Wahl ST2200 User manual

Palmer Wahl • 234 Old Weaverville Road • Asheville, North Carolina • 28804-1260
Phone [phone] • [phone] • Fax [phone] • Email: [email protected]
www.palmerwahl.com
ST2200
Soldering Iron Tester
User Manual
W-2176
Rev E
Revised 05/29/20

ST2200 Soldering Iron Tester User Manual
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PARAGRAPH TABLE OF CONTENTS PAGE
1.0 INTRODUCTION 3
1.1 MODELS and CONTENTS 3
2.0 SPECIFICATIONS 4
3.0 CONTROLS AND ITEM DESCRIPTIONS 8
4.0 OPERATION 10
4.1 Connecting to AC Power 10
4.2 System Connections 10
4.3 Temperature Measurements 10
4.4 Tip Voltage Potential Measurements 11
5.0 REPLACEMENT SENSORS AND ACCESSORIES 13
5.1 Sensors 13
5.2 Probes 14
5.3 Carrying Case 14
6.0 MAINTENANCE 15
6.1 Display Resolution Setting 15
6.2 Sensor Maintenance 15
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 Resolution Jumper Locations 16
4 Sensor Repair - Band Replacement 18
5 A/D and Temperature Calibration Setup 20
6 Resistance (Ohms) Calibration Setup 20
7 Millivolt Calibration Setup 24
8 Spike Test Setup 24
9 Simplified System Block Diagram 31
10 Component Layout Diagram 32
11 Schematic - Page 1 33
11 Schematic - Page 2 34

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1.0 INTRODUCTION
The Wahl Instruments Model ST2200 Soldering Iron Tester (see Fig. 1) is designed for
the testing of hand-held soldering irons used in the assembly of electronic circuits and
components. It is intended to be used as a quality tool to assist manufacturers in
complying with Soldering Standard IPC/EIA J-STD-001C or other applicable standards.
It provides testing of Temperature, AC voltage, AC + DC voltage and Resistance to
Ground. It also has a feature for testing Anti-static Wrist Straps and for detecting voltage
spikes which might appear on the soldering iron tip.
1.1 MODELS and CONTENTS
Following is a list of the different models available along with a list of contents.
The following models include a 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 British Plug and European Receptacle
ST220C-220E °C display, 220 volt input voltage
with European Plug and Receptacle
WARRANTY & CALIBRATION
REGISTRATION at
www.palmerwahl.com/register
Registration is fast and easy. In about a minute you
can have your product automatically registered for
Warranty Protection and our Calibration Reminder
service. Let Palmer Wahl help you protect your
investment, and maintain product accuracy and
compliance with ISO and other quality standards.
Questions? Call Customer Service
at 1-800-421-2853 or 828-658-3131
Or email: [e-mail]

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The following Kits include 2 WST-02B sensors, TC800K type K Wire Probe, TC801P
solder pot probe, sensor cleaning brush, 12423-01 soft carrying case and
operation/calibration manual. NIST Traceable Certificate of Conformance is optional.
KST2200C-110 °C display, 110 volt input voltage
KST2200F-110 °F display, 110 volt input voltage
KST2200C-220 °C display, 220 volt input voltage
KST2200F-220 °F display, 220 volt input voltage
The following Kits include 1 WST-03 sensor, 1 WST-02B sensor, TC800K type K Wire
Probe, TC801P solder pot probe, sensor cleaning brush, 12423-01 soft carrying case and
operation/calibration manual. NIST Traceable Certificate of Conformance 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/C, switchable to 1.0°F/C via
internal jumper (see section 6.1 for details).
Meter Accuracy: Greater of ±1.0°F/C or ±0.1% of reading.
Sensor: WST-02B, 0.2 gram thermal mass sensor with
bonnet.
Optional Sensors: WST-02, 0.2 gram thermal mass sensor without
bonnet.
WST-03, elevated wire sensor.
Resistance Specifications:
Resistance Range: 0.00 to 100.00 Ohms
Resolution: Factory set at 0.01 Ohms. Switchable to 0.1 Ohm
via internal jumper (see section 6.1 for details).
Accuracy: 0-20 Ohms: ±0.15 ohm, ± 1 digit
20 - 100 Ohms: ±0.5% ± 0.1 ohm

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Test Current: 10 mA DC
LED Warning Indicator: Factory set at 5.00 Ohms. Switchable to 2.00 Ohms
via internal jumper (see section 6.1 for details).
Millivolt Specifications:
Voltage Range: 0 - 30mV true RMS AC or AC+DC range.
Resolution: Factory set at 0.01 mV. Switchable to 0.1 mV via
internal jumper (see section 6.1 for details).
Accuracy: ±0.1mV ± 1 digit.
LED Warning Indicator: Indicates at 2.0mV threshold.
Digital Display: 4-1/2 digit LCD, 0.7" high characters.
Output Jack:
Type: .101" Subminiature phone jack
Temperature: 1.0 mV/degree, ±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 probes.
User selectable by front panel switch.
Wrist Strap Tester: Activated in Resistance /Wrist Strap Test position.
Bi-color LED indicates Green when in acceptable
range of 500K to 10M ohms. Red when outside of
acceptable range.
Voltage Spike Detector: Activated in both Millivolt ranges. Indicates green
in no-fault condition and flashes red for approx.
1 sec. when spike detected.

