GE Monitor UPC-900 Operating Instructions Manual page 90

6 Maintenance
6.3 Cleaning
6.3.4 Clean the pH electrode
Step
2
3
4
6.4 Optical unit
Check lamp intensity
Step
1
2
90
Action
Place the electrode tip in the heated KNO
Allow the electrode to cool while immersed in the KNO
testing.
If these steps fail to improve the electrode response, replace the electrode.
Action
Select menu Check and press OK.
Select menu Check Lamp Intensity.
If:
R <300 mV for 254 nm
R <150 mV for 280 nm
R <150 mV for 214 nm,
AU
replace the lamp according to Change lamp assembly,
on page 92, or contact GE for lamp replacement.
Lamp
(on)
Autozero UV
Eventmark
pH 12.50
Set Parameters
Check
Setup
Alarm/Timer 00:22:24
Set Cond Zero Level
Set Cond Analog. Out
Main menu 1
solution.
3
Main menu 2
Parameter
Current value
Cond%Tc pH
22.4
Monitor UPC-900 Operating Instructions 29-0567-16 AB
ESC
solution before re-
3
Setup Cond ref temp
Display
Check Lamp Intensity
0.00002 015.0 4.02
Set UV Analog. Out
ESC ESC
Ne
Se