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ST2200 Soldering Iron Tester User Manual

Page 31 of 34

Figure 9. ST2200 Simplified System Block Diagram

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Summary of Contents for ST2200

Page 1: ...d Weaverville Road Asheville North Carolina 28804 1260 Phone 800 421 2853 828 658 3131 Fax 828 658 0728 Email info palmerwahl com www palmerwahl com ST2200 Soldering Iron Tester User Manual W 2176 Rev E Revised 05 29 20 ...

Page 2: ...5 6 3 Sensor Repair 17 7 0 CALIBRATION PROCEDURE 19 8 0 APPLICATIONS TECHNICAL INFORMATION AND TROUBLESHOOTING 26 8 1 Solder Pot and Wave Solder Machines 26 8 2 Embedded Thermocouple in Soldering Iron Tip 26 8 3 Ground Measurement Technical Info 26 8 4 Circuit Description 28 8 5 Troubleshooting 28 FIGURE FIGURE DESCRIPTION PAGE 1 Control Identification 7 2 System Connections 10 3 Display Resolutio...

Page 3: ... WST 02B sensor TC800K 3ft Type K wire bead probe sensor cleaning brush p n 12408 and operation calibration manual NIST Traceable Certificate of Conformance is optional ST2200C 110 C display 110 volt input voltage ST2200F 110 F display 110 volt input voltage ST2200C 220 C display 220 volt input voltage ST2200F 220 F display 220 volt input voltage ST220C 220B C display 220 volt input voltage with B...

Page 4: ... is optional KST2203C 110 C display 110volt input voltage KST2203F 110 F display 110volt input voltage KST2203C 220 C display 220volt input voltage KST2203F 220 F display 220volt input voltage 2 0 SPECIFICATIONS Input Power 110 Models 110VAC 50 60 Hz 2 Watts 220 Models 220VAC 50 60 Hz 2 Watts Temperature Specifications Temperature Range 50 F to 1300 F 10 C to 700 C Resolution Factory set at 0 1 F ...

Page 5: ... F Resistance 100 mV Ohm for the 0 30 Ohm range 0 15 Ohm Voltage 100mV mV for the 0 30mV range 0 15mV Protection Short circuit and Over Voltage protected Auxiliary AC Outlet Equipped with North American receptacle Note 220Volt models also equipped with North American receptacle marked as 220VAC Auxiliary T C Connector Mini Type K thermocouple female connector provided for use with optional T C pro...

Page 6: ... amplitude 1 uS pulse width Ambient Environment Operational 45 F to 105 F 7 2 C to 40 5 C Storage 4 F to 122 F 20 C to 50 C Dimensions 8 5 W x 10 5 D x 3 5 H 21 59cm x 26 67cm x 8 89cm Weight 3 lbs 1 36 Kg Calibration Certificate NIST Traceable Certificate of Calibration is optional ...

Page 7: ...ST2200 Soldering Iron Tester User Manual Page 7 of 34 Figure 1 ST2200 Soldering Iron Mil Spec ...

Page 8: ...le anytime the ST2200 is plugged in NOTE 220 volt models supply 220vac at this connector It is recommended to use this outlet as power source for your unit whenever possible to achieve optimal results 3 5 5 Input Selector Switch This switch selects between the ST2200 sensor and the Type K thermocouple connector inputs For soldering iron testing set Input Selector Switch to TIP TEST position Normal...

Page 9: ...ion Selector Switch Power is provided to the unit anytime the Function Selector Switch is in any position other than OFF In normal operation with the Function Selector Switch in the TEMPERATURE position the display will indicate ambient room temperature With the Function Selector Switch set to either MILLIVOLT position or RESISTANCE position the display will indicate 1 until the soldering iron tip...

Page 10: ...nience Outlet 4 located on the right side of the ST2200 Note that for testing soldering irons that will not be plugged into the ST2200 s AC Convenience Outlet the ST2200 should be plugged into an AC receptacle with the identical ground wire as the irons to be tested 4 2 System Connections Figure 2 shows several methods of connecting the ST2200 for Production and Quality Assurance testing Figure 2 ...

Page 11: ...g station or the setting of the soldering iron control Following are possible reasons a The tip may be oxidized and may need to be cleaned and re tinned b May be due to the method the iron was last calibrated Manufacturers may use a special tip for calibration purposes which may be different from your tip c The ST2200 sensor may need to be cleaned and a new solder bead applied See section 6 2 for ...

Page 12: ...Detection of a potentially damaging voltage spike is indicated by the Voltage Spike indicator 11 flashing from GREEN to RED Each voltage spike transient detected will flash the indicator for approximately one second 4 5 Resistance Measurement The ST2200 measures resistance of the soldering iron probe tip to AC ground To measure set the Function Selector Switch to the RESISTANCE setting and touch t...

Page 13: ...ip at the area to be measured Type K thermocouple material is chosen for its high temperature stability accuracy and long life in the soldering temperature range of 500 900 F It is a good electrical conductor and therefore allows accurate measurements of tip voltage potential and tip to ground resistance The solder bead is important because it simulates a solder joint provides excellent thermal tr...

Page 14: ...T2200 We suggest the following probes as possible solutions to your measurement task TC801P Solder Pot probe for immersion measurements of solder pots or wave solder baths Will sense temperature to 1600 F mV or resistance TC803 Surface probe with low mass 0 032 diameter tip for measuring pc board surfaces or component temperatures TC305 Miniature Air probe for ambient air temperature or checking h...

Page 15: ...ce between 2 00 ohms and 5 00 ohms For 2 00 Ohm threshold place the top jumper indicated by jumper A on Fig 3 in the lower position labeled 2Ù Place the bottom jumper indicated by jumper B on Fig 3 in the lower position labeled 2Ù For 5 00 Ohm threshold place the top jumper indicated by jumper A on Fig 3 in the upper position labeled 5Ù Place the bottom jumper indicated by jumper B on Fig 3 in the...

