DL-500 Series Specifications

Telescope

DL-502

DL-503

Magnification

32X

28X

Objective aperture

45mm (1.78in.)

36mm (1.42in.)

Resolving power

3”

3.5”

Field of view

1°20”

1°20”

Minimum focus

5.0ft. (1.5m)

5.0ft. (1.5m)

Image

Erect

Erect

Stadia ratio

100

100

Compensator

DL-502

DL-503

Type

Pendulum compensator with magnetic damping system

Working range

±15’

±15’

Height Measurement

DL-502

DL-503

Accuracy

(standard deviation for 1km double run leveling)

Electronic reading

Invar staff

0.6mm

0.8mm

Fiberglass staff

1.0mm

1.5mm

Optional reading

1.0mm

2.0mm

Measuring range

5.3 to 328ft. (1.6 to 100m)

Measuring time

Fine

3 sec. (single/continuous/average)

Tracking

1 sec.

1 sec.

Least count

0.0001/0.001m, 0.001/0.01ft., 1/8in.

Minimum brightness condition

20lx. at the staff surface

Distance Measurement (D=measuring distance)

DL-502

DL-503

Accuracy

D 10m

±0.4in. (±10mm)

±0.4in. (±10mm)

10m<D 50m

±0.1%×D

±0.1%×D

50m<D

±0.2%×D

±0.2%×D

Least count

0.01/0.1m, 0.1/1ft., 1in.

0.01/0.1m, 0.1/1ft., 1in.

User Interface

DL-502

DL-503

Display

128×32 dot matrix LCD with backlight

Keyboard

8 keys (7 on front panel, 1 on side panel)

Circular level sensitivity

10’/2mm

10’/2mm

Measurement Program

DL-502

DL-503

Single / Continuous / Average / Elevation / Height difference / Cut & Fill / Stakeout distance

Data Storage

DL-502

DL-503

Internal memory

2,000 points

2,000 points

Job

Max. 20 jobs

Max. 20 jobs

Data output format

CSV

CSV

Interface

RS-232C

RS-232C

Environmental

DL-502

DL-503

Water resistance

IPX4 (IEC 60529:2001)

Operating temperature

-4°F to 122°F (-20°C to 50°C)

Storage temperature

-40°F to 158°F (-40°C to 70°C)

Others

DL-502

DL-503

Power supply

BDC46B (Li-ion battery, 7.2V)

Operating time

Approx. 16 hours

Approx. 16 hours

Weight (including battery)

5.3lb. (2.4kg)

Size (D x W x H)

10.1×6.2×7.2in. (257×158×182mm)