Safety
pH 330i/340i
4
Safety
Safety
instructions
The individual chapter of this operating manual use the following safety in-
struction to indicate various types of danger:
Warning
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Display and jack field
Display
Jack field
Warning
Only connect electrodes to the measuring instrument that do not return any
unallowed voltages or currents (> SELV and > current circuit with current lim-
iting).
Almost all electrodes - in particular WTW electrodes - fulfill these conditions.
Status display indicator
Measured value display
Function and
Temperature display
Sensor symbol
%
°F
S
TempError
mg/L
% ppm
mol/L
ISE
RCL
8
8 .
8
8
88
8
mV/pH
°C
LoBat
AutoCal DIN
CalError
ARng
AR
AutoCal TEC
TP
1
UpH
Time
Baud
Day.Month No.
Ident
Year
Auto Store
ConCal
1 pH electrode
4 Temperature sensor
2 Reference electrode
5 RS232 interface or analog output/
recorder (only pH 340i)
3 Plug-in power supply (only
pH 340i)
Ref
5
1
2
3
4
