PART ONE - INTRODUCTION
SECTION 1 - GENERAL INFORMATION
Rev. 2-300
Accu4™ Low-range Turbidimeter System
15
1.2 Modular Construction
1.3 Retained
Configuration Values
1.4 Analyzer and Sensor
Serial Numbers
•
ANALYZER FAIL
•
SOURCE 2 FAIL
•
CHAMBER DIRTY
•
DETECT 1 FAIL
•
CHAMBER UNKNOWN
•
DETECT 2 FAIL
•
SOURCE 1 FAIL
To determine the condition causing the warning message,
display the “STATUS screens” in the TEST/MAINT menu
branch. For more details, refer to Part Three, Section 6.1.
During calibration, CONTROL and ALARM relay on/off
states are affected in the same way as the analog outputs
by the “(HOLD/XFER/ACTIVE) OUTPUTS” screen selec-
tion. These relays are also held at their present on/off
states, transferred to desired preset on/off states, or remain
active to respond to measured turbidity. For complete relay
setup details, including transfer setup, see Part Three, Sec-
tion 4.4.
The modular construction of the analyzer simplifies field
servicing and provides electrical safety. The front door/
keypad assembly and the sensor use voltages no greater
than 24 VDC, and are completely safe to handle.
Opening the analyzer door accesses terminals inside the
enclosure for electrical connections. Line power must be
connected to specifically designated terminals on TB3.
WARNING:
REMOVE LINE POWER BEFORE NEARING THIS AREA
TO AVOID ELECTRICAL SHOCK.
All user-entered configuration values are retained indefi-
nitely, even if power is lost or turned off. The non-volatile
analyzer memory does not require battery backup.
A label with the analyzer model number, serial number,
build date, and other items is affixed to the top of the ana-
lyzer enclosure. A similar label is affixed to the sensor.