Brooks Instrument SLA5810/20 User Manual
Page 25
3-5
Section 3 Operation
Models SLA5810 and SLA5820
Installation and Operation Manual
X-PR-SLA5800-PC-eng
Part Number: 541B091AAG
July, 2010
E. Calibration Select Pin
Connector pin 13, on the15 pin ‘D’ connector allows selection of one of ten
configurations stored in the device. This pin is designed to accept pull-down
resistors referenced to signal common (pin 10).
Table 3-1 shows typical resistor values required for selecting configurations 1
through 10. Note, these resistor values should be within ± 1% tolerance. The
default condition is with no resistor connected which activates Calibration #1.
When the calibration select pin changes state, the device performs any
required processing to change the configuration, then returns to normal
operation. If the device determines that the selected configurations is not
valid, (where applicable) the valve is driven to the closed state and the output
signal is set to zero. Typical time required to change configurations is
approximately 1.0 second.
NOTE: It is recommended to change configurations during no-flow conditions.
F. PC Zero
The pressure controller has been zeroed at the factory to a known vacuum
condition. It should not require any further adjustment.
Table 3-1 Typical Resistor Values for Configuration Selection
DEFAULT = CAL # 1 (External resistor not connected)
CAL #
RESISTOR VALUE (K ohms)
1
Open
2
Shorted
3
665
4
324
5
191
6
124
7
80.6
8
52.3
9
30.9
10
15