PART ONE - INTRODUCTION
SECTION 1 - GENERAL INFORMATION
Rev. 2-300
Accu4™ Low-range Turbidimeter System
13
P A R T O N E - I N T R O D U C T I O N
S
ECTION
1
1.1 Capability Highlights
High Accuracy with
Minimal Maintenance
MEASURE Screen
Passcode-protected
Access
Calibration Methods
The Accu4™ Low-range Turbidimeter System employs a
technologically-advanced sensor to provide high measure-
ment accuracy and stability, while reducing maintenance
requirements. It is designed to meet the International Stan-
dards For Measurement of Turbidity [ISO 7027-1984(E)]
and USEPA-approved GLI Method 2. This system has an
auto-ranging measuring scale, enabling continuous moni-
toring over a 0.000-100.0 NTU range with automatic
decimal point positioning.
The Accu4™ Low-range Turbi-
dimeter System automatically provides
increasing
display resolution as measured turbidity decreases.
To
further ensure high measuring accuracy, the Model 8320
sensor eliminates air or gas bubbles in the sample with its
built-in bubble trap. The system is ideal for critical monitor-
ing and controlling applications including potable water,
filtered water, and final product clarity.
With the display in the normal MEASURE screen mode, the
measured turbidity is always shown on the main middle line.
The bottom auxiliary display line, shown in reverse video,
can be changed by pressing the
Ø
Ø
and
×
×
keys
to show
these measurements:
•
Analog Output 1 value (mA)
•
Analog Output 2 value (mA)
For security, you can enable a passcode feature to restrict
access to configuration and calibration settings to author-
ized personnel only. See Part Three, Section 4.5 for details.
Three methods are available to calibrate the system. See
Part Three, Section 5.1 for details.
With the optional Cal-
Cube™ assembly, you can conveniently check calibra-
tion any time (Section 6.2).
The mA value for each analog
output can also be calibrated (Section 5.5).
GENERAL INFORMATION