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Figure 7.
Hexadecimal code 0FC0 DIP switch setup
For example, if the Terranova® 752A outputs the hexadecimal code 0FC0, this corresponds to
0000, 1111, 1100, and 0000 in binary notation, respectively. The binary notation, in turn,
provides the individual switch positions as illustrated in
Figure 7
. Therefore, said switch
positions provide the corresponding Terranova® 752A set up as described in
Table 13
.
DIP Switch
State
Description
S1-1
OFF
CHANNEL 1 Positive High Voltage Polarity Symbol
S1-2
OFF
Power Loss Restart Disabled
S1-3
OFF
Mode 0: Standard Operation
S1-4
OFF
S1-7
ON
CHANNEL 1 (Current) Analog Output: 2 mA / V
S1-8
ON
CHANNEL 2 (Current) Analog Output: 2 mA / V
S3-1
ON
RS-232 Enabled
S3-2
ON
S3-5
OFF
Checksum Function Disabled
S3-7
OFF
(Current) Analog Output: Linear
S3-8
OFF
CHANNEL 2 Positive High Voltage Polarity Symbol
Table 13
. Hexadecimal code 0FC0 output
Changing High Voltage Polarity
Each Terranova® 752A channel can be independently set for either positive or negative high
voltage operation. Default high voltage polarity is positive. To change the polarity
:
1.
Turn the unit OFF via the
POWER
switch
2.
Remove the power cord and ion pump cable
3.
Remove the six screws along the edge of the top cover
4.
Carefully lift the top cover and disconnect the fan plug
5.
Remove top cover
6.
Locate and identify the proper HV board for CHANNEL 1 and CHANNEL 2
7.
Locate the HV diode of the respective channel. As shown in
Figure 8
, the HV
diode is the electrical component identified by the arrow.
