Service Manual SureTemp® Plus Model 690 and 692 Thermometers Part No. 71221-0000 Rev.
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Table of Contents Electromagnetic Immunity and Emissions Declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Immunity Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Emissions Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Calibration Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.6.1 Cal-Key Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.6.2 Model 9600 Calibration Tester Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.6.3 Model 9600 Plus Calibration Tester Verification . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electromagnetic Immunity and Emissions Declaration Immunity Standard IEC Basic Standard IEC 60601-1-2 2001 Electrostatic discharge IEC 61000-4-2 ± 6kVc ± 8kVc RF EMF Immunity IEC 61000-4-3 3/10 V/m 80 MHz-2.5GHz Magnetic field IEC 61000-4-8 3A/m 150kHz-80MHz Emissions Summary The SureTemp® Plus model 690 and 692 thermometers are intended for use in the electromagnetic environment specified below. The customer or the user of the model 690 and 692 should assure that it is used in such an environment.
1. General Information 1.1 About this Manual This manual describes maintenance and troubleshooting procedures for the SureTemp® Plus Model 690 and 692 Thermometers. Most topics and procedures described in this manual are applicable to both products. Where there are differences, it is noted to which product the topic refers. 1.1.1 Related Document End-user operation of the Model 690 and 692 Thermometers is covered in the SureTemp® Plus Model 690 and 692 Operator's Manual PN 71213-0000. 1.
• Use single-use Welch Allyn disposable probe covers to limit patient cross-contamination. The use of any other probe cover may produce temperature measurement errors or result in inaccurate readings. • Do not take a patient’s temperature without using a Welch Allyn disposable probe cover. Doing so can cause patient discomfort, patient cross contamination, and erroneous temperature readings. • Long-term continuous monitoring beyond three to five minutes is not recommended in any mode.
1.5 • The Welch Allyn SureTemp Plus thermometer consists of high quality precision parts. Protect it from severe impact and shock. A qualified service technician must check any SureTemp Plus thermometer which is dropped or damaged to ensure proper operation prior to further use. Do not use the thermometer if you notice any signs of damage to the probe or instrument. Contact the Welch Allyn Customer Service Department for assistance.
2. Operating Characteristics 2.1 Basic System Description The Welch Allyn® SureTemp® Plus Model 690 and 692 thermometers are portable electronic thermistor thermometers. Users can measure a patient's temperature in the oral, axillary, and rectal body sites of adult, pediatric, and newborn patients.
Four probe types are available and interchangeable on the thermometer: 1. A blue Oral/Axillary probe with a short (standard) coiled cord 2. A red Rectal probe with a short (standard) coiled cord 3. A blue Oral/Axillary probe with a long coiled cord 4. A red Rectal probe with a long coiled cord 2.1.3 Probe well This unit has a removable probe well to allow for ease of cleaning and replacement. The blue probe well is used with Oral and Axillary probes, and the red probe well is used with Rectal probes. 2.1.
2.2 Model Features Features of the SureTemp® Plus Thermometer models (690 and 692) are listed below. Table 2-1: Feature differences between Models 690 and 692 Feature Model 692 Probe Cover Storage X X F/C Conversion X X Last Temperature Recall X X Monitor Mode X X Detachable Probe X X Oral/Axillary/Rectal Modes on Each Thermometer X X Color-Coded Removable Probe Well X X Optional Standard Wall-Holder 2.
Immediately following the LCD segment test, the software revision is displayed on the screen for 2 seconds. At the end of the self-test, the display goes blank and the unit is ready to operate. 2.3.3 Low Power Mode The Low Power mode allows the thermometer to conserve power when it is not in use. The unit will automatically enter the Low Power mode following one of these conditions: 1.
2.3.5 Monitor Mode The Monitor mode provides continuous temperature monitoring capability. The recommended wait time for a Monitor mode oral temperature and a Monitor mode rectal temperature is 3 minutes. The recommended wait time for a Monitor mode axillary temperature is 5 minutes. The thermometer will automatically switch to Monitor mode under the following conditions: 1. If 60 seconds have passed since the thermometer was removed from the probe well. 2.
2.3.6 Pulse Timer Mode (Model 692 only) Pulse Timer mode is activated from Low Power or Recall mode by pressing the Pulse Timer button. The display will then count up in seconds, and the unit will emit an audio beep at 0, 15, 30, 45 and 60 seconds. Pulse Timer mode terminates automatically after 60 seconds. The thermometer then returns to Low Power mode. The Pulse Timer can be stopped at any time during the 0-60 count by pressing the Pulse Timer button a second time.
2.3.9 F/C Conversion The temperature switches to F or C scale by pressing and releasing the C/F button. The default temperature scale can be set to F or C in the biotech mode. A temperature must be displayed on the screen to switch between F and C. 2.3.10 Temperature Recall This mode displays the most recently completed predicted temperature.
The following features and selections are available in the Biotech mode. Table 2- 3: Biotech Mode Features Function Setting DEVICE VERSION The display will show “X.X”, where “X.X” is the device software version number (i.e. 1.0). This is helpful when discussing operation with Welch Allyn Customer Care. ALGORITHM VERSION The display should show “X.X” where “X.X” is the mode Software Version (i.e. 7.5). This is helpful when discussing operation with Welch Allyn Customer Care.
2.4 Instrument Security Security options include two different electrical security options that alarms after a user designated number of temperatures is reached or when the unit is removed from the wall holder (Model 692 only). A mechanical security option is also available to prevent removal of the unit from the wall mount or mobile stand without a special tool.
