Daily Calibration – LDARtools

What this report does

Lists every daily calibration reading for each selected analyzer within the date range. Each row is one gas cylinder result from a calibration session — showing the analyzer, date, technician, calibration and confirmation times, cylinder, concentration, analyzer reading, percent difference, and whether the reading passed.

Use this report to verify that calibrations were performed, review readings and pass/fail results, and confirm cylinder and probe information for each calibration session. This report is in the Calibration folder on the Reports tab.

When to use it

Verifying that all analyzers had daily calibrations performed within a period.
Reviewing calibration pass/fail results for a specific analyzer or date.
Confirming cylinder serial numbers and expiration dates used during calibrations.
Producing a calibration record for an audit or regulatory submission.

Parameters

Parameter	Description	Required	How it filters
Start Date	Start of date window	Yes	Calibrations on or after this date are included
End Date	End of date window	Yes	Calibrations on or before this date are included
Analyzers	One or more analyzers to include	Yes	Only calibration records for the selected analyzers appear

Analyzer list is date-filtered. The Analyzers parameter only shows analyzers that have a calibration record in the database for the selected date range.

Columns

Column	What it shows	Format / Notes
Analyzer	Analyzer device name	Text; e.g., "phx42-1550"
Date	Date the calibration was performed	Date; displayed in facility local time
Tech Id	Name of the technician who performed the calibration	Text
Calibrate	Time the calibration reading began	Time (H:MM:SS AM/PM)
Confirmed	Time the calibration reading was confirmed (end time)	Time (H:MM:SS AM/PM)
Cylinder	Cylinder label or serial number	Text; the custom label assigned to the cylinder
Cyl. Exp.	Cylinder expiration date	Date
Probe Type	Probe type used	Text; "Standard" or "Extension"
Conc.	Cylinder gas concentration in PPM	Decimal
Reading	Analyzer reading in PPM	Decimal
Diff.	Percent difference between the reading and concentration	Percentage; see calculation below
Pass	Whether the calibration reading passed	"Yes" or "No"
Warmup	Time the analyzer was warming up before calibration	Duration in minutes (e.g., "16 min"); blank if no warmup recorded

What's included and excluded

Included:

All daily calibration readings for the selected analyzers within the date range.
One row per gas cylinder per calibration session.

Excluded:

Analyzers not selected.
Calibration records outside the date range.
Precision Calibration records (those appear in the Precision Calibration report).
Drift check records (those appear in Analyzer Drift or VVa Drift reports).

How key values are calculated

Diff.

For span gas cylinders:

Diff. = 100 − (Reading ÷ Concentration × 100)

A reading equal to the cylinder concentration produces a Diff. of 0%. A reading below concentration produces a positive Diff.; above produces a negative Diff.

For zero gas cylinders (0 PPM target):

Diff. = Reading × 10

Zero gas readings are near zero PPM; the × 10 factor scales small deviations to a visible percentage.

Warmup

The number of minutes from when the analyzer was powered on (warm-up start) to when the calibration session began.

Tips and common questions

"Analyzer is not showing in the list." The Analyzer parameter only populates analyzers that have calibration records in the database for the selected date range. If an analyzer is missing, confirm that calibration data was uploaded for it.
"Some rows show Pass = No." A failed calibration means the reading fell outside the acceptable tolerance for that cylinder. The Diff. column shows how far the reading was from the cylinder concentration.
"Warmup is blank for some rows." If the analyzer's warm-up start time was not recorded (older records or certain analyzer models), the Warmup column will be blank.
"There are multiple rows per analyzer per date." Each calibration session spans multiple gas cylinders. Each cylinder produces one row. A typical calibration session might include a zero gas and two or three span gases.
"How is this different from Daily Calibration – Form 2?" This report shows a Confirmation Time (when the reading ended) and a Warmup duration. Daily Calibration – Form 2 instead shows the Probe Flow rate and the Warm-Up start time.

Sample output (click here for PDF sample report)

Report run for Example Facility, Start Date: 1/30/2023, End Date: 1/30/2023, Analyzer: phx42-1934.

What the rows illustrate:

phx42-1934 (CT-24077, Zero gas) — Zero gas calibration; Conc. = 0, Reading = 1.63, Diff. = 1.63%.
phx42-1934 (CT20546) — Span gas at 9,923 PPM; reading over 1% of concentration.

Output format

One row per gas cylinder per calibration session, ordered by date, analyzer, and cylinder concentration. Suitable for on-screen viewing, PDF, and Excel export.

Daily Calibration – Form 2 — same calibration data with Probe Flow and Warm-Up start time instead of Confirmation Time.
Daily Cal with Maintenance Checklist — same calibration data with an additional analyzer self-check diagnostic section appended.
Analyzer Drift — drift check readings taken during the day, tied to the same calibration session.
VVa Drift — drift checks performed using the VVa method.
Precision Calibration — response time and precision measurements for each analyzer.