PART ONE - INTRODUCTION
SECTION 2 - SPECIFICATIONS
Rev. 2-300
Accu4™ Low-range Turbidimeter System
17
S
ECTION
2
2.1 Model 8320 Low-range
Turbidity Sensor
Operational
Mechanical
2.2 Model T53 Analyzer
Operational
Flow Rate................................... 0.05 to 7 GPM (0.19 to 26.5 LPM)
Ambient Conditions .................... 32-140
°
F (0-60
°
C)
Sample Temperature Range....... 32-140
°
F (0-60
°
C)
Pressure Range:
Standard Sensor Design........ 0-50 psig at 68
°
F (0-3.4 bar at 20
°
C)
High Pressure Design............ 0-150 psig at 68
°
F (0-10.2 bar at 20
°
C)
Pressure Drop:
Standard Sensor Design........ 0.0017 psig at 0.1 GPM (0.0001 bar at 0.36 LPM)
High Pressure Design............ 0.165 psig at 1.0 GPM (0.012 bar at 3.8 LPM)
Residence Time ......................... 9.5 seconds at 1 GPM (3.8 LPM)
Air Venting ................................. Integral bubble trap for 0.05 to 0.5 GPM (0.19 to
1.8 LPM) flows. Installation of restrictor valve on
the sensor outlet is recommended for flows
above 0.5 GPM (1.8 LPM) with air in sample.
Light Sources ............................. Two near-infrared (860 nM wavelength) LEDs
Sensor Flow Configuration ......... Flow-through design
Process Connections.................. 1/2 inch NPT female standard; adaptable to
3/8 inch or 1/4 inch NPT, barb or tube fittings
Wetted Materials ........................ PVC, polycarbonate, polystyrene, PPO,
nitrile, and Buna-N
Cleaning Method ........................ Water rinse, wipe surfaces
Enclosure:
Standard Sensor Design ....... NEMA 4X (
≅
CSA type 4;
≅
IP65), molded and
fiberglass-reinforced polyester (flame retardant)
with four integral tabs for surface mounting
High Pressure Design............ NEMA 4X (
≅
CSA type 4;
≅
IP65), PPO struc-
tural foam (V-0 flammability rating per U.L. 94
test) with four integral tabs for surface mounting
Mounting Configurations............. Surface or pipe mount
Net Weight ................................. 10 lbs. (4.5 kg) approximately
Display....................................... Graphic dot matrix LCD, 128 x 64 pixels with
LED backlighting; 1/2 inch (13 mm) main
character height; 1/8 inch (3mm) auxiliary
information character height; menu screens
contain up to six text lines
Measurement
Auto-ranging Scale
Turbidity................................ 0.000-100.0 NTU with auto-ranging and decimal
point shift above 1.000 NTU and 10.00 NTU
(same for other measurement units)
mA Outputs (1 and 2)............ 0.00-20.00 mA or 4.00-20.00 mA
Ambient Conditions:
Operation.............................. -4 to +140
°
F (-20 to +60
°
C); 0-95% relative
humidity, non-condensing
Storage................................. -22 to +158
°
F (-30 to +70
°
C); 0-95% relative
humidity, non-condensing
Relays: Types/Outputs ...................Four electromechanical relays; SPDT (Form C)
contacts; U.L. rated 5A 115/230 VAC, 5A @ 30
VDC resistive
Operational Mode ..............Each relay (A, B, C, and D) can be assigned to be
driven by the measured turbidity or diagnostics
Function Modes:
Control...................... Settings for high/low phasing, setpoint, dead-
band, overfeed timer, off delay, and on delay
SPECIFICATIONS