1. Destpêk
The Lutron YK-37UVSD is a professional-grade light meter designed for accurate measurement of both UVA and UVC light. This device features a microprocessor circuit for high reliability and durability, making it suitable for various applications including monitoring blue light radiation hazards, UV sterilization, graphic arts, photochemical matching, UV EPROM erasure, photoresist exposure, and curing of inks, adhesives, and coatings. It includes an SD card real-time data logger and supports Type K temperature measurements.
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your YK-37UVSD light meter.
2. Agahiyên Ewlekariyê
- Berî xebitandina amûrê, hemî rêwerzan bi baldarî bixwînin.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight for prolonged periods.
- Dûr nekevin amûrê an nekeve bin bandorên xurt.
- Do not attempt to open or modify the device; this will void the warranty.
- Piştrast bike ku pîl bi polarîteya rast hatine danîn. Ger cîhaz ji bo demek dirêj neyê bikar anîn, pîlan derxînin.
- Keep the probes clean and free from dust or debris to ensure accurate readings.
3. Hilbera Serîview
3.1 Yekîneya Sereke
The main unit features an LCD display, control buttons for power, function, data hold, recording, zero adjustment, and data logging. It also includes slots for the SD card and probe connections.

jimar 1: Pêşde view of the Lutron YK-37UVSD main unit, showing the LCD display and control buttons.
3.2 UVA and UVC Probes
The meter comes with two specialized probes: one for UVA measurement and another for UVC measurement. Both probes feature a cosine correction filter for accurate light detection.

jimar 2: Separate UVA and UVC probes. The UVA probe has a cylindrical body, while the UVC probe has a flat, circular sensor head.
4. Sazkirin
4.1 Sazkirina Pîl
- Locate the battery compartment cover on the back of the main unit.
- Serpêlê vekin.
- Insert six (6) 1.5V AA (UM-3) batteries, ensuring correct polarity as indicated inside the compartment.
- Berga beşa pîlê biguherînin.
4.2 Têkiliya Probe
- Identify the desired probe (UVA or UVC) for your measurement.
- Connect the probe's cable connector to the corresponding input jack on the top or side of the main unit. Ensure a secure connection.
4.3 Têxistina Karta SD
- Locate the SD card slot on the side of the main unit.
- Insert a formatted SD card (up to 16 GB) into the slot until it clicks into place.
- To remove, gently push the card inward until it springs out.
5. Telîmatên Operating
5.1 Hêzdarkirin/Off
Bitikîne POWER/ESC button to turn the meter on. Press and hold the POWER/ESC bişkojkê çend saniyeyan bikirtînin da ku wê vemirînin.
5.2 Measurement Mode Selection
After powering on, the meter will display the current measurement mode. To switch between UVA and UVC modes, press the dedicated UVA/UVC button (if available) or cycle through modes using the FUNC/HOLD/NEXT button as per the on-screen prompts.
5.3 Hilbijartina Rêzeyê
The YK-37UVSD offers two measurement ranges: 2 mW/cm² and 20 mW/cm². The meter typically auto-ranges, but you may be able to manually select a range using the DANÎN button or a combination of buttons as described in the on-screen menu.
5.4 Fonksiyona Hilgirtina Daneyê
Bitikîne RAWESTAN bişkok (bi gelemperî bi hev re tê hev kirin) FUNC/NEXT) to freeze the current reading on the display. Press it again to release the hold function.
5.5 Serastkirina Zero
For accurate measurements, especially in low light conditions, a zero adjustment may be necessary. With the probe covered or in a dark environment, press the SIFIR button to calibrate the meter to zero.
5.6 Data Logging (SD Card)
To initiate real-time data logging to the SD card:
- Ensure an SD card is inserted.
- Bitikîne LOGGER button. The display will indicate that logging has started.
- To stop logging, press the LOGGER dîsa bişkojka.
- Data is saved in a format compatible with spreadsheet software for easy analysis.
5.7 Type K Temperature Measurement
The YK-37UVSD also supports Type K thermocouple temperature measurements. Connect a Type K thermocouple probe (sold separately) to the designated input. Use the FUNC/NEXT button to switch to temperature measurement mode.
6. Maintenance
6.1 Paqijkirin
Wipe the device and probes with a soft, dry cloth. For stubborn dirt, a slightly damp Dikare qumaşê bi deterjanek nerm were bikar anîn, da ku piştrast be ku şilek nakeve nav cîhazê. Paqijker an çareserkerên aşınker bikar neynin.
6.2 Guhertina Pîl
When the low battery indicator appears on the display, replace all six AA batteries promptly to ensure continued accurate operation. Refer to section 4.1 for battery installation instructions.
6.3 Storage
Store the meter and probes in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for an extended period, remove the batteries to prevent leakage.
7. Destpêkirin
- No Display / Device Not Turning On: Check battery installation and ensure batteries are fresh. If using an AC adapter, verify the connection and power source.
- Xwendinên nerast: Ensure probes are clean and properly connected. Perform a zero adjustment. Verify that the correct measurement mode (UVA/UVC) is selected.
- Çewtiya Karta SD: Ensure the SD card is properly inserted and formatted. Try a different SD card if the issue persists.
- Data Logging Not Working: Check if the SD card has sufficient free space. Ensure the logging function is activated correctly.
Eger piştî van çareseriyan pirsgirêk berdewam bikin, ji kerema xwe bi piştgiriya xerîdar re têkilî daynin.
8. Specifications
The following table outlines the key specifications of the Lutron YK-37UVSD UVA and UVC Light Meter:

jimar 3: Detailed specification sheet for the Lutron YK-37UVSD, providing comprehensive technical data.
| Taybetî | Specification |
|---|---|
| Cins | YK-37UVSD |
| Rêjeyên Pîvandinê | UVA: 2 mW/cm², 20 mW/cm² UVC: 2 mW/cm², 20 mW/cm² |
| Type Sensor | UVA probe, UVC probe with cosine correction filter |
| Pêşkêşî | LCD |
| Data Logger | SD Card (1 GB to 16 GB), Real-time data logging |
| Pîvana Germahiya | Type K Thermocouple (optional probe) |
| Navê min | 6 x 1.5V AA (UM-3) batteries or DC 9V adapter |
| Humidity Operating | Kêmtir ji 85% RH |
| Pîvan (Yekîneya Sereke) | Nêzîkî 203 x 76 x 38 mm (8 x 3 x 1.5 înç) |
| Giranî (Yekîneya Sereke) | Approx. 300 g (0.66 lbs) |
| Welatê Origin | Taiwan |
| Babetê Weight | 426 g |
| Mezinahiya Hilberê | 30.48 x 15.24 x 10.16 cm |
9. Garantî û Piştgirî
9.1 Agahî Garantî
This product is manufactured by Lutron. For specific warranty terms and conditions, please refer to the warranty card included with your product or contact the manufacturer directly. Warranty coverage typically includes defects in materials and workmanship under normal use.
9.2 Piştgiriya Mişterî
For technical assistance, troubleshooting not covered in this manual, or service inquiries, please contact the seller or the authorized Lutron service center in your region. Please have your model number (YK-37UVSD) and purchase information ready when contacting support.