3. Preventive Maintenance The following preventive maintenance is recommended to maximize uninterrupted service with the SureTemp® Plus Model 690 and 692 Thermometers. 3.1 Six-Month Maintenance Units that are in service on a regular basis should have the following preventive maintenance performed every six months: 1. Visually inspect the thermometer for any physical damage that might cause future product failure. 2.
3.4.2 Cleaning The Removable Probe Well • Remove the probe well from the unit. Unplug the latching probe connector to prevent the device from consuming battery power while you are cleaning the probe well. • Clean the inner surface of the probe well by swabbing the surface with a cloth dampened with a mild detergent solution or a 70% isopropyl alcohol, a 10% chlorine bleach solution, or a non-staining disinfectant.
3.6 Calibration Testing Whenever the clinical accuracy of the thermometer is in question, verify the instrument calibration. Your hospital biomedical department should establish a routine schedule for verifying instrument calibration. It is recommended the unit be tested annually. 3.6.1 Cal-Key Verification This method uses a fixed value to verify that the device is calibrated properly. 1. Remove any probe currently connected to the SureTemp® Plus Thermometer. 2.
11. Lift the rubber flap on the Model 9600 Calibration Tester and insert the probe fully into the small hole on top of the tester. 12. Wait two (2) minutes for the probe temperature to fully stabilize. 13. The temperature should read between 105.7ºF/40.9ºC and 106.3ºF/41.3ºC. 3.6.3 Model 9600 Plus Calibration Tester Verification This method is used to verify the calibration of the unit and probe at three set point temperatures 36.0ºC (96.8ºF), 38.5ºC (101.3ºF), 41.0ºC (105.8ºF).
4. Troubleshooting Verify your Biotech Mode settings (page 11) to verify your device is configured properly. If the device accuracy is in question, refer to the Calibration section on page 16. If the above two tests do not help or cannot be done, read through the following to help diagnose the unit. 4.1 Types of Errors Error indications fall into five major categories. 4.1.
4.1.3 Patient Temperature Out of Range Patient Temperature Out of Range errors occur when the patient temperature is above 110.0° F or below 80.0° F. During this error, the entire body (head, torso, and legs) displays by blinking with a solid up or down arrow and a thermometer bulb. 4.1.4 Probe Errors The probe or probe connector can generate errors. Probe errors are displayed as a probe with an X through it and an error code in the temperature field.
4.1.6 Error Codes: Troubleshooting The following table describes the error codes displayed on the thermometer, their corresponding descriptions, and the actions to take to correct the error. If the unit fails to operate properly after completing the suggested procedure listed in the following table, contact Welch Allyn® Customer Care at 1-800-535-6663. Table 4- 2: Error Codes: Troubleshooting Error Code Description Troubleshooting Steps E0.1 Excessive Heater Energy Try another predict cycle.
Table 4- 2: Error Codes: Troubleshooting Error Code Description Troubleshooting Steps E5.2 Heater fail-safe failure. Contact Welch Allyn Customer Care. 23 Host Interface Error Try another predict cycle. If the problem persists contact Welch Allyn Customer Care. 26 Invalid SureTemp mode Try another predict cycle. If the problem persists contact Welch Allyn Customer Care. 29 Battery Voltage Is Not Set Try another predict cycle. If the problem persists contact Welch Allyn Customer Care.
4.2 Field Serviceable Repairs The only operations that are performed by field personnel are calibration verification, probe or probe well replacement, battery replacement, and unit replacement. 4.3 Field Serviceable Parts The following parts are serviceable by qualified technicians. Note: The following parts list is current as of the date of publication. Parts and part numbers may change without notice.
5. Theory of Operation 5.1 Technical Overview The SureTemp® Plus Model 690 and 692 are portable, battery powered thermistor-based medical grade thermometers that perform oral, axillary, and rectal measurements using highspeed prediction modes. The devices perform a power-on self test (POST) when battery power is applied. POST checks the internal hardware, and tests the stored calibration values to verify that the factory calibration is intact.
5.1.1 Temperature Probes Model 690 and 692 Thermometer probes are configured at the factory to be Oral/Axillary or Rectal probe types. The probe contains a thermistor, a heater resistor, and an EEPROM. Table 5- 1: Probe Parts Probe Part Description Thermistor Heat Resistor The Thermistor is used to sense patient temperature. EEPROM During calibration, the I2C SDA line is accessed via the probe connector and SCL by a special probe connection that does not connect to the thermometer.
Appendix A Specifications Ambient Operating Temperature Range 50.0 F to 104.0 F (10.0 C to 40.0C) Operating Altitude -557 ft. to +16,000 ft / -170m to +4877m Patient Temperature Range 80.0 F to 110.0 F (26.7 C to 43.3 C) Temperature Predict Time* Oral: Approximately 4–6 secs. Adult axillary (18 years and older): Approximately 12–15 secs. Pediatric axillary (17 years and younger): Approximately 10–13 secs. Rectal: Approximately 10–13 secs.
Appendix B Limited Warranty THREE-YEAR LIMITED WARRANTY ON MODEL 692 AND TWO-YEAR LIMITED WARRANTY ON MODEL 690 INSTRUMENTS Instrumentation purchased new from Welch Allyn, Inc. (Welch Allyn) is warranted to be free from original defects in material and workmanship under normal use and service for a period of three years for Model 692 and a period of two years for Model 690 from the date of first shipment from Welch Allyn.
4341 State Street Road Skaneateles Falls, NY 13153 Tel: +1 800 535 6663 Fax: +1 315 685 3361 www.welchallyn.
