In the Tag Calibration Settings window, if you use the Standard Settings calibration form, the following fields are available. Note that database column names may be modified by expressions where particular behavior is required. For information about customizing the form using InfoMaker, see Calibration Form Customization.
General
This section displays general instrument tag properties. The database columns in this section all belong to the COMPONENT table. All the values are read-only.
Name of Field |
Database Column Name |
Description |
---|---|---|
Tag number |
cmpnt_name |
Displays the tag number of the selected instrument. |
Service |
cmpnt_serv |
Displays the tag number service, if available. |
Serial number |
spec_cmpnt_sn |
Displays the serial number of the instrument, if available. This field may be editable according to the option specified under Serial number, manufacturer and model for the Allow to update property in Preferences > Calibration and Maintenance > General. |
Function |
cmpnt_func_type_id |
Displays the process function of the instrument, as defined by the instrument type description. |
Location |
cmpnt_loc_id |
Displays the instrument location, for example: Field, Equipment Room. |
Ranges
This section applies to all instruments except for control valves. The database columns in this section and in the following sections all belong to the CALIBRATION_SETTING table. The calibration ranges that you enter for the current instrument tag are a prerequisite for the calibration procedure. The calibration ranges serve as a reference for the calibration performed on the selected tag.
Name of Field |
Database Column Name |
Description |
---|---|---|
Variable min. |
calib_range_min |
Type the minimum input calibration value. |
Units of measure |
calib_range_uom_min |
Accept the default %, or for an absolute value, select the required unit of measure for the variable minimum. Note that you can also select %LEL (lower explosive limit). |
(Pressure condition) |
calib_range_uflg_min |
If you selected a pressure unit of measure, select the required pressure condition: Gage, Absolute, or blank. For a volumetric flow unit of measure, select from: @ Flow; @ Normal; Standard; or Base. |
Variable max. |
calib_range_max |
Type the maximum input calibration value. |
Units of measure |
calib_range_uom_max |
Accept the default %, or for an absolute value, select the required unit of measure for the variable maximum. Note that you can also select %LEL (lower explosive limit). |
(Pressure condition) |
calib_range_uflg_max |
If you selected a pressure unit of measure, select the required pressure condition: Gage, Absolute, or blank. For a volumetric flow unit of measure, select from: @ Flow; @ Normal; Standard; or Base. |
Output signal min. |
calib_set_output_min |
Type the minimum output value. |
Output signal max. |
calib_set_output_max |
Type the maximum output value. |
Output signal UOM |
calib_set_output_uom |
From the list, select the unit of measure for the output signal. |
Output type |
calib_output_flg |
Select the required signal output type: Linear or SQRT (square root signal output for flow instruments only). |
Allowed leak rate (available for control valves only) |
calib_set_leak_rate_al |
Type a value for the allowed leak rate for the valve. |
Units of measure |
calib_set_leak_rate_al_uom |
Allows you to enter the units of measure for the allowed leak rate, when available. It is up to you to select units of measure that are appropriate. |
(Pressure condition) |
calib_set_leak_rate_al_uom_ufl |
If you selected a pressure unit of measure for the allowed leak rate, select the required pressure condition: Gage, Absolute, or blank. |
Errors / Points
This section allows you to define various parameters related to error tolerances, and to specify the measurement points used to calculate the errors.
Name of Field |
Database Column Name |
Description |
---|---|---|
Calibration type |
calib_type_id |
From the list, select a calibration type appropriate for the instrument you are calibrating and for the type of calibration you want to perform. The available options are:
|
Number of points |
calib_set_no_point |
Allows you to enter the required number of calibration points by means of the spinner or by typing a value. The available values depend on the calibration type that you select. When in the Direction field you select Increase-Decrease, the calculation method for the number of points is as follows: The value entered in the Number of points field, multiplied by 2 minus 1. For example, if you entered 6 in the Number of points field then the actual number of points would be 11 (6 x 2 - 1=11). |
Measuring point (available only when a single point is defined for calibration) |
calib_set_single_pnt_level |
You must type the calibration point value in this field when using a single calibration point. |
Direction (not available for single point calibration types) |
calib_pnt_direction |
Displays the direction of the input value when making consecutive measurements: Increase, Decrease, or Increase- Decrease. The available options depend on the calibration type that you select. |
Error type |
calib_error_percent_flg |
Select one of the following error types:
Where i = calibration point number You are required to set values for upper tolerance and lower tolerance. You have the option to set either or both intermediate tolerance bounds as well. If the calculated value falls outside the bounds of the upper or lower tolerance bounds, the software highlights the result in red. If the result is within these bounds, but falls outside the intermediate bounds, the software highlights the result in light blue. |
Upper tolerance |
calib_error_percent |
Type the upper tolerance value or percentage of the permissible calibration error. |
Intermediate upper |
calib_sub_upper_error |
Allows you to enter the intermediate upper tolerance value or percentage of the permissible calibration error. |
Lower tolerance |
calib_error_percent_low |
Type the lower tolerance value or percentage of the permissible calibration error. |
Intermediate lower |
calib_sub_lower_error |
Allows you to enter the intermediate lower tolerance value or percentage of the permissible calibration error. |
Tolerance units of measure |
calib_error_percent_uom |
Allows you to select a percentage or absolute value for the tolerance units of measure. Note that you can also select %LEL (lower explosive limit). |
(Pressure condition) |
calib_error_percent_uom_uflg |
If you selected a pressure unit of measure for the tolerance, select the required pressure condition: Gage, Absolute, or blank. |
Set value 1,2,3,4 (available only if under Calibration type you selected Switch Set Point) |
cmpnt_set_point_l; cmpnt_set_point_ll; cmpnt_set_point_h; cmpnt_set_point_hh |
Enter the calibration point values and directions for each of the switch points. The units of measure are those specified in the Tolerance units of measure field. The number of set point fields available depends on the value that you selected for Number of points. |
Direction |
cmpnt_set_point_l_dir; cmpnt_set_point_ll_dir; cmpnt_set_point_h_dir; cmpnt_set_point_hh_dir |
Displays the direction for the specified switch setting: Increase, Decrease, or Increase- Decrease. |
Calculate in loop error |
calib_set_required_flg |
To include the calibration error of the current instrument tag in the total loop calibration error, select Yes. To exclude the calibration error of the current tag from the total loop calibration error, select No. |
Procedure number |
procedure_no |
If a number exists that identifies the particular calibration procedure that you are performing, you can enter the number in this field. |
Scales
This section allows you to specify the display scales shown on the DCS or the instrument, which may differ from the actual values of the readings; for example, a display scale may represent a range of rpm values from 0-5000, but the scale itself displays numbers from 0-5 (with each unit corresponding to 1000 rpm). In this case, you would enter minimum and maximum values of 0 and 5 respectively. If needed, you can specify parameters for two display scales. Values for display scale 1 only are shown.
