Emerson ROSEMOUNT 5081-A Instruction Manual page 61

MODEL 5081-A
7.7.4 Procedure using Deltav
Access: deltaV Explorer/transducer Block/Properties, pH Compensation tab
1. pH Compensation (Auto/Manual) and Preamp Location
Parameter: pH Compensation/Preamp Location (PH_CoMPENSAtIoN_ModE)
Select the pH compensation mode and preamp location from the following table:
Description
Automatic pH Compensation with Preamp in transmitter
Manual pH Compensation with Preamp in transmitter
Automatic pH Compensation with Sensor Preamp
Manual pH Compensation with Sensor Preamp
2. If manual pH compensation was chosen,
Parameter: Manual pH Value (MANuAL_PH_VALuE)
Enter the desired manual pH value.
3. to enable/disable impedance diagnostic:
Parameter: Impedance diagnostics (ENABLE_dIAGNoStIC_FAuLt_SEtPoINt)
Enter the desired value.
4. Enter the high glass impedance fault limit. the default is 1000 MW.
Parameter: Glass Fault High Setpoint (GLASS_FAuLt_HIGH_SEtPoINt)
5. Enter the low glass impedance fault limit. the default is 10 MW.
Parameter: Glass Fault Low Setpoint (GLASS_FAuLt_LoW_SEtPoINt)
6. Enable or disable glass impedance temperature correction. Because glass impedance is a strong function of temper-
ature, correcting glass impedance for temperature effects is strongly recommended.
Parameter: Impedance temperature Compensation (IMPEdANCE_tEMPERAtuRE_CoMPENSAtIoN_PH)
7. Enter the reference offset limit. default is 60 mV.
Parameter: Zero offset Error Limit (ZERo_oFFSEt_ERRoR_LIMIt)
8. Select manual buffer calibration or automatic buffer calibration using the buffers listed in the table below. More infor-
mation on the buffers listed can be found in Section 13.1. using automatic buffer calibration is strongly recommended.
Description
Manual buffer calibration
Standard buffers
dIN 19267 buffer
Ingold buffers
Merck buffers
Parameter: Buffer Calibration (BuFFER_StANdARd)
9. Set the stabilize time for automatic buffer calibration. the range is 0 to 99 sec. the default is 10 sec.
Parameter: pH Stabilize time (PH_StABILIZE_tIME)
Enter the desired value.
10. Set the stabilization value for automatic buffer calibration. the range is 0.02 to 0.50 pH. the default is 0.02 pH.
Parameter: pH Stabilize Value (PH_StABILIZE_VALuE)
Enter the desired value.
value Digital Equivalent
Manual
Std
dIN
Ingold
Merck
value Digital Equivalent
Auto, Int.
Man, Int.
Auto, Sensor
Man, Sensor
0
1
2
3
4
SECTION 7.0
PROGRAMMING
0
1
2
3
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