Topcon DL-501 Instruction Manual page 127

Minimum display:
Height
Distance
*1
Accuracy : (ISO17123-2 compatible)
Height (Standard deviation for 1 km of double-run leveling)
Electronic measurement
Visual measurement
Distance (Electronic measurement)
Measuring modes:
*3
Measuring time :
Single/Repeat
Average
Rapid repeat
Earth curvature and refraction correction:
*1 When measuring outdoors with minimal atmospheric motion, the staff set up in natural
sunlight and luminosity at the surface of the staff equal to 20lx.
*2 When measuring with no atmospheric motion or scintillation, ambient temperature is stable
and the instrument and staff are set up out of direct sunlight. Accuracy may be affected by
wind conditions and the set up of the instrument and staff.
*3 When measuring to a staff set up outdoors in fine to cloudy conditions.
*1, 3 These specifications may change depending on the weather conditions and measurement
conditions.
Internal memory
Capacity:
External memory
SD card (up to 4GB, SDHC supported)
USB flash memory (up to 4 GB)
Data transfer
Data input/output
USB
Card slot
Bluetooth wireless communication
Transmission method:
Modulation:
Frequency band:
Bluetooth profile:
Power class:
Usable range:
0.00001/0.0001/0.001m (0.0001/0.001/0.01ft) (selectable)
0.001/0.01/0.1m (0.01/0.1/1ft) (selectable)
0.2mm (with BIS30A, DL-501 Advanced only)
0.3mm (with BIS20/30)
1.0mm (with BGS40/50)
1.0mm (with BGS40/50)
±10mm or less (10m or less)
±(0.1% x D) or less (over 10 to less than 50m)
±(0.2% x D) or less (50 to 100m)
(D: measured distance, unit: m)
Single/Repeat/Average/Rapid (selectable)
less than 2.5 sec.
No. of measurements set × less than 2.5 sec.
less than 1 sec.
No/Yes K=0.142/Yes K=0.20 (selectable)
10,000 measurement points
Asynchoronous serial, RS232C compatible
USB Ver. 1.1, Host (Type A)
SD card
FHSS
GFSK, π/4DQPSK, 8DPSK
2.402 to 2.48GHz
SPP
Class 1
to 100m (usable range may vary with different paired devices)
25. SPECIFICATIONS
*2
119