that combines environmental monitoring with automatic irrigation control. This allows the orchardist to sleep easy during potential crop damage conditions. But, for orchardists who want to be kept aware of current conditions, the Frostmate can alert them to potential crop damage conditions via text message to a mobile phone over the GPRS network. How it Works. The system consists of two boxed units. The field unit contains a temperature and relative humidity probe connected to a I-series 320 Series controller and is based in the orchard. Both temperature and humidity are displayed at the same time on the dual display. Annunciators display the frost risk in six levels ranging from low to high. The base unit contains a I-series 380 Series controller directly connected to a GPRS modem via RS-232 and is based in the packing shed or some other control area. 24 V AC power is supplied to the base unit controller from a transformer. The base unit controller then supplies 24 V AC power to the field unit controller and powers the GPRS modem with 24 V DC. The combination of temperature and relative humidity input is displayed on the field unit controller and transferred via RS-485 to the base unit controller where it is also displayed. Once the humidity compensated temperature alarm is reached, setpoint SP2 starts the sprinkler pump in the orchard. Sprinkler valves, are then pulsed ON at a defined rate in a zoned sequence until the frost danger has passed.

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 I-series 320 Series controller. The controller displays the difference in pressure between load cell 1 and load cell 2. If load cell 1 is lower than load cell 2, the controller displays the negative difference. If load cell 1 is higher than load cell 2, the controller displays the positive difference. If both pressures are equal, the controller displays 0.

Our customer manufactures machines for loading produce into bags at preset weights. A conveyor carries the produce to the bag. The conveyor speed controller slows the conveyor when the bag nears the required weight. The bag is hung from a load cell which feeds the weight to the I-series 320 meter controller. When the bag is near the required weight, a setpoint in the meter slows the conveyor. When the bag reaches the required weight, the meter automatically compensates for produce inertia and determines when to stop the conveyor and close the conveyor feed gate. The display flashes between "BAGFUL" and "WEIGHT". The operator unclamps the bag, and the meter counts and totalizes the bag number from the bag clamp microswitch pulse. The operator fits a new bag and the clamp closes after a 1 second delay to stabalize the load cell. The operator tares the load cell input to 0, cancelling the empty bag weight. The fill cycle restarts. All program functions not used are blanked out and the setpoints are titled for ease of operation. Note: This customer was originally using a panel meter, a PLC and a motor drive for this application. Using Texmate's I-series 320 Series controller, a PLC is no longer required saving both cost and time in manufacturing.

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. A setpoint starts the secondary chemical blend pump. When the secondary product is close to the calculated mix weight ratio, the setpoint pulses the blend pump motor until the calculated weight is reached. The pump stops and is latched OFF. The display flashes to indicate the process is complete.

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. Valve 1 then CLOSES and valve 2 OPENS. The meter measures the pressure difference. The fill capacity is then calculated in liters by the meter from a calculation provided by the customer. Valve 1 then OPENS, filling the system and the meter calculates the cost of the fill amount in dollars. Valves 1 and 2 CLOSE and the hose is disconnected.

Our customer has a tank supported on a load cell and requires to dispense measured amounts of product from the tank. Texmate installed a I-series 320 Series DI-50E meter calibrated to indicate the product weight in the appropriate engineering units. The meter is installed with two remote push-button switches configured as TARE and TARE CLEAR. All non-application codes are blanked out. Relay 1 is connected to the tank outlet valve. The amount of product required is programmed into the meter at setpoint 1. Setpoint 1 is programmed with initial startup inhibit and relay latch OFF. (See Setpoints & Relays Supplement (NZ201) for full details.) When the TARE button is pressed: Note: The product weight reduces during dispensing, therefore the setpoint value is negative for the product taken. Up to six relays are available for batch control operations. A front panel button can be programmed to display the weight of the tank and product in pounds or kilograms. With the serial output module installed, the meter can be setup to print the dispensed product amount.

