Caen SY 1527 Technical Information Manual - page 8
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Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. A1733-A1833-A1733B-A1833B HV Boards
15/01/2010
9
NPO:
Filename:
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Page:
00101/00:17XXx.MUTx/09 A1733B-A1833B_REV9.DOC
17
8
2. Mod. A1733, A1833, A1733B, A1833B HV Boards
2.1 Functional
description
The Mod. A 1733 – A 1833 are single width boards housing 12 HV channels with either
positive (A 1733P – A 1833P) or negative (A 1733N – A 1833N) polarity.
28 channel double width versions (Mod. A 1733B – A 1833B) have either positive
(A 1733BP – A 1833BP) or negative polarity (A 1733BN – A 1833BN)
1
.
The Mod. A 1733 / A 1733B output channels have 3 kV / 3 mA or 4 kV / 2 mA full scale
range (dip-switch selectable); the Mod. A 1833 / A 1833B output channels offer 3 kV / 3
mA or 4 kV / 2 mA or 4 kV / 200 µA full scale range (dip-switch selectable).
If the output voltage differs from the programmed value by more than 3% of voltage full
scale range, the channel is signalled to be either in OVERVOLTAGE or
UNDERVOLTAGE condition. Moreover, for each channel, a voltage protection limit
SVMAX can be fixed via software with 1 V resolution and the output voltage can not be
programmed beyond this value.
The HV RAMP-UP and RAMP-DOWN rates may be selected independently for each
channel in the range 1
÷ 500 V/s in 1 V/s steps.
The output current is monitored with 20 nA / 200 nA resolution depending on current
range; if a channel tries to draw a current larger than its programmed limit it is signalled
to be in OVERCURRENT condition; the SY 1527 system detects this state as a fault and
reacts according to the setting of the TRIP parameter
2
, namely:
1) TRIP=infinite ( = 1000 s)
When the set output current value is reached the channel behaves like a constant
current generator.
2) TRIP=finite (< 1000 s)
The output current keeps the set value only for programmed time interval and then
is switched off.
The TRIP time (i.e. the maximum time an OVERCURRENT condition is allowed to last)
can be programmed in 0.1 s steps.
The maximum output voltage (VMAX Hardware) can be fixed, through a potentiometer
located on the front panel, at the same common value for all the board channels and this
value can be read out via software.
The boards host also a temperature sensor located on the PCB near the HV channels:
the temperature values measured by this sensor are used to signal Over Temperature
condition on the SY 1527.
The boards are provided with an "HV EN" input that disables the channels when it is not
connected to ground.
1
A 1733B – A 1833B are currently out of stock and no longer produced
2
Refer to the SY1527/SY2527/SY3527 User’s Manuals for details about the TRIP Handling.