Instruction manual

3.5 CURRENT CHANNEL EXTERNAL GAIN SELECT
The current channel gain can also be modified through external resistance. The
current channel preamplifier and TB1 are configured as follows:
Figure 3.5 Current Channel External Gain Select
In normal operation there are jumpers between TB1-2 and TB1-3, TB1-4 and Tb1-5.
To change the gain of the amplifier, remove the link between TB1-2 qnd TB1-3. Insert
an external resistor between TB1-2 and TB1-3. The gain of the amplifier is:
Gain =
External Re sistor +10K
10K
3.6 EXTERNAL LIMIT PROGRAMMING
+ V LIM V, -V LIM V, +I LIM V and -I LIM V are controlled from the front panel.
Jumpers are installed at the factory on TB1 between the voltage limit references and
inputs. It is possible to use external levels for the voltage and current limits.
To change the limits externally, remove the jumpers on TB1 terminals (11-12), (13-14),
(15-16), (17-18) and install potentiometers as shown in Figure 3.6
Figure 3.6 External Limit Programming
* Always use resistance values for the potentiometers greater than 10KΩ
For additional information about TB1 pins 11-18, please refer to A100 Schematic
01-000-234 and overall schematic 01-469-001.
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83-469-001 Rev. B