ED-530 PORTABLE EDDY CURRENT INSTRUMENT

 

EQUIPMENT  SPECIFICATION  ES-106

 

1.0    Description

 

1.1       The Model ED-530 is a microprocessor-based portable, self-contained, electronic instrument, which offers high sensitivity, versatility, and simplicity of operation.  A continuously variable frequency control tunes an oscillator, which drives a bridge circuit, one leg of which contains the test probe or coil.

 

1.2       The instrument will locate surface and near-surface discontinuities in nonmagnetic materials and surface defects in magnetic materials where permeability is relatively constant throughout the test area.  The ED-530 will sort both classes of materials according to such properties as hardness, alloy type, carbon content, heat treat condition, tensile strength, and grain structure where these relate to changes in the magnetic and electrical characteristics of the test part.  Also, it will measure coating thickness and relative conductivity.

 

 

2.0     Mechanical and Construction

 

2.1       Dimensions:  5” high x 9.75” wide x 10” deep  (12.7 cm x 24.7 cm x 25.4 cm)

 

2.2       Weight:  5.5 pounds  (2.5 kg)

 

2.3       Readout:  Rectangular meter, 3.5” (8.9 cm) wide.  Scale numbered from 0 to 500 in 50 divisions

 

2.4       The ED-530 is housed in a lightweight, high-impact ABS enclosure.  The adjustable carrying handle also serves as the tilt stand.  It is designed to operate in a temperature range of 0^o F to 120^o F at 85% relative humidity.

 

 

3.0     Electrical and Performance

 

3.1       The frequency range is variable from 55 kHz to 220 kHz.

 

3.2       The instrument is operated from internal rechargeable nickel cadmium batteries or from 115/ 220 volts AC, 50/60 Hz line power.

 

3.3       Power consumption from the battery is 4.8 volts, DC, at 120 mA and from the line 115 volts, AC, 10 watts.

 

3.4       The battery charger is built into the instrument and is energized through a 3-wire grounded power cord with polarized molded vinyl plug.

 

3.5       The batteries are rated for approximately 10 hours continuous operation from the fully charged state, at 70^o F, before recharging is necessary.  The recharge time required is 10 to 14 hours.  

 

 

4.0     Operation

 

4.1       The row of pushbuttons located on the bottom of the front panel selects the major operation features of the unit.  From right to left, the first group powers the unit, set gain levels, read out the operating frequency and determine battery level.  The next group is used to set the lift-off of the unit or for sorting functions.  The “BAL” is used to bring the meter pointer to mid-scale.  The last group is used in connection with the internal audio alarm gate.

 

            4.1.1    “ON/OFF” -- Locking pushbutton which powers the unit

 

            4.1.2    “HIGH, MED, LO” -- Locking pushbuttons which set the unit’s overall gain

 

            4.1.3    “FREQ” -- Momentary pushbutton enables the oscillator frequency to be displayed on the front meter

 

            4.1.4    “BAT” -- Momentary pushbutton that displays on the front meter the charge status of the battery

 

4.1.5    “SCAN” -- Momentary pushbutton used when the “L.O.” pushbutton is in enabling the microprocessor to set lift-off

 

            4.1.6    “SORT” -- Locking pushbutton when the unit is used for a sorting application

 

4.1.7    “L.O.” -- Locking pushbutton stands for lift-off.  Used to set lift-off when doing flaw detection

 

            4.1.8    “BAL” -- Momentary pushbutton used to bring the meter pointer to mid-scale

 

4.1.9    “U/D” -- Locking pushbutton that determines whether the audio alarm will sound as the meter pointer travels upscale or downscale

 

4.1.10  “TONE”  -- Locking pushbutton that allows the frequency of the audio alarm to change as the meter pointer moves up and down the scale

 

            4.1.11  “THR”  -- Locking pushbutton used when the threshold of the audio alarm is set

           

4.2       The “BALANCE” control is a ten-turn potentiometer.  The control adapts the probe used to the bridge circuit and is used to position the meter pointer on the scale.

 

4.3       The “SENSITIVITY” control is a multi-turn potentiometer used to set the sensitivity level at any point between the gain pushbutton settings.  Maximum sensitivity is obtained with this control set fully clockwise.

 

4.4       The “VOL.” control is a multi-turn potentiometer used to set the volume of the audio alarm.  Maximum volume is obtained with this control set fully clockwise.

 

4.5       The “PHONE” connector is available to connect headphones to the unit.  When the headphones are plugged in the audio alarm is disabled.

 

4.6       The “FREQUENCY” control is a ten-turn potentiometer with a locking counting dial.  It provides a continuously variable frequency range of 55 kHz to 220 kHz to select the proper operating frequency for lift-off compensation.

 

4.7       The “THRES.” control is a multi-turn potentiometer used to set the point on the meter where the audio alarm sounds.

 

4.8       The “GATE” indicator is a red light emitting diode, which serves as a visual indication that the meter pointer has passed through the gate threshold.

 

4.9       The “LINE” indicator is a red LED that lights whenever the AC line cord is plugged into the unit.

 

4.10     The “PROBE” connector is a panel mounted BNC connector used to connect the eddy current probe to the unit.

 

4.11     The “HOLD” indicator is a red LED that lights when the “SCAN” button is depressed.  It serves as a visual indicator that the microprocessor is setting up the lift-off of the probe.

 

 

5.0     Order Reference

 

5.1       The Model ED-530 Portable Eddy Current Instrument, P/N 215360A, in high-impact plastic enclosure, operation on self-contained rechargeable nickel-cadmium batteries or 115/50-60/1 (or 220/50-60/1 not interchangeable) including: operating manual, aluminum sensitivity standard, line cord, general purpose probe and probe cable.

 

5.2       Standard Accessories

 

5.2.1    Aluminum Sensitivity Standard, single .015” slot, P/N 205156

 

5.2.2    Line Cord, P/N 213214

 

5.2.3    General Purpose Probe, P/N 222296

 

5.2.4    Probe Cable, P/N 210816

 

5.3       Addendum Accessories

 

5.3.1    General Purpose Miniprobe, 1-1/8” long x 5/16” diameter, P/N 207067

 

5.3.2    General Purpose Probe, 4” long x 3/8” diameter, P/N 62743

 

5.3.3    General Purpose Probe, 5” long x 1/4” diameter, P/N 200634

 

5.3.4    General Purpose Probe, 4” long x 1/8” diameter, P/N 223400

 

5.3.5    Various Bolt Hole Probes (Consult Probe Catalog)

 

5.3.6    Various Hemispherical Probes (Consult Probe Catalog)

 

5.3.7    Various Sorting Coils (Consult Probe Catalog)

 

5.3.8    Strip Chart Recorder, P/N 519354      

 

5.3.9    Aluminum Test Block, .008”, .020”, .040” deep slots, P/N 207066

 

5.3.10  Absolute Pencil Probe Kit, P/N 219586

                        Consists of:           1 ea. P/N 223400  Pencil Probe

                                                                1 ea. P/N 223695  Right Angle Pencil Probe

                                                                1 ea. P/N 222296S Short General Purpose Probe

                                                                1 ea. P/N 210816  Probe Cable

 

 

6.0    References

 

6.1              Instruction Manual, Form No. 20610A, effective December 2, 1993

 

 

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