Page 8 February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930
Introduction
Purpose and scope
This document is intended to give the reader knowledge of how to operate and maintain the Aanderaa ZPulse
®
Doppler
Current Sensor 4420/4830/4520/4930-series. These sensors are described in a single manual since the measurement
principle and electronics is the same for all sensors. 4420 and 4830 are Shallow Water (SW) units with maximum depth
rating 300meter. 4520 and 4930 are available in two versions 3000meter Intermediate Water (IW) and 6000meter Deep
Water (DW) version. 4420 and 4520 are without temperature and are mainly used with the SeaGuard RCM to measure
current. 4830 and 4930 also measure temperature as an extra parameter.
The sensor is designed to fit directly on the top-end plate of SeaGuard or SeaGuardII Platform using a sensor foot or in
a string system connected to SmartGuard or SeaGuard String logger using AiCaP. The sensor can also be used as
stand-alone sensor using RS-232. The R-version of each sensor is only RS-422 output and is intended for stand-alone
use with longer cables than can be used with the RS-232 version. There is hardware differences between a standard
version and a R-version so this need to be specified when ordered.
Aanderaa Smart Sensors utilize common communication protocols at the RS-232 and RS-422 interface where the
Smart Sensor Terminal protocol is a simple ASCII command string based protocol and the AADI Real Time is an XML
based protocol. The common updates of these protocols are called framework 3, and was released August 2012 for
most of the Aanderaa smart sensors (See Appendix 1 Product change notification: Frame Work3). When used
together with one of the Aanderaa Dataloggers the can bus based AiCaP communication protocol is used.
To configure and control the sensor we use sensor properties. A complete list of user accessible sensor properties is
listed in chapter 1.7. The sensor properties are divided in 4 groups with different access levels. Some properties may
be set on or off when others may contain different values. To change these setting you can either use AADI Real-Time
Collector for stand-alone use described in CHAPTER 2, AADI Real-Time collector for sensor connected to SeaGuard
with plug bar assembly, SeaGuardII or SmartGuard described in CHAPTER 3, Touch screen for sensor connected to
SeaGuard with display described in CHAPTER 4 or terminal software like Terra Term for stand-alone sensor, described
in CHAPTER 6.
The sensor has 3 different alternatives for Compass calibration. This need to correspond with the installation and use,
otherwise it might be a deviation in the calculated current direction. The alternative calibration is: only up, only down or
both. This calibration can only be performed at the factory. If nothing else is specified when ordered the sensor will be
calibrated only up.
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