K-Patents PