Operation and configuration
9. OPERATION AND CONFIGURATION
Measured data acquisition module ALMEMO
®
809 has only a few operating
controls; it is operated mainly via a PC.
9.1 Combination key
The first function of the one and only key ON/OFF - START/STOP (2) has al-
ready been described in Section 6.5.
Press to switch the device ON and press and hold down to switch OFF again.
If the device is on and a cycle has been programmed the same key can be
used to start and stop a measuring operation.
The current operating status is clearly shown by the status LEDs.
9.2 Status LEDs
The status LEDs (3) report the current device status as follows:
ON
Device is switched ON
ON
flashes briefly just once
Device is in sleep mode
START
is lit continuously
Cyclic measuring has started
COM
is lit continuously
Measured values are transmitted to the PC-per output cycle
COM
flashes
Measured values are transmitted to the PC - per scan cycle
REC
is lit continuously
Data is being saved to device memory per cycle.
This also lights up during output from memory.
REC
flashes
Data is being saved to memory per scan cycle
START
flashes briefly just once Once-only measuring point scan is initiated by the PC
COM
flashes briefly just once
Once-only measuring point scan transmits data to the PC
REC
flashes briefly just once
Once-only meas. point scan saves data to device memory
ALARM
Limit value infringement or sensor breakage
ALARM
flashes
Supply voltage to device is too low
9.3 Device address and networking
The ALMEMO
®
809 data logger, like all ALMEMO
®
devices, can also be net-
worked. To communicate with networked devices it is absolutely essential that
each device should have its own dedicated address; this is because only one
device should respond per command. Before each network operation therefore
all measuring instruments must be set, by means of their code switches (1), to
different device numbers.
Example:
Module address 01 0 1
ALMEMO
®
809
21
