Oven Temperature Profile Measurement (Model 4010)

Dimensional Classification of Parts (Model 4030)

Position Feedback Control (Model 4030)

Automatic Control of Valve Position (Model 4030)

Measurement of TIR as Displacement "MAX minus MIN" Value (Model 4030)

Measurement of Thickness Using Opposed LVDT's (A + B) (Model 4032)

Measurement of Taper, Slope, or Tilt Using Parallel LVDT's (A - B) (Model 4032)

Dimensional Monitoring of a Rotating Part (Model 4032)

Mass Flow Measurement (Models 4040 and 4010)

Measuring Amount of Conveyed Material (Models 4040 and 4077)

Measurement of AC Voltage, Current, or Power (Single- or 3-Phase) (Model 4060)

Monitoring the pH Levels of Remotely Stored Liquids (Model 4060N network)

Control of Carpet Shearing (Model 4062)

Monitoring Wheel Roundness (Model 4062)

Monitoring Web Tension (Model 4077)

Flow Measurement Derived from Pressure Drop Across an Orifice (Model 4077)

Measuring Valve Opening Pressure (Model 4077)

Leak Testing of Hydraulic Hoses (Model 4077)

Closed-Loop Servo System (Model 4077)

Stress Analysis Using External Bridge Completion (Model 4077 with Model 10CJB-2)

Automatic Sorting of Springs (Model 4077)

Monitoring Engine Torque (Model 4078)

Monitoring the Thickness of Latex Carpet Backing (Model 4K/SPC-62)

SPC Testing of Fastener Tensile Strength (Model 4K/SPC-77)

Engine Dynamometry (Model 4K/HP)

Batch Weighing (Model 4K/WT-77)

Capturing Press Peak Values (Model 4K/PM-77)

Oven Temperature Profile Measurement     [Back ]

See the Model 4010 Four-Channel Thermocouple Instrument

Dimensional Classification of Parts     [Back ]

See the Model 4030 Single-Channel AC LVDT Instrument

Position Feedback Control     [Back ]

See the Model 4030 Single-Channel AC LVDT Instrument

Automatic Control of Valve Position     [Back ]

See the Model 4030 Single-Channel AC LVDT Instrument

Measurement of TIR as Displacement "MAX minus MIN" Value     [Back ]

See the Model 4030 Single-Channel AC LVDT Instrument

Measurement of Thickness Using Opposed LVDT's (A + B)     [Back ]

See the Model 4032 Two-Channel AC LVDT Instrument

Measurement of Taper, Slope, or Tilt Using Parallel LVDT's (A - B)     [Back ]

See the Model 4032 Two-Channel AC LVDT Instrument

Dimensional Monitoring of a Rotating Part     [Back ]

See the Model 4032 Two-Channel AC LVDT Instrument

Mass Flow Measurement     [Back ]

Measuring fuel flow in an engine test cell, a turbine flowmeter normally yields volumetric output.  Using this system, however, it can be calibrated in more useful mass flow units, by correcting for specific-gravity variations resulting from temperature changes in the measured fluid.  A Model 4010 Four-Channel Thermocouple Instrument is used to measure fuel temperature.  The supervisory computer calculates the mass-flow correction factor from data supplied by the Model 4010 and the Model 4040 Single-Channel Frequency Instrument over the GPIB bus (using the Model 10CIF488A IEEE Interface Adaptor).

Measuring Amount of Conveyed Material     [Back ]

This system determines the amount of clay (or other continuously processed material) on a conveyor belt.  A Model 4077 Single-Channel DC Strain Gage Instrument is used to measure belt load, while a Model 4040 Single-Channel Frequency Instrument measures belt speed on the basis of roller RPM.  The supervisory computer calculates the amount of conveyed material by multiplying belt load (lbs) by belt speed (rpm).  Measurement data is transmitted by the Models 4077 and 4040 over the GPIB bus (using the Model 10CIF488A IEEE Interface Adaptor).

