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of the probe.
Technical Specifications of the 201T-F pH Electrode
Measurement Range: 0 - 14 pH, 0 - 80˚C (32 – 176˚F)
Junction: Single Ceramic
Reference Electrode: Ag/AgCl
Connector: BNC
Size: ø12*160 mm
Temperature unit: 30K Thermistor
Electrode Connectors
The pH electrode has two connectors: the BNC connector connects the pH probe; the RCA connector connects
the temperature sensor. Plug these two connectors into ‘pH/mV” and “TEMP” sockets. Please note not to pull
the cables in case of poor contact. Please keep the connectors clean and dry. Refer to section 4.7 regarding
how to properly maintain the pH electrode.
Use the Electrode
Screw off the KCL storage bottle, and put it aside (do not dump or spill the KCL solution). Prepare a cup of
distilled water, and rinse the electrode in it for a few seconds. Gently shake the probe to remove excess water,
and dry it with clean tissue paper (DO NOT rub or wipe the probe, just use paper to dap off excess water).
Gently stir the electrode for a few seconds after it’s dipped into the test solution and then let it stand still. Wait
for the stable measurement (a smiley face appears and stays) and then record the readings. When test is
finished, place the electrode in the storage bottle and tighten the cap in order to keep the sensitivity of the pH
sensor.
5.3
Information regarding Calibration
pH buffer solutions
The meter has 2 series of standard buffer solutions: USA and NIST (see Table-2). They can be selected
in parameter P1 (see 4.6.1).
Table-2
Calibration icon
pH standard buffer series
USA
NIST
3-Point
calibration
1.68 and 4.00 pH
1.68 and 4.01 pH
7.00 pH
6.86 pH
10.01 pH
9.18 pH
3-Point Calibration
The meter can adopt 1 to 3 points of calibration. The 1
st
point must be using 7.00 pH (or 6.86 pH) buffer
solution, and then choose other buffers to do 2
nd
point and 3
rd
point. Please refer to Table-3 for details. In
the process of calibration, the slope of acidity range and alkalinity range will be displayed, which indicates
the health of your probe. The closer the slope is to 100%, the better the condition of the probe is.
