Changing The Ppm Value - Pentax R-2501NS Instruction Manual

• Once set, the pressure is displayed at the centre of the top of the measurement screen.
• The factory initial of pressure is "1013hPa".
• Once set, the pressure remains in memory even after the power is turned off.
• Pressure correction is based on 1013 hectopascals (hPa).
• If this instrument is used without correcting the pressure, a distance error per 100m is about
-0.3mm per -10hPa as a pressure difference from 1013hPa.
(For more accurate values, see "12.4 Error when no atmospheric correction is made".)

7.4 Changing the ppm value

The ppm value can be changed only when "ATM CORR" has been set to "ppm INPUT" in
"initial setting 1". "TEMP" and "PRESS" are not displayed.
Example: Setting the ppm value to 31 ppm.
Press [F4][CORR] in MODE B.
] to move the cursor to "3. ppm" and
Press [F4][
press the [F5][SELECT] to enable the temperature to
be changed.
Clear the exiting values by pressing [F5][CLEAR].
Input 31 by pressing the numeric keys.
Press the [ENT] key to accept the
PPM to 31ppm.
Pressing the [ENT] key returns
the instrument to MODE A.
• The valid range of ppm values is from -199 to +199.
• Once set, the ppm value is displayed at the centre of the top of the measurement screen.
• The factory initial of ppm value is "1. AUTO".
• Once set, the ppm value remains in memory even after the power is turned off.
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