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R/L
Horizontal angle reading direction display
switch-over key
Switches the reading direction of horizontal angle.
Clockwise reading “HA:” and counterclockwise reading
“HL ”. (See p.32.)
HOLD
Horizontal scale hold and
Horizontal angle summing key
Holds current horizontal angle reading, even when sighting
direction is changed. (See p.33.)
Enables summing of repeated horizontal angle
measurements. (See p.34.)
RESET
Horizontal angle reset key
Resets horizontal angle to zero. (See p.32.)
R/L
R/L
VA: 86°35´40"
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HA: 157°07´20"
VA: 86°35´40"
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HA 102°52´10"
VA: 95°18´30"
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HA: 254°26´40" HOLD
VA: 136°47´50"
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HA: 0°00´00"
VA: 114°27´40"
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HA: 45°00´00" STOP
VA: 114°27´40"
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HA: 0°00´00" RUN