1. ບົດແນະນຳ
The HoldPeak HP-881D Digital LUX Meter is a precision instrument designed for measuring illuminance in various environments. It features a highly sensitive, long-life silicon diode sensor and offers a wide measurement range with high accuracy. This manual provides essential information for the safe and effective use of your device.

Figure 1: HoldPeak HP-881D Digital LUX Meter
2. ເນື້ອໃນຊຸດ
ເມື່ອເປີດຊຸດຂອງທ່ານ, ກະລຸນາກວດສອບວ່າທຸກລາຍການທີ່ລະບຸໄວ້ຂ້າງລຸ່ມນີ້ແມ່ນຢູ່ ແລະຢູ່ໃນສະພາບດີ:
- 1 x HoldPeak HP-881D Digital LUX Meter
- 1 x ກະເປົາຖື
- 1 x ຄູ່ມືການສອນ

Figure 2: Digital LUX Meter and accessories
3. ຜະລິດຕະພັນເກີນview
Familiarize yourself with the components and controls of your HP-881D Digital LUX Meter.

Figure 3: Labeled components of the HP-881D
ຄຸນນະສົມບັດທີ່ສໍາຄັນ:
- ການຖືຂໍ້ມູນ: ຢຸດການອ່ານປັດຈຸບັນຢູ່ໃນຈໍສະແດງຜົນ.
- ແສງຫຼັງ: ເຮັດໃຫ້ໜ້າຈໍສະຫວ່າງຂຶ້ນເພື່ອໃຊ້ໃນສະພາບແສງໜ້ອຍ.
- MAX/MIN Hold: Records the maximum and minimum measured values.
- Relative Value: Measures the difference between a reference value and current readings.
- ການເກັບຮັກສາຂໍ້ມູນ: Allows recording of measurement data.
- Environment Temperature Display: ສະແດງອຸນຫະພູມອາກາດລ້ອມຮອບ.
- Lux/FC Selection: ສະຫຼັບລະຫວ່າງຫົວໜ່ວຍ Lux ແລະ Foot-Candle.
- ການສະແດງ Bar Graph: Provides a visual representation of light intensity.
- 270° Rotation Sensor: The sensor head can be rotated for flexible measurement angles.

Figure 4: Functional icons

Figure 5: 270° Rotatable Sensor Head
4. ຕັ້ງຄ່າ
4.1 ການຕິດຕັ້ງຫມໍ້ໄຟ
The HP-881D requires 3 x 1.5V AAA batteries (not included). To install or replace batteries:
- ຊອກຫາຊ່ອງໃສ່ຫມໍ້ໄຟຢູ່ດ້ານຫຼັງຂອງອຸປະກອນ.
- Unscrew the back cover screws using a screwdriver.
- Remove the old batteries (if any) and insert three new 1.5V AAA batteries, observing the correct polarity (+/-).
- ປ່ຽນຝາປິດຊ່ອງໃສ່ໝໍ້ໄຟ ແລະ ຮັດສະກູໃຫ້ແໜ້ນ.
ວິດີໂອທີ 1: ສາທິດຜະລິດຕະພັນລວມທັງການຕິດຕັ້ງແບັດເຕີຣີ.
4.2 Sensor Head Rotation
The sensor head can be rotated up to 270 degrees to allow for flexible measurement from various angles without repositioning the main unit.

Figure 6: Sensor head rotation
5. ຄໍາແນະນໍາການດໍາເນີນງານ
5.1 ເປີດ/ປິດ
ກົດ ປຸ່ມເປີດປິດ (central button with a circle and line) to turn the device on or off.
5.2 ການວັດແທກພື້ນຖານ
Once powered on, the meter will automatically begin measuring illuminance. Ensure the sensor is pointed towards the light source you wish to measure.
5.3 ການທໍາງານຂອງປຸ່ມ

Figure 7: Detailed Button Functions
- ຖືກະແຈ: ກົດເພື່ອຢຸດການອ່ານປັດຈຸບັນຢູ່ເທິງໜ້າຈໍ. ກົດອີກຄັ້ງເພື່ອປ່ອຍ.
- Lux/FC Selection: Use the 'Lux/' and 'Fc/' buttons (up and down arrows) to switch between Lux and Foot-Candle measurement units.
- REL Key: Enters relative measurement mode. This allows you to measure the difference from a set reference point.
- MAX/MIN Selection: Press to cycle through maximum, minimum, and current readings.
- RANGE Select Button: ປັບຂອບເຂດການວັດແທກ.
- ປຸ່ມແສງ: Activates or deactivates the backlight for the LCD display.
- ສະຫຼັບ °C/°F: ສະຫຼັບການສະແດງອຸນຫະພູມລະຫວ່າງເຊວຊີ ແລະຟາເຣນຮາຍ.
- ປຸ່ມ REC: Short press to record data.

