Atmospheric Correction - Pentax Visio R-400VDN Series Quick Reference Manual

Error Message
ERROR!! EDM ERROR
04 -05, 34-39, 50-53
ERROR!!
ETH ERROR 70-76
ERROR!!
MEMORY ERROR 19
ERROR PS DATA of EDM
ERROR P DATA of EDM
ERROR ETH DATA

3.4 Atmospheric Correction

The speed at which light travels through the air varies depending
on the temperature and atmospheric pressure. The R-400VDN
series is designed to measure distances at the speed of light. In
order to measure accurately, atmospheric correction needs to be
used. The instrument is designed to correct for weather conditions
automatically if the temperature and pressure are input.
Correction is then carried out based on the following formula.
Calculation formula:
K= (276.26713 - 78.565271 • P ) x10
K: Atmospheric Correction Constant
P: Atmospheric pressure (hPa)
t: Temperature(°C)
Distance after Atmospheric Correction D = Ds (1+K)
Ds: Measured distance when no Atmospheric Correction is used.
Meaning
Distance measurement system problem
Angle measurement system problem
Memory problem
Problem of the internal EDM parameters
Problem of the internal ETH parameters
273.14941 + t
-6
12
What to do
Turn the power
off, and then turn on
again. Repair is
needed when the
message appears
consistently.