American Diagnostic Corporation (ADC) 421 Adtemp - Manual (Page 5)

For an infant, it is best to have the child laying flat with his head sideways so the ear •
is facing upwards. For an older child or adult, it is best to stand behind and slightly
to the side of the patient.
Always take the temperature in the same ear, since the temperature readings may be •
different from the right ear and left ear.
Wait for a few minutes to take the ear temperature after sleeping. •
In the following situations it is recommended that three temperatures in the same ear •
be taken and the highest one taken as the reading:
1. Newborn infants in the first 100 days.
2. Children under three years of age with a compromised immune system and for
whom the presence or absence of fever is critical.
3. When the user is learning how to use the thermometer for the first time until
he/she has familiarized himself/herself with the instrument and obtains consistent readings.
6. Fahrenheit to Celsius switchable
This thermometer can display temperature measurements in either Fahrenheit or Celsius.
To switch the display between °F and °C, simply turn OFF the unit, press and hold the
START button for 5 seconds. When you stop pressing the START button after 5 seconds,
the current measurement scale (°F or °C icon) will be flashed on the display. Toggle the
measurement scale between °F and °C by pressing the START button again. When the
measurement scale has been chosen, wait for 5 seconds and the unit will enter the ready for
measuring mode automatically.
7. How to recall 12 readings in Memory Mode
This thermometer can recall the last 12 readings.
Memory Mode: Press the START button to enter Memory mode when power is off. •
The memory icon M flashes.
Reading 1 - the last reading: Press and release the START button to recall the last •
reading. Display 1along with memory icon.
Reading 12 - reading in succession: Press and release the START button consecu- •
tively to recall readings in succession, up to the last 12 readings.
Pressing and releasing the START button after the last 12 readings have been recalled •
will resume the above sequence from reading 1.
8. Error Messages
Measured temperature too high: Displays H when measured temperature higher than •
212.0 °F or 100.0 °C.
Measured temperature too low: Displays L when measured temperature is lower than •
32.0 °F or 0 °C.
Ambient temperature too high: Displays H in conjunction with the s when ambient •
temperature is higher than 104.0 °F (40.0 °C).
Ambient temperature too low: Displays L in conjunction with the t when ambient tem- •
perature is lower than 41.0 °F (5.0 °C).
Error function display: When system has malfunction. •