Section 1 Specifications - Hach 1720E User Manual

Section 1
Range
Measurement Units
1
Accuracy
1
Linearity
Resolution (Displayed)
Repeatability
Response Time
Sample Flow Required
Storage Temperature
Operating Temperature
Sample Temperature
Range
Operating Humidity
Power Requirements
Sample Inlet Fitting
Signal Average Time
Dimensions
Sensor Cable Length
Mounting Options
Shipping Weight
Calibration Methods
Specifications
Specifications are subject to change without notice.
Table 1 1720E Low Range Specifications
0–100 nephelometric turbidity units (NTU)
mg/L, NTU, TE/F, FTU, Degree
± 2% of reading or ± 0.02 NTU (whichever is greater) from 0 to 40 NTU;
± 5% of reading from 40 to 100 NTU (when calibration is performed at 20.0 NTU with the
offset turned off).
Better than 1% 0–40 NTU on formazin. Allows for accurate calibration at high turbidity values.
0.0001 NTU up to 9.9999 NTU; 0.001 NTU from 10.000 to 99.999 NTU; 0.01 NTU at 100.00
NTU
Better than ±1.0% of reading or ±0.002 NTU, whichever is greater
For a full-scale step change, initial response in 1 minute, 15 seconds. Varies with flow rate,
see the table below. The response time is also dependent on the signal averaging time, which
is user selectable.
% Step Change
10
50
90
99
250 to 750 mL/minute
–20 to 60 °C (–4 to 140 °F)
0 to 50 °C (32–122 °F) for single sensor system, 0 to 40 °C (32–104 °F) for two sensor system
0 to 50 °C
5 to 95% non-condensing
12 VDC ± 5%, 12.5 Watts maximum
1
/ barb fitting to ¼-inch NPT male adapter
8
no averaging, 6, 30, 60, and 90 seconds, user selectable. Default is 30 seconds.
Turbidimeter body and cap: 25.4 x 30.5 x 40.6 cm (10 x 12 x 16 inches)
1.8 m (5.9 ft); optional 7.62 m (25 ft)
Turbidimeter Body and Head Assembly: Wall; floor stand
1720E Series 2 Turbidimeter and Controller: 6.31 kg (13.5 lb); 1720E Turbidimeter only: 4.71
kg (10 lb)
®
1. StablCal (stabilized formazin) – primary or wet calibration of the instrument.
Recommended at 20.0 NTU.
2. Formazin – user-prepared primary or wet calibration of the instrument. Recommended at
20.0 NTU.
3. Multi-sensor calibration – Performed with a specialized calibration procedure for up to
eight sensors on a single set of fresh StablCal
Flow Rate
750
1¼ minutes 1½ minutes
2 minutes 2½ minutes
3½ minutes 3½ minutes
4 minutes 5 minutes
®
500 250
2½ minutes
6 minutes
9 minutes
12 minutes
standards.
3