Specifications Overview:
The R-400V Series offers a reflectorless EDM range of 400m and easy data transfer to a PC via USB and SD connections. It includes dual-axis compensators for 3” and 5” models and a triple-axis compensator for the 2” model. The series features an adjustable laser plummet and efficient accuracy.

Models and Optical Features:
Models include R-422Vn, R-423Vn, R-425Vn, and R-435Vn, all with a telescope magnification of 30x and an effective aperture of 45mm. The resolving power is 3.0” with a field of view of 2.6% (1° 30’).

Distance Measurement:
The laser class is IIIa (3R) for reflectorless and II (2) for prism/sheet. Reflectorless measurement ranges from 1.5 to 400m, while reflector sheet ranges from 1.5 to 600m (800m under good conditions). Mini Prism and 1P/3P ranges extend up to 7,000m (9,000m under good conditions).

Accuracy and Measurement Time:
Accuracy for prism/reflector sheet is ±(3 + 2 ppm x D) mm for 1.5 ~ 10m and ±(2 + 2 ppm x D) mm for distances over 10m. Reflectorless accuracy is ±(5 + 2 ppm x D) mm for 1.5 ~ 300m. Measurement times vary by mode, with normal mode taking 2.0 seconds for prism/reflector sheet and 2.4 seconds for reflectorless.

Angle Measurement:
Utilizes an absolute rotary encoder with a minimum count of 1”/5” selectable. Accuracy is 2”, 3”, and 5” depending on the model.

Compensator and Sensitivity:
Features a 3-axis compensator for 2” models and a 2-axis for others. Sensitivity of vials includes a plate level of 30”/1mm and a circular level of 8’/2mm.

Environmental and Physical Specifications:
Dust and water resistance is rated at IP56. The operating temperature range is -20°C to +50°C. Dimensions are 180 (W) x 342 (H) x 177 (L) mm with a weight of 5.7 kg including the battery.

Power and Data Processing:
The battery pack is a Ni-MH 4300 mAh rechargeable with an operation time of approximately 7.0 hours. Data recording is via internal memory with a capacity for 45,000 coordinate data points. Interfaces include RS-232C, SD CARD, and USB.

Additional Features:
The display is a graphic LCD with 20 characters x 8 lines. The device includes a laser pointer and date clock. Compatibility with SD cards from Panasonic, SanDisk, and Toshiba is noted.

Safety and Compliance:
Laser safety classes are II and IIIa, conforming to FDA 21 CFR Ch. 1 § 1040. Caution is advised against staring into the laser beam.