937B Controller Instruction Manual
pg. 27
Set DAC Parameter (P unit is torr in Eq)
B
A
Channel A1
7.20E+0
6.00E-1
Channel A2
Channel B1
Channel B2
Channel C1
Channel C2
Combined
V=AlogP+B
V=AlogP+B
V=AP
V=AP
V=AlogP+B
V=AlogP+B
Equation
1.00E+2
7.20E+0
6.00E-1
7.20E+0
6.00E-1
1.00E+3
7.20E+0
6.00E-1
Figure 6-5 Setting DAC Logarithmic and Linear Analog Output
10
When selecting A from the front panel, only multiples of 1, 2, and 5 are allowed. Following are
some examples for A corresponding to P
max.
P
max
1×10
-3
2×10
-3
5×10
-3
1×10
-2
1×10
2
2×10
2
5×10
2
1×10
3
1.5×10
3
A
1E+4
5E+3
2E+3
1E+3
1E-1
5E-2
2E-2
1E-2
8.4E-3
If a 10V linear output is needed at a pressure different from that given above, it
can be entered via serial communication using the DLAn and DLT commands outlined
in Section. 9.14.
14. FV (firmware version) Information
The firmware version for all of the modules installed in the 937B is displayed when Display is
selected. The serial numbers for all detected modules are also displayed, as shown in Figure 6-6.
Firmware Version and SN
Slot A
1102114509
CC
1.00
Slot B
1103104503
CM
1.00
Slot C
1105083309
PR
1.00
Analog IO
1101154102
AIO
1.00
Comm
1102104501
Com
1.00
Main
1106031428
Main
1.00
Detected
board
Firmware
Version
Serial
Number
Figure 6-6 System Firmware and Serial Number Information Displayed
10
To keep the analog output unaffected by the pressure unit change, the pressure unit in these equations
is fixed to Torr.