Hanna Instruments HI 3512 - Manual (Page 15)

15
The EC, Resistivity and TDS scales are auto-ranging. The meter automatically
sets the scale with the highest possible resolution.
By pressing
Lock, the auto-ranging feature is disabled and the current
range is frozen on the LCD.
The “Range: Locked” message is displayed. To restore the auto-ranging
option press AutoRng functional key again.
The auto-ranging mode is also disabled by selecting a “fixed range” in
the SETUP menu. While in fixed range mode the instrument will display
the readings with the fixed resolution. Maximum 6 digits can be
displayed.
The top of the fixed range is displayed blinking when the reading exceeds
this value.
To disable fixed range mode enter SETUP and select auto-ranging mode.
Note: Auto-ranging is automatically restored if the range is changed, if
the meter is turned off and back on again or if the calibration
mode is entered.
AUTO-RANGING EC CHANNEL AUTO-RANGING EC CHANNEL AUTO-RANGING EC CHANNEL AUTO-RANGING EC CHANNEL AUTO-RANGING EC CHANNEL