Jenway 3540 - Manual (Page 79)

Most recent calibration information
Eo value
Slope efficiency
Buffer type
This will also be followed by result data dependent on the mode selected. Time and date of
the stored readings will be displayed.
An asterisk (*) indicates that manual temperature compensation is being used.
The letter R will indicate a reading in the Relative mV mode.
A batch number will identify each reading.
A calibration will reset the print out and the header information will be re-printed.
To obtain a print out of stored readings, enter the RESULTS MODE and press the PRINT
key. A print out of all filled memory locations will then be generated.
10.6 Alarm
Outputs
The 3540 provides two open collector alarm outputs. These can be accessed using the two
4mm phono sockets located on the rear panel of the 3540. To set the alarm limits at which
these are activated refer Section 4.2 and 5.4.
To use the alarm outputs, they should be ENABLED in the ALARM SET UP screen (refer
Section 4.2 and 5.4). They will operate in all measurement modes as set. The alarm outputs
will remain active until the alarm condition is no longer evident or the alarm limits are reset in
the ALARM SET UP menu.
For the High alarm output use the red 4mm connector.
For the Low alarm output use the black 4mm connector.
The open collector connections can be regarded as a switch that is normally open but closes
to ground when the relevant alarm is tripped. The outer contact on the connectors is at
ground potential. The inner contact is normally open but will switch to ground as above.
An external supply of 5 to 12V dc should be supplied, with the negative (zero volts) contact
connected to the outer contact of the relevant alarm socket. The positive supply should go
via a fuse and/or limit resistor to the load (lamp, indicator, relay coil etc) with the other side of
the load connected to the centre contact of the relevant alarm socket.
The internal transistors can dissipate 500mW; this is equivalent to 100mA at 5V, 55mA at 9V
or 40mA at 12V these limits should not be exceeded.
For further information please contact your local distributor or the manufacturer.