Instrument Start-Up; Operation - Dissolved Oxygen Measurement Mode; Operation Page - ABB 9438 User Manual

...6 START UP AND OPERATION
6.1 Instrument Start-up – Fig. 6.1
Ensure all electrical connections have been made and switch on the power supply. If the instrument is being commissioned for the
first time, calibration and programming of parameters is required.
The overall operating and programming chart is shown in Fig. 6.1.
6.2 Operation – Dissolved Oxygen Measurement Mode
Operation in the Dissolved Oxygen measurement mode comprises an
a general use page in which parameters are viewed only and cannot be altered. To alter or program a parameter, refer to the
programming pages in Section 7. The
prevent unauthorized access to the sensor calibration page. The value is preset at 00000 to allow access during commissioning, but
should be altered to a unique value, known only to authorized operators, in the

6.2.1 Operation Page

.
1 8 1
g/kg
D.O.
2 0 0 .
Temperature ( C)
°
– – – – –
Sensor O/P (A)
– – – – –
Sensor Eff
.
1 5 0
High Set g/kg
5 0 .
Low Set g/kg
– – – – –
Open Valve NO
YES
– – – – –
SENSOR CAL.
16
allows a calibration to be carried out. A 5-digit calibration code is used to
Calibration Page
Measured Dissolved Oxygen
The measured dissolved oxygen is displayed in µg/l, mg/l, ppb, ppm, mg/kg or µg/kg.
Auto ranging: 0.0 to 99.9 µg kg
100 to 999 µg kg
1.00 to 9.99 mg kg
10.0 to 20.0 mg kg
Press to advance to next parameter or press
Section 6.2.2.
Sample Temperature
The sample temperature is displayed in either °C or °F – see Section 7.1.
Sensor Output
Raw current signal (µA) generated by the sensor.
Sensor Efficiency
Bar graph indication of the sensor performance, based on last calibration – see Section
6.2.2.
High Setpoint
The alarm setpoint value is only visible if the alarm is programmed for either D.O. or
High
Temperature and is set to
Low Setpoint
The alarm setpoint value is only visible if the alarm is programmed for either D.O. or
Low
Temperature and is set to
Open Valve
Manually open the calibration valve to drain the flowcell prior to accessing the sensor. The
reading displayed when the valve is open does not represent the dissolved oxygen
content of air-saturated water at the prevailing ambient temperature.
Advance to
Calibration Page
and a
Operating Page Calibration Page
Set Up Alarm page
–1
–1
–1
–1
or .
High High/Low
or .
Low High/Low
, Section 6.2.2.
. The
Operating Page
– see Section 7.2
to advance to
Calibration Page
is
,