Measurement of AC Voltage, Current, or Power (Single- or 3-Phase)     [Back ]

See the Model 4060 Single-Channel DC/AC Voltage Instrument

Monitoring the pH Levels of Remotely Stored Liquids     [Back ]

See the Model 4060 Single-Channel DC/AC Voltage Instrument and the 4000 Series "N" Option (RS485 Network Operation).

Control of Carpet Shearing     [Back ]

Using a pair of high-resolution laser displacement sensors, this system displays and controls the amount of carpet material removed by a shearing machine, providing immediate feedback and alarming when an out-of-control trend or condition occurs.  A "CALCULATE" channel within the Model 4062 Two-Channel DC Voltage Instrument determines final carpet thickness by subtracting the thickness measured by Laser Sensor 2 (after shearing) from that measured by Laser Sensor 1 (before shearing).  Laser Sensor 1 also serves as a seam detector.  When a carpet seam is detected, the blade is automatically raised to avoid damage to its edge.  See also Monitoring the Thickness of Latex Carpet Backing using the "SPC" version of the Model 4062.

Monitoring Wheel Roundness     [Back ]

See the Model 4062 Two-Channel DC Voltage Instrument

Monitoring Web Tension     [Back ]

See the Model 4077 Single-Channel DC Strain Gage Instrument

Flow Measurement Derived from Pressure Drop Across an Orifice     [Back ]

A "CALCULATE" channel internal to the Model 4077 Single-Channel DC Strain Gage Instrument is used to determine the actual flow rate, which is directly proportional to the square root of ΔP (pressure difference across the orifice).

Measuring Valve Opening Pressure     [Back ]

This system tests the valve opening pressure (VOP) of diesel-engine fuel injectors or of pressure relief valves.  To start the test, the inlet pressure is caused to ramp upwards from zero to a high final value.  When it reaches the point of valve opening, there is a momentary dip (see graph) caused by the sudden increase in flow and partial restriction in the supply line.  At this point the analog "+PEAK" channel of the Model 4077 Single-Channel DC Strain Gage Instrument captures the peak inflection value.  A "MAX CALCULATE" channel operating on the "+PEAK" channel then holds the captured peak value without decay, until the system is reset.

Leak Testing of Hydraulic Hoses     [Back ]

This on-line leak detection system uses a Model 4077 Single-Channel DC Strain Gage Instrument to measure pressure decay (ΔP) within a given time interval.  Accepting the output of a conventional strain gage pressure transducer, the 4077 works in conjunction with a solenoid valve and relay controller to manage the hose test sequence and accept/reject process.  The 4077's internal channels and bits can be easily set up to accomplish all required functions, including timing operations, signal hold, "delta pressure" calculation, limit logic (six independent setpoints per scanned data channel), control outputs, and automatic event-triggered command execution.  For full details, see Daytronic Application Note No. 4K.4.1.

Closed-Loop Servo System     [Back ]

The ±10 VDC ANALOG OUTPUT of the Model 4077 Single-Channel DC Strain Gage Instrument is here employed as an error signal, representing the continuously calculated difference between an adjustable setpoint and the conditioned "feedback" value derived from the 4077's strain gage input channel.  In this sytem, the loading of a tire under test is precisely controlled, regardless of tire wear, changes in hydraulic pressure, or other disturbing factors.  The error-signal gain can be adjusted to give "tight" yet stable servo action.

Stress Analysis Using External Bridge Completion     [Back ]

See the Model 4077 Single-Channel DC Strain Gage Instrument and the Model 10CJB-2 Bridge Completion Card.  In applications such as this, the lowest (5 V) excitation level should be used to help reduce gage heating effects.

Automatic Sorting of Springs     [Back ]

In this system, helical compression springs are automatically sorted into different shipping containers—or scrap bins—based on their relative stiffness.  The springs are individually sorted in 10-gram ranges between 110 and 190 grams.

