Technical Manual
1-8 Welch-Allyn, Inc.
If you cannot enter the Biotech mode, refer to
Biotech Mode Problems
in the
Troubleshooting
section.
Function Settings
1. Software Version Observe the display, The display should show “r X.X” where
“X.X” is a number such as 2.3. 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.
2. Default Algorithm
Oral/Axillary Modes
Three settings are available to set the default predictive
algorithm: oral, axillary or last prediction. 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.
3. Battery Voltage This section displays the current battery voltage with 10 mV
resolution. The battery is considered acceptable if it
measures higher than 3.4 volts. New batteries should
produce 4.5 volts or more. Each thermometer is factory
tested for accuracy down to a supply voltage of 2.9 volts. At
3.2 volts, the low battery indicator (battery icon) will flash.
When the battery voltage is 3.0 volts or less, the low battery
indicator will display without flashing. Three double beeps
are generated, followed by a blank display. At this point
temperature taking is disallowed.
4. Predictive Temperature
Counter
This section displays the count of the number of predictive
temperature actuations that have occurred since last cleared
(in 100’s). Replacing the batteries will clear the counter. The
power-up setting is 0.
5. Anti-Theft Temperature
Counter System
(Model 678 only)
The user can select the anti-theft time out based upon a
predictive temperature counter that can be set as 0, 25, 50,
100 and 200 (0=disabled).
•
The unit will not function when the predictive temperature
counter has reached the user set parameter. The unit will
display a warning consisting of a digit representing the
last 5 counts (i.e. 5,4,...1,) and will display “SEC” on the
LCD for five seconds when the probe is returned to the
storage channel after the temperature is complete or
after 30 seconds with the final temperature displayed.
•
When the unit enters the alarm state, it will double beep
for approximately 10 seconds and display “SEC” on the
LCD. This function is deactivated at power-up.