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HOW TO SWITCH FROM TO (FROM TO ).
1. In power-off mode, press and hold the
START
button for 6
seconds. When
starts fl ashing, release the button.
2. Press the
START
button again to switch from to .
3. Wait until the CTD504 automatically shuts off and restarts. It
is now ready to use.
RECALL MEMORY
1. In power-off mode, press and release the
START
button to
enter Memory Recall Mode. Press the
START
button again.
The LCD screen displays the fi rst memory set number with
the latest measuring result.
2. Press the
START
button repeatedly to scroll through all 12
stored results in a loop.
ERASE MEMORY
1. While holding the
START
button, press and release the
|
/O
button. The
CTD504 starts up.
2. When the LCD displays the previous measuring result, release the
START
button.
3. To check memory erasing, turn the CTD504 off, and enter Memory Recall Mode
again.
BATTERY REPLACEMENT
• fl ashes: You can still measure, but the accuracy may not impaired.
•
lights or no reaction at all: Change the battery as soon as possible.
Note: Change the battery away from small children and any source of heat.
1. Press the upper part of the battery cap to unlock it.
2. Insert the tip of a tool into the gap at the side of the battery
compartment. Remove the worn-out battery.
3. Insert a new CR2032 lithium battery into the CTD504,
according to the polarities in the fi gure. Push it fi rmly into
place with a “click”, then replace the cap.
12. Without regular recalibration, the results may not be accurate. Every CTD504 is
calibrated right after production. See “Warranty and Recalibration” for details.
13. Keep the CTD504 away from sunlight and dusty places.
Important Notice:
The CTD504 does not require a probe cover during use. It is important to
clean and disinfect the CTD504 before and after each use. See “Cleaning and
Disinfection” for details.
For measurement:
• When asleep, pressure on the ear may cause higher-than-normal temperature.
Wait a few minutes, and then measure again.
• Clean your external ear before measuring. To ensure an accurate result, keep
your ear free from obstructions or excess earwax.
• The measuring results from the left and right ears may differ slightly. We
recommend measuring in the same ear.
• Before measuring, the user and the CTD504 should be in a steady room
temperature for at least 30 minutes. The user should also rest for 30 minutes
after exercising.
HOW TO OPERATE
1. Press the
|
/O
button. The LCD screen displays all digital
segments.
2. If the CTD504 has saved past results, the LCD screen
automatically displays the latest result.
3. When
or fl ashes with a short beep, the CTD504 is ready to use.
1. To improve accuracy, follow the illustrations below. For adults, pull the ear up
and back. For infants and children, pull the ear back.
Adults
Infants and Children
2. Fit the probe tip into the ear canal, and then press the
START
button. Release the button and wait a few seconds
until you hear a long beep.
3. Take the CTD504 out of the ear canal. The LCD displays the
latest measuring result. Without any operation, the CTD504 automatically
shuts off after 1 minute.
Note: Before re-measurement, wait 1 – 3 minutes.