Hach POLYMETRON 8810 ORP Manuel D'utilisation De Base page 22

Calibration in PROGRAMMING mode
Two options are available:
• PRIMARY CALIBRATION
• SYSTEM CALIBRATION
PRIMARY or SYSTEM calibration
A primary calibration is made in the factory and is the reference for all other calibrations. In general,
this should not need to be renewed unless significant system modifications have been made e.g.
electrode replacement.
If the CAL 2 PT option has not been chosen, or if the INC. POT. 1PT or DEC. POT 1PT application
has been chosen, then no additional parameters are required. For other applications the calibration
point must be selected. Select either CAL ON 1st PT, CAL on 2nd PT or CAL ON xdPt.
The process for a PRIMARY or SYSTEM calibration is the same.
1. From the CALIBRATION menu, select PRIMARY CAL or SYSTEM CAL with the scrolling keys
and press Enter.
Option
MANUAL SYS CAL
PROCESS SYS CAL This calibration uses the process solution, with known concentration, as the
AUTO SYS CAL
Manual calibration
1. Select MANUAL SYS CAL and press Enter.
2. FILL CAL SOL. is displayed. Pour the calibration solution into the measurement chamber and
press Enter.
3. CONC SOL: XXXXX is displayed. Enter the concentration as a five digit number with no decimal
point, or a four digit number with decimal point. Press Enter to confirm.
4. If the CAL 2 PTS option has been selected, the second point concentration is required. Enter the
concentration of the second solution and press Enter.
Process calibration
1. Select PROCESS SYS CAL and press Enter.
2. CONC SOL: XXXXX is displayed. Enter the concentration as a five digit number with no decimal
point, or a four digit number with decimal point. Press Enter to confirm.
3. If the CAL 2 PTS option has been selected, the second point concentration is required. Enter the
concentration of the second solution and press Enter.
Automatic calibration
This is only available if the analyzer has this option installed. It allows for an automatic calibration at
pre-programmed intervals, using a calibration solution of known concentration.
Note: If this is the first time this option is being selected, select NO to IMMEDIATE at step 3 in order to input
required additional parameters.
1. Check the content of the calibration solution cannister. One calibration uses 250 to 300 mL of the
calibration solution so the capacity of a standard canister will allow 30 to 40 calibrations.
2. Select AUTO SYS CAL and press Enter. IMMEDIATE is displayed. Select YES or NO followed
by Enter. If YES is selected an automatic calibration will start immediately. No more input is
required.
22 English
Description
This calibration requires a laboratory prepared calibration solution(s) with known
concentration.
calibration solution.
This is only available if this option has been installed.