Hach HQ440d, User Manual

Table 1  Spreadsheet column descriptions (continued)

Column header name

Data description and example values

Any settings that affect the
reading, for example
“NaCl/Non-Linear”

Reading Message 1–4 Any message that was shown during the measurement,
for example “Out of limits”.

Check Std Value

Value of the check standard that was used to verify accuracy, for example:
7.00 pH–25 ºC (pH, temp-compensated); 7.01 pH (pH, custom)

Check Std Units

Check standard units, for example μS/cm.

Note: pH is not displayed here as it is included in the previous column.

Check Std Graph

Bar-graph showing the measurement in relation to the acceptance limits.
Example: “6.901 <—|—> 7.101”.

Check Std Status

Status of the check standard reading. Example: “Reading within limits”,
“Reading outside limits”

Calibration Status

Status of the calibration that is in use. 

 = current calibration is valid; 

= calibration has expired.

Cal Date

Date of calibration reading: stored in user-defined date format

Cal Time

Time of calibration reading: stored in user-defined time format

Cal Operator ID

The operator ID specified when the probe was calibrated. Shows “- - -” if
undefined.

Cal Slope Name

Slope (pH or LDO) or cell constant (conductivity)

Cal Slope

The slope value for the calibration

Cal Slope Aux

Used by pH to give the percent of nominal slope

Cal Slope Units

Units of the calibration slope. Example: “mV/pH” for pH

Cal Offset

Calibration offset value

Cal Offset Units

Calibration offset units. Example: “mV” for pH.

Cal r²

Calibration correlation coefficient without a unit (may be blank)

Cal Number of Std’s

Number of standards used during calibration, for example 5. May be blank
depending on record type, parameter type, and method settings.

Cal Std 1 

Known value of the first calibration standard

Cal Std 1 Units

Units of the first calibration standard

Cal Std 1 Primary Value

Measured value of the first calibration standard

Cal Std 1 Primary Units

Associated units for the calibration measurement

Cal Std 1 Supp Value

Value of supplemental measurement, for example temperature

Cal Std 2–7 

Known value of additional calibration standards, if used

Cal Std 2–7 Units

Units of additional calibration standards, if used

Cal Std 2–7 Primary Value

Measured values of additional calibration standards, if used

Cal Std 2–7 Primary Units

Associated units for additional calibration measurements, if used

Cal Std 2–7 Supp Value

Value of supplemental measurement, for example temperature

Cal Std Supp Units

Units applicable to all secondary calibration readings. Example: “ºC” or “ºF” for
temperature

Cal Message 1–4 

Any messages about the calibration

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