4-2
4 DISTANCE MEASUREMENT
4.1 Setting of the Atmospheric Correction
When setting the atmospheric correction, obtain the correction value by measuring the temperature
and pressure.
Refer to Section 12.2 “Setting of Atmospheric Correction Value”.
4.2 Setting of the Correction for Prism Constant
Topcon’s prism constant value is 0. Set correction for prism at 0. If the prism is of another manufacture,
the appropriate constant shall be set beforehand.
Refer to Chapter 11 “SETTING THE PRISM
CONSTANT VALUE”. The setting value is kept in the memory even after power is off.
•
Prism constant correction value should be set for each measuring mode.
Confirm that Non-prism
correction value is set at zero before measurement target such as a wall in Non-prism mode or
Sheet mode.
4.3 Distance Measurement (Continuous Measurement)
Make sure the mode displays angle measurement.
Operating procedure
Operation
Display
1
Collimate the center of prism.
Collimate P
2
Press the
{
}
key.
Distance measurement starts. *1),2)
{
}
The measured distances are shown. *3)~*5)
Pressing the
{
}
key again, the display
changes to horizontal (HR) and vertical (V)angle
and slope distance(SD). *6)
{
}
*1) When EDM is working, the "
*
" mark appears in the display.
*2)
To change mode from Fine to Coarse or Tracking, refer to section 4.5 “Fine Mode/Tracking Mode/
To set the distance measurement on when the instrument is powered on, refer to Chapter 17
*3) The distance unit indicator "m" (for meter), "f" (for feet or feet inch) appears and disappears alternatively
with buzzer sounds at every renewal of distance data.
*4) Measurement may repeat automatically in the instrument if the result is affected by shimmer etc.
*5) To return to the normal measuring angle mode from a distance measuring mode, press the
{ANG}
key.
*6) It is possible to choose the display order (HR, HD, VD) or (V, HR, SD) for initial distance measuring
mode.
Refer to Chapter 17 “SELECTING MODE”.
V : 90°10'20"
HR: 120°30'40"
0SET HOLD HSET P1
↓
HR: 120°30'40"
HD*[r] << m
VD: m
MEAS MODE NP/P P1
↓
HR: 120°30'40"
HD* 123.456 m
VD: 5.678 m
MEAS MODE NP/P P1
↓
V : 90°10'20"
HR: 120°30'40"
SD* 131.678 m
MEAS MODE NP/P P1
↓
