Hach FT660 sc Manual Básico Del Usuario página 3

Specifications
Specifications are subject to change without notice.
Specification Details
Range 0.000–5000 milli-Nephelometric Turbidity Units
(mNTU)
(0–5.0 NTU with +10% over-range limit)
Measurement units mNTU, mFTU, NTU, FTU, mg/L, Degree
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Over-range limit +10%
Method compliance USEPA Approved for drinking water applications by
Method 10133
Lowest expected reading 7 mNTU
Accuracy ±3% of reading or ±5 mNTU (whichever is greater)
Repeatability ±0.42% at 50 mNTU
±0.3% at 800 mNTU
Resolution 0.001 mNTU on lowest range
0.1 mNTU on highest range
Calibration Single point at 800 mNTU ±50 mNTU
Calibration frequency Every 3 months (or as per regulations)
Calibration (wet) Pass/fail criteria or tolerance (standards less than
verification method 1000 mNTU): 25–50 mNTU
Pass/fail criteria or tolerance (standards greater than
1000 mNTU): 5%
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The instrument range is from 0 to 5000 mNTU. The instrument is guaranteed to meet specifications relative to accuracy, repeatability and linearity
up to 5000 mNTU. The instrument will still show a value above 5000 mNTU to the level of 5500 mNTU, but above 5000 mNTU, measurement
performance is not guaranteed. Between 5000 and 5500 mNTU, the warning alarm will flash to tell the operator that the operating range has been
exceeded. An over-range event is also logged. All alarm setpoints are calculated based on the maximum value show (5500 mNTU).
Specification Details
Calibration (dry) Verification level: 20–50 mNTU
verification method
Performance default: ±5 mNTU of the identified
baseline value
Method precision: less than or equal to 5% relative
standard deviation (RSD)
Signal averaging No averaging, 6, 30, 60 or 90 seconds
Sample light source Class 1 Laser Product with embedded 7.5 mW,
670 nm, Class 3B Laser Source
Complies with 21 CFR 1040.10 except for deviations
pursuant to Laser Notice No. 50, dated June 24,
2007. FDA Laser Accession No. 9911570
Power requirement 10.5 to 13.2 VDC at 1.5 VA
Operating conditions 0 to 40 °C (32 to 100 °F), 5–95% non-condensing
Storage conditions –20 to 60 °C (–4 to 140 °F)
Sample requirements Temperature: 0 to 50 °C (32 to 121 °F)
Flow: 100–750 mL/minute (1.6–11.9 gal/hour)
Recorder output 0–20 mA or 4–20 mA
The output span is programmable over any portion of
the 0.000–1000 mNTU range.
Sample inlet fitting ¼-in. NPT female, ¼-in. compression fitting
Drain fitting ½-in. NPT female, ½-in. hose barb
Tubing requirements Sample inlet: ¼-inch OD rigid or semi-rigid tubing
Drain: ½-inch ID flexible plastic tubing
Dimensions 25.4 x 30.5 x 40.6 cm (10 x 12 x 16 in.)
(W x D x H)
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