Meter Primitive -- Numeric Reading
How to enter numeric measurements and compare them against compliance thresholds for tasks like waterline testing.
Overview
The Meter primitive is used for compliance tasks that require recording a numeric measurement and comparing it against a defined threshold. If the reading exceeds the allowed limit, the system flags a variance and requires a remediation note.
How It Works
When you open a task that uses the Meter primitive, the completion form displays:
Threshold Display
Above the input field, the system shows the threshold requirement in a human-readable format:
Must be < 500 CFU/mL
The display combines the comparison operator, threshold value, and unit. The supported operators are:
| Operator | Symbol | Meaning |
|---|---|---|
lt | < | Less than |
gt | > | Greater than |
lte | ≤ | Less than or equal to |
gte | ≥ | Greater than or equal to |
eq | = | Equal to |
Reading Input
A numeric input field labeled Reading where you enter the measured value. The unit of measurement (e.g., "CFU/mL") is displayed next to the input field.
As you type:
- A green checkmark appears if the reading meets the threshold
- A red warning triangle appears if the reading exceeds the threshold (variance detected)
Variance Handling
If the reading triggers a variance (fails the threshold check), a remediation prompt appears with a required note field. You must describe the corrective action taken before the task can be submitted.
The prompt shows a reason such as "Threshold breached" along with the actual value and the expected range.
Submission
The footer button reads Save Reading. After submission:
- A reading that meets the threshold sets the task status to Completed
- A reading that exceeds the threshold sets the task status to Completed with Failure and the remediation note is recorded
Evidence Fields
In addition to the numeric reading, the task may require supporting evidence:
- Notes -- Additional context about the measurement conditions
- Photo -- A photo of the test device, meter display, or lab results
- Documents -- Lab reports or test certificates
See Uploading Evidence for details on evidence requirements.
Dental Practice Examples
CDC guidelines recommend dental unit waterlines contain fewer than 500 CFU/mL of heterotrophic bacteria. After running an in-office paddle test or receiving mail-in lab results, enter the CFU/mL reading. If the reading is 500 or above, the system flags a variance and you must document your remediation plan (e.g., "Shocked waterlines with treatment solution, will retest in 48 hours").
Some compliance requirements involve verifying that sterilization equipment reaches the correct temperature. Enter the measured temperature and the system compares it to the required threshold.
Regular pressure gauge readings on dental air compressors can be tracked using the Meter primitive to ensure they remain within safe operating ranges.
Last updated Mar 13, 2026
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