Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 15)

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Section 2 Specifications
2.1 Technical specifications
Specifications are subject to change without notice.
Table 1 Technical specifications
PERFORMANCE SPECIFICATIONS
Measuring range
0 to 10,000 ppb freely programmable
0 to 200 ppm with K-Kit option
Accuracy
Non-cationic application:
± 0.1 ppb or ± 5% of reading, whichever is greater
Cationic application:
± 2 ppb or 5% reading, whichever is greater
Repeatability
< 0.02 ppb or 1.5% reading, whichever is greater within 10°C
variation
Average response times at 25°C
with a maximum
ΔT =15°C between
channels
T90% ≤ 10 min
Concentration step
from one channel to
another
Max. temp
variation
(°C)
Time to reach accuracy 0.1
ppb or 5%
up down
0.1 ↔ 5 ppb 3 9 min 27 min
0.1 ↔ 50 ppb 3 11 min 41 min
0.1 ↔ 200 ppb 3 9 min 45 min
< 0.1 ↔ 1 ppb (1) 3 29 min 36 min
0.1 ↔ 50 ppb 15 11 min 41 min
Electrode type pH glass electrode
Number of channels 1 to 4
Interference phosphate 10 ppm Measurement variation less 0.1 ppb.
Sample temperature interference < 0.5% / °C
ENVIRONMENTAL REQUIREMENTS
Typical environment
Power station / indoor / demineralized water plant or
instrumentation room
Suspended solids < 2 NTU, no oil, no grease.
Temperature range for storage -20 to 60°C (2 to 140°F)
Relative humidity 10 to 80%
Ambient temperature 5 to 50°C (41 to 122°F)
Sample temperature variation
Stabilization in 10 mins from 15°C to 30°C
Use the static heat exchanger system when the temperature
difference between samples is higher than 15°C
pH range of sample
Non-cationic application: 6 to 10 pH
Cationic application: 2 to 10 pH
Flow rate 6 to 9 L/hour
Pressure 0.2 to 6 bar (3 - 87 psi)
Acidity Less than 250 ppm (equivalent CaCO
3
)
Power supply voltage fluctuation ± 10%
Over voltage category 2 (according to standard EN 61010-1)
Pollution degree 2 (according to standard CEI 664)
Altitude < 2000 m
Measurement category Cat II, Class 1 (overvoltage < 1500V)