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FAQ
Survey Equipment FAQ
Answers to common questions about precision survey equipment, brands, buying decisions, and technical specifications.
The questions contractors ask most: which laser level for grading work, what receiver pairs with which laser, how accurate a rotary laser really is, and whether it is worth buying a kit versus a bare tool. Each answer below is written from real product specs, not marketing copy.
Equipment Type FAQs
- Rotary Laser Level FAQ: Everything Contractors AskRead FAQ →
Rotary laser level FAQ: setup, range, accuracy, battery life, indoor vs outdoor use, detector use, and how to choose between top models like Topcon RL-H5A and Spectra LL500.
- Pipe Laser FAQ: Grade, Setup, and Common IssuesRead FAQ →
Pipe laser FAQ for plumbers and utility contractors: setting grade, reading the target, troubleshooting beam deviation, choosing between models, and accuracy for sewer and drain work.
- Total Station FAQ: Setup, Operation, and TroubleshootingRead FAQ →
Total station FAQ for contractors: how to set up, occupying a point, backsight errors, stakeout mode, robotic vs conventional, EDM troubleshooting, and model comparisons.
- GPS/GNSS Receiver FAQ for Construction ContractorsRead FAQ →
GPS and GNSS receiver FAQ for construction: RTK vs GNSS, accuracy specs, network corrections, base and rover setup, multipath errors, and model selection for layout and machine control.
- Machine Control System FAQ for Grading ContractorsRead FAQ →
Machine control FAQ for grading contractors: 2D vs 3D systems, GPS vs laser control, design file setup, blade accuracy, system components, and troubleshooting common issues.
Brand FAQs
- Topcon Equipment FAQ: Common Questions AnsweredRead FAQ →
Topcon equipment FAQ: model comparisons, software compatibility, error codes, service and calibration, battery systems, accessories, and which Topcon instrument is right for your work.
- Trimble Equipment FAQ for Construction ProfessionalsRead FAQ →
Trimble equipment FAQ: S series vs SX total stations, R series GNSS, Trimble Access software, GCS900 machine control, data collector compatibility, and service options.
- Leica Equipment FAQ: Setup, Accuracy, and TroubleshootingRead FAQ →
Leica equipment FAQ for construction: TS vs MS total stations, GS18 GNSS, iCON machine control, Captivate software, accuracy specs, service, and common error troubleshooting.
- Spectra Precision Equipment FAQRead FAQ →
Spectra Precision FAQ: LL500 vs Topcon RL-H5A, LP52G pipe laser, ST series total stations, FOCUS series, receiver compatibility, and where to buy Spectra equipment.
Buying Guide FAQs
- Buying Survey Equipment FAQ: New vs Used, Warranty, SupportRead FAQ →
Survey equipment buying FAQ: new vs used instruments, what warranty covers, how to evaluate used equipment, rent vs buy analysis, where to buy, and what questions to ask before purchasing.
- What Is a Pipe Laser and How Is It Used?Read FAQ →
Pipe laser explained: what it is, how it controls grade for sewer and drain installation, and how it differs from a rotary laser.
- What Is a Total Station and How Is It Used in Construction?Read FAQ →
Total station explained: what it is, how it measures angles and distances, and how construction crews use it for layout, stakeout, and as-built survey.
- What Is GPS Machine Control and How Does It Work for Grading?Read FAQ →
GPS machine control explained: how it works on dozers, graders, and excavators to achieve automatic grade without stakes or grade checkers.
- What Is RTK GPS and How Does It Work for Construction?Read FAQ →
RTK GPS explained: what Real-Time Kinematic positioning is, how it achieves centimeter accuracy, and how it's used for construction stakeout and machine control.
- How Does Machine Control Work on Construction Equipment?Read FAQ →
Machine control explained: how GPS and laser machine control works on excavators, dozers, and graders to achieve automatic grade control.
Technical FAQs
- Survey Equipment Calibration FAQ: How Often, Who Does ItRead FAQ →
Survey equipment calibration FAQ: how often to calibrate lasers and total stations, what calibration covers, how to do field checks, calibration cost, and how to find authorized service centers.
- GPS Accuracy for Construction FAQ: RTK, GNSS, and TolerancesRead FAQ →
GPS accuracy for construction FAQ: what RTK accuracy you can expect, how PDOP affects results, when GPS isn't good enough, multipath and obstruction effects, and how to verify accuracy on site.
- How Accurate Are Laser Levels? Understanding Specs and Real-World PerformanceRead FAQ →
Laser level accuracy explained: what arc seconds mean, how accuracy is stated in manufacturer specs, and what accuracy you need for different applications.
- Laser Level Accuracy FAQ: What to Expect on the Job SiteRead FAQ →
Laser level accuracy FAQ: what arc seconds mean in practice, what accuracy different jobs need, how to check calibration, what degrades accuracy, and which models deliver the best results.
- Machine Control Accuracy FAQ: What Grading Contractors Need to KnowRead FAQ →
Machine control accuracy FAQ: what blade accuracy to expect from GPS and laser systems, how to verify grades, common accuracy issues, and how to interpret machine control specs for earthwork and concrete.

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Gradelog is the field-execution platform built for grading and earthwork crews. Log grade shots, track cut/fill, document phases with photos, and generate as-built reports — from the cab to the office.
- Grade shots & cut/fill tracking per job
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