Emerson Process Management IB106-340 SPS 4000 Troubleshooting, Nance and Service

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 2.4 April, 2001

Install all protective equipment covers and safety ground leads after trouble- shooting. Failure to replace covers and ground leads could result in seri- ous injury or death.

7-5 SPS 4000 TROUBLESHOOTING

Use the CAL FAIL and IN CAL relay outputs to identify possible SPS 4000 faults.

a.If a calibration was not successfully com- pleted, the SPS 4000 sends a CAL FAIL contact indication to the control room. To determine if the SPS 4000 caused the failed calibration, go to the Oxymitter 4000 site to view the keypad. Or, access the HART/AMS menus. For more information on HART/ AMS, refer to Section 5, HART/AMS.

1.If no alarms are indicated on the key- pad or in the HART/AMS STATUS sub- menu, the calibration did not fail be- cause of an Oxymitter 4000 fault. Therefore, a calibration gas flow prob- lem occurred. Refer to Table 7-2 or Figure 7-15 to troubleshoot the SPS 4000.

2.If the LAST CAL FAILED alarm is indi- cated on the keypad or in the HART/ AMS STATUS sub-menu, the failure is due to either a bad Oxymitter 4000 cell or a calibration gas flow problem.

(a)Verify your calibration setup per paragraph 6-2in Section 6, MAIN- TENANCE AND SERVICE, Also, verify your calibration gas setup.

(b)Perform another calibration and monitor the process. If the calibra- tion fails before both calibration gases finish sequencing, a gas flow problem exists. Refer to Table 7-2or Figure 7-15to troubleshoot the SPS 4000.

If the calibration setup is correct and the Oxymitter 4000 indicates an invalid slope fault (fault 12) be- fore the gases are purged and a last calibration failed fault (fault 14) after the gases are purged, replace the Oxymitter 4000 cell per para- graph 6-8 in Section 6, MAINTE-

NANCE AND SERVICE.

b.If a semi-automatic or manual calibration is being performed but no 5 - 30 VDC relay output contact (IN CAL or CAL FAIL) is be- ing received by the control room, the inter- face board relays are malfunctioning. Replace the interface board per paragraph 6-10b.

NOTE

If the unit is performing frequent auto- calibrations, investigate at the Oxymit-

ter 4000 site or using HART/AMS. This7 condition may indicate an aging cell in

the Oxymitter 4000.

Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 7-19