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Listed below are a number of the TM's for the M series trucks. This warranty shall be fulfilled by Welch Allyn or its authorized representative repairing or replacing at Welch Allyn's discretion, any such defect, free of charge for parts and labor. Welch Allyn should be notified via telephone of any defective product and the item should be immediately returned, securely packaged and postage prepaid to Welch Allyn.
Loss or damage in shipment shall be at 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 authorized Welch Allyn Service Representative, 3 has been altered, or 4 has been used in a manner other than in accordance with instructions. The information in this manual has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for inaccuracies.
Furthermore, this information does not convey to the purchaser of Welch Allyn or Diatek devices any license under the patent rights to the manufacturer. Page 9 1. The bulk of the discussion is equally applicable to both products. Where there are differences, it will be noted as to which instrument the discussion applies. The Welch Allyn Model and Thermometers are the next generation of thermistor based medical grade thermometers providing the accuracy and ease of use of thermistor technology as in the well known Model The Model and Model provide a Normal mode oral temperature in about 4 seconds, significantly faster than the typical second average time to temperature in earlier products.
Note: There are many things that can be done to check operation before the unit is disassembled. This section will cover these normal operating actions. Basic System Description The thermometer system consists of five main components: The batteries, the thermometer instrument, the wall mount, the probe and the probe cover. Probe cover box Display Timer button only Mode button Probe cover ejection button 6. These batteries are readily available and provide long life for reduced down time.
No battery charging is required. Note: The use of Ni-Cad rechargeable batteries is allowed. The nominal cell voltage of 1. Instrument The main instrument operates very similarly to the Model Basic operation has been kept similar to that of the Model to ease learning and use. Wall Mount The wall holder is easily secured to a wall or rolling stand. An optional locking mechanism with a removable key for securing the instrument is available.
Through the use of available long probe cords, the thermometer can be used without removing it from the wall holder. Probe The probe is similar to earlier probes. Probe Covers The probe covers are unchanged from previous models and are compatible across all Welch Allyn and Diatek thermistor based thermometers.
However, resetting the electronics is the recommended starting point in the checkout process. The batteries must be removed from the instrument to reset the internal microprocessor electronics.
Follow the battery removal instructions in the Preventive Maintenance section. Caution: After battery removal, any remaining charge due to internal capacitance must be discharged to achieve a proper reset.
After the batteries are out, press the Mode or Timer button for about 5 seconds. The electronics will now properly reset upon new battery installation.
Remove the probe from the probe storage well and unplug the probe connector from the instrument by depressing the locking tab and pulling on the connector body. Do not pull on the cord. While watching the display, install the batteries per the instructions in the Preventive Maintenance section and observe the power up self test.
The self test includes several internal microprocessor self tests, instrument electronics tests and the display test. Refer to the Error Codes in the Troubleshooting section for an explanation. Display Test The display test begins with each display segment and icon being individually lit in brief and rapid succession.
Immediately after this, all display segments and icons are simultaneously illuminated briefly followed by a display of the software revision in this instrument. At the end of the test, the display goes blank. Figure 2 - M Display Note: If a probe is installed during this power up time, the probe type will be displayed as the last item before the display blanks.
At this point, there should be no probe connected to the instrument. If there is no display, any missing segments, or no beeper, refer to the Troubleshooting section.
With a properly functioning instrument, the probe can be run through the self test. If the instrument is functioning properly and a probe is installed, the instrument will initiate the probe warmer self test during the instrument reset self test and whenever a probe is plugged in.
For Models and , the probe type will display for approximately 2 seconds. Do not withdraw the probe during this self test. Note: Handle the probe only by the probe handle, not the metal shaft. When removing a probe, disconnect the connector by pressing the locking tab and pulling on the connector body. Do not pull it by the cord. If there are any problems with probe initialization, refer to the Troubleshooting section. Battery Life Under normal use, battery life is expected to provide approximately 5, temperature measurements.
This number is based on a Colder ambient temperatures, excessive security alarms, use of non-alkaline batteries, and other usage patterns can reduce battery life. Instruments are shipped with fresh batteries, but we cannot guarantee full life from the first set of batteries due to potential long storage times between shipping and actual use. Battery life can also be reduced by storage at elevated temperatures.
If you are experiencing short battery life, refer to Battery Life Problems in the Troubleshooting section. Page 13 Operational Characteristics Normal Mode After instrument and probe warmer self tests, the system is ready for use. Normal mode operation is the rapid mode of temperature taking. This is the default mode and is automatically selected when the probe is withdrawn from the probe well.
