Instrument Test Procedure
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Ensure that the shorting plug is connected to the BNC pH in
put at the back of the meter. Switch on using the switch on the
back panel.
Press the Mode key to select pH mode and clear any calibra
tion data by pressing the Clear key for 5 seconds.
The displayed reading should read 7.00 ±0.02pH
Switch to m V mode by pressing the mode key. Display should
read 0.0 ±0.2mV
Switch to °C key by pressing the mode key. Ensure that the
display has a value in the range 0.0 to 19.0
°
C and is adjustable.
i.e. responds to the use of the -G iJ- keys. Adjust to 20.0
°
C
The meter is ready for calibration
pH/ION INPVT
FIEf
'-
'v
W
kARL FISCHER
Iv v·I
D.C. INfflT 9V O.SW
·-
..... -�''"".,..,,,.. ....... ,...,""'
TEMP
RS 232
Figure 2. Rear view of RE357T:x
A Note on Electrodes
pH, Ion Selective and Redox electrodes may all be used with the
RE357. These may be combination or half-cell types. Combination
or sensing half-cells should have a BNC terminal and be connected
to the socket marked pH/ION input at the back of the meter. Refer
ence half-cells should have a 4mm bunched terminal and be con
nected to the socket marked REF. Always refer to electrode in
structions before use. See also, Appendix I.
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