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Re: [APD] double dropchecker setup
The perl code I use for labeling my pH cards follows, fwiw. It assumes
you're using the API freshwater pH color card. Example output:
$ dropchecker 3.0
For a 3.0 dKH reference solution...
pH 6.0 yellow 90 ppm co2
pH 6.4 yellow-green 35 ppm co2
pH 6.6 light-green 22 ppm co2
pH 6.8 green 14 ppm co2
pH 7.0 green 9 ppm co2
pH 7.2 dark-green 5 ppm co2
pH 7.6 blue-green 2 ppm co2
$ dropchecker 3.4
For a 3.4 dKH reference solution...
pH 6.0 yellow 102 ppm co2
pH 6.4 yellow-green 40 ppm co2
pH 6.6 light-green 25 ppm co2
pH 6.8 green 16 ppm co2
pH 7.0 green 10 ppm co2
pH 7.2 dark-green 6 ppm co2
pH 7.6 blue-green 2 ppm co2
steve
--
#!/usr/bin/perl -w
%colors = qw( 6.0 yellow 6.4 yellow-green 6.6 light-green
6.8 green 7.0 green 7.2 dark-green 7.6 blue-green );
if ( $ARGV[0] ) { $kh = $ARGV[0] } else { $kh = 4; }
print "For a $kh dKH reference solution...\n";
for my $ph qw(6.0 6.4 6.6 6.8 7.0 7.2 7.6) {
my $co2 = sprintf("%d", 3 * $kh * 10**(7-$ph));
printf "pH $ph %-12s $co2 ppm co2\n", $colors{$ph};
}
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