8
Instruction Manual Mi170 Bench Meter
TDS MEASUREMENTS
• Press the RANGE/FIXED key until the display changes to TDS mode.
• The TDS reading will be displayed on the primary LCD and the temperature reading
on the secondary LCD, along with the reference temperature.
Note
: The compensation is referenced at the selected reference temperature (see
SETUP for details, page 23).
Automatic (ATC)
: The EC probe has a built-in temperature sensor; the temperature
value is used to automatically compensate the EC/TDS reading (from -20.0 – 120.0 °C).
Manual (MTC)
: The temperature value, shown on the secondary LCD, can be manu-
ally set with the UP and DOWN arrow keys. The “°C” tag blinks when this option is active.
No Compensation (NOTC)
: The temperature value is displayed, but is not taken
into account and “°C” tag blinks. The reading displayed on the primary LCD is the
uncompensated EC or TDS value. To select the desired option, press the SHIFT&
/ATC
keys until the option is displayed on the LCD.
Notes:
• The default compensation mode is
ATC
.
• If no temperature probe is detected,
ATC
mode can not be selected and the instru-
ment displays “----” on the secondary LCD.
If temperature compensation is active, measurements are compensated using the tem-
perature coefficient (default value 1.90 %/°C). To change the temperature coefficient,
enter the setup mode and select the “tc” item (see SETUP for details, page 23). The
current temperature coefficient can be quickly viewed by pressing the SHIFT&
/TC
keys. The value is briefly displayed on the secondary LCD.
• If the temperature reading is out of the -20.0 to 120.0 °C (-4.0 to 248.0 °F) interval
and
ATC
option is selected, the “°C” tag will blink and the closest interval limit will
be displayed.
• Press the UP and DOWN arrow keys to change the displayed temperature value.
This value is used to compensate the EC/TDS reading.
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www.milwaukeeinst.com
TEMPERATURE CALIBRATION (for technical personnel only)
The
Mi170
is factory calibrated for temperature.
Milwaukee’s temperature probes are interchangeable and no temperature calibration
is needed when they are replaced.
If the temperature measurements are inaccurate, temperature recalibration should be
performed.
For an accurate recalibration, contact your dealer or the nearest Milwaukee Customer
Service Center, or follow the instructions bellow.
• Prepare a vessel containing ice and water and another one containing hot water
(at a temperature of around 50 °C). Place insulation material around the vessels
to minimize temperature changes.
• Use a calibrated thermometer with a resolution of 0.1 °C as a reference thermom-
eter.
• With the instrument off, press and hold down the CAL & LOG/MR keys, then power
on the instrument. The “CALIBRATION” tag will appear and the secondary LCD will
show 0.0 °C.
• Immerse the temperature probe in the vessel with ice and water as near as possible
to the reference thermometer. Allow a few seconds for the probe to stabilize.
• Use the UP and DOWN arrow keys to set the reading on the secondary LCD to
that of ice and water, measured by the reference thermometer. When the reading
is stable and close to the selected calibration point, the “READY” and “ACCEPT”
tags will blink.
• Press the GLP/ACCEPT key to accept the calibration point. The secondary LCD will
show 50.0
°
C.
• Immerse the temperature probe in the second vessel as near as possible to the refer-
ence thermometer. Allow a few seconds for the probe to stabilize.
• Use the UP and DOWN arrow keys to set the reading on the secondary LCD to
that of the hot water, measured by the reference thermometer.
• When the reading is stable and close to the selected calibration point, the “READY”
and “ACCEPT” tags will blink.
• Press the GLP/ACCEPT key to accept the calibration point. The instrument returns to
measurement mode.
Note
: If the reading is not close to the selected calibration point, “WRONG” tag will
blink. Change the temperature probe and restart calibration.