Upon withdrawal of the probe from its storage well, every segment on the display will be illuminated. This display might take several seconds to appear. At the same time that the probe type is displayed, a short beep will sound. At this point, load a probe cover and take a temperature. To change between the Oral and the Axillary algorithms; place the instrument in Ready mode as described above, and press the Mode button for approximately two seconds.
This is acceptable operation and will not adversely effect the temperature taken. The instrument will beep to signal completion of the Normal mode temperature cycle.
Note: The thermometer reads the probe temperature immediately upon removal from the storage well. If the probe was just placed into the storage well from a previous temperature and immediately extracted, insufficient time may have passed to allow the probe to cool to room temperature.
This will result in the instrument determining room temperature to be higher than actual. This could result in the instrument switching to Monitor mode immediately if it detects room temperature to be above For best results, the user should wait at least 30 seconds between Normal mode temperatures.
If the probe is left out of the storage well after completion of a Normal mode temperature, the unit will shut down after 30 seconds to conserve power. Simply replace the probe in the storage well to prepare for the next temperature. This mode will be indicated on the display by a capital M in the bottom right corner. Monitor mode provides a direct readout of the probe temperature.
Unlike Predictive mode, Monitor mode will follow a temperature as it rises or falls. The typical slow rise in temperature when Monitor mode is used is due mainly to the mouth temperature slowly recovering from placement of the colder room temperature probe. The probe itself is actually very fast at rising to the temperature of its surroundings, usually within a few seconds. Because of this slow mouth recovery, the recommended time to wait before recording a Monitor mode oral temperature is 3 minutes.
Similarly, the recommended waiting period for an axillary temperature taken in Monitor mode is 5 minutes. Note: The instrument will shut off automatically if the probe temperature remains below If Monitor mode does not display expected temperatures or exhibits other problems, refer to the Troubleshooting section. Whenever the unit enters the Pulse Timer mode, it will emit an audio beep at 0, 15, 30, 45 and 60 seconds.
Pulse timer mode will be terminated automatically upon completion of a 60 second count and go back to low-power mode. The pulse timer can be shut off at anytime during the count by pressing the Timer button, the Mode button or removing the probe from the probe holder.
If the timer does not work or exhibits other problems, refer to Timer Problems in the Troubleshooting section. Backlight Model only The backlight is turned on automatically in any mode except Low Power. Once the backlight is turned on, it will automatically shut off whenever the instrument goes into Low Power mode.
The LCD is backlit such that all readings are clearly readable in a darkened room from a distance of 18 inches. If the backlight does not work or is showing other problems refer to the Backlight Problems section in the Troubleshooting section. This can also be changed during display.
If pressing the Mode button does not change the scale of the displayed temperature, refer to Mode Button Problems in the Troubleshooting section. Temperature Recall Whenever the instrument is in Low Power or Pulse Timer mode, pressing and releasing the Mode button will cause the most recent predicted temperature to be displayed for 5 seconds.
Pressing the Pulse Timer button will interrupt the temperature recall function. Note: No Monitor temperatures will be saved for recall. When a temperature is recalled, the mode in which it was obtained axillary, oral or rectal will be shown independent of the present mode. If the last temperature can not be recalled, refer to Temperature Recall Problems in the Troubleshooting section.
Biotech Mode To enter this special program mode: 1. Place the thermometer in the wall holder. Press and hold the Mode button, and at the same time remove the probe from the probe well. Press the Mode button approximately 2 seconds to move sequentially through the various program categories. Changes within each category can be made by momentarily pressing and releasing the Mode button.
Upon entering the Biotech mode, the following features and selections become available. A number is provided in the flag area to indicate which Biotech category is displayed. Replacing the probe into the probe holder returns the unit to normal operation. The Biotech mode will automatically time out after 5 minutes of inactivity. Function Settings 1. This can be helpful when discussing operation with Welch Allyn customer support.
Press the Mode button for more than two seconds to advance to the Default Algorithm. To change the default algorithm, momentarily press the Mode button to advance to the next algorithm. The instrument will be placed in the selected algorithm after the probe has been returned to the probe well.
When replacing the batteries, the power-up setting is the oral predictive algorithm. Press the Mode button for more than two seconds to advance to the Battery Voltage. Battery Voltage This section displays the current battery voltage with 10 mV resolution.
The battery is considered acceptable if it measures higher than 3. New batteries should produce 4. Each thermometer is factory tested for accuracy down to a supply voltage of 2.
When the battery voltage is 3. Three double beeps are generated, followed by a blank display. At this point temperature taking is disallowed. Replacing the batteries will clear the counter.
