Johnson 40-6932 User manual

©2011 Johnson Level & Tool 1
Electronic Digital Theodolite
Model No. 40-6932 and 40-6935
Instruction Manual
Congratulations on your choice of this Electronic Digital Theodolite.
We suggest you read this instruction manual thoroughly before using
the instrument. Save this instruction manual for future use.
!WARNING:
4430H-English_Manuals 2/22/11 11:08 AM Page 1

2©2011 Johnson Level & Tool
Table of Contents
1. Kit Contents
2. Features and Functions
3. Location of Parts/Components
4. Operating nstructions
5. Using the Product
6. Self-Check & Fine Calibration
7. Technical Specifications
8. Care and Handling
9. Product Warranty
10. Warranty Registration
11. Accessories
1. Kit Contents
Description for Model 40-6932 & 40-6935 Qty.
Electronic Digital Theodolite 1
Alkaline Battery Pack (batteries not included) 1
NiMH Rechargeable Battery Pack 1
NiMH Battery Charger 1
Rain Hood 1
Adjustment Tools 1
nstruction Manual with Warranty Card 1
Hard-Shell Carrying Case 1
4430H-English_Manuals 2/22/11 11:08 AM Page 2

©2011 Johnson Level & Tool 3
2. Features and Functions
• 2” or 5” angular accuracy - accurate enough for any construction job
• Vertical axis compensation - tilt sensor provides the highest level
of accuracy and can be turned on or off depending on job
requirements
• Dual LCD with large characters - easy to see angle readings
eliminate errors and reduces eye fatigue
• Backlit LCD screen and telescope reticle - allows work in low light
conditions including indoors and extended hours near dawn
and dusk
• Simple six button keypad - quick setups and simple operation with
low operator learning curve
• Large suite of programmable settings - provide multiple options for
various users and job requirements including zero position of
vertical angle
• Measurement units in degrees, gon, or mils
• 90 degree angle audible notification - for quick turning and set out
of right angles
• nstant conversion of vertical angles to percent of grade -
convenient for slope work
• Ni-MH rechargeable battery pack and charger - lower operating cost
with reusable batteries
• Alkaline battery pack standard - provides backup and eliminates
downtime if the charge is lost in the middle of a job
• Battery status indicator - no power surprises and allows for better
planning
• Automatic shutoff - conserves battery life when not in use - can be
disabled if desired
4430H-English_Manuals 2/22/11 11:08 AM Page 3

4©2011 Johnson Level & Tool
3. Location of Part/Components
Handle
Targeting Sight
Objective Lens
Horizontal Fine
Motion
Horizontal Clamp
LCD Display
Operating Keys
Tripod
Base Plate
Handle Screw
Center Mark &
Vertical Plate
Tubular Vial
Circular Vial
Battery Case
Eyepiece
Telescope Fine
Motion
Telescope Clamp
Tribrach
Locking Lever
Focusing Ring
Optical Plummet
Communication Port
Leveling Screw
4430H-English_Manuals 2/22/11 11:08 AM Page 4

©2011 Johnson Level & Tool 5
4. Operating Instructions
Display and Display Explanation
1. Ht - Total value of repeated angles measured
2. V - Vertical angle
3. Number of repeated measurements
4. AVG - Value of repeated angle measurements
5. HR - Angle increases with clockwise turning
6. HL - Angle increases with counterclockwise turning
7. T LT - Tilt sensor
8. F - Function mode
9. G - Angle unit GON
10. % - Vertical slope in percent
11. REP - Repeated angle measurement mode
12. Battery power indication
ote: f the display shows “b” after activating the tilt sensor, the
instrument exceeds its compensation range and the instrument
should be leveled.
1
2
3
4
5 6
7
89
101112
4430H-English_Manuals 2/22/11 11:08 AM Page 5

6©2011 Johnson Level & Tool
Change the number indicated by the cursor
Power key
ero the horizontal angle reading
Change vertical angle to percent of grade
Repeated angle measurement
Function key selection
Hold horizontal angle reading
Set horizontal-angle rotation direction
lluminating the display
Moving the cursor to the left
Moving the cursor to the right
Operating Panel and Operating Keys
4430H-English_Manuals 2/22/11 11:08 AM Page 6