Name of Field |
Database Column Name |
Description |
---|---|---|
Minimum |
disp_scale1_min |
Type the lowest value for the range specified by the scale. |
Maximum |
disp_scale1_max |
Type the highest value for the range specified by the scale. |
Units of measure |
disp_scale1_uid |
Select the required unit of measure. |
(Pressure condition) |
disp_scale1_uflg |
If you selected a pressure unit of measure, select the required pressure condition: Gage, Absolute, or blank. |
Set Point
The set point is used for calibrating a pressure switch, and to work with the set point values, you must select for Calibration type the value Alarm / Trip / Set Point Calibration Error. You can either define the set point to be identical with one of the calibration points ( First Point, Second Point, and so forth) or you can enter an independent value.
Name of Field |
Database Column Name |
Description |
---|---|---|
Point |
calib_set_point_flg |
Select one of the following options:
The rest of the fields in this section are enabled only if you selected Free from the Point list. |
Description |
calib_set_point_desc |
Type a description if needed. |
Direction |
calib_set_point_dir |
Allows you to select the output direction: Increase or Decrease. |
Point value |
calib_set_point_value |
Type the process value for the set point. |
Units of measure |
calib_set_point_uom |
Allows you to select the point value units of measure. |
(Pressure condition) |
calib_set_point_uom_uflg |
If you selected a pressure unit of measure, select the required pressure condition: Gage, Absolute, or blank. |
Minimum |
calib_set_point_min |
Type the minimum set point value, which defines 0% on the measurement range used for calculating the set point As Found and As Left errors. |
Maximum |
calib_set_point_max |
Type the maximum set point value, which defines 100% on the measurement range used for calculating the set point As Found and As Left errors. |
Alarm / Trip Points
This section allows you to define alarm and trip settings. You can specify up to six different alarm or trip points. The values you enter appear in the Alarm / Trip Points Summary Window read-only window.
Name of Field |
Database Column Name |
Description |
---|---|---|
Type |
trip_set_hihihi_flg |
Allows you to select the required point type: Alarm, Trip, Other, or None. The point type appears in various reports. |
Point level |
calib_set_5_id |
Allows you to select the required point level. Six shipped points are available: Hi-Hi-Hi, Hi-Hi, Hi, Lo, Lo- Lo, and Lo-Lo- Lo. You can define new points or modify the names of the existing points on the Calibration Points dialog. |
Description |
trip_set_desc_hihihi |
Type a description if needed. |
Direction |
trip_set_dir_hihihi |
Allows you to select the output direction: Increase or Decrease, to indicate whether the alarm or trip action occurs when the measured variable is increasing or decreasing. For example, if the instrument that you are calibrating indicates the liquid level in a tank, you can specify that an alarm will register at a certain value only when the liquid level is falling. |
Point value |
trip_set_point_hihihi |
Type the process value for the alarm or trip. |
Units of measure |
trip_set_uom_hihihi |
Allows you to select the appropriate point value unit of measure. |
(Pressure condition) |
trip_set_uom_hihihi |
If you selected a pressure unit of measure, select the required condition: Gage, Absolute, or blank. |
Minimum |
trip_set_min_hihihi |
Type the minimum point value, which defines 0% on the measurement range used for calculating the alarm or trip As Found and As Left errors. |
Maximum |
trip_set_max_hihihi |
Type the maximum point value, which defines 100% on the measurement range used for calculating the alarm or trip As Found and As Left errors. |
Other Alarm / Trip points follow suit as indicated in the table below (only the Type and Point level properties are shown):
Type |
Point Level |
---|---|
trip_set_hihihi_flg |
calib_set_5_id |
trip_set_hihi_flg |
calib_set_1_id |
trip_set_hi_flg |
calib_set_2_id |
trip_set_lo_flg |
calib_set_3_id |
trip_set_lolo_flg |
calib_set_4_id |
trip_set_lololo_flg |
calib_set_6_id |