5. Introduction
5. INTRODUCTION
The data logger
ALMEMO
®
2890-9 is a new instrument from the unique prod-
uct range of measuring devices that are all equipped with the ALMEMO
®
con-
nector system, which has been patented by Ahlborn GmbH. The intelligent
ALMEMO
®
connector provides important advantages with regard to the con-
nection of sensors and peripherals as all parameters are stored in an EEP-
ROM within the connector. As a result, the programming that usually has to be
performed for the connection is not required. All sensors and output modules
can be connected to all ALMEMO
®
measuring devices in the same way. The
operation and programming is identical with all units. Therefore, all of the
ALMEMO
®
measuring system items listed below are described, in detail, in a
separate ALMEMO
®
manual that is supplied with every device:
Detailed description of the ALMEMO
®
system (manual section 1)
Overview of the device functions and measuring ranges (manual section 2)
All sensors with basic principles, operation, technical data (man. section 3)
The options for connecting existing sensors (manual section 4)
All analog and digital output modules (manual section 5.1)
The interface module RS232, fiber optics, Centronics (manual section 5.2)
The entire ALMEMO
®
networking system (manual section 5.3)
All functions and their control via the interface (manual section 6)
A complete interface command list with all print outputs (manual section 7)
These operating instructions only cover features and controls that are specific
for a certain device. As a result, many sections will often provide a note refer-
ring to the more detailed description within the manual (man. sect. x.x.x).
5.1 Function Range of the ALMEMO 2890-8
The ALMEMO
®
2890-9 data logger has 9 electrically isolated measuring inputs
- suitable for all ALMEMO
®
sensors. The measuring possibilities are virtually
unlimited; there are 36 channels in the sensor connectors and 4 device-internal
function channels - with over 70 measuring ranges. For operation purposes the
device incorporates an LCD graphics display, a thumb-wheel, and a soft-key
keypad with cursor block. User menus can be configured to adapt the display
for any application. The data logger function is carried out by a real time clock
and a 512kB EEPROM memory for approximately 100000 measured values.
Two output sockets allow for connecting any ALMEMO
®
output modules, for
example, the digital interface, memory card, analogue output, trigger input or
alarm contacts. Several devices can be networked by simply connecting them
with network cables.
10 ALMEMO
®
2890-9