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. The filled container is removed. A new container is placed under the outlet. The start button is pressed and the fill process is repeated. Options: Text messaging for intuitive identification of setpoint and operator instructions. Second input for container positioning sensor for automation applications.Totalize total liters dispensed. Switch off at preprogrammed total. Print out to serial printer: Date / Time and liters dispensed for customer receipt applications.

Paddlewheel and turbine flow sensors are similar in operation as they rely on the energy in the flow stream to spin the rotor. The spinning rotor generates either a sinusoidal or square wave output. Most paddlewheel and turbine flow sensors use rotors with magnets embedded in each blade. The magnets are used together with a coil to produce the sinusoidal output (Hall effect sensors), or trigger an electronic switch to produce a square wave output (NPN or PNP transister output sensors). The resultant frequency is directly proportional to the flow rate.

This application covers flow rate measurement and flow totalizing using the I-series 320 Series controller. The system measures flow rate from paddlewheel or turbine sensors and provides totalizing capabilities for tracking cumulative flow volumes.

Bubbler systems are ideal for flow measurement of open channel run off systems or duct situations where debris, foam, steam, or surface turbulence makes standard methods of flow measurement impractical. Most bubbler systems require an independent pressure transmitter, a display, and a control system. Texmate have combined their new differential pressure sensor input module with the I-series 320 Series controller to perform direct pressure measurement as a complete unit. The functionality and versatility of the I-series controller provides flow, and total measurement with complete system control, monitoring and data logging.

A boat builder requires to display the amount of fuel in an irregular shaped tank using a level sensor. As the output from the level sensor is not linear, a bargraph programmable meter controller is installed to linearize the signal. The digital display shows the amount of fuel in liters, while the bargraph display shows this as a percentage of the tank capacity. The actual volume of the tank is calculated for the most nonlinear areas of the tank and these are entered into the meter. Setpoints are programmed to indicate on the bargraph when the tank is 20% and then 10% full. The bargraph display is programmed to display green above 20%, orange below 20%, and red below 10% full.

Our customer has a semi-automated mixing tank and uses a level sensor to detect the tank level. The tank is filled with a primary solution to a reconfigurable percentage of the full tank, controlled by a setpoint. A secondary solution is then added by hand. Texmate installed a I-series 320 Series DI-60AT programmable meter controller (PMC). The controller is calibrated to display the percentage in hundredths of a percent (000.00%). When the pump fills the primary solution to the selected percentage, the setpoint relay stops the pump and the controller scrolls the message PUMP IS NOW OFF. The operator then adds the secondary solution to the tank, and when the level sensor senses the tank is 90.00% full, the meter display scrolls the message TANK IS ABOUT TO OVERFLOW--------TIME TO PANIC. The macro was written and compiled to control the operation of the primary solution pump and the display messages by the setpoint.

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. The controller is programmed to scroll a text message across the display to indicate the tank in use, and when the tank low alarms are energized. For example: TANK LEVEL MACRO The example macro has been written to

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. By combining their new direct differential pressure input module (IGYX/IGYY/IGYZ) with the established versatility and control functionality of their I-series 320 Series controller, Texmate can meet the challenges of level and flow measurement with added system control, monitoring, and data logging.

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. The DI-60A controller with alphanumeric display uses the I-series 320 Series register reset functions to reset timers and relays during setpoint activation and deactivation . Text messaging allows ease of control and setpoint identification while all the control parameters are easily programmable by the operator. Timer reset functions are automatic with optional manual override. A macro can be installed in the controller to further enhance the control functions.

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 I-series 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. The controller monitors and datalogs the environmental conditions, makes management decisions based on calculated daily evapotranspiration figures produced by the controller, and optimizes the costly application of water to the plants.

