horiba HU-200TB-W SS-120-W, Инструкция по эксплуатации

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Overview
1
Overview
Introduction
This product consists of a converter (HU-200TB-W) and a flow through type turbidity detector
(SS-120-W). This instrument measures the low and high range turbidity accurately with a right
angle scattering/transmission method. Any measured values are displayed to the second
decimal place. Turbidity standard substances are selectable from among Formazin, Kaolin,
and Polystyrene Latex (PSL).
The measuring range is 0 NTU to 2000 NTU for Formazin, 0 to 1000 for Kaolin turbidity and 0
to 100 for PSL turbidity standard. The measuring unit can be switched from turbidity to SS
(suspended solid by mg/L) unit when the standard is Kaolin. In the SS measuring mode, you
can adjust the measured value with a coefficient.
The SS-120-W detector for the HU-200TB-W industrial-use turbidity meter can measure
turbidities with high stability, as the fluctuations in the light intensity are eliminated by using an
LED light source (860 nm) and two photo detectors for the transmitted and scattered lights.
Two transmission outputs (4 mA to 20 mA DC) are provided, and the transmission range is
fixed for transmission output 1. For transmission output 2, a maximum of four transmission
ranges can be specified. Two contacts are output according to the range selected using the
commands sent from the two external contacts or the automatic range changeover function,
which automatically selects the optimum range.
For these three contact outputs, the content of the output can be assigned individually, such
as an upper/lower limit alarm, error, during cleaning, hold state, and during automatic zero
calibration. The delay time can also be set for the contact output.
If an automatic cleaner is installed, the soiled inner surface of the cell, which could interfere
with measurements, can be automatically cleaned. In addition, an optional automatic zero
calibration function has the software and control output as standard features, and these can
be operated by installing an external electric ball valve and a solenoid valve. The operations of
both the cleaning and automatic zero calibration are started according to the internal timer or
commands from external contact.
The operations such as the turbidity measurement data transfer or cleaning commands are
carried out through communications among the converter, detector, and the automatic
cleaner. The sensor cables include 5 wires for the 12 V DC power supply, two-line
communications, and grounding.
When an automatic cleaner is installed, the length of the sensor cable leading to the converter
is 5 m. If it is not installed, the cable can be extended up to 50 m.
Optional products are: span solution that can be used as a substitute for the standard solution,
span bottle (liquid, solid), an automatic cleaner with electric motor, piping kit for a standard
piping assembly, filter unit for preparing zero water, automatic zero calibration assembly
stand.
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The NTU turbidity unit
The measuring structure of the turbidity detector (SS-120-W) does not comply strictly with the
requirement of US EPA180.1. The measuring range of the EPA180.1 is limited within 0 NTU to
40 NTU and the sample over 40 NTU should be diluted to be within 40 NTU.
The SS-120-W outputs the turbidity value by a method of right angle scattering/transmission
with a near-infrared LED light source, the low turbidity of SS-120-W is relational to the turbidity
by EPA180.1 method.
If the NTU turbidity unit is chosen, Formazin should be used.