GE Monitor UPC-900 Operating Instructions Manual page 91

Check lamp run time
Step
1
2
3
Autozero
The module internal absorbance value for autozero can be checked to test the consis-
tency of buffers.
Step
1
2
Monitor UPC-900 Operating Instructions 29-0567-16 AB
Action
Select menu Check and press OK.
Select menu Check Lamp Run Time.
The lifetime of a Hg lamp at 254 nm, in room tem-
•
perature is typically 7000 hours (in cold room, typi-
cally 2000h).
The lifetime of a Hg lamp at 280 nm, in room tem-
•
AU Cond%Tc pH
perature is typically 3500 hours.
The lifetime of a Zn lamp is typically 2000 hours in
•
Lamp
room temperature.
(on)
When necessary replace the lamp according to Change
Autozero UV
lamp assembly, on page 92, or contact GE for lamp re-
placement.
Eventmark
pH 12.50
Set Parameters
Action
Check
Select menu Check and press OK.
Select menu Check Autozero. The autozero absorbance
Setup
value for the wavelength used is shown.
Alarm/Timer 00:22:24
Set Cond Zero Level
Set Cond Analog. Out
Set Cond Full Scale
Set ph Analog. Out
Set ph Full Scale
Set ph Zero Level
Parameter
Current value
22.4
6 Maintenance
6.4 Optical unit
Setup Cond ref temp
Display
Check Lamp Run Time
Hg 2300 h Zn 340 h
Display
Check Autozero
AZ 0.00006 AU
Check Lamp Run Time
Hg 2300h Zn 340h
Set UV Analog. Out
Set UV Range
Set UV Zero Level
Check Lamp Intensity
Calibrate pH
(7.00–12.00)
Calibr pH Buffer 1
91
Calibr pH Buffer 2
Check Recorder