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Table of contents
Specifications
on page 3
General information
on page 4
User interface
on page 7
Startup
on page 8
Specifications
Specifications are subject to change without notice.
Specification
Details
Measurement method
Nephelometric
Regulatory
Meets ISO 7027, DIN EN 27027, DIN 38404 and
NFT 9033
ASTM D7315 - Standard Test Method for
Determination of Turbidity Above 1 Turbidity Unit
(TU) in Static Mode
ASTM D6655 - Standard Test Method for
Determination of Turbidity Below 5 NTU in Static
Mode
Light source
Light-emitting diode (LED) at 860 ± 30 nm
Measurement modes
FNU and NTU
Range
FNU (manual range): 0–0.999, 0–9.99, 0–99.9,
0–1000
FNU (auto range): 0–1000
NTU (manual range): 0–0.999, 0–9.99, 0–99.9,
0–1000
NTU (auto range): 0–1000
1, 2
Accuracy
±2% of reading plus 0.01 FNU/NTU from
0–1000 FNU/NTU
1
Turbidity specifications identified using recently prepared formazin standard and matched 1-inch sample cells.
2
Intermittent electromagnetic radiation of 3 volts/meter or greater may cause slight accuracy shifts.
Standard operation
on page 9
Maintenance
on page 14
Troubleshooting
on page 14
Specification
Details
Resolution
Turbidity: 0.001 FNU/NTU (on lowest range)
Repeatability
±1% of reading or 0.01 FNU, whichever is greater
(under reference conditions)
Response time
Signal averaging off: 6.8 seconds
Signal averaging on: 14 seconds (when
10 measurements are used to calculate the average)
Stabilization time
Immediately
Reading modes
Manual or auto range, signal averaging on or off
Power requirement
115–230 VAC, 50/60 Hz (automatic power selection)
28 W maximum
Pollution
2; II
degree/installation
category
Protection Class
1
Operating conditions
Temperature: 0 to 40 °C (32 to 104 °F)
Relative humidity: 0–90% at 25 °C, 0–75% at 40 °C,
noncondensing
Altitude: 2000 m (6560 ft) maximum
Indoor use only
Storage conditions
–40 to 60 °C (–40 to 140 °F), instrument only
Interface
RS232C serial interface by way of DB9 subminiature
D-shell connector for data output to computer or
printer, and data input (command). No handshaking.
English 3
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