Instruction Manual

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4.3.2 Recall measuring information:
(a) In measurement mode, long press < M+/RM > key, the meter will recall the previous
stored information. The storage serial number, RM icon and the complete measuring
information will appear on the lower right corner of the LCD screen; measuring time and
date will be displayed on the upper right corner. Then press < ▼ > or < ▲ > key and the
measured information will be recalled accordingly. Long press < ▼ > or < ▲ > key to rapidly
check the measuring information under other serial number.
(b) In the recalling mode, press < ENTER > key to return to the measuring mode.
4.3.3 Clear stored value
In the recalling mode, long press < M+RM > key for 5s,
icon will appear on the LCD
for 2s. It means the internal storage has been cleared.
4.4 Sockets:
REF — Reference electrode socket
pH/mV — pH and ORP electrode socket (BNC socket)
TEMP — Temperature electrode socket (RCA socket)
RS232 — RS232 communication connector socket
DC9V — DC9V power socket, Ф2.5, inner “+” outer “-”
5 pH Measurement
5.1 Preparation:
5.1.1 Install the electrode holder
The electrode holder is composed of a metal stand base, and a flexible electrode arm and
holder. Simply insert the arm and holder into the metal stand base. Adjust the flexible arm
and holder according to your needs.