Hach FT660 sc Manual Básico Del Usuario página 3

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Specifications
Specifications are subject to change without notice.
Specification
Range
Measurement units
1
Over-range limit
Method compliance
Lowest expected reading
Accuracy
Repeatability
Resolution
Calibration
Calibration frequency
Calibration (wet) verification
method
Calibration (dry) verification
method
Signal averaging
Sample light source
Power requirement
Operating conditions
Storage conditions
Sample requirements
Recorder output
Sample inlet fitting
1
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).
Details
0.000–5000 milli-Nephelometric Turbidity Units (mNTU)
(0–5.0 NTU with +10% over-range limit)
mNTU, mFTU, NTU, FTU, mg/L, Degree
+10%
USEPA Approved for drinking water applications by Method 10133
7 mNTU
±3% of reading or ±5 mNTU (whichever is greater)
±0.42% at 50 mNTU
±0.3% at 800 mNTU
0.001 mNTU on lowest range
0.1 mNTU on highest range
Single point at 800 mNTU ±50 mNTU
Every 3 months (or as per regulations)
Pass/fail criteria or tolerance (standards less than 1000 mNTU): 25–50 mNTU
Pass/fail criteria or tolerance (standards greater than 1000 mNTU): 5%
Verification level: 20–50 mNTU
Performance default: ±5 mNTU of the identified baseline value
Method precision: less than or equal to 5% relative standard deviation (RSD)
No averaging, 6, 30, 60 or 90 seconds
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
10.5 to 13.2 VDC at 1.5 VA
0 to 40 °C (32 to 100 °F), 5–95% non-condensing
–20 to 60 °C (–4 to 140 °F)
Temperature: 0 to 50 °C (32 to 121 °F)
Flow: 100–750 mL/minute (1.6–11.9 gal/hour)
0–20 mA or 4–20 mA
The output span is programmable over any portion of the 0.000–1000 mNTU
range.
¼-in. NPT female, ¼-in. compression fitting
English 3

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