Sitemark isn't generic field software. It's built around the workflow of the contractor holding an RL-H5A — from first setup to final as-built delivery. Log shots, track your calibration schedule, decode error codes, and hand inspectors a professional PDF without ever opening Excel.
Set calibration intervals for your RL-H5A and every receiver in your fleet. Sitemark alerts you before the due date — not after the inspector finds drift.
Log shots directly from the field. Point name, design elevation, actual rod reading, deviation, and pass/fail status — timestamped and GPS-tagged.
See actual vs. design grade plotted in real time as you log shots. Catch problems at the instrument, not at submittal.
When the job is done, hit one button. Sitemark generates a client-ready as-built PDF with your shots, deviations, equipment info, and signature block.
Reference guide for common RL-H5A error codes. Use Sitemark's AI Field Assistant for real-time troubleshooting in the field.
The instrument has exceeded its self-leveling range (±5°). The RL-H5A detected tilt it cannot compensate for automatically.
Fix: Set the instrument on a stable, flat surface. Use the built-in circular bubble to rough-level before power-on. Restart after repositioning.
The internal rotating head has stalled or failed. Often caused by impact, debris, or mechanical wear.
Fix: Power cycle the instrument. If E2 returns immediately, the rotating mechanism requires service. Do not force the head manually.
The RL-H5A cannot detect or communicate with the receiver (LS-80L, LS-80X, or LS-100D).
Fix: Confirm the receiver is powered on and within range. Check that the receiver face is aimed toward the laser plane. Verify battery level on both units.
Communication between the RL-H5A and an external device (remote or data collector) has been interrupted.
Fix: Check all cable connections. Confirm baud rate settings on the data collector (Topcon MAGNET Field or FC-6000) match the instrument settings.
The Topcon RL-H5A is a self-leveling horizontal rotary laser level designed for grade control across large construction sites. It's the industry standard for contractors who need reliable, long-range elevation reference without dual-slope capability.
| Leveling Type | Automatic self-leveling | Self-levels within ±5° of setup |
| Self-Leveling Accuracy | ±10 arcsec (±0.003'/ 100') | Equivalent to ±1/16" at 200 ft |
| Working Range | 800m diameter (with LS-80L receiver) | Long-range single operator grade control |
| Beam Type | Red visible laser | Use receiver in outdoor daylight |
| Rotation Speed | 600 rpm (fast); 300 rpm (slow) | Slow for machine control; fast for layout |
| Tilt Range | ±5° automatic self-leveling | Error alarm beyond ±5° |
| Grade Capability | Horizontal only (0% fixed) | Not for slope grading — use RL-HV2S for slopes |
| Battery | D-cell alkaline, 100+ hr runtime | Industry's longest battery life in class |
| IP Rating | IP66 | Dust-tight, protected against strong water jets |
| Operating Temp | -20°C to +50°C (-4°F to 122°F) | Full seasonal operation |
| Weight | 1.6 kg (3.5 lbs) with batteries | Tripod-mount only |
| Compatible Receivers | LS-80L, LS-80X, LS-100D | All tracked in Sitemark |
Step-by-step setup for single-operator grade control on any job site.
Set the tripod on firm, vibration-free ground. Stay 50+ ft from active heavy equipment — vibration causes the instrument to drift mid-job. Spread tripod legs wide for stability. Avoid soft or frost-heaved ground.
Thread the RL-H5A onto the tripod, tighten firmly, and power on. Wait 10–15 seconds for the automatic self-leveling to complete. The green ready indicator will light when the instrument is leveled and the beam is rotating.
Hold the grade rod on your benchmark, set the receiver to a convenient height, and slide it until you get the on-grade signal. Record this HI (Height of Instrument): benchmark elevation + rod height above benchmark. This is your elevation reference for all subsequent shots.
For each design point, calculate: target rod reading = HI − design elevation. Set the receiver to this reading when checking that point. On-grade signal means the ground is at design elevation.
Re-shoot the benchmark every 2–3 hours, after any nearby equipment impact or significant temperature change. If the HI has shifted, recalculate all target rod readings from the new HI.
Sitemark imports CSV exports from Topcon MAGNET Field directly — no reformatting required.
Set up your job in Sitemark with design elevations, benchmarks, and equipment assignments. Add your RL-H5A and receiver.
Use the Sitemark field app on your phone or tablet. Enter point name, rod reading, and design elevation. Deviation calculates automatically.
As shots come in, Sitemark plots your actual vs. design grade in real time. Flag deviations before they become rework.
When the job is complete, generate a professional as-built PDF — equipment info, shot table, elevation profile, and signature block included.
Calibration alerts, grade shot logging, elevation profiles, and as-built PDFs — built for the operator holding the laser.
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