Sper Scientific 860031 pH - mV Bench-Top Meter - Manual (Page 43)

43
MEASUREMENT PROCEDURES
6. Press MODE to switch between CON and TDS/SALT.
Total Dissolved Solid Measurement
TDS readings display ppm or ppt on the LCD. The ATC
indicator appears in the lower right corner of the LCD to
indicate Automatic Temperature Compensation. If you
select MTC, the ATC indicator will disappear. When
selecting MTC, you must first deactivate ATC in P5.1 (page
23) and then set a MTC value in P5.3 (page 24).
Before measuring, remove the probe cover if needed. The
conductivity probe measures 0.00 ~ 9.99 ppm, 0.0 ~ 99.9
ppm, 0 ~ 999 ppm. To measure:
1. Rinse the probe with de-ionized or distilled water.
2. Press POWER to turn the meter on. Press MODE to
select TDS measurement. Before measuring, set the
temperature coefficient (P5.2 on page 23) and TDS
conversion factor (P5.4 on page 24).
Note…
Tref (page 63) of the meter is set at 25°C and CANNOT be
adjusted.
3. Immerse the probe tip (glass bulb) completely into the
sample.
4. Stir the probe gently to create a uniform sample.
5. Wait until the reading has stabilized. If enabled in setup,
“READY” will illuminate to indicate a stable reading.