Help Guide

1. Register Your Logger

1. Create an account or sign in at dashboard.contemp.live.
2. Register the logger by scanning its QR code, or enter its serial number and DUID.
3. Follow the registration wizard: name the logger, choose °C or °F and set your alarm limits.

If the logger is already registered to another account, you can request an ownership transfer: the current owner is notified and approves it.

2. Connect to the Cloud

• Cellular is built in and works out of the box. No gateway and no site network are needed.
• WiFi is for sites without cellular coverage, such as Starlink-only sites, tunnels and mines. Long-press SYNC to start setup, join the logger’s setup hotspot from a phone or laptop, pick your 2.4 GHz network and enter the password.
• WPA2-Personal, WPA3-Personal and WPA2/WPA3 mixed mode work; Enterprise and captive-portal networks do not. The logger gets its IP address from the router (DHCP).
• Once WiFi is set up, the logger uses it first, automatically, and uses cellular when WiFi is not available.

3. Place the Sensors

• Two embedded sensors, white (SENWHT) and black (SENBLK), plug into the logger. Only these two are used for maturity; the ambient sensor shows the air temperature for context.
• Put one sensor where strength must be certified, usually deep in the section, which runs warmest. Put the other near the exposed face, which is coldest. Formwork comes off on the colder one, so make it the primary sensor.
• Name the sensors with the plastic tags and the permanent marker from the accessory pack.
• Each sensor has a 1.5 m (4.9 ft) lead. CONTEMP extensions (EXTBLK, EXTWHT) take a leg up to 16.5 m (54 ft) in total; keep the two legs within 3 m (10 ft) of each other.
• Sensors are sacrificial and stay in the concrete. Use original CONTEMP sensors only: with any other sensor the logger blinks red and blue and will not work.

4. Batteries and Enclosure

• 4 × AA batteries: alkaline (as shipped) or Energizer Ultimate Lithium.
• No tools needed: undo the two stainless-steel D-shaped screws at the bottom by hand, open the enclosure gently, replace the batteries and refit the screws.
• Battery life depends on the length of the pour, the reporting interval, the signal and the temperature, so we do not quote a figure per pour. Spare batteries come in every accessory pack.
• The enclosure is rated IP67.

5. Alarms

• Min/Max alarms on each channel.
• Differential alarms: white vs black sensor, white sensor vs ambient, black sensor vs ambient. Enter the gap that may not be exceeded; leave a box empty to switch that pair off.
• Alarms are sent by email (free) and by text message (uses the logger’s alert credit). Repeat notifications are limited to one per hour per logger.

6. User Access and Permissions

Share a logger with as many people as you need, at no extra cost. Each person has their own free account and notification settings. Only the logger’s owner can share it.

• Editor — Changes settings and thresholds and acknowledges alarms. Cannot share the logger.
• Viewer — Sees temperature and maturity data and reports and receives alarms, but cannot change settings.
• Silent Viewer — Sees all monitoring data without receiving notifications, useful for large teams or regulators.
• Service & Maintenance — For trusted service partners: files service reports and acknowledges alarms without changing your settings.

7. Graphs and Data

• View and analyze historical temperature data through interactive graphs.
• Explore data trends for different time periods to understand temperature fluctuations.
• Paginated readouts for complete timestamped sensor records.
• Toggle sensors on and off to focus on specific measurements for comparison.

8. Logger Reports

• Detailed results — Every reading, exported to Excel.
• Hourly report — Readings at the interval you choose, using the closest actual reading.
• Min/Max/Average daily report — Summarized daily readings.
• Multi-sensor data consolidation — Several sensors or loggers in one synchronized report, aligned by the closest existing reading or by linear interpolation.

Reports export to PDF or Excel and can be scheduled to arrive automatically.

9. Concrete Maturity: Formulas and Pours

Open the Concrete section of the dashboard. It has two parts: Calibration formulas and Projects.

Calibration formulas

• One formula per mix: its strength-maturity curve (not a sensor’s calibration certificate).
• Choose the maturity function: Nurse-Saul, with a datum temperature (ASTM C1074 recommends 0 °C (32 °F) when none has been determined by test; −10 °C (14 °F) is the classic alternative), or Arrhenius, with an activation parameter and a reference temperature (23 °C (73 °F) by default). The method is locked once the formula is saved.
• Enter the maturity and strength pairs from your specimen breaks and choose the curve: straight lines between points, logarithmic (3 or more points) or hyperbolic (4 or more points). The curve and its R² are previewed as you type.
• Longest gap to bridge (default 180 minutes, minimum 60): a longer logger silence earns no curing credit. Maximum probe temperature (default 80 °C (176 °F)): readings above it are treated as a fault.
• Once a pour uses a formula, its numbers are locked. To use a new curve, create a new formula and assign it; that sensor is recalculated from the pour start.

Projects (pours)

1. The pour: title, location, logger and pour start date and time.
2. The sensors: label, formula, which one is primary and which count toward completion.
3. The target: a target strength or a target maturity.
4. Review, then start monitoring.

• Statuses: Not started, Running, Disconnected, Completed, Stopped, Error, Device access lost.
• Progress is the lowest of the sensors that count toward completion, so the pour is complete when the last of them reaches the target.
• Figures refresh a few minutes after the logger uploads, and no more often than about every 12 minutes. Skipped intervals are counted and shown.
• When the target is reached, a completion email goes to the owner and everyone the logger is shared with (except Silent Viewers), and a text message to the project owner’s verified phone if the logger has alert credit. It is sent once per pour.

Pour reports

• Issued for finished pours only, and always covering the whole pour.
• PDF pour record: the pour’s particulars, each sensor’s formula and parameters, the calibration curve, a day-by-day table, the site photo and the temperature, maturity and strength charts, on the letterhead of the pour’s owner.
• Excel: a summary plus every raw reading, with running maturity and strength.
• Download the reports before you unclaim a logger: unclaiming deletes its readings.

10. Activity Log

• Every setting change, alarm and upload is recorded in the logger’s activity log; sign-ins are recorded at account level.
• The log is tamper-proof and can be downloaded as a PDF for compliance and auditing.