TU 7685 - TU 7685.010
Turbidity and Suspended solids
Add the following to the common
Features/Specifications of the 7685 Series shown overleaf
• Input from preamplified sensor
• Manual, automatic operation
• Dual filter software
• 0/20 or 4/20 mA selectable output, programmable on the
input scale
• 2 Set point with min/max function, hysteresis and
adjustable delay
• Alarm: min/max turbidity, set point timing, dirty lens,
empty cell, external light too high
• Check signal of dirty lens
• Autoclean relay with programmable cycle repetition,
cleaning and holding time
• Easy to use sotware with 3 access levels:
display, calibration and configuration of process
parameters
Additional features of TU 7685.010
• Manual, automatic, or simulated operating mode
• Selection of the probe TU820 (USEPA 180.1)
• Adjustable coefficient for mg/l/NTU both PSL and SiO2
• Manual or automatic zero calibration
• Fine adjustment of the analog output
• On/Off of the hold of the analog output during the
calibration
• Burned lamp alarm
• Continuous or flashing alarm
In-line measuring probes
• TU 810 Body in PVC. Method EN 27027 ISO 7027
• TU 820 Body in PVC. Method USEPA 180.1
• TU 8105 Body in PVDF. Method EN 27027 ISO 7027
Submersible measuring probe
• TU 8182 Body in PVC. Method EN 27027 ISO 7027
Accessories for in-line measuring probes
• TU 910 Flow cell for TU 810, TU 8105 and TU 820
• SZ 9481 Cable 10 m + connector
• SZ 9483 Cable 30 m + connector
Specifications
Range TU 7685 : 4.000/400.0 NTU - 40.00/4000 NTU
9.999/999.9 mg/l - 99.99/9999 mg/l of SiO2
9.999/999.9 ppm - 99.99/9999 ppm of SiO2
Range TU 7685.010 : 4.000/400.0 NTU - 40.00/4000 NTU
4.000/400.0 mg/l - 40.00/4000 mg/l of SiO2
9.999/999.9 ppm - 99.99/9999 ppm of SiO2
Resolution : 0.05% of scale
Zero of the probe : 0.0/10.0 % f.s.
Sensitivity : 80.0/120.0 %
Filter software 90%RT : 5/220 s for small/large variations
Set point A/B : ON-OFF
Hysteresis : 0/10 % of the scale
Relay delay : 0.0/99.9 s
Relay contacts : 5 A 220 V
Low/high alarm : 0 to full scale
Autoclean : Manual/Auto+Manual
Analog output : 0-20/4-20 mA isolated
Response time : 10 s for 98% of input
R max : 600 ohm
Humidity : 95% without condensate
Power : 110/220 Vac +/-10% 50/60 Hz 5 VA max
Isolation : 4000 V (IEC 348)
Dimensions : 96x96x155 mm (1/4 DIN)
Options
091.3713 : Dual analog output
091.4141 : 9/36 VDC power supply