When Should Myzox CL-28 CL-36 Auto Level Be Checked and Calibrated Malaysia
When Should Myzox CL-28 CL-36 Auto Level Be Checked and Calibrated Malaysia
The Myzox CL-28 and CL-36 Auto Levels are precision optical surveying instruments used for construction leveling, benchmark transfer, elevation measurement and civil engineering work.
Like other surveying instruments, an automatic level should be periodically checked to confirm that it is performing within the accuracy required for the job.
This becomes particularly important when the instrument is used regularly on construction sites, transported frequently or has experienced an accidental impact.
MTM Precision Sdn. Bhd. is an authorized distributor of Myzox in Malaysia, supplying Myzox surveying instruments and accessories for professional users.
Why Should an Auto Level Be Checked?
An auto level establishes a horizontal line of sight that allows operators to determine differences in elevation using a leveling staff.
If the instrument is out of adjustment, measurement errors may be introduced into work such as:
Foundation leveling
Finished floor level checking
Road formation
Drainage construction
Earthworks
Benchmark transfer
Infrastructure projects
General construction surveying
Because elevation errors may affect subsequent construction work, instrument accuracy should not be taken for granted.
When Should You Check a Myzox Auto Level?
There is no single checking interval that applies to every user.
The appropriate frequency depends on how the instrument is used, transported and stored.
However, an auto level should be considered for checking when:
It has been dropped
The tripod has fallen
The instrument has experienced a strong impact
Measurements become inconsistent
Results differ from a known reference
It has undergone frequent transportation
It is used intensively on construction sites
It has not been checked for an extended period
A project requires documented instrument verification
For critical engineering work, always follow the project's quality-control and calibration requirements.
Does a New Auto Level Need Checking?
Even a new surveying instrument should be checked before it is relied upon for critical work.
Transportation and handling can potentially affect precision equipment.
A basic field verification before starting an important project provides additional confidence that the instrument is functioning as expected.
Check the Instrument After a Drop or Impact
Construction sites can be challenging environments for surveying equipment.
An instrument can accidentally be:
Knocked by workers
Hit by equipment
Dropped during transportation
Exposed to strong vibration
Left on a tripod that falls over
After a significant impact, do not assume that the instrument remains correctly adjusted simply because there is no visible external damage.
Its measurement performance should be verified before it is used for critical leveling.
What Is a Two-Peg Test?
A two-peg test is a commonly used field procedure for checking the line-of-sight performance of an optical level.
The basic principle involves taking observations from different instrument positions and comparing the resulting elevation difference.
The test can help identify whether the line of sight requires further inspection or adjustment.
A two-peg test is useful as a field check, but it should not be confused with a complete professional calibration procedure.
Field Check vs Professional Calibration
These two terms are sometimes treated as if they mean the same thing, but there is an important difference.
Field Check
A field check helps the operator determine whether the instrument appears to be performing correctly.
Examples include:
Bubble inspection
Compensator behaviour check
Repeat-reading comparison
Two-peg test
Comparison against a known reference
Professional Calibration or Adjustment
Professional inspection may involve more detailed procedures, suitable reference equipment and documented results.
This may be required when:
Accuracy is outside acceptable tolerance
The instrument has experienced a serious impact
Project documentation requires calibration
The user requires a calibration certificate
Measurement reliability is uncertain
Myzox CL-28 Accuracy
The Myzox CL-28 provides:
Magnification: 28X
Objective Aperture: 36 mm
Minimum Focusing Distance: 0.4 m
1 km Double-Run Leveling Accuracy: ±2.0 mm
Self-Leveling Range: ±15′
Horizontal Circle: 360°
Weight: Approximately 1.3 kg
It is suitable for general construction and civil engineering leveling applications.
Myzox CL-36 Accuracy
The Myzox CL-36 provides:
Magnification: 36X
Objective Aperture: 36 mm
Minimum Focusing Distance: 0.4 m
1 km Double-Run Leveling Accuracy: ±1.0 mm
Self-Leveling Range: ±15′
Horizontal Circle: 360°
Weight: Approximately 1.3 kg
The CL-36 offers higher magnification and a higher specified leveling accuracy than the CL-28.
Does the CL-36 Need Checking Even Though It Is More Accurate?
Yes.
A higher instrument specification does not eliminate the need for checking.
The CL-36's ±1.0 mm specification assumes that the instrument is operating correctly and that proper surveying procedures are followed.
If an instrument becomes misadjusted, its original specification alone cannot guarantee accurate field results.
Warning Signs That an Auto Level May Need Inspection
Consider further checking if you notice:
Repeat measurements do not agree
Benchmark transfer does not close correctly
Different instrument positions produce unexpected results
Bubble behaviour appears unusual
The compensator does not appear to settle normally
The instrument has recently been dropped
Results disagree significantly with another verified instrument
Do not continue critical leveling work when there is reasonable doubt about the instrument's accuracy.
Why Calibration Matters for Contractors
Surveying errors can become construction errors.
For example, incorrect elevation information could potentially affect:
Concrete levels
Foundation elevations
Drainage gradients
Road formation
Earthwork quantities
Finished floor levels
The cost of checking a surveying instrument can be small compared with the cost of correcting construction work based on incorrect measurements.
How to Protect Your Myzox Auto Level
Good handling can help maintain instrument performance.
Recommended practices include:
Transport the instrument in its carrying case
Avoid unnecessary shock and vibration
Do not carry the instrument while attached to the tripod over difficult terrain
Keep the equipment dry and clean
Store it in an appropriate environment
Avoid forcing adjustment mechanisms
Check performance after unusual events
Arrange inspection when accuracy is uncertain
Frequently Asked Questions
How often should I calibrate my Myzox Auto Level?
The appropriate interval depends on usage, project requirements and working conditions. Instruments used heavily or for critical work may require more frequent verification.
Should I check the instrument before every project?
A basic field check before important work is good surveying practice, especially when the instrument has been transported between sites.
Do I need calibration after dropping an auto level?
The instrument should at least be checked after a significant drop or impact. If results are questionable, professional inspection is recommended.
Can a two-peg test replace calibration?
No. A two-peg test is primarily a field verification method. Professional calibration may be required when documented accuracy or adjustment is needed.
Is CL-36 more accurate than CL-28?
The CL-36 is specified at ±1.0 mm for 1 km double-run leveling, compared with ±2.0 mm for the CL-28.
Why does calibration matter?
Reliable instrument performance helps reduce the risk of incorrect elevation measurements being transferred into construction work.
Myzox CL-28 & CL-36 Auto Level Malaysia
MTM Precision supplies Myzox CL-28, CL-36 and professional surveying equipment in Malaysia.
As an authorized distributor of Myzox in Malaysia, we support contractors, engineers and surveyors who require professional surveying instruments and technical support.
Contact MTM Precision
MTM Precision Sdn. Bhd.
Showroom & Service Centre
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.
Website: www.mtmpre.com.my
Email: mtmpre@yahoo.com
WhatsApp: +6016-6607346
Contact MTM Precision for enquiries about the Myzox CL-28, CL-36 Auto Level and professional surveying equipment in Malaysia.
16 Aug 2026
