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ATI A15/76 Turbidity Monitor Part 1 - Introduction

O&M Manual

Rev-H (8/11)

Specifications

Electronics Unit

Range: 4/400 NTU (0-4.000, 0-40.00, 0-400.0)

40/4000 NTU (0-40.00, 0-400.0, 0-4000)

9/999 mg/l (or PPM) SiO

(0-9.999, 0-99.99, 0-999.9)

99/9999 mg/l (or PPM) SiO

(0-99.99, 0-999.9, 0-9999)

4/400 mg/l PSL (0-4.000, 0-40.00, 0-400.0)

40/4000 mg/l PSL (0-40.00, 0-400.0, 0-4000)

Auto-ranging over 3 decades of concentration

Sensor Type: 90° Scatter (nephelometer)

Accuracy: ± 5% of reading or ± 0.02 NTU, whichever is greater, on 40/400 scale

± 10% of reading or ±2 NTU, whichever is greater, on 400/4000 scale

Linearity: 0.1% of F.S.

Display: 16 character alphanumeric backlit LCD

Control Relays: Two SPDT relays, 5A @ 220 VAC resistive.

Programmable deadband and time delay.

Control Mode: On/Off

Alarm Relay: Independent SPDT relay, 5A @ 220 VAC resistive.

Programmable for actuation on high/low values or control system failure.

Also indicates dry cell condition, fouled sensor, or high ambient light

Analog Output: Isolated 4-20 mA, 600 ohm maximum load. Programmable output range

user set

Operating Conditions: -20° to +55° C., 0-95% R.H. non-condensing.

Power: 110/220 VAC ±10%, 50/60 Hz.

9-36 VDC Optional, 360 mA max. at 12 VDC

Enclosure: Panel mount standard

NEMA 4X wall mount optional

Sensor

Range: 0-4000 NTU

Sensor Type: LED

Measurement angle: 90-degree scatter (nephelometric)

Response Time: 95% in 10 seconds

Power: ± 12 VDC supplied by monitor, preamplifier in sensor head

Temperature Limits: 0 - 50° C.

Pressure Limits: 0 - 100 PSIG

Connections: 7-conductor sensor cable to monitor, 30 feet standard, 350 feet

maximum

Sensor Materials: Delrin body, Acrylic optical windows

Flowcell Materials: PVC

Flowcell Connections: 4 mm tube fittings (black tubing supplied)

Flowcell Pressure: 0-100 PSIG

Flowcell Temperature: 0-60° C

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