12
AUTO-RANGING
The EC and TDS scales are auto‑ranging. The meter automatically sets
the scale with the highest possible resolution.
By pressing
ALT&LOCK
, the auto‑ranging feature is disabled and the
current range is frozen on the LCD. The “
LOCK
“ tag will be displayed
on the LCD.
Note: Auto-ranging is automatically restored if the range is changed,
if the setup or calibration modes are entered and if the meter is
turned off and back on again.
When auto‑ranging is disabled and the reading goes out of range, the
full‑scale value of the frozen range will be displayed blinking.
NaCl MEASUREMENTS
Press the
ALT&MODE
keys while in EC range until NaCl is displayed on
the LCD. The instrument will display the NaCl reading on the primary LCD
and the temperature reading on the secondary LCD line.
• If the reading is out of range, the full‑scale value (400.0%) will be
displayed blinking.
TEMPERATURE MEASUREMENTS
In pH and ORP mode, connect the
HI7662
temperature probe to the
appropriate socket.
Submerse the temperature probe into the sample and allow the reading
on the secondary LCD to stabilize.
In EC/TDS/NaCl range, the
HI76310
probe has a built‑in temperature
sensor.