A Model 4077 Single-Channel DC Strain Gage Instrument measures and evaluates the maximum force applied by each spring when it is compressed.  Given the relatively slow ram speed that must be used to obtain force measurements of the highest accuracy, employing a "MAX CALCULATE" channel to determine peak spring force under compression is a simpler and (in this application) more efficient technique than using the 4077's analog peak capture function.  With each new spring to be measured, the "MAX" channel is reset to 0 (grams) by a CHN= command.  This command is automatically applied with each turn of the index table via a logic-input activated EXECUTE (EXU) function.

An appropriate logic control output is issued by the 4077 for each measured spring.  Through the PLC, this output directly activates one or more solenoids that control the respective positions of a series of deflector plates in an inverted Y-shaped chute.  As each spring is pushed into the chute (after its maximum compression force has been measured and evaluated), the movement of the correct plate(s) ensures that it is channeled to the correct container or bin.  On reset, any open diverter plates in the sides of the chute are automatically closed.

For full details, see Daytronic Application Note No. 4K.3.1.

Monitoring Engine Torque     [Back ]

See the Model 4078 Single-Channel AC Strain Gage Instrument

Monitoring the Thickness of Latex Carpet Backing     [Back ]

In this application, the Model 4K/SPC-62 Dual DC Voltage Statistical Process Control Instrument can display not only the "live" thickness measurement, but also "live" statistical data: X-BAR, R, Standard Deviation, X-BAR-BAR, and R-BAR.  If required, multiple units can be networked via RS485 linkage to one central supervisory PC.  Collected data can be stored on-board in the 4K/SPC-62's 6000-reading History Memory, can be directly transmitted to the host computer, or can be exported to a third-party SPC or spreadsheet software package for further analysis, capability studies, historical data management, custom report generation, etc.  For full details, see Daytronic Application Note No. 10K/4K.1.1 ("Two Carpet Manufacturing Applications").

SPC Testing of Fastener Tensile Strength     [Back ]

A Model 4K/SPC-77 Single-Channel DC Strain Gage Statistical Process Control Instrument is connected to the load cell transducer of a conventional materials testing load frame.  Using the analog peak capture capability of the Model 4077, the system captures and holds the maximum tensile load each tested part can withstand before material degradation begins to occur.  The 4K/SPC-77 generates analytical data for any subgroup size from 2 to 25.  It can display X-BAR, R, Standard Deviation, and Variance for the last complete subgroup, plus X-BAR-BAR, R-BAR, and Standard Deviation for the last 100 subgroups taken since SPC was reset.  Control limits, warning limits, and specification limits are continuously indicated by front-panel bargraph displays.

Using front-panel push buttons, the operator can select any of up to 30 prespecified types of parts to be tested, without having to manually reconfigure the system.  Also, the instrument can "learn" automatically what statistical control limits to apply to a given part, based on a standard ±3-sigma calculation, once a complete subgroup of samples has been taken.  The operator need not be concerned with the entry of control limits (although fixed, user-entered limits can be used, if desired).

Like all 4000 Series models, the 4K/SPC-77 is a fully stand-alone instrument.  Multiple units can be networked via RS485, however, so that a central supervisory computer can control the entire statistical process.  The computer can send simple mnemonic commands to any 4K/SPC-77 "node" in order to interrogate for current subgroup status, current "history" status, and particular SPC data values.  Commands also exist for halting and starting the statistical process, for resetting the current subgroup, and for resetting the entire statistical process (once a given test has been completed and the data safely offloaded from the 4K/SPC-77).

Engine Dynamometry     [Back ]

See the Model 4K/HP Horsepower Instrument

Batch Weighing     [Back ]

See the Model 4K/WT-77 Industrial Weighing Instrument

Capturing Press Peak Values     [Back ]

See the Model 4K/PM-77 Peak Monitor Instrument