Holtek BMH08004 User manual

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BMH08004 Operation Guide
V1.3
BMH08004 Operation Guide
Contents
1Power on/off.............................................................................................................................2
2Power-on Display.......................................................................................................................2
3Finger Detection Display ...........................................................................................................2
4Switch the Display Style of Readings.........................................................................................2
5Setting the Menu Parameters ...................................................................................................3
5.1 Switch the menu page...................................................................................................3
5.2 Set parameters..............................................................................................................3
5.3 Exit the menu................................................................................................................3
5.4 Brightness adjustment ..................................................................................................3
5.5 Set alarm (Alm)..............................................................................................................3
5.6 Set beep sound (Beep)..................................................................................................4
5.7 Set the lower limit of the blood oxygen alarm..............................................................4
5.8 Set the upper/lower limit of the heart rate alarm........................................................4
5.9 Set parameter value to increase/decrease (“+/-”)........................................................5
5.10 Restore to factory default .............................................................................................5
6The display when sensor is abnormal.......................................................................................5
7Battery indicator .......................................................................................................................5
8Operating Current.....................................................................................................................5
9Shutdown current .....................................................................................................................6
10 Specifications ............................................................................................................................6

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BMH08004 Operation Guide
V1.3
The BMH08004 is an evaluation kit of the HT66F4560 MCU. Its function is pulse oximeter with
OLED display.
1Power on/off
Power on: press button
Power off: there is no power off button, this product will shut down automatically within 10
seconds after the finger leaves.
2Power-on Display
UI 1: UI 2:
3Finger Detection Display
UI 1:
UI 2:
4Switch the Display Style of Readings
UI 1:

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BMH08004 Operation Guide
V1.3
UI 2:
The BMH08004 provides two display styles for readings, choose according to your needs.
Short press “ ” to switch the display from left to right in turn.
5Setting the Menu Parameters
Long press “ ” to enter the setting menu.
Menu page 1 Menu page 2
5.1 Switch the menu page
Short press to move up/down, check the second item, long press to switch the menu
page.
5.2 Set parameters
Short press to move up/down, select the corresponding parameter, long press to set
the parameter.
5.3 Exit the menu
Short press to move up/down, check “Exit”, long press to exit the setting mode.
5.4 Brightness adjustment
The backlight brightness adjustment is divided into 5 levels, long press to adjust in turn.
5.5 Set alarm (Alm)
Short press to move to “Alm”, long press to switch on/off.

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BMH08004 Operation Guide
V1.3
ON state: the alarm voice is turned on, there will be a tick voice if the blood oxygen and pulse rate
exceed the range, and the value out of the range will flash once per second. There will be no flash
if the value does not exceed the range.
OFF state: the alarm voice is turned off, there will be no tick voice if the blood oxygen and pulse
rate exceed the range. The value out of the range will flash once per second. There will be no flash
if the value does not exceed the range.
5.6 Set beep sound (Beep)
Short press to move to “Beep”, long press to switch on/off.
ON state: The heartbeat alert tone is turned on. During the measurement, each heartbeat will be
heard with one beep sound, and the sound will be synchronized with the pulse rate.
-When both the alarm (Alm) and the beep sound (Beep) are turned on, if the blood oxygen and
pulse rate measurement values exceed the range, the pulse rate beeps will disappear, only the
tick alarm sound and the flash of the out-of-range values.
-When the alarm (Alm) is off and the beep sound (Beep) is on, if the blood oxygen and pulse
rate measurement values exceed the range, there will be no tick alarm sound, only the beep
sound and the flash of the out-of-range values.
OFF state: the beep sound is turned off.
5.7 Set the lower limit of the blood oxygen alarm
Short press to move to “SpO2 Lo”, long press , the setting value increases or decreases
by 1 unit. To decide whether the setting value is increased or decreased is by setting the “+/-“ to
be “+” or “-”.
Setting range: 70 – 99.
5.8 Set the upper/lower limit of the heart rate alarm
Short press to move to “PR Hi” to set the heart rate alarm upper limit, or move to “PR Lo” to
set the heart rate alarm lower limit, long press , the setting value increases or decreases by 5
unit. To decide whether the setting value is increased or decreased is by setting the “+/-“ to be “+”
or “-”.
Setting range: 25 – 250.
The“PR Hi”value is the maximum limit of“PR Lo”value.
The“PR Lo”value is the minimum limit of“PR Hi”value.
For example, when the “PR Hi”value is 130, the“PR Lo”value can be adjusted up to 130, and
cannot be adjusted upwards. When the “PR Lo”value is 50, the“PR Hi”value can be adjusted
down to 50, and cannot be adjusted further down.

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BMH08004 Operation Guide
V1.3
5.9 Set parameter value to increase/decrease (“+/-”)
Short press to move to “+/-”, long press to switch increase (+) or decrease (-).
5.10 Restore to factory default
When any parameter of the menu item is adjusted, there will be no “on” in the “Restore” row.
Short press to move to “Restore”, long press to restore to factory default. The “on” will
appear in the “Restore” row.
The factory default settings are:
6The display when sensor is abnormal
When Sensor error is displayed, it means that the sensor is abnormal, which may be caused by
poor soldering of the transmitting tube or receiving tube.
7Battery indicator
>2.6V full battery, 3 icons.
2.4V - 2.6V 2 icons
2.2V - 2.4V 1 icon
<2.2V turned off after flashing 2 seconds
8Operating Current
When battery voltage > 2.8V, the operating current is ≤ 40mA
When battery voltage < 2.8V, the operating current is ≤ 70mA

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BMH08004 Operation Guide
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9Shutdown current
The shutdown current is ≤5uA
10 Specifications
Parameter
Value
Display
range
Blood oxygen
saturation
35%～100%
Pulse rate
25bpm～250bpm
PI
0.1%～20%
Resolution
Blood oxygen
saturation
1%
Pulse rate
1bpm
PI
0.1%
Accuracy
Blood oxygen
saturation
±2%（70%～100%）
Not requested（≤69%）
Pulse rate
±2bpm or ±2% whichever is the largest
(in room temperature: ±1bpm or ±1% whichever
is the largest.)
PI
0.1%～2% : ±0.2%
2%～20%：±1%
Preset range
Blood oxygen
saturation
70%～99%
Pulse rate
Upper limit：25bpm～250bpm
Lower limit：25bpm～250bpm
Accuracy
when in
weak PI
Weak perfusion
index
When ≥ 0.5%, meet the accuracy requirements