Our customer manufactures machines for applying labels to cans. They require a controller to control the temperature of the glue and glue roller. The controller also needs to control the length of time the feed mechanism operates to feed the label over the glue roller and spin the can to apply the label. Texmate installed a I-series 320 Series DI-503 3-display programmable meter controller (PMC). Two thermocouple inputs control the temperature of the glue and the glue roller and inhibit the machine so that it will not operate unless the glue temperature is within set limits. A timer controls the clutch, which controls the label feed and can spin time. The timer is configured for 0.001 seconds resolution and is easily adjustable by the operator. A can is placed onto the machine. After 300 milliseconds the clutch operates the label feed, the can spins for 1 revolution, and then the clutch disengages and stops the can with the label attached. Clutch operating time is displayed on the primary display and glue temperature is displayed on the 2nd display. The clutch control relay operates a can counter and is displayed on the 3rd display.

The melt pressure of a plastic extruding or moulding process is an important parameter to measure and control. However, to obtain a reliable reading of the melt pressure requires the pressure transducer to be calibrated at the melt temperature of the plastic. For moulding machines that are used with more than one type of plastic, calibration must be performed for each type. The I-series 320 Series programmable meter controller facilitates frequent calibration by using ON-DEMAND 2-point calibration. By simply pressing the program button for 4 seconds, the calibration ratings are entered. Not only that, but the I-series automatically makes use of the shunt resistor that is built into the melt pressure sensors. This means 80% of full scale pressure can be simulated at 0 pressure input by connecting the shunt resistor.

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 I-series 320 Series controller and connected it to the resin feedline flow transducer and the roving weighing platform pressure transducer. The flow transducer measures the flow of the resin used, while the pressure transducer measures the weight of glass roving used. Both measurements are displayed on the controller. From these inputs, the controller calculates and displays the ratio of glass roving to resin used. These figures can then be downloaded as a job recipe and used for future reference when the job is repeated.

Our customer has a motor generator set that requires to be controlled at 60 Hz output frequency. Texmate installed a DL-40F controller to measure and display the frequency and to control the motor speed control actuator via the 4-20 mA analog output. The analog output is scaled at 55 Hz for 4 mA and 65 Hz for 20 mA. The speed control actuator is set to 12 mA to govern the speed at a generator output of 60.0 Hz.

The customer has an application that requires to: The amp/hrs from totalizer 1 operate Setpoint 1. At programmed amp/hr intervals, a pump starts for a programmed On-time to pump replenishment chemicals to the plating tank. When Setpoint 1 energizes, totalizer 1 resets to 0, the pump cycle starts, and the amp/hrs totalizer 1 restarts. The amp/hrs from totalizer 2 operates Setpoint 2. The chemical has a total life cycle calculated in DC amp/hrs, Setpoint 2 operates an alarm advising the operator when the chemical life has been exceeded. When the chemical is changed a reset button is pressed and totalizers1 and 2 are reset to 0.

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 This application uses a I-series 320 Series controller with RTD Frequency RTD input module and boiler energy calculation macro Version 1.3.

It is no longer necessary to use combinations of transducers to achieve a power measurement and control system. A Texmate I-series 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. The optional relay, analog and serial outputs can be configured from all the above parameters to interface with a control or alarm system. APPLICATION CONCEPT Power factor gives an accurate measure of load change, particularly at low to medium loads, where current is dominated by it's magnetizing element. Where prompt action is required the optional relays in the I-series 320 Series meter can be used for protection against broken belts, pump cavitation, conveyor stalling and general overloads.

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. One of three different techniques can be selected to measure demand.

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 I-series 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. The volt reading can be viewed by pressing the UP button and the amp reading viewed by pressing the DOWN button. The date, time, volts, amps, and W.hr or kW.hr can be downloaded to a computer or a permanently connected printer either directly, at a set capture rate, or by pressing a front-panel button. The meter has up to six relays available for alarm or control functions. The relay setpoint modes can be individually programmed to activate from any channel or result.

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 I-series 320 Series controller, that produce an accurate, digitally controlled and scaled 4 to 20 mA or 0 to 10 V output. The digital value shown on the controller display is proportional to the scaled output and is adjusted directly through the front panel buttons to ensure precise and repeatable operation.

