HT7510 datasheet(6/8 Pages) HOLTEK

6 / 8 page

Functional Description

The following description is for HT7510 only.

• Power switch: press switch to turn the power

on or off.

• When power is on: press the switch, then it will

generate a “beep” sound for 0.125 sec.

a. Displays all the segments first for 2 sec.

b. After a. shows the temperature of the last

reading for 2 sec.

c. After b. shows L

°C (or °F ) for 0.75 sec.

d. After c. displays the measurement tem-

perature, the

°C (or °F) mark will flash at a

speed of 1Hz.

e. If the temperature < 32

°C (or 90 °F), the

display shows L

°C (or °F).

f. If the temperature

≥ 42 °C (or 108 °F), the

display shows H

°C (or °F).

g. The display always show the higher tem-

perature during the measurement.

h. If the measured temperature does not

change for more than 16 sec, the measure-

ment is over and the

°C (or °F) mark flash

stops.

i. When measurement is over, if the tempera-

ture > 37.5

°C (or 99.5 °F),the buzzer alarms

“Beep-Beep-Beep---Beep-Beep-Beep---”

for

4 sec, as follows:

if the temperature

≤ 37.5 °C (or 99.5 °F),

the buzzer alarms “Beep-Beep-Beep-Beep-

” for 4 sec, as follows:

j. If the measurement is over 8 min. 40 sec.

the power will automatically turn off

k. When the measurement is over and the

temperature rises within 8 min. 40 sec, the

°C (or °F) mark will flash again (repeat

from step 2-d), and starts to count again

until 8 min. 40 sec.

l. When beep sound is on for 4 sec, the tem-

perature is not measured.

• When power is off: the standby current ≤ 1µA.

• The frequency of the buzzer is 5.3kHz

• Bonding option: °C or °F.

• Measurement to 0.1 degree in either °C or °F.

• Sensor use 503ET.

• Reference resistor value (sensor in 37.0 °C)

• When battery voltage is low, the battery mark

“

∇” flashes at a speed of 1 Hz and the meas-

urement may not be accurate. The low voltage

detect: 2.4V

± 0.05V.

• During the process of mass production, in or-

der to adjust the reference resistance (RF), let

test 2 be floating, the measured temperature

will be the actual temperature of the meas-

ured environment. It can be up or down, not

always the higher one.

Selection table for clinical thermometer

Part No.

Voice Language

HT84018-0D

English

HT7510

10th Feb ’99

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