Hanna Instruments PCA 310 - Manual (Page 40)

40
CALIBRATE THE MEASURING CELL
The PCA 310-330 analyzers have the possibility to calibrate
the measuring cell.
When a new calibration is performed, calibration factor is
recalculated and all measurements are multiplied with it.
CALIBRATION DATE AND FACTOR
The last calibration date
can be found in the
“Chlorine menu” -
“Cal. Measuring Cell”
- “Cal. Date”. Cali-
bration date is in the
YY / MM / DD format.
A warning “Cl Calibration Old” is displayed if one month
elapsed from the last calibration.
The calibrated date is updated after a new calibration is done.
The calibration factor is displayed in “Chlorine menu” - “Cal.
Measuring Cell” - “Factor”.
The default calibration factor is 1.000. Each measurement
result is multiplied with calibration factor.
The calibration factor could be reset to 1.000 by activating
the “Chlorine menu” - “Cal. Measuring Cell” - “Reset Cal.
Factor” function.
CALIBRATION PROCEDURE
To calibrate the measuring cell, follow the steps:
• Withdraw a sample of the measured liquid directly from the
drain port of the measuring cell (#11) by opening its valve
(#10) - see figure on page 10.
Note: Withdraw the sample just before the electrovalve stops the liq-
uid flow to the measuring cell.
Cal.Value:0.14 mg/L
Factor
:0.954
Cal. Date:04/01/20
Reset Cal. Factor
Calibration Blank
The alarms could be separately activated or inactivated.
To modify the alarms status, enter the “Chlorine Menu” - “Alarms
Chlorine” menu and edit “Alarm Hi” or “Alarm Lo” status.
When the status is set to “Inactive”, the alarm is ignored.
Note: The Alarm high must be greater than Alarm low value. The
analyzer display a warning if the settings are incorrect.
The Alarm high setpoint and Alarm low setpoint could be quickly
consulted on one chlorine measuring panel. When an alarm is
disabled, the —.— is displayed instead of alarm value.