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 I-series 320 Series controller, that produce an accurate, digitally controlled and scaled 4 to 20 mA or 0 to 10 V output. The digital value shown on the controller display is proportional to the scaled output and is adjusted directly through the front panel buttons to ensure precise and repeatable operation. The auto manual station provides an automatic and manual analog control output to PLCs, process controllers, speed controllers, and actuated devices. Input to the station can be from a PLC or from almost any input sensor type. The input signal automatically controls the analog output from the auto manual station to the controlled device in the auto mode. If the operator needs to manually control the analog output independently of the input signal, the station can be switched to the manual mode using the front panel PROGRAM button. The auto manual station can then be returned to the auto mode when required by the operator. The control output will then ramp up or down at the programmed rate-of-change to provide bumpless transfer between modes. The rate-of-change is the transfer rate of the control output signal changing from the manual mode back to the automatic control output signal of the auto mode. This is set by the operator as displayed counts per second by pressing the PROGRAM and DOWN button at the same time and entering the [rAtE] menu. Manual mode control output signal high low limits can also be set.

Our customer requires a quality control test for watt/hour rating of electrical appliances. The test is carried out over 5 minutes. A Texmate DI-50E meter with a watt input module is installed. The meter is programmed to totalize the watt/hours when the start button is pressed. The meter totalizes the watts for 5 minutes and the watt/hour rating is held on the display. When the next appliance is connected, the start button is pressed, the meter is reset to 0 and counts the watts for 5 minutes again. A setpoint is programmed in the deviation mode to indicate PASS/ FAIL. The appliance ON-time is programmable to suit your application.

Our customer carries out stress tests on beams to determine the peak load pressure and the linear displacement reading at the point of failure. Texmate installed a I-series 320 Series DI-50E meter configured to display and hold the peak readings, load pressure on Channel 1, and linear displacement on Channel 2. The meter is configured to log data at a constant rate and download directly to a computer to calculate the rate of change

As a programmable meter controller (PMC), the I-series 320 Series is adaptable to one-off final assembly and quality control test jigs. The modular design of the PMC and the vast choice of input signal conditioning modules, allows production engineers to overcome many quality control challenges. The following battery and the lamp tests are basic examples of how the PMC can be designed into the production process.

For quality control, our customer requires to measure the resistance of hot copper coil windings. Texmate installed a I-series 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. A setpoint indicates "PASS" or "FAIL" of the coil under test. The meter's decimal point is set for a display resolution in milliohms (0.001 ohms) The meter can be configured with temperature compensation for almost any conducting material.

The Texmate sterilizer controller has many new and unique features making it ideal for steam sterilizer / autoclave manufacturers and refurbishers to upgrade analog sterilizers to digital control. The controller contains all the built-in temperature control and timer functions for steam sterilizer operations in easy to program menus described below. The dual alphanumeric display with a five-button IP65 polyester faceplate, fronting a 96x48mm 1/8 DIN case, is the ideal operator interface for easy programming and displaying sterilizer menu messages. Easy front panel configuration and control using instructive programming menu messages. Selectable STERILIZE ONLY or STERILIZE AND DRY cycles. Descriptive display messages showing temperature and time remaining during each cycle. Operator adjustable drying time for drying cycle with factory programmable minimum and maximum time limits. Operator selectable sterilization temperatures with factory programmable preset temperature limits. Operator adjustable sterilization time window for selected sterilization temperature. Factory programmable minimum and maximum sterilization time limits. Over / under-temperature shutdown with scrolling display fault indication: OVER TEMPERATURE FAILURE or UNDER TEMPERATURE FAILURE. Over-temperature shutdown during drying cycle. Temperature warning scrolling display message: WARNING CONTENTS ARE HOT if the door is opened and the temperature is above the factory programmed value. Factory programmable independent PID control settings for both the sterilizing and drying cycles. RTD or thermocouple and status inputs. Relay outputs for heater / vent valve control. Optional direct serial printer output with optional print format including: date, job number for day, time related temperature and time for duration of sterilize cycle, and temperature fault indication on printout. Trend analysis using optional 4000 sample time stamped data logger. For multiple unit OEM manufacturers and refurbishers, the operating system is reconfigurable using Texmate's Development System software.

