Welch Allyn SureTemp Plus 692 Series Service Manual
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Welch Allyn SureTemp Plus 692 Series Service Manual

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  • Page 1 Service Manual ® SureTemp Plus 690 and 692 Series...
  • Page 2 © 2018 Welch Allyn, Inc. To support the intended use of the product described in this publication, the purchaser of the product is permitted to copy this publication, for internal distribution only, from the media provided by Welch Allyn. Welch Allyn assumes no responsibility for any injury, or for any illegal or improper use of the product, that may result from failure to use this product in accordance with the instructions, cautions, warnings, or indications for use published in this manual.

  • Page 3: Table Of Contents

    Table of Contents General Information ............1 1.1 About this Manual .

  • Page 5: General Information

    The use of any other probe cover may produce temperature measurement errors or result in inaccurate readings. WARNING: 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.
  • Page 6 WARNING: 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.

  • Page 7: Conforms With

    Symbols and descriptions Consult directions for use (DFU). A copy of the DFU is available on this website. A printed copy of the DFU can be ordered from Welch Allyn for delivery within 7 calendar days. Type BF Applied Part...
  • Page 8 Product Identifier Separate collection of Electrical and Electronic Equipment. Do not dis- pose as unsorted municipal waste. Global Trade Item Number Meets essential requirements of European Medical Device Directive 93/ 42/EEC Intertek Testing Laboratories Approved (ETL) Manufacturer Serial Number...

  • Page 9: Operating Characteristics

    2. Operating Characteristics 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.
  • Page 10 The SureTemp Plus Thermometers must use the standard Welch Allyn thermistor probe ® covers. The probe covers are compatible across all Welch Allyn thermistor-based thermometers. 2.1.5 Batteries The Model 690 and 692 thermometers use three AA batteries. No battery charging is available.

  • Page 11: Model Features

    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 690 Model 692 Probe Cover Storage F/C Conversion Last Temperature Recall Monitor Mode Detachable Probe Oral/Axillary/Rectal Modes on Each Thermometer...
  • Page 12 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.
  • Page 13 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.
  • Page 14 2.3.6 Pulse Timer/ Monitor 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.
  • Page 15 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.
  • Page 16 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 The display should show “X.X” where “X.X” is the mode VERSION Software Version (i.e.

  • Page 17: Instrument Security

    ERROR LOG This setting displays the last 10 saved error messages in a last-in, first-viewed sequence. This is helpful when discussing operation with Welch Allyn Customer Care. If there are no error messages, the display shows EMPTY LOG. CLEAR LOG This setting appears if the thermometer has logged any error messages.
  • Page 18 Selection button while removing the probe from the probe well, within 30 seconds of the instruments removal from the wall holder, clears the alarm and allows the instrument to operate. Returning the instrument to the wall holder will reset the instant audio alarm. The options for the Instant-On feature are ON and OFF.

  • Page 19: Preventive Maintenance

    3. Preventive Maintenance The following preventive maintenance is recommended to maximize uninterrupted service ® with the SureTemp Plus Model 690 and 692 Thermometers. Six-Month Maintenance Units that are in service on a regular basis should have the following preventive maintenance performed every six months: 1.

  • Page 20: Replacing The Batteries

    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 1:10 sodium hypochlorite (bleach) solution or isopropyl alcohol solution as the active disinfection ingredient.

  • Page 21: Calibration Testing

    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.
  • Page 22 6. Wait for approximately one minute or until temperature on the thermometer is stable for ten seconds. Compare the thermometer’s temperature reading to the 9600 Plus’ calibration set point temperature. If the temperatures are within + 0.1ºC (+ 0.2ºF), the thermometer is within calibration.

  • Page 23: Troubleshooting

    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 starting on page 17. If the above two tests do not help or cannot be done, read through the following to help diagnose the unit.
  • Page 24 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.
  • Page 25 Description Troubleshooting Steps E0.1 Excessive Heater Energy Try another predict cycle. If the problem persists replace the probe or contact Welch Allyn Customer Care. E0.2 A/D Measurement out of Make sure the temperature is within range error. the operating range of 50ºF/10ºC and 104ºF/40ºC...
  • Page 26 Try another cycle. properly. If the problem persists contact Welch Allyn Customer Care. E5.2 Heater fail-safe failure. Contact Welch Allyn Customer Care. Host Interface Error Try another predict cycle. If the problem persists contact Welch Allyn Customer Care. Invalid SureTemp mode Try another predict cycle.
  • Page 27 50ºF/10ºC and 110ºF/43.3ºC and allow the thermometer to stabilize to ambient temperature. If problem persists replace the probe or contact Welch Allyn Customer Care. Ambient temperature too Move into an area where the low. temperature is between 50ºF/10ºC and 110ºF/43.3ºC.

  • Page 28: Field Serviceable Repairs

    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. 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 ®...

  • Page 29: Theory Of Operation

    5. Theory of Operation 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 high- speed 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.
  • Page 30 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 The Thermistor is used to sense patient temperature.

  • Page 31: Appendix A Specifications

    Appendix A Specifications 50.0 F to 104.0 F (10.0 C to 40.0C) Ambient Operating Temperature Range Operating Altitude -557 ft. to +16,000 ft / -170m to +4877m 80.0 F to 110.0 F (26.7 C to 43.3 C) Patient Temperature Range Temperature Predict Time* Oral: Approximately 4–6 secs.

  • Page 32: Appendix B Limited Warranty

    Welch Allyn. Loss or damage in shipment shall be at the purchaser’s risk. Welch Allyn will not be responsible for loss associated with the use of any Welch Allyn product that (1) has had the serial number defaced, (2) has been repaired by anyone other than an...

  • Page 33: Appendix C Guidance And Manufacturer's Declaration

    This device complies with IEC EN 60601-1-2:2014. • All medical electrical equipment must be installed and put into service in accordance with the EMC information provided in this document and the Welch Allyn SureTemp Plus Directions for Use. •...
  • Page 34 Electromagnetic Emissions The Welch Allyn SureTemp Plus is intended for use in the electromagnetic environment specified below. The customer or the user of the Welch Allyn thermometer should assure that it is used in such an environ- ment. Emissions Test...
  • Page 35 Electromagnetic Immunity The Welch Allyn SureTemp Plus is intended for use in the electromagnetic environment specified below. The customer or user of the Welch Allyn thermometer should assure that it is used in such an environ- ment. IEC 60601 Test...
  • Page 36 Power frequency (50/60Hz) mag- Power frequency magnetic fields should be at netic field 30 A/m 30 A/m levels characteristic of a typical location in a typical commercial or hospital environment. IEC 61000-4-8 Note: U is the a.c. mains voltage prior to application of the test level. Sure Temp®...
  • Page 37 Electromagnetic Immunity The Welch Allyn SureTemp Plus is intended for use in the electromagnetic environment specified below. The customer or user of the Welch Allyn thermometer should assure that it is used in such an environ- ment. IEC 60601 Immunity...
  • Page 38 The device is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of the Welch Allyn thermometer can help prevent electromagnetic inter- ference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the device as recommended below, according to the maximum output power of the communications equipment.
  • Page 40 4341 State Street Road Skaneateles Falls, NY 13153 Tel: +1 800 535 6663 Fax: +1 315 685 3361 www.welchallyn.com...

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