Technical Manual
SureTemp
®
Model 670/SureTemp 4
®
Model 675 7
immediately if it detects room temperature to be above 33.9
°
C (93.0
°
F). For best results, the user should
wait at least 30 seconds between Normal mode temperatures.
With correct use, the patient’s temperature will be displayed in about 10 seconds for Model 670 and 4
seconds for Model 675. The instrument will beep to signal completion of the Normal mode temperature
cycle.
If the probe is left out of the storage channel after completion of a Normal mode temperature, the unit will
shut down after 5 minutes to conserve power. Simply replace the probe into the storage channel to prepare
for the next temperature.
Monitor Mode
The instrument can be switched to Monitor mode at any time by using the slide switch on the top right of the
unit. 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.
This mode of operation provides the ability to provide long term monitoring of a patient’s temperature.
Unlike a glass thermometer which is only peak reading, 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 thus drawing it down. 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, 3 minutes is the recommended time to wait before recording a Monitor
mode temperature.
Monitor mode is also useful in testing the accuracy of the combined probe/instrument system when the
probe can be warmed to a known temperature, as with a Welch Allyn Model 9600 Calibration Tester or in a
water bath.
Note:
The instrument will shut off automatically if the probe temperature remains below 28.9
°
C (84.0
°
F) for
more than 5 minutes.
If Monitor mode does not display expected temperatures or exhibits other problems, refer to the
Troubleshooting
section on page 22.
Pulse Timer
The pulse timer provides a 30 second timer for general purpose use. This timer runs independently of other
thermometer functions and can be started and stopped at any time by pressing the Timer push-button.
If the timer does not work or exhibits other problems, refer to the
Timer Problems
section in the
Troubleshooting
section.
Backlight/Temperature Recall
The backlight and temperature recall features are combined into one push-button.
The backlight provides a dim display light for use in dark rooms. It is usually not visible in well lit areas.
Shadowing the display with your hand is an effective way to see backlight operation. With the probe in the
storage channel, a momentary press of the backlight/recall button turns on the backlight and the last
temperature reading for 5 seconds. With the probe out of the storage channel, pressing the backlight/recall
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