Operation; Measurement; Stability Measuring; Continuous Measuring - Hach sensION+ MM150 Manual

6. Operation

6.1. Measurement

Note: The instrument must be calibrated before taking the
first reading.
1. Press
2. Remove the sensor protector.
3. Clean the sensor with deionized water.
4. Stir the sensor uniformly in the sample, holding it by the
top.

6.1.1. Stability measuring

Follow the diagram.
The reading is not locked on the screen until the sensor sig-
nal varies less than:
- pH: 0.01 pH for 6 sec.
- EC: ± 1 digit for 6 sec.
- Redox: 0.5 mV for 6 sec.
Once the reading has stabilized, the screen lights up for
2 sec.

6.1.2. Continuous measuring

Once stability measuring has begun, press the
twice
.
The instrument displays the measured value directly on
screen at all times.
The continuous reading should always be started after be-
ginning a stability reading (see diagram).
To end a continuous reading, press
The display will light up for 2 sec.
Note: If the measuring instrument is not used for 5 minutes,
it will shut itself off automatically.

6.2. Units of measurement

The sensION
sor connected and displays the relevant values and units on
screen:
- Sensor 50 59: pH, conductivity, TDS and temperature.
- Sensor 50 48: pH, conductivity, redox (mV) and temperature.
sensION+ MM150 HACH 0710.indd ANG:11 sensION+ MM150 HACH 0710.indd ANG:11
to turn on the instrument.
.
+
automatically recognizes the sen-
™
MM 150
Stability
measuring
key
2 s
With sensor 50 48
Continuous
measuring
+
With sensor 50 59
11
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