Sokkia Auto Level Gives Different Readings Checking and Calibration for Johor Contractors Malaysia
Sokkia Auto Level Gives Different Readings Checking and Calibration for Johor Contractors Malaysia
Does your Sokkia Auto Level give different readings when you repeat a measurement?
Before assuming the instrument needs calibration, check whether you are comparing observations made under the same conditions.
A difference may involve tripod movement, staff positioning, focusing, the reference point or instrument performance.
For contractors in Johor, identifying the symptom helps determine whether setup correction, checking or repair is appropriate.
1. Did the Instrument Position Change?
A staff reading depends on the height of the instrument's line of sight.
If you move and set up the Auto Level again, the reading at the same point may change because the instrument height has changed.
Different raw readings after a new setup do not automatically indicate an accuracy fault.
Compare the calculated results using the correct levelling procedure rather than expecting every setup to produce the same staff reading.
2. Is the Tripod Settling?
If readings change while the instrument remains in place, inspect the support.
Possible causes include:
Tripod feet sinking into soft ground
Loose leg clamps
Movement around the setup
Accidental contact with the tripod
Check the circular bubble again if the setup may have moved.
Do not rely on observations taken from a disturbed setup without rechecking it.
3. Is the Staff on the Same Point?
Confirm that the staff base is placed on the exact point being compared.
A small change in position can matter on:
Sloping concrete
Uneven ground
Loose stones
Drain edges
Rough surfaces
Also inspect the staff for slipping sections or damage.
A changing contact point can produce changing readings without an instrument fault.
4. Is the Staff Held Correctly?
A tilted or moving staff can affect the observation.
The staff operator should maintain the required position using the appropriate field procedure.
If a staff bubble is used, check its condition and suitability.
Do not assume that replacing or calibrating the Auto Level will resolve inconsistent staff handling.
5. Check Focusing and Parallax
The crosshairs and staff image should both appear clear.
Follow the model's prescribed focusing procedure. If the crosshairs appear to move against the staff image when your eye position changes, parallax may remain.
Resolve focusing problems before recording readings.
A blurred image or unresolved parallax can make repeated observations difficult to compare.
6. When Should the Instrument Be Checked?
Arrange an assessment if inconsistent results continue after suitable setup checks, particularly when:
A repeatable accuracy check shows a discrepancy
The instrument has been dropped
The circular bubble or controls appear abnormal
The instrument behaves inconsistently on stable ground
Visible damage or internal moisture is present
For Sokkia B20 or B40A instruments, provide the exact model and describe the conditions under which the problem occurs.
Checking, Calibration or Repair?
FindingNext stepReadings differ after changing instrument heightReview the levelling calculation and comparisonTripod or staff movesCorrect the setup and repeat observationsStaff image or crosshairs are unclearFollow the prescribed focusing procedureAccuracy remains in doubtArrange instrument checkingMeasurement error is confirmedAssess adjustment and calibration requirementsA component is damaged or malfunctioningAssess repair requirements
Checking identifies the problem. Calibration evaluates accuracy. Repair addresses a fault.
The appropriate service depends on the assessment.
Sokkia Auto Level Checking for Johor Contractors
Contact MTM Precision for Sokkia Auto Level checking, calibration and repair enquiries.
Contractors in Johor Bahru, Pasir Gudang and Kulai can discuss assessment and delivery arrangements with our Puchong Showroom & Service Centre.
WhatsApp a clear instrument photo, model label and description of the changing readings. Include whether the instrument stayed in one position or was set up again.
MTM Precision Sdn Bhd
Showroom & Service Centre:
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong, 47160 Puchong, Selangor, Malaysia.
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
05 Oct 2026
