Technical Specification - Elcometer 138/2 User Manual

3 TEST PROCEDURE (continued)
3.6 TESTING FOR pH
1 Remove a test strip from the plastic
container marked 'pH 0 - 14' and replace
the lid on the container immediately.
The test strips included in the kit have a

shelf life determined by the manufacturer.
Before using a test strip, always check that
the expiry date has not been exceeded.
The expiry date is marked on the test strip
container. Further information concerning
the use of test strips can be found in the
manufacturers' instructions included in the
test strip container.
2 Insert the coloured end of the test strip into
the solution to a depth sufficient to cover
all coloured squares.
3 Remove the test strip from the solution
and shake off excess liquid.
4 Holding the test strip as shown, compare the test strip with the
coloured scale on the paper insert inside the plastic container.
Determine which of the scale colour groups coincides most with
that of the test strip.
5 Read of the corresponding pH value (0 to 14).
Note: For weak solutions, leave the test strip immersed in the solution for a period of
up to 10 minutes until there is no colour change, then proceed to step 3 above.

4 TECHNICAL SPECIFICATION

4.1 BRESLE PATCH
Patch Size
Test Area
Sample Volume
4.2 TEST STRIPS - MEASURING RANGE
Chloride
Iron
pH
www.elcometer.com
5cm x 5cm
2
12.5cm
3ml
-
30 to 600ppm Cl (0.005 - 0.1% NaCI)
2
(12 - 240µg/cm of ISO Salt Mix)
3 - 10 - 25 - 50 - 100 - 250 - 500mg/l Fe in 3ml of
water from 12.5cm area
0 to 14 pH
pH 0 - 14
2
R
2+
en-6