Hardware Description; Model Identification System - Hach ORBISPHERE 51 Series User Manual

2.2

Hardware description

The instrument hardware is made of one main board, 2 measurement boards - one for each
measurement channel (= one per sensor), a power supply and a battery pack as options.
The main board includes the controls for power, display, the touch screen, the barometric
sensor, the alarms, and communication ports. The measurement boards perform measurements
and executes commands from the main board. It holds the "Analog outputs" and "Relays" that
send information to external systems, and "Digital Inputs" that receive information from external
systems such as a "Hold" input.
A hardware watchdog is activated at program start up, to check that the system is not frozen
(i.e. infinite loop, system crash, etc.). If the watchdog is not refreshed by the software every
minute, the measurement display, the relays and the analog outputs are frozen for up to 2
minutes. Then the reset shuts down the instrument for 10 seconds and the start-up procedure is
performed. At the same time all the hardware (sensor, measurement board) are reset.
2.3

Model identification system

The analyzer identification number and the instrument serial number are located on the label on
the back panel, and can be found on order confirmation and invoice papers.
The different models available are described in the following matrix.
Model number matrix
5 1 1
5 1 1 /
Example: 511 / FK0 / W1C1P0N0
• Analyzer model 511 multi channel
• One hydrogen TC sensor and one oxygen LDO sensor
• Wall mounted
• 100-240 VAC
• 0/4-20 mA analog output
• PROFIBUS-DP / RS-485
• External pressure sensor
E K 0
Nitrogen TC sensor + Oxygen LDO sensor
F K 0
Hydrogen TC sensor + Oxygen LDO sensor
W Wall
P Panel
1 100-240 VAC
2 10-30 VDC
C 0/4-20 mA
K 0 / C 1 P 0 N 0
1 PROFIBUS-DP / RS-485
P External pressure
Specifications
15