Johnson 40-6932 Operating and maintenance instructions

Thank you for purchasing this Johnson theodolite - the easiest way
to tackle large jobsite layout. This theodolite is engineered to give
you years of trouble-free performance and reliability!
Johnson theodolites feature:
• 2 arcsec (40-6932) or 5 arcsec (40-6935/40-6936) accuracy
• Optical plummet (40-6932/40-6935)
• Laser plummet & sighting laser (40-6936)
• Dual LCD displays
• Large 30mm objective
• Simple dual 6-button keypads
• Focusable crosshairs
• Rain cover for use on wet jobsites
• Compatible with 90° pivoting rear optic
(sold separately)
KEYPAD OVERVIEW
LCD OVERVIEW
KEY COMPONENTS
INSTALLING BATTERIES
BATTERY DOOR
CENTER MARK
HORIZONTAL
FINE MOTION
KEYPAD
OBJECTIVE LENS
LEVELING VIAL
LCD DISPLAY (2)
CIRCULAR VIAL
TRIPOD MOUNT
LEVELING LEGS (3)
VERTICAL FINE
MOTION
TARGETING SIGHT
BATTERY LIFE
REPEAT TOTAL
REPEAT MODE
VERTICAL
INDICATOR
# REPEATS
HORIZONTAL
INDICATOR
LEFT/RIGHT
INDICATOR
VERTICAL ANGLE
FUNCTION MODE
GON ANGLE MODE
% VERTICAL SLOPE
TILT SENSOR
AVERAGE VALUE
HORIZONTAL
ANGLE
HANDLE
POWER - Press to toggle power on/o.
FUNCTION - Tap to enter function mode (see manual for
details). Double tap to enable the backlight.
VERTICAL UNIT CONTROL - Press to toggle vertical units
between the default degrees and percent of slope.
HOLD - Press to freeze the horizontal angle. Press again to
release. Hold does not aect the vertical angle.
ZERO SET - Sets current horizontal position to 0°0’0”.
RIGHT/LEFT - Sets the horizontal angle direction.
To install AA’s: 1: Remove battery
holder. 2: Open holder to access AA’s.
We want to get you up and running as quickly as possible - but this quick start guide is not a replacement for reading and understanding your
operator’s manual! For complete safety & operating instructions, refer to the operator’s manual included with your tool, or scan the QR code.
1 2
The theodolite comes with an option to use the rechargeable battery
pack or standard AA cell batteries. To remove, press the retaining tab
and pull the battery away from the theodolite. To reinstall, align the
bottom edge and then
press the battery into
place. Charge the NiMH
pack by plugging the
included adapter directly
into the battery. The
adapter’s light will turn
green when fully charged.
40-6932, 40-6935 & 40-6936 Theodolite Quick Start Guide
40-6932, 40-6935, 40-6936 QSG
www.johnsonlevel.com/manuals

OPERATING THE THEODOLITE DISTANCE ESTIMATION
USING THE 90° OFFSET LENS
We want to get you up and running as quickly as possible - but this quick start guide is not a replacement for reading and understanding your
operator’s manual! For complete safety & operating instructions, refer to the operator’s manual included with your tool, or scan the QR code.
• Level the theodolite and aim the
objective at a grade rod.
• Read the grade rod to obtain the
dierence in height between the top
and bottom stadia hairs. Multiply this
dierence by 100 to get horizontal
distance.
• For example, as shown to the right,
the distance between stadia hairs is
1.4” inches. Therefore the distance
from theodolite to grade rod is 140”,
or 11’8”.
This theodolite can operate using an
oset lens, sold separately, which is
ideal for when the theodolite is used on
ground level or any time your eye does
not align well to the objective.
Install the oset lens according to the
directions included with the oset lens. It
can be stored in your theodolite carrying
case when not in use.
JOHNSON THEODOLITES
40-6932, 40-6935, 40-6936 QSG
www.johnsonlevel.com/manuals
• Align the theodolite over your reference point and use the circular
vial to coarse level the theodolite. Validate your position over the
reference point using the optical or laser plummet. Readjust the
position as needed.
• Complete the fine leveling of the theodolite using the three
leveling legs until the leveling vial bubble is centered in both axes.
• Note, detailed leveling instructions can be found in the manual.
• Power on the theodolite by pressing .
• Rotate the theodolite to your desired zero point and press
to zero the measurement. The vertical angle display is an absolute
measurement with respect to true level and cannot be zeroed. If
the vertical angle on the LCD shows “b“, the theodolite is not level.
• Note, when sighting targets, the 30x zoom of the main objective
can make it dicult to locate a small target. Use the targeting
sight to “rough-site” your target, then switch to the objective lens.
• When you are centered on your target, lock the horizontal and
vertical fine motion controls to prevent the theodolite from
moving. Read the angle from the LCD display.
• To hold the horizontal reading on the LCD display even if the
theodolite moves, press . Note, the vertical angle cannot be
held.
• To convert the vertical reading from degrees to percent grade,
press . Press again to toggle back.
To perform repeat measurements:
• Press , then [REP]. Aim at target A and press to
zero the theodolite.
• Aim at target B and press .
• Aim back at target A and press to release the angle hold.
• Rotate back to target B and press . Double and average angle
value will be displayed on the LCD display.
• Repeat the last two steps as required. A maximum of 15 repeat
measurements can be taken. Note: The repeat mode will not work if
the angle between targets A and B is <30 arcseconds.
• Press then to exit repeat measurement mode.