Figure 8: Backlight Effect
6. ຄໍາຮ້ອງສະຫມັກ
The HP-881D Digital LUX Meter is suitable for a wide range of applications, including:
- Factories and warehouses
- Schools and offices
- Homes and residential areas
- Street lighting assessment
- Laboratories and research facilities
- Indoor grow light optimization
- Shop window and stage lighting evaluation

Figure 9: Indoor Grow Light Application

Figure 10: Home Lighting Applications

ຮູບທີ 11: ລະດັບຄວາມກ້ວາງຂອງແອັບພລິເຄຊັນ
7. ຂໍ້ມູນຈໍາເພາະ
| ຄຸນສົມບັດ | HP-881D |
|---|---|
| ວັດແທກໄລຍະ | 0.1Lux~400,000Lux; 0.01FC~40,000FC |
| ຄວາມຖືກຕ້ອງ | ≤20,000Lux/2,000FC: ±4%rdg±0.5f.s.; ≥20,000Lux/2,000FC: ±5%rdg±10digits |
| ຄວາມລະອຽດ | 1 Lux |
| ການເຮັດຊ້ຳ | ±2% |
| ຄຸນລັກສະນະຂອງອຸນຫະພູມ | ±0.1%/°C |
| Sampເວລາ ling | 2.0 ຄັ້ງ / ນ |
| ຈໍສະແດງຜົນ | 3999 |
| ການຖືຂໍ້ມູນ | ແມ່ນແລ້ວ |
| Back Light | ແມ່ນແລ້ວ |
| ຖື MAX | ແມ່ນແລ້ວ |
| MIN ຖື | ແມ່ນແລ້ວ |
| ມູນຄ່າທີ່ກ່ຽວຂ້ອງ | ແມ່ນແລ້ວ |
| ການເກັບຮັກສາວັນທີ | ແມ່ນແລ້ວ |
| ການສະແດງອຸນຫະພູມສະພາບແວດລ້ອມ | ແມ່ນແລ້ວ |
| Lux/FC selection | ແມ່ນແລ້ວ |
| ການສະແດງເສັ້ນກຣາຟ | ແມ່ນແລ້ວ |
| ປະເພດຫມໍ້ໄຟ | 9V(6F22)*1 (Note: Product uses 3xAAA, not 1x9V. This is a discrepancy in source data. Follow 3xAAA from product info.) |
| ຂະໜາດ | 173*52*30ມມ |
| ນ້ຳໜັກ | 155g |
Note: The product uses 3xAAA batteries, not 1x9V as listed in some specifications. Please refer to the battery installation section for correct battery type.

ຮູບທີ 12: ລາຍລະອຽດສະເພາະ

ຮູບທີ 13: ຂະໜາດຜະລິດຕະພັນ
8. ບໍາລຸງຮັກສາ
To ensure the longevity and accuracy of your HP-881D Digital LUX Meter:
- ຮັກສາອຸປະກອນໃຫ້ສະອາດ ແລະ ແຫ້ງ. ເຊັດດ້ວຍຜ້າອ່ອນໆ, ເຊັດໃຫ້ແຫ້ງ.amp ຜ້າຖ້າຈໍາເປັນ.
- ຫຼີກລ່ຽງການໃຫ້ອຸປະກອນສຳຜັດກັບອຸນຫະພູມທີ່ສູງເກີນໄປ, ຄວາມຊຸ່ມຊື່ນ ຫຼື ແສງແດດໂດຍກົງເປັນເວລາດົນ.
- When not in use for an extended period, remove the batteries to prevent leakage.
- Store the device in its protective carrying case to prevent damage.
- ຢ່າພະຍາຍາມຖອດປະກອບ ຫຼືດັດແປງອຸປະກອນ, ເພາະວ່າການຮັບປະກັນຈະໝົດໄປ ແລະອາດເຮັດໃຫ້ເກີດຄວາມເສຍຫາຍໄດ້.
9. ການແກ້ໄຂບັນຫາ
ຖ້າທ່ານພົບບັນຫາກັບອຸປະກອນຂອງທ່ານ, ກະລຸນາອ້າງອີງເຖິງວິທີແກ້ໄຂທົ່ວໄປຕໍ່ໄປນີ້:
- ອຸປະກອນບໍ່ເປີດ: ກວດເບິ່ງວ່າແບດເຕີຣີຖືກຕິດຕັ້ງຢ່າງຖືກຕ້ອງແລະມີການສາກໄຟພຽງພໍ. ປ່ຽນແທນພວກມັນຖ້າຈໍາເປັນ.
- Inaccurate or inconsistent readings: Ensure the sensor is clean and unobstructed. Make sure you are measuring in stable lighting conditions and the sensor is positioned correctly relative to the light source. Avoid rapid movements during measurement.
- ຈໍສະແດງຜົນແມ່ນມືດມົວ ຫຼືອ່ານບໍ່ໄດ້: Activate the backlight function. If the issue persists, replace the batteries.
ຖ້າບັນຫາຍັງຄົງຢູ່ຫຼັງຈາກພະຍາຍາມຂັ້ນຕອນເຫຼົ່ານີ້, ກະລຸນາຕິດຕໍ່ຝ່າຍຊ່ວຍເຫຼືອລູກຄ້າ.
10. ຄໍາແນະນໍາຜູ້ໃຊ້
- Consistent Measurements: For the most accurate and repeatable results, ensure the sensor is held at the same distance and angle from the light source for each measurement. Variations in position can significantly affect readings.
- ຄວາມໝັ້ນຄົງດ້ານສິ່ງແວດລ້ອມ: Avoid taking measurements in rapidly changing light conditions or environments with flickering lights, as this can lead to inconsistent data.
- ການປ້ອງກັນເຊັນເຊີ: Always keep the sensor cap on when the device is not in use to protect the sensitive silicon diode from dust and damage.
11. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ
This product comes with a 1-year warranty from the date of purchase. For warranty claims or technical support, please contact the HoldPeak Official Store. Keep your purchase receipt as proof of purchase.