©2011 Johnson Level & Tool 7
Preparation Before Measurement
Centering and Leveling with Optical Plummet
• Level and center the instrument precisely to ensure its best
performance.
• Extend the tripod legs to a suitable working height with equal length
legs. Spread the tripod legs and make the tripod head as level as
possible while at the same time placing the center of the tripod head
directly over the ground point. Press the leg feet firmly into the
ground and make sure the tripod legs are locked.
• Set the instrument carefully on the center of the tripod head
orientating the leveling screws centered with each tripod leg. Attach
the instrument to the tripod. Make sure the center mark is visible on
all three leveling screws (this ensures a complete leveling range).
• Adjust the Optical Plummet Eyepiece to focus the bullseye. Adjust the
Optical Plummet telescope focus to see the ground clearly. f you can
not see the ground point while looking through the optical plummet,
carefully lift two of the tripod legs, then pivot on the third leg,
carefully moving the tripod until the ground point is within one inch of
the reticule. Press the two tripod feet back into the ground and
recheck the optical plummet alignment. Repeat if necessary until the
ground point can be seen in the optical plummet field. Complete the
alignment by turning the leveling screws (you will not be level but
you are pointed correctly).
• Now center the instruments Circular Vial by carefully extending or
shortening the tripod legs closest to the bubble. Note: Use only two
legs. Repeat until alignment is within 6mm (1/4 inch) or better.
4430H-English_Manuals 2/22/11 11:08 AM Page 7

• Rotate the leveling screw 1, 2 to move the bubble to the center line
of circular level which is perpendicular to the connection line 1,2.
• Rotate the leveling screw 3 to move the bubble to the center of the
circular level.
• Next use the Tubular Vial to accurately level the instrument. Unlock
and turn the instrument so that the tubular vial is parallel to BC, any
two leveling screws. Note the direction to turn the leveling screws in
the graphic. When turning the two screws, adjust them equally. The
bubble will move in the direction that your left thumb turns. To move
the bubble to the right, turn the B leveling screw in and
simultaneously turn the C leveling screw in. To move the bubble left,
move both screws out simultaneously. Once centered turn the
instrument 90º over A leveling screw and turn screw A in or out until
bubble is centered. Go back to the first position BC, and repeat until
the bubble is centered in both positions. Then from position BC turn
180º to check the adjustment. f the bubble stays centered or within
1/4 division, you are level.
8©2011 Johnson Level & Tool
4430H-English_Manuals 2/22/11 11:08 AM Page 8

©2011 Johnson Level & Tool 9
• Now check the ground point centering. f you are not directly on the
point, carefully loosen the tripod fastener and move the instrument on
the tripod head in an x - y direction. Do not rotate the instrument.
Recheck leveling and repeat until instrument is level and over the
ground point at the same time. With practice, this becomes easier.
4430H-English_Manuals 2/22/11 11:08 AM Page 9

10 ©2011 Johnson Level & Tool
5. Using the Product
Turning on the Instrument
Press the power key on the instrument for 2 seconds
and all the symbols will be displayed on the LCD. The
buzzer will sound twice and the horizontal angle value
and “0-set” will be displayed. When “0-set” is
displayed none of the key pads operate except for the
power key. Rotate the telescope 360º to activate the vertical
measuring mode and to activate the keypad.
Battery Strength Indicator
The battery symbol on the LCD window displays the current
battery strength.
Full power
Effective battery
Effective battery
Weak voltage but still effective, suggest changing battery packs
Powers off automatically after symbol blinks. Replace the
battery pack or recharge it.
Battery Strength
4430H-English_Manuals 2/22/11 11:08 AM Page 10

Battery Replacement
Remove Battery Box
Replace Alkaline Batteries
• Push down the battery cover tab and pull the battery cover away
from the battery box.
• Take the old batteries out and put the new batteries in paying
attention to the “+” and “-” pole.
• Snap the battery cover back into place.
Placing the Battery Box on the Instrument
Place the projection on the bottom
of the battery box into the slot on
the instrument. Push the top of
the battery box until it clicks into
place.
©2011 Johnson Level & Tool 11
Battery Box Button
Push down to remove
the battery box
Hook
Battery Cover Battery Cover
4430H-English_Manuals 2/22/11 11:08 AM Page 11