The power-up setting is 0. The unit will display a warning consisting of a digit representing the last 5 counts i. This function is deactivated at power-up. Welch-Allyn, Inc. Page 17 Operational Characteristics 6. Instant Anti-Theft Audio Alarm System Model only The user can select an anti-theft option that instructs the instrument to beep continuously beginning after approximately 5 seconds whenever the unit is removed from the wall holder.
Note: At power-up, this mode is deactivated. Error Log Function 5 in the Model The instrument will save the last 10 error messages that occur and display those messages in a last in first viewed sequence.
While in error log, the display reads E x. To display the next error, momentarily press the mode button. Note: Battery removal will clear the error log of all error messages. Page 19 2. Units which are in service on a regular basis should have the following preventive maintenance performed every 6 months: 1. Visually inspect the thermometer for physical damage which might cause future product failure. Units which are stored for an extended period and not used should have the following performed every 12 months: 1.
Replace the batteries according to the procedures found in the Directions for Use manual. Cleaning and Sterilization Routine Cleaning Clean the exterior of both the Model or Model instrument, the wall mount and the probe as needed. Care should be taken to not scratch the LCD faceplate.
Make sure that the cloth is damp, but not too wet. Never immerse the thermometer into the cleaning solution. Never autoclave the thermometer or probe. ETO Gas Sterilization Procedure When no other form of decontamination such as a germicidal wipe is acceptable, a low temperature not to exceed Ensure that the probe is removed from its storage well and disconnected from the instrument.
Remove the batteries following the instructions in the Battery Removal and Replacement section below. Wrap the thermometer in a standard sterilization type packaging such as the Baxter Tower Dualpeel Sterilization Pouch. ETO gas sterilize at a temperature not to exceed Remove the sterilization packaging. Before installing the batteries and probe, allow the probe and instrument to stabilize to room temperature for at least one hour.
Reinstall the batteries see Battery Removal and Replacement below and verify a successful self test. Install the probe connector and insert the probe into the storage well to start the probe initialization process. Verify proper calibration of the thermometer and probe using the Welch Allyn Model Calibration Tester. Battery Removal and Replacement 1. Using a flat surface, lay the thermometer on its front panel.
Remove the batteries by pulling on the ribbon located under them. Press either the Mode or the Timer button for approximately five seconds to discharge the electronics. Verify that the thermometer completes self-test, then goes blank.
Page 21 3. Calibration Key Procedure 1. Extract the probe and disconnect it from the thermometer. Insert the Calibration Key part number into the probe connector receptacle on the thermometer and observe the display.
The display should read CAL for two seconds, and then go blank. Insert a probe shaft into the probe storage well and remove it to initiate a temperature taking cycle. Remove the Calibration Key and reinstall the probe connector plug. Then install the probe into the probe storage well.
If the reading from the Cal Key is not within the specified range or you are having other problems with the use of the Cal Key, refer to Cal Key Problems in the Troubleshooting section. Model Calibration Testing Procedure The Model Calibration Tester provides a convenient means of testing the entire thermometer system instrument and probe. The probe is inserted into the small hole in the dry heat well of the and allowed to settle for a minimum of 2 minutes to the final temperature.
The reading on the thermometer must be within the range specified on the Refer to the Model Operation Manual for complete instructions. Note: All Welch Allyn and Diatek thermometers thermistor and infrared ear thermometers can be checked in the Model If you are having problems with the use of the Model , refer to the Troubleshooting section in the Model Operation Manual.
Page 23 4. These pulse widths are measured by the microprocessor, which calculates the probe resistance. The actual probe temperature is then calculated from the probe resistance. This allows the oral temperature-taking to be as fast as possible by using different operating modes based on probe type. Axillary temperatures are measured with oral probes in combination with the axillary mode, providing a temperature reading in about 15 seconds.
Rectal probes give a Normal mode temperature in about 15 seconds for both models. Probe type recognition also allows the use of minor differences in prediction parameters tailored to the temperature taking site to help increase speed over previous products.
The probe type is communicated to the thermometer by the use of shorting jumpers between the ground and two of the probe connector contacts. Probe Switch The probe switch S4 is activated by the probe shaft when the probe is installed or removed from its storage well. Placing the probe into the storage well pulls processor pin 15 high via R6. This signal is also routed to test connector J4 pin 5 to allow automated testing of this function during factory test.
R6 allows this line to be pulled high or low at J4 during factory test regardless of the actual switch position. OFF to warm the probe quickly. This reduction to zero and the probe being at least up to Page 25 Theory of Operation The shape of the rising temperature curve is monitored and the best fit to a curve is found.
Rectal temperature measurements will take about 15 seconds. This provides a maximum supply voltage of about 4. Power is drawn from the three AA alkaline cells directly to the circuit electronics. The voltage from the batteries is unregulated but filtered by capacitor C
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