Page 16: ...ST2200 Soldering Iron Tester User Manual Page 16 of 34 Figure 3 Display Resolution Jumper Locations ...

Page 17: ...ve old sensor strap 5 Insert new strap per Step C and fasten with 2 screws on top of sensor Arrow point must face direction shown 6 Bend bands over edge of housing per Step D Hold firmly against side while pushing plastic plug to bottom of hole 7 Cut excess lead per Step E then push cut lead into screw hole and install two screws to secure per Step F 6 3 2 WST 03 Repair Wire Replacement All instru...

Page 18: ...ST2200 Soldering Iron Tester User Manual Page 18 of 34 ...

Page 19: ...re WARNING AC Line Voltage is present in the cabinet and on the PC Board when unit is plugged in to Power Source Power switch DOES NOT have to be on for Voltage to be present 7 7 Equipment Needed 7 7 1 Thermocouple Simulator D C Millivolt Source referred to as T C Sim hereafter such as AOIP Calys5 or Wahl C 65 7 7 2 AC Milli volt Generator 7 7 3 DVM with 1 0 milli volt or less resolution and True ...

Page 20: ...ST2200 Soldering Iron Tester User Manual Page 20 of 34 Figure 5 Temperature Calibration Figure 6 Ohms Calibration ...

Page 21: ... and to TP6 7 10 Low Temperature Calibration Note Allow 5 minutes thermal stabilization period after connecting input wires to the ST2200 7 10 1 Adjust T C Simulator output to 77 0 F 25 0 C 7 10 2 Adjust R4 Temp zero until UUT display indicates 77 0 F 25 0 C 7 11 High Temperature Calibration 7 11 1 Adjust T C Simulator for 1300 0 F 704 4 C and adjust R86 Span until UUT display indicates 1300 F 704...

Page 22: ... will be 0 20 and 50 20 ohms respectively 7 12 4 Connect the Decade Box as shown in Figure 6 For best results solder a small piece of wire to the solder bead of the tip sensor and attach the alligator clip from the Decade Box to it 7 12 5 Set Function Selector Switch to RESISTANCE and Input Selector Switch to TIP TEST positions 7 12 6 Set Decade Box to 0 00 ohms and adjust R33 for a reading equal ...

Page 23: ...Selector Switch to TIP TEST positions 7 13 4 With the Millivolt Source power switch set to OFF note the AC reference voltmeter reading call this V1 and adjust R19 for an ST2200 display reading of 0 02mV NOTE In the event that the unit is at 0 00mV and fluctuates negative by as little as 01mV the FAIL MV OHM indicator will flash Red thus indicating a false failure To prevent this an offset bias of ...

Page 24: ...ST2200 Soldering Iron Tester User Manual Page 24 of 34 Figure 7 Millivolts Calibration Figure 8 Spike Test ...

Page 25: ...on The Spike Test section is to verify the spike detection circuit is functioning properly There are no adjustments to this circuit thus a failure of this test would need to be looked at by a qualified technician or returned to Wahl Instruments for evaluation and repair 7 15 1 Set the Pulse Generator for a 1 microsecond 100mV pulse 7 15 2 Connect the Pulse Generator to the ST2200 sensor as shown i...

Page 26: ...ouple embedded in the tip can be measured using the AUX T C K input The tip temperature can be measured either from the AUX T C K input or the TIP TEST input Tip voltage potential measured from the embedded thermocouple will be accurate on the AC only function The AC DC position will be in error due to thermocouple effects Tip Resistance measured from the embedded thermocouple will be in error due...

Page 27: ...hen subtracts if the orientation of the AC power cord connections is reversed Therefore as little as 10 millivolts of either polarity will cause a variance of the ST2200 digital display of 1 0 ohms as the scale factor is 1 0 ohms per 10 millivolts of the voltage measured Should this phenomenon be seen it would indicate that there is excessive ground current flowing caused by a faulty piece of equi...

Page 28: ...its power cable Ohms are displayed in engineering units of Ohms The analog to digital converter is a 16 bit dual slope converter which features auto zero drift nulling capability and excellent long term stability The Display is a 0 7 inch 4 1 2 digit bright LCD display In addition peripheral LED status indicators provide flashing go no go warnings at preset levels when tip voltage or tip resistanc...

Page 29: ... the AC line If more than the 5 ohms or so is measured there may be a problem with the ground in the soldering iron or the AC line receptacle 8 5 3 Troubleshooting Resistance Measurement Problems The contact resistance from the soldering iron power cord to the AC line and the contact resistance from the ST2200 power cord to the AC line will cause most of the indicated error in this measurement ass...

Page 30: ...trap under test indicates a failure following are possible causes 1 Check that the wrist strap cable connector is connected properly to the ST2200 See Figure 1 Item 9 for wrist strap connector location Do not rely on common ground of AC line for wrist strap testing 2 Make sure the operator is not touching any other conductive material Ensure that the operator s free hand is not in contact with any...

Page 31: ...ST2200 Soldering Iron Tester User Manual Page 31 of 34 Figure 9 ST2200 Simplified System Block Diagram ...

Page 32: ...ST2200 Soldering Iron Tester User Manual Page 32 of 34 Figure 10 Component Layout Diagram ...

Page 33: ...ST2200 Soldering Iron Tester User Manual Page 33 of 34 Figure 11 Schematic Diagram ...

Page 34: ...ST2200 Soldering Iron Tester User Manual Page 34 of 34 Figure 11 Schematic Diagram page 2 ...

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