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Instruction Manual Mi170 Bench Meter
EC/TDS CALIBRATION
EC calibration is a one-point procedure. Selectable calibration points are 0.00 µS for
offset and 84.0 µS, 1413 µS, 5.00 mS, 12.88 mS, 80.0 mS, 111.8 mS for slope.
Rinse the probe with calibration solution or deionized water. Immerse the probe into
the solution. The sleeve holes must be completely submerged. Tap the probe repeatedly
to remove any air bubbles that may be trapped inside the sleeve.
To enter EC calibration, select the EC range and press CAL.
Note
: The TDS reading is automatically derived from the EC reading and no specific
calibration for TDS is needed. Pressing CAL when TDS range is selected has
no effect.
For
zero calibration
, just leave the dry probe in the air. This calibration is performed in
order to correct the reading around 0.00 µS. The slope is evaluated when the calibration
is performed in any other point.
The primary LCD will display the EC reading and the secondary LCD will display the
closest calibration solution, along with “CALIBRATION” tag. The “WAIT” tag will blink
until the reading is stable.
When the reading is stable and close to the selected calibration solution, “READY”
and “ACCEPT” tags will blink on the LCD.
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SETUP
Setup mode allows viewing and modifying the following parameters:
• Cell Constant
• TDS Factor
• Temperature Coefficient
• Reference Temperature
• Current Time (hh:mm)
• Current Date (MM.DD.YYYY)
• Beep Status
• Baud Rate (serial communication)
• Instrument ID
• Temperature Unit
To enter SETUP mode, press and hold the SETUP key for about 2 seconds while in
normal measurement mode.
Select the desired setup parameter using the UP and DOWN arrow keys.
Press the CAL key if you want to change the item value. The selected item (e.g. hour,
in setting up the correct time) and “ACCEPT” tag will start blinking.
Press the arrow
keys to change the displayed value.
If there is another item to be set (e.g. minutes), press the RANGE/FIXED key. The other
item will start blinking.