12 ©2011 Johnson Level & Tool
Rechargeable Batteries
• Connect the charger to the AC outlet. Remove the battery box from
the instrument and insert plug of charger into the recharge socket
of battery box. A red indicator light on the charger means the
instrument is recharging. A green light means the instrument is
fully recharged.
• The plug should be pulled out from the rechargeable battery box
after the unit is recharged, the charger is equipped with an over-
charge protective circuit.
• Rechargeable batteries can be used repeatedly for 300-500 times.
Complete discharge of the battery will shorten the battery’s life.
• Recharge batteries at least once per month to keep its longest life.
Measurement of Angle
Observing in the “Normal” and “Reverse” positions of the telescope.
The normal, or direct, position of the telescope refers to observation
with the vertical circle opposite the battery door being on the left.
The reverse position refers to observation with the vertical circle
being on the right. The mechanical errors can be offset by averaging
the values measured in the normal and reverse positions.
4430H-English_Manuals 2/22/11 11:08 AM Page 12

©2011 Johnson Level & Tool 13
Using the Telescope
• Point the telescope at the target and focus the eyepiece until the
crosshair can be seen clearly.
• Aim the telescope coarsely using the targeting sight. Keep a slight
distance between the targeting sight and your eye when aiming
coarsely.
• Focus the telescope by turning the focusing knob on the telescope.
Horizontal Angle “0-set”
1. Aim at target “A” using crosshair in the telescope.
2. Press 0-Set key once to set reading of horizontal
angle 0º00’00”.
• 0-set key is only available for the horizontal angle.
• Horizontal angle can be set to “0” at any time
except when the horizontal angle is in the hold status.
Measuring Horizontal and Vertical Angle (HR, V or HL, V)
Horizontal angle right rotation increment and Vertical
angle measurement (HR, V)
1. Aim at the first “A” using the center crosshair.
2. Press 0-set key once to set the reading of
horizontal angle of target “A” at 0º00’00”.
3. Rotate the instrument clockwise and aim at the
second target “B” to get the horizontal and vertical
angle of target “B”.
4430H-English_Manuals 2/22/11 11:08 AM Page 13

14 ©2011 Johnson Level & Tool
Conversion between horizontal angle right (HR)
and left (HL) rotation
1. Aim at a target “A” using the center of crosshair
in the telescope.
2. Press the R/L key to change horizontal angle mode
from HR to mode HL.
3. Measure in mode HL.
• The R/L button has no effect to the vertical angle.
• Press the R/L button again, and the horizontal angle is transformed
back from HL to HR again.
Holding the Horizontal Angle
Press the HOLD button to hold the horizontal angle. The reading will
blink while being held. The reading of the horizontal angle will
remain unchanged even if the direction of telescope is changed.
Press HOLD button again, the hold of horizontal angle is released.
1. Rotate the instrument to the target.
2. Press the HOLD key once to lock the value of the
horizontal angle, the reading will flash.
3. Press the HOLD key again to unlock the reading.
• The HOLD key has no effect to the vertical angle.
4430H-English_Manuals 2/22/11 11:08 AM Page 14

©2011 Johnson Level & Tool 15
Measurement of Vertical Angle
The angle position can be set as required in the initial setting.
Display of Slope
1. Press the V/% key to switch the vertical
measurement shown from degrees to percent
of grade.
2. Press the V/% key again to switch from grade
percent back to the vertical measurement
shown in degrees.
ote: When vertical angle is converted to slope, the precision of the
slope reading is two digits after the decimal. The value of slope is
displayed only within a 45º (100%). When measure angle exceeds
100%, the percent will be shown as “----”.
0º
90º
180º
270º
90º
0º
270º
180º
4430H-English_Manuals 2/22/11 11:08 AM Page 15

16 ©2011 Johnson Level & Tool
Repeat Angle Measurement
1. Press the FUNC key.
2. Press the REP key to put the instrument in
repeat mode.
3. Aim at the first target “A” and press the 0-set
key once to set the first target reading 0º00’00”.
4. Rotate the instrument and aim at the second
target “B”.
5. Press the HOLD key to hold the horizontal
angle and store it in the instrument.
6. Rotate the instrument to aim at the target “A”
again. Press R/L key to release the angle
hold status.
7. Rotate the instrument to aim at the target
“B” again.
8. Press the HOLD key to hold the horizontal
angle and store it in the instrument. Double
and average angle-value will be shown on
the display.
9. Repeat the last three steps according to
measuring requirements.
10. f needed return back to normal angle measurement, press FUNC
key, and then press the HOLD key.
4430H-English_Manuals 2/22/11 11:08 AM Page 16