Our customer has a motor generator in a large room. The room temperature is controlled by opening and closing ventilation louvers using a forward and reverse motor. When the temperature rises above the setpoint, the louver actuator motor operates for a programmed ON-time opening the louvers 10 degrees. After a programmed OFF-time, if the temperature is still above the high setpoint, the louvers open in 10 degree degree increments until the temperature falls below the high setpoint. If the temperature in the room falls below the low setpoint, the louvers progressively close keeping the room temperature within acceptable limits. Note: The relays are programmed in the repeat mode (programmable ON/OFF-time).

Our customer requires an energy efficient method of gently heating and cooling viscous solutions to assist the mixing process in the food and cosmetic industries. Texmate installed a I-series 320 Series tri-color bargraph controller to automate the process and identify the heating and cooling cycles.

Our customer has a greenhouse. The greenhouse temperature is controlled by opening and closing the roof vents using a forward and reverse motor. When the temperature rises above the setpoint, the vent actuator motor operates for a programmed ON-time opening the vents 10 degrees. After a programmed OFF-time, if the temperature is above the high / high setpoint, the vents open in 20 degree increments until the temperature falls below the high setpoint. If the temperature in the greenhouse falls below the low setpoint, the vents progressively close keeping the greenhouse temperature within required limits. Note: The relays are programmed in the repeat mode (programmable ON/OFF-time).

Our customer has greenhouses. The greenhouse temperatures are controlled by opening and closing the roof vents using a forward and reverse motor. When the temperature rises above the setpoint, the vent actuator motor operates for a programmed ON-time opening the vents 10 degrees. After a programmed OFF-time, if the temperature is above the high setpoint, the vents open in 20 degree increments until the temperature falls below the high setpoint. If the temperature in the greenhouses falls below the low setpoint, the vents progressively close keeping the greenhouse temperature within required limits. Note: The relays are programmed in the repeat mode (programmable ON/OFF-time).

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. The I-series 320 Series controller subtracts the empty bin weight from the full bin weight. The result is the fruit weight. The bin number is counted, the fruit weight is added to the total fruit weight and the average fruit weight per bin is calculated. A serial printer connected directly to the I-series controller RS-232 serial port prints a receipt detailing the day:month:year, hrs:mins:sec, number of bins, total fruit weight and average fruit weight per bin.

Our customer operates a trucking company and requires a printed record of the weight of the load being carried. Texmate installed a I-series 320 series DI-50E meter with a permanently connected serial printer and two remote pushbutton switches. The meter is connected to the weighbridge, calibrated to read in the appropriate engineering units, and programmed for the remote tare functions with all non-application codes blanked out. The output from the weighbridge load cells is fed to the meter's input signal conditioner. The meter is programmed to tare the weight of the empty truck on the weighbridge before weighing the truck and its payload. The truck and its payload are then weighed providing a payload weight only.

Our customer operates a crane with an electromagnet to lift and weigh scrap metal. Due to residual scrap metal remaining attached to the electromagnet it needs to be set to zero regularly by the operator during daily operations. For safety reasons and accuracy, the electromagnet must be cleaned when the amount of residual scrap reaches a set limit. Texmate installed a I-series 320 Series controller to display the weight and perform the display zero operations. The controller has a manual zero with the zero offset held in non-volatile memory, therefore maintaining the zero offset value in the event of a power failure. The zero function can be programmed to inhibit the zero offset when the zero limit has been reached, preventing a dangerous over-load situation from occuring.

The I-series 320 Series controller using a pH sensor input module operates directly with standard pH sensor outputs. For quick and easy sensor calibration, the I-series 320 Series controller has On-demand single and two-point calibration functions from the front panel program button. The relay outputs controlling the pH reagent are programmed in the repeat mode (programmable OFF/ON-time). After a selected time interval, the solution pH is checked (OFF-time), and if reagent is required, a programmed (ON-time) amount of the reagent chemical (acid or caustic) is added. The cycle continues until the reaction tank is at the correct pH level.