LED Flood Curing Commissioning — Verifying Dose Before a UV LED Flood Lamp Goes Into Production

A new LED flood curing station is only as trustworthy as the measurements taken on the day it is installed. Commissioning turns a catalog intensity into a documented dose at your part, so later drift has a baseline to be measured against.

Q: How do you commission an LED flood curing lamp?

A: Confirm the delivered unit matches the order, mount it at a fixed working distance, measure irradiance across the full curing field with a radiometer suited to the lamp’s wavelength, calculate exposure time from the material’s required dose, cure and test sample parts, and record every value as the station’s baseline. Repeat the measurement whenever the setup changes.

Step 1: Receiving Checks

Before mounting anything, confirm three details against the purchase order:

Model and curing field — for example, an Incure L1212 should cover a 12″×12″ field.
Wavelength — every L-Series™ unit is factory-configured to 365, 385, 395, or 405 nm and cannot be changed later, so a mismatch has to be caught now.
Control inputs — confirm which signal the station will use: foot switch, PLC, or RS232.

Step 2: Fix the Working Distance

Incure quotes L-Series™ intensity at a 2-inch working distance, which makes 2 inches the natural reference for the first measurement. If production will run at a different distance, measure there too, because the published figure only applies at the stated distance. Use a jig, shelf, or fixture so the distance cannot drift between parts. Inside a C-Series™ chamber, the adjustable shelf on the C141C and C191C sets this distance; the C131C and C131D have fixed geometries.

Step 3: Map the Field, Not Just the Center

A single center reading says nothing about the edges, which is where flood cures usually fall short. Lay out a measurement grid covering the whole curing field, including points near the corners, and record irradiance at each one at the production distance. Use a radiometer whose sensor response covers the lamp’s wavelength; a meter calibrated for a different band can misread a narrow-band LED. Keep the grid layout documented so the exact points can be re-measured later, and record the meter’s serial number so the same instrument, or one cross-checked against it, is used for every future comparison.

Email Us with your model, wavelength, and production distance, and Incure’s engineers can help define a measurement plan for the station.

Step 4: Calculate Exposure From the Weakest Point

Dose equals irradiance multiplied by time. Base the exposure on the lowest reading in the map, not the average, so every point on the part receives at least the required dose. As a hypothetical example: if a material needs 2,400 mJ/cm² and the lowest mapped reading is 1,500 mW/cm², the exposure is 2,400 ÷ 1,500 = 1.6 seconds. Both figures are illustrative; use your material’s data sheet value and your own measured minimum.

Set the lamp to timer mode at that exposure so every cycle delivers the same dose regardless of operator.

Step 5: Cure and Test Samples

Measurements confirm the lamp; samples confirm the process. Cure parts placed at the center and at the weakest mapped positions, then test them with the method your quality plan already uses, such as a surface-tack check, hardness reading, or bond-strength test. If the edge samples fall short while the center passes, revisit the distance or the curing field before lengthening exposure for every part.

Step 6: Record the Baseline

Create a commissioning record that includes:

Model, serial number, and wavelength
Working distance and fixture or shelf position
Radiometer model and calibration date
The full irradiance map, with point locations
Material, required dose, and set exposure time
Sample test results and sign-off

This record is what makes future checks meaningful. A later reading only signals a problem when it can be compared with a known starting value.

Step 7: Prove the Controls and Interlocks

Before handover, trigger several cycles from the actual production signal, whether a foot switch, PLC output, or RS232 command, and confirm the lamp runs the programmed timer exposure each time. If the lamp sits inside a C-Series™ chamber, open the drawer mid-cycle and confirm the drawer-activated shut-off cuts lamp power. Record both checks alongside the irradiance data.

When to Re-Commission

Repeat the mapping whenever the station changes in a way that could move the dose:

The lamp is relocated or remounted
The working distance or shelf position changes
The lamp moves into or out of a chamber
A new material with a different dose or wavelength is introduced
Cure quality shifts without an obvious cause