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TE10P chp 9, 10 & index
6/28/00
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Page 9-3
Maintenance
DIAGNOSTICS
Diagnostic unit
To make maintenance easier and to diagnose the state of the controller, it is
advisable to use the Eurotherm type 260 diagnostic unit.
The diagnostic unit is fitted with a flat ribbon cable which plugs into the 20-pin
connector. This diagnostic connector is located:
·
on the top part of the controller for units rated 16A to 100A;
the connection is accessible without opening the access door;
·
on the driver board accessible with the front door open for 125A to 400A
units.
’Scope’: measured signal output
(oscilloscope or rms voltmeter)
0V (ground)
Diagnostic connector
located on controller
Signal
Digital display of
average values
(4 digits)
V
Flat cable
(delivered with unit)
100 V
ribbon
Scaling switch
ext
off
20
ext
1
20 V
9V power supply:
Battery or rechargable
External signal input
Battery charger
EUROTHERM
diagnostic unit
Figure 9-1 The EUROTHERM type 260 diagnostic unit
Provided with a 20-way switch, the diagnostic unit is used to measure the values
of certain control parameters. In the ‘20V’ position of the scaling switch, the
digital display shows two decimal places to give a precise reading of the selected
values.
The diagnostic unit display corresponds to the average values of the rectified
signals.
Because of the ‘Scope’ output, the signals may also be viewed using an
oscilloscope, or measured with an rms reading voltmeter for the AC component
(voltmeter in AC position).
The following table gives a description of each position of the EUROTHERM
type 260 diagnostic unit, together with typical values of the signals measured.
TE10P User manual
9-3