ABB TB82PH Instructions d'exploitation télécharger pdf (Page 37)

I-E67-TB82FF-2A February 13, 2002

Note.

A) PRIMARY_VALUE_TYPE parameter establishes the type of measurement the device is performing. The

default measurement type is Conductivity. When writing to this parameter (i.e., switching the device

measurement type to Concentration), the device should be kept in OOS mode until all the necessary TB

and AI variables are properly configured.

B) PRIMARY_VALUE is the output from the TB and the default input for AI1. This value is used by the

XD_SCALE parameter. Both parameters carry the same Engineering Unit (as shown in the

PRIMARY_VALUE_RANGE Unit Index).

C) PRIMARY_VALUE_RANGE parameter is read only in the TB. The PRIMARY_VALUE_RANGE is not

changed when the XD_SCALE of an AI that is mapped to the PV channel is modified. The

PRIMARY_VALUE_RANGE unit is changed when the XD_SCALE unit of an AI that is mapped to the PV

channel is modified.

D) The SOLUTION selections are restricted by the SENSOR_GROUP that is configured. For Group A, all

selections are available. For Groups B and C, only User Defined is available.

E) TEMP_AUTO_SOL selections are restricted by the SENSOR_GROUP that is configured. For Group A, all

selections except for Pure H2O are available. For Group B, Standard KCl, TC Coefficient and User Defined

are available. For Group C, Standard KCl, TC Coefficient, Pure H2O and User Defined are available.

F) TEMP_PURE_H2O selections are only available when TEMP_COMP_TYPE is set to Auto and Pure H2O

is selected for TEMP_AUTO_SOL.

G) TC_COEF parameter is only valid when TEMP_COMP_TYPE is set to Auto and TC Coefficient is selected

for TEMP_AUTO_SOL.

H) USRDEF_TC_CURVE parameters are only valid when TEMP_COMP_TYPE is set to Auto and User

Defined is selected for TEMP_AUTO_SOL. Default values are in degrees Celsius and conductivity ratios.

I) USRDEF_CONC and CONCENTRATION_RANGE parameters are only valid when SOLUTION is set to

User Defined. Default values are in µS/cm and percent concentration.

J) MANUAL_TEMP_SETPOINT or TEMP_CAL_POINT parameters are to set the temperature value for

Manual Temperature Compensation (i.e., when TEMP_COMP_TYPE is set to MANUAL).

K) AI OUT variable can only be written when the AI is set to the Manual Mode.

L) AI XD_SCALE and OUT_SCALE parameters:

1) When the AI channel is set to the PRIMARY_VALUE, the XD_SCALE and OUT_SCALE parameters of

the AI use the values established by the PRIMARY_VALUE_RANGE. Therefore, the XD_SCALE and

OUT_SCALE parameters are dependent on the selection for the PRIMARY_VALUE_TYPE.

2) When the AI channel is set to the SECONDARY_VALUE_1 (Temperature), the XD_SCALE and

OUT_SCALE parameters of the AI are set to the default measurement temperature limits of -20 to

300°C (-4 to 572°F).

3) When the AI channel is set to the SECONDARY_VALUE_2, the XD_SCALE and OUT_SCALE

parameters are dependent on the PRIMARY_VALUE_TYPE in the TB (Concentration when

PRIMARY_VALUE_TYPE = Conductivity or Conductivity when PRIMARY_VALUE_TYPE =

Concentration).

M) HI_HI_LIM, HI_LIM, LO_LO_LIM, and LO_LIM parameters:

1) When the AI channel is set to the PRIMARY_VALUE, the limits are set to the default limits of the

Conductivity sensor.

2) When the AI channel is set to the SECONDARY_VALUE_1 (Temperature), the limits are set to the

default measurement temperature limits of -20 to 300°C (-4 to 572 °F).

3) When the AI channel is set to the SECONDARY_VALUE_2, the limits are set to the default limits

determined by the Conductivity sensor range.

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ABB TB82PH Instructions d'exploitation Page 37

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