Nikon DTM-502 Series Instruction Manual page 171

EDM
Distance range with Nikon prisms
Under normal atmospheric conditions (ordinary haze with visibility about
20km/12.5miles)
With single prism:
With triple prism:
With nine prisms:
Under good atmospheric conditions (no haze with visibility over 40km/25miles)
With single prism:
With triple prism:
With nine prisms:
Precision
MSR mode:
TRK mode:
Measurement intervals
MSR mode:
TRK mode:
Least count:
Temperature compensation range:
Barometric pressure compensation range:
Prism offset correction:
5
Lumi-guide
Light source:
Operational distance:
Positioning accuracy:
Beam spread:
Clamps/tangent screws:
Range:
5-2
2,400m/7,900ft.
3,100m/10,200ft.
3,700m/12,100ft.
2,700m/8,900ft.
3,600m/11,800ft.
4,400m/14,400ft.
± (2 + 2ppm x D) mm
± (4 + 2ppm x D) mm
(within 500m/1600ft.)
1sec. (initial; 1sec.)
0.5sec. (initial; 1sec.)
MSR mode 0.1mm/0.0005ft.
(switchable to 1mm/0.002ft.)
TRK mode 1mm/0.002ft.
(switchable to 10mm/0.02ft.)
-40°C ~ +55°C/-40°F ~ +131°F
(hPa) 533 ~ 1,332hPa (1hPa step)
(mmHg) 400 ~ 999mmHg (1mmHg step)
(in.Hg) 15.8in Hg ~ 39.3in Hg
(0.1in Hg step)
-999 ~ +999mm (1mm step)
High luminescence LED
At least 100m/330ft. from the instrument
Approx. 6cm/2.4in. at 100m/330ft.
About 1.5°
(2.6m/8.5ft. at 100m/330ft. point)
2 speed, Coaxial tangent/Clamp knobs
± 4°