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Spike Detect Threshold: >100mV 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.

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Figure 1. ST2200 Soldering Iron Mil Spec

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3.0 CONTROLS AND ITEM DESCRIPTIONS
Numbers in (parenthesis) Reference Figure 1.
3.1 (1) AC Power Cord
The ST2200F-110 and ST2200C-110 units come with a 5 foot long 3 wire North
American power cord. Models ST2200F-220 and ST2200C-220 come with a 5
foot long 3 wire European power cord. Cord storage is provided on integral cord
wraps on rear of the unit.
3.2 (2) LCD Display
Easy to read .7 inch high 4-1/2 digit display. Resolution is switchable via internal
jumper. See the Maintenance Section 6.1 for details on setting resolution.
3.3 (3) FAIL MV/OHM Indicator
This indicator serves as a Pass/Fail indicator for both MV and Resistance
measurements. It is a bi-color LED which displays Green when unit under test is
acceptable or flashes Red when the unit is unacceptable. See the Specifications
section 2.0 or the Operation section 4.0 for details on the threshold limits.
3.4 (4) AC Convenience Outlet
This outlet is provided as a power source for the Unit under Test. All units come
with a North American receptacle and have power available 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 operation is the TIP TEST position. For Auxiliary type K
thermocouple probe input set Input Selector Switch to "AUX T/C - K" position.
Auxiliary probes may be used to test solder pots, wave solder baths, hot air guns or
ovens. See Accessories Section 5.0 for optional T/C probes for your specific need.
3.6 (6) Auxiliary Thermocouple Connector
This input connector is provided to interface optional Type K thermocouple probes
to the ST2200 unit. With the input selector switch set to AUX T/C-K the unit will
use the signal input to this connector as the source for measurements.
3.7 (7) ESD Protected Case
The ST2200 is designed for use in ESD protected areas. The case is grounded and
coated with chloride-free liquid anti-static protectant. The case has been tested for
triboelectric effect during normal operation. It will neither generate a charge nor
support a static electricity discharge.

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The internal circuitry of the ST2200 is protected against static discharge that may
be applied to the sensor during test of soldering irons or when the auxiliary
thermocouple connector is used.
3.8 (8) Sensor
ST2200 Soldering Iron Testers are shipped with Model WST-02B heavy duty bead
sensor. Sensors with bonnets are designed to aid in the positioning of the iron tip.
Sensors plug in for ease of maintenance or replacement. See Accessories Section
5.0 for optional sensors.
3.9 (9) Wrist Strap Test
This area provides convenient go/no-go testing of wrist straps. It consists of a
jack for the wrist strap to plug in to, a grounded acorn nut for the operator to
touch and a bi-colored LED for test result indication.
3.10 (10) Power On-Off / Function 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 is placed in contact with the sensor.
3.11 (11) Voltage Spike Indicator
This indicator serves as an indicator for the detection of voltage spikes detected
during MILLIVOLT testing. It is a bi-color LED which displays Green when no
spike is present and flashes Red when the spike is detected. See the
Specifications section 2.0 or the Operation section 4.0 for details on the spike
threshold limits.
3.12 (12) Recorder Output Jack
.101" Subminiature phone jack (Switchcraft p/n MDPC-2A-RA) for interfacing to
chart recorder or analog input card. See Specifications Section 2.0 for details.
4.0 OPERATION

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To make measurements on a soldering iron, connect the instruments as outlined below,
and preheat the iron to its operational temperature. For optimal results the Soldering Iron
under Test should be plugged into the AC Convenience Outlet on the right side of the
ST2200. For technical notes pertaining to measurements see Technical Information
Section 8.0.
4.1 Connecting to AC Power
The ST2200 is a portable tester powered by 110 or 220VAC, depending on
specific model. Unwrap the AC power cord (1) from the integral Cord Wraps
located on the rear of the unit. Plug AC plug into appropriate AC receptacle. For
optimum operation, plug the soldering iron into the AC Convenience 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. System Connections
4.3 Temperature Measurements
For Temperature readings, set the Function Selector Switch to TEMPERATURE ,
the Input Selector Switch to TIP TEST and touch the soldering iron tip to be
tested to the solder bead or wire of the sensor. The normal working area of the tip
should be used and the tip should be placed on the sensors cold solder bead,
allowing a few seconds for it to melt. This allows the sensing junction of the
sensor to be heated to the same temperature as the iron tip. Continue to hold the