IM 12B6B3-E-H
Appendix 10-5
10-4. Setup for other functions
●
Contact Outputs
Alarms, trips, and proportional control are all possible with the relay outputs, and configuration is by
Service codes 40-49. In addition, FAIL alarm and wash cycle controller are available.
●
Current outputs
Transmission signals for the measured parameters and control signals can be set up in service codes 30
to 39.
●
Wash cleaning
When used with the correct hardware, the EXA can control a wash cleaning system. Refer to service
codes 40, 71 and 72.
●
Diagnostic Checks
Impedance checks, response time and stability checks are all included in the PH402. In order to get the
best performance from each of these features, the converter should be fine tuned according to experi-
ence in the installation, and for the particular sensors selected. Service codes 3, 4, 5, 20 & 71 all con-
tribute to the diagnostics. Please note that the default settings provide an excellent starting point and
provide most valuable information about the performance of the electrode system.
●
Communications
The proprietary HART RS485 communication link allows remote configuration and data retrieval through
the PC402 communication package. This is an excellent tool for the maintenance engineer, quality engi-
neer or plant manager. Service codes 60-69 are used to set up the communications.
●
Logbook
In combination with the communications link, a “logbook” is available to keep an electronic record of
events such as error messages, calibrations and programmed data changes. By reference to this log,
users can easily evaluate diagnostic information to determine predictive maintenance schedules. For
example, by monitoring the deterioration in the slope of the pH sensor, it can be changed before a failure
(or process shutdown) occurs.
Summary of Contents for PH402G
Page 1: ...Instruction Manual Model PH402G pH Converter IM 12B6B3 E H 7th Edition YOKOGAWA...
Page 2: ......
Page 6: ...IM 12B6B3 E H...
Page 26: ...IM 12B6B3 E H...
Page 68: ...IM 12B6B3 E H...
Page 76: ...IM 12B6B3 E H...
Page 82: ...IM 12B6B3 E H...
Page 93: ...IM 12B6B3 E H...