Hach-Lange SENSION+ MM374 - Manual (Page 13)

1. Put the probe and a reference thermometer in a container of water at
approximately 25 °C and allow the temperature to stabilize.
2. Compare the temperature read by the meter with that of the
reference thermometer. The difference is the adjustment value for
the meter.
Example: reference thermometer: 24.5 °C; meter: 24.3 °C.
Adjustment value: 0.2 °C.
3. Enter the adjustment value for the 25 °C reading:
a. From the main menu use the or to select SYSTEM. Confirm.
b. Use the or to select Readjust temp. and confirm.
c. Select Channel 1 or Channel 2 and confirm. The temperature for
channel 1 is measured by the conductivity cell and channel 2 is
measured by the pH probe. If no Conductivity cell is connected,
the temperature value must be entered manually or the
temperature measured in channel 2 can be applied to the meter.
d. Use the or to select 25 °C and confirm.
e. Use the arrow keys to enter the adjustment value for 25 °C.
Confirm.
4. Put the probe and a reference thermometer in a container of water at
approximately 85 °C and allow the temperature to stabilize.
5. Compare the temperature from the meter with that of the reference
thermometer. The difference is the adjustment value for the meter.
a. Use the or to select 85 °C and confirm.
b. Use the arrow keys to enter the adjustment value for 85 °C.
Confirm.
c. Select Save changes and confirm.
Change the stirring settings
The magnetic stirrer can be turned on and the stirring speed can be
changed in the Stirring menu.
1. From the main menu use the or to select SYSTEM. Confirm.
2. Use the or to select Stirring and confirm.
3. To turn on/off the stirrer push .
4. When the stirrer is turned on, use the or to change the stirring
speed in %.
Note: Use the or to change the stirring speed during calibration and
during a measurement.
Turn the stirrer on or off
The stirrer 1 works with Channel 1 and 2 (Stirrer 1). A second stirrer can
be connected to channel 2 (Stirrer 2). For the stirrer 2 activation refer to
the following steps.
1. From the main menu use the or to select SYSTEM. Confirm
with .
2. Use the or to select Stirrer N.2 and confirm with .
3. Use the or to select YES to turn the stirrer 2 on.
Note: Select NO to turn the stirrer 2 off.
Change the temperature units
The temperature units can be changed to Celsius or Fahrenheit.
1. From the main menu use the or to select SYSTEM. Confirm.
2. Use the or to select Temperature units and confirm.
3. Use the or to select between Celsius or Fahrenheit and confirm.
Data logger
Display data
The Display data log contains Measurement data, Electrode report and
Calibration data. The stored data can be sent to a printer or to a PC.
When the data log becomes full (400 data points), the oldest data point
is deleted when a new data point is added.
English 13