2 photometry, Photometry – YSI pHotoFlex STD Colorimeter User Manual
Page 68
Technical data
pHotoFlex
®
STD
68
ba76122e01
02/2013
7.2
Photometry
Applicable directives
and standards
EMC
EC directive 89/336/EEC
EN 61326-1/A3:2003
FCC Class A
Meter safety
EEC directive 73/23/EEC
EN 61010-1 :2001
UL3101-1
CAN/CSA-C22.2 No. 1010.1-92
Climatic class
VDI/VDE 3540
IP protection class
EN 60529:1991
Optical measuring prin-
ciple
LED photometer with filter
Interference filter
436 nm, 517 nm, 557 nm, 594 nm, 610 nm, 690 nm
Accuracy:
± 2 nm
Photometric reproduc-
ibility
0.005 or better
Photometric resolution
0.001
Warm-up time
none
Measuring time
approx. 2s
Measured parameters
Concentration (method dependent, selectable display type), absor-
bance, transmission
Measuring range
Absorbance:
-0.200 ... +2.000
Transmission:
1 ... 150 %
User-defined programs
100
Resolution Transmis-
sion
1.00 ... 9.99
0.01 %
10.0 ... 150
0.1 %