Calibration procedure – LaMotte 1200 Colorimeter User Manual

Page 18

CALIBRATION PROCEDURE

The 1200 has been pre-calibrated. Recalibration of the 1200 by the user is not
required. However, a procedure to standardize the calibration (shown below)
should be performed to obtain the most accurate readings.

Prepare standard

solutions to be

tested.

Insert the tube

into the

chamber, being

sure to align the

index line with

the arrow on

the meter.

Close the lid.

This tube is the

blank or zero.

Rinse and fill a

colorimeter tube

(0290) to the 10

mL line with

standard

solution. Cap

and wipe dry.

React a standard

that is in the range

of the reagent

system, and similar

to the expected

range of the sample.

Follow the

individual test

procedure.

Wipe the tube clean with a

lint-free cloth.

2.50

ppm

Push the

button to turn the

meter on. Press the

button

and hold it for 2

seconds until

is displayed.

Release the button

to take a zero

reading (0 ppm).

Insert the

tube into the

chamber,

being sure to

align the

index line

with the

arrow on the

meter. Close

the lid.

Push the

button. If the

displayed value is not the same as

the value of the

reacted standard

(within the

specification

limits), continue

with the

calibration

procedure.

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

2.55

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

bla

READ

ZERO

bla