The PM400 manual explains setup, operation, measurement screens, computer interface and maintenance for Thorlabs' handheld optical power and energy meter.
The Thorlabs PM400 is a handheld optical power and energy meter designed for laser and other monochromatic light sources, as well as pulsed light. It supports a range of Thorlabs C‑Series photodiode, thermal and pyroelectric sensors and provides a capacitive touchscreen with multiple measurement displays.
The manual covers general information, unpacking, parts list, detailed operating instructions, measurement configuration, spectral correction, data handling, computer interface with the Optical Power Monitor software, and maintenance procedures. Safety, technical data, warranty and contact information are provided in the appendix.
| Display Type | 4.3" TFT, WQVGA, 400 x 272 Pixels, 16‑bit Color |
|---|---|
| Measurement Ranges | 6 Decades; 50 nA – 5 mA |
| Accuracy | ±0.2% f.s. (5 µA – 5 mA) |
| Bandwidth | DC – 100 kHz (sensor dependent) |
| AD Converter | 16‑bit |
| Current Input Connector | DE‑9 |
Charge the battery for 4 hours before first use.
The PM400 works with Thorlabs C‑Series photodiode, thermal power, thermal position, and pyroelectric sensors, as well as custom detectors.
Thorlabs provides a 24‑month warranty from the date of shipment.
The Optical Power Monitor (OPM) software, including drivers and LabVIEW/C examples, can be used for remote operation.