User Manual

EC400 V2.0 6-08-05 9
Considerations and Techniques
• Do not touch the inner surfaces of the conductivity electrodes. Touching the surface
of the platinized electodes may damage and reduce the life of the probe.
• Store the electrode dry, in the storage cap.
• Always rinse the electrode in de-ionized water between measurements to avoid cross
contamination of the sample. Double rinsing is recommended when high accuracy is
required.
Operational Matrix
Function /
Resulting
Action
Power
Status
Mode
Setting
Required Key Press Sequence
On/Off On or
Off
Any Momentary press of the On/Off key
Calibration On Conductivity Press & hold CAL/RECALL key for 2
seconds, until it enters CAL function
Store
Reading
On Any measure
mode
Momentary press of the MODE/HOLD key
Hold
Release
On While In Hold
Mode
Momentary press of the MODE/HOLD key
Enter
Memory
Retrieval
On Any measure
mode
Momentary press of the CAL/RECALL key
followed by a momentary press of the
MODE/HOLD key (Within 4 seconds)
Scroll Stored
Readings
On Memory
Recall
Momentary press of the MODE/HOLD key
(Displays “last in first out”)
Exit Memory
Retrieval
On Memory
Recall
Momentary press of the CAL/RECALL key
Clear Stored
Memory
On Any Measure
Mode
Press and hold the On/Off key for 4
seconds, until “Clr” is displayed.
Change
Measureme
nt Mode
On Any Press and hold the MODE/HOLD key for at
least three seconds (the modes will scroll by
until the key is released)
Enter
Cond/TDS
Ratio
On TDS (ppm or
mg/l)
Press and release the CAL/RECALL key
twice in quick succession
Change
Cond/TDS
Ratio
On TDS ratio Momentary press of the MODE/HOLD key
(each key press increases the ratio by 0.1,
the value cycles from 0.4 - 1.0)
Exit
Cond/TDS
Ratio
On TDS ratio Momentary press of the CAL/RECALL key
Change
Temperature
Units
Off n/a (off
mode)
Press and hold the CAL/RECALL key then
momentarily press the On/Off key. Release
the CAL/RECALL key after the "Self Cal"
lights
Override
Auto Power
Off
On Any measure
mode
Momentarily press the Cal Key then
simultaneously press and hold the ON/OFF
& MODE/HOLD key for approximately 2
seconds, until “oFF” is displayed
Default
Reset
OFF n/a Simultaneously press ON/OFF,
CAL/RECALL and MODE/HOLD
momentarily. “dFLt” will be displayed.