Operation; Measurement; Stability Measuring; Continuous Measuring - Hach sensION+ PH1 Manual

5. Operation

5.1. Measurement

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

5.1.1. Stability measuring

Follow the diagram.
The reading is not locked on the screen until the elec-
trode signal varies less than 0.01 pH (0.5 mV) for 6
sec.
Once the reading has stabilized, the screen will light
up for 2 sec.

5.1.2. 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
beginning 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 min-
utes, it will shut off automatically.
5.2. Changing measuring units
(pH/mV)
To change the units of measurement from pH to mV
or vice versa.
sensION+ PH1_HACH_0710.indd ANG:9 sensION+ PH1_HACH_0710.indd ANG:9
to turn on the instrument.
.
in Stability measuring, hold down the
Stability
measuring
key
2 s
key for 2 s
Continuous
measuring
+
2 s
9
7/9/10 13:08:59 7/9/10 13:08:59