©2011 Johnson Level & Tool 17
• The reading of horizontal angle can accumulate to reach
+1999º59’59” when in repeat angle measurement mode.
• Repeat measurement does not function if the angle between two
targets is less than 30”.
• The repeat measurement should be limited to 15 times when the
instrument is in the repeat measuring mode, otherwise the error
Err-04 will be shown. Start again from step 1.
• Err-04 will show on the display when measuring >+30” during the
repeat measurement, then go back to step 1.
• Press the FUNC key, and then press the HOLD key to withdraw
from repeat measurement and back to the original status.
Switching Between Measuring Units
This instrument has three types of angle measurement units to
choose from: DEG, GON and M L and can be chosen in the
preliminary setting, or by following this procedure. Simultaneously
press R/L and V/%, the angle measurement units will switch between
DEG, GON and M L.
4430H-English_Manuals 2/22/11 11:08 AM Page 17

18 ©2011 Johnson Level & Tool
Other Functions
Measuring Distance Using the Stadia Method
Read the leveling rod using the stadia hair on the reticule of the
telescope. Multiply the reading by 100 to obtain the actual distance
L from the target to the measured point. (100 is the multiplication
constant error of the instrument, i.e. 1 = 1 x 100)
Tilt Sensor
This theodolite is equipped with a tilt sensor. The inclined angle of the
instrument will be compensated automatically by the tilt sensor. f the
instrument is inclined too much, a symbol “b” will be shown on the
display , this means the instrument exceeds the compensated range.
Level the instrument by hand.
To turn on the tilt sensor and hold the R/L button in for 3 seconds
after moving the telescope to get into vertical measuring mode. The
word “Tilt” will appear on the display. f the instrument is inclined
within +3º the tilt sensor can compensate the vertical angle. f the
inclination is greater than + 3º the instrument will display “b”.
Stadia Hair
4430H-English_Manuals 2/22/11 11:08 AM Page 18

©2011 Johnson Level & Tool 19
Sound Function
When the sound function is activated and the instrument is rotated,
the instrument will sound when the horizontal angle passes 0°, 90°,
180°, & 270°. Please refer to “initial setting” chapter to set horizontal
angle sound function.
Backlight LCD Telescope Reticle and Timing Power-Off
The display and telescope’s reticle on this theodolite are equipped
with a lighting device. Press the FUNC key twice to turn on the light.
Press the key twice again to turn it off. The instrument will
automatically turn off to save power if it has not received an
operation within 10 minutes, 20 minutes or 30 minutes. Please refer
to the “initial setting” section.
4430H-English_Manuals 2/22/11 11:08 AM Page 19

20 ©2011 Johnson Level & Tool
I ITIAL SETTI G
Initial Setting Instruction
The instrument has several settings for your option to meet different
requirements of measuring. After your purchase and before your
operation, do the initial setting for the instrument.
Item Setting
o.
1
2
3
4
5Measuring mode for
Vertical Angle
Setting measuring
mode for vertical angle
Setting 0
vertical angle
Setting 1
zenith angle
6Tilt sensor Set tilt function Setting 0
OFF
Setting 1
ON
7Data transmission Set data transmission
function
Setting 0
OFF
Setting 1
ON
Automatic
Shut-off
Setting interval for
automatic shut-off
without an operation
Angle unit Selecting angle display
unit DEG, GON, M L
Setting
0
DEG
Setting
1
GON
Setting
2
M L
Setting
3
DEG
Setting
0
OFF
Setting
1
10 min
Setting
2
20 min
Setting
3
30 min
Sound function Confirming sound
every 90º
Setting 0
OFF
Setting 1
ON
Reading resolution
(minimal reading
display unit)
40-6932
40-6935
Setting 0
1”
2”
Setting 1
2”
5”
Item Description Parameter Setting
4430H-English_Manuals 2/22/11 11:08 AM Page 20