Calibration Mode - Lovibond MiniDirect Photometer Bedienungsanleitung

Calibration Mode

GB
Note:
A new calibration is necessary in case of a new unit as well as by use of a new
BATCH of SPADNS reagent solution.
Press MODE key and keep it depressed.
Mode
Switch unit on using ON/OFF key.
On
Release MODE key after approx. 1 second.
Off
The "!" key allows for selection of the menu points:
Measure the sample and reagent volume with a 10 ml and 2 ml pipet only.
Calibration solutions and samples should have the same temperature (±1°C).
Press MODE key and keep it depressed.
Mode
Switch unit on using ON/OFF key.
On
Release MODE key after approx. 1 second.
Off
CAL
The display will show alternately:
F
Fill a clean vial with 10-ml deionised water and replace the cap tightly. Place the
vial back in the sample chamber making sure the ∆ and ∇ marks are aligned.
Place the cover on the sample chamber.
Zero
Press the ZERO/TEST key.
Test
The method symbol flashes for approx. 8 seconds.
F
The display shows the following.
0.0.0
Remove the vial from the sample chamber. Pipet 2 ml of SPADNS-reagent.The
SPADNS-reagent must be measured accurately. Replace the cap tightly. Invert the
vial gently several times to mix the contents. Place the vial back in the sample
chamber making sure the ∆ and ∇ marks are aligned. Place the cover on the
sample chamber.
Zero
Press the ZERO/TEST key.
Test
The method symbol flashes for approx. 3 seconds.
F
The display shows the following:
FO
Empty the vial, rinse vial and cap several times and dry
Measure 10 ml standard solution of 1 mg/l Fuoride accurately into the dry vial.
Pipet 2 ml of SPADNS-reagent.The SPADNS-reagent must be measured accurate-
ly. Replace the cap tightly. Invert the vial gently several times to mix the contents.
Place the vial back in the sample chamber making sure the ∆ and ∇ marks are
aligned. Place the cover on the sample chamber.
Zero
Press the ZERO/TEST key.
Test
The method symbol flashes for approx. 3 seconds.
F
The display shows the following:
F1
(confirmation of calibration (adjustment))
Switch the unit off using the ON/OFF key.
On
The new calibration is stored.
Off