Yokogawa DO402 Dissolved Oxygen Analyzer - Manual (Page 41)

IM 12J05D02-01E
Parameter setting 5-5
5-2. Commissioning mode
In order to obtain peak performance from the EXA converter, you must set it up for each custom applica-
tion. Refer to section 1-4 for standard configurations and options.
*SETP Alarms are set by default S1 - high process alarm
S2 - low process alarm
S3 - WASH
S4 - FAIL
The setpoints are at arbitrary default value. Therefore, you must set these to
meaningful values, or set them to off. (See service codes 40 to 49 and user
interface codes 50 to 59).
*RANGE mA output 1 is set as default to 0 - 20 mg/l
mA output 2 is set as default to 0 - 50 °C
For enhanced resolution in more stable measuring processes, it may be desir-
able to select 0 - 5 mg/l range, for example, and maybe 0 - 25 °C temperature
range.
Service codes 30 to 39 can be used to choose other output parameters on mA
output 2.
*HOLD The EXA converter has the ability to “hold” the output during maintenance peri-
ods. This parameter should be set up to hold the last measured value, or a fixed
value to suit the process.
*WASH The EXA can be set up to control a wash cleaner. When using this function, the
timings must be configured for interval, wash and recovery periods.
*SERV This selection provides access to the service menu.
What follows are pictorial descriptions of typical frontplate pushbutton sequences for each parameter set-
ting function. By following the simple YES/NO prompts and arrow keys, users can navigate through the
process of setting range, setpoints, hold, wash and service functions.