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2) Adjustment
1. Set DIP switch S3 on the JIFA board 66P3800 as follows:
A. When a KP is connected to EX KP (1) of TB1, set S3-#3 ON.
B. When a KP is connected to EX KP (2) of TB1, set S3-#4 ON.
(Refer to the interconnection diagram on pages S-1 and 4-11.)
2. Adjust the potentiometer on the JCN 66P3801 as follows:
A. When KP is fed to EX KP1;
Turn R31 on the JCN board CW gradually until CR21 on the JIFA board starts
flickering. Then, turn R31 CW by one more step.
B. When KP is fed to EX KP2;
Adjust R32 until CR22 starts flickering. Then, turn R32 CW by one more step.
3. Enter the distance (0.1 m) between the transducer of the CI-35/35H and that of the
interfering equipment at the menu 3 screen.
A. For EX KP 1, set it at EX KP I of the menu 3 screen.
B. For EX KP 2, set it at EX KP 2 of the menu 3 screen.
Then, when the receive time of the transmission pulse of the interfering equipment
coincides with a measuring period of current, receive data of that period is ignored, thus
avoiding interference.
Note: When transmitting with the external transmission pulse (KP) taken from an external
device (echosounder, sonar, etc.), the repetition rate of the KP should be more than
500 ms. The repetition rate may become shorter than 500 ms when the range setting
on the external device is less than 100 m. Therefore, set the range on the external
device to more than 100 m.
CR21 starts flickering
Fig. 4-15 Adjustment of R31;
4-19
Advance one more step.
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