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39.SPECIFICATIONS
Except where stated, the following specifications apply to all models of iM Series.
Telescope
Length
171 mm
Aperture
45 mm (EDM:48 mm)
Magnification
30X
Image
Erect
Resolving power
2.5"
Field of view
1°30'
Minimum focus
1.3 m
Reticle illumination
5 brightness levels
Angle measurement
Horizontal and Vertical circles type
Rotary absolute encoder
Detecting
iM-52:
2 sides
iM-55:
1 side
IACS (Independent Angle Calibration System)
Yes
Angle units
Degree/Gon/Mil (selectable)
Minimum display
1" (0.0002 gon/0.005 mil)/5" (0.0010 gon/0.02 mil) (selectable)
Accuracy
iM-52:
2" (0.0006 gon/0.010 mil)
iM-55:
5" (0.0015 gon/0.025 mil)
(ISO 17123-3 : 2001)
Measuring time
0.5 sec or less
Collimation compensation
On/Off (selectable)
Measuring mode
Horizontal angle:
Right/Left (selectable)
Vertical angle:
Zenith/Horizontal/Horizontal ±90° /% (selectable)
Tilt angle compensation
Type
Liquid 2-axis tilt sensor
Minimum display
1"
Range of compensation
±6' (±0.1111 gon)
Automatic compensator
ON (V & H/V)/OFF (selectable)
Compensation constant
Can be changed
Distance Measurement
Measuring method
Coaxial phase shift measuring system
Signal source
Red laser diode (690 nm) Class 3R
(IEC60825-1 Ed.3.0: 2014/ FDA CDRH 21CFR Part 1040.10 and
1040.11 (Complies with FDA performance standards for laser products
except for deviations pursuant to Laser Notice No.50, dated June 24,
2007.))
(When the prism or reflective sheet is selected in Config mode as target,
the output is equivalent to Class 1).
Measuring range
(Using the following reflective prism/reflective sheet target during
normal atmospheric conditions
*1
/
*2
is good atmospheric conditions.)
Mini pole prism OR1PA
*3
:
1.3 to 500 m (1,640 ft)
Compact prism CP01
*3
:
1.3 to 2,500 m (8,200 ft)