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C
M
ALIBRATION
ODE
The controller is factory calibrated for temperature as well as for the analog
outputs. The user should periodically calibrate the instrument for the conductivity
range.
For greatest accuracy, it is recommended to standardize the probe with a cali-
bration solution close to the expected sample value.
• While in idle or control mode, press the CAL key to enter the calibration mode
and the meter will ask for password. Either the general or the calibration pass-
word can be used to enter the mode.
• Once confirmed the correct password, the display will show the first available
calibration, and the user can scroll through all available procedures by using
the up & down arrow keys.
• Conductivity cell constant
• Conductivity air offset
• Conductivity installation factor
• Temperature, Pt100 or Pt1000 sensor
• Analog output 1 and Analog output 2
• Press CFM to enter the desired calibration procedure, or CAL to exit.
Conductivity Cell Constant Calibration
• Once entered the conductivity cell constant calibration, it is possible to choose
the calibration point from among 5 memorized Hanna standard solutions
(1413 μS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm, 111.8 mS/cm),
enter a custom value ("User solution" for 1 point procedure), or the conductiv-
ity cell constant ("Manual setting" option).
• If one of the Hanna memorized standards is con-
firmed, the instrument will ask if "zero" calibration
(i.e. air offset) is also desired.
• If no, confirm the "No" option and proceed with
the selected calibration solution. If yes, leave the
probe in air, while making sure it is dry, and con-
firm the "Yes" option. The instrument will start the
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zero calibration, and the "Wait ..." message will flash on the LCD. After com-
pleting the procedure, the meter will ask for confirmation to proceed with the
previously selected calibration point.
• Press CFM to confirm and immerse the conductivity probe & temperature
sensor (if a separate temperature probe is used) in the proper calibration solu-
tion. Otherwise, press CAL to exit without saving.
• Wait until the instrument ask for confirmation. Press CFM to confirm or CAL to
exit without saving the calibration.
• If the probe is immersed in a wrong solution the "Invalid input!" message will
warn the user.
Conductivity Air Offset Calibration
This mode allows the user to calibrate the zero point only.
• Leave the probe in air, while making sure it is dry,
and confirm the selection. The meter will auto-
matically perform the calibration and ask for con-
firmation.
• Press CFM to save the air offset calibration, or
CAL to exit without any updating.
Conductivity Installation Factor Calibration
This procedure follows the same steps as the con-
ductivity cell constant calibration (see related para-
graph for details), and allows to adjust the probe/
instrument system to each particular installation.
Temperature Calibration (Pt100 or Pt1000 sensor)
The controller is factory calibrated for temperature. However, the user can per-
form a 2-point calibration procedure.
• The instrument can support Pt100 or Pt1000 temperature sensor. Choose the
corresponding calibration option with the up & down arrow keys.
• The first calibration point is 0°C, while the second one can be selected be-
tween 25 and 50°C.
• Prepare an ice bath at 0°C by mixing crushed ice and water, and a beaker
containing hot water at 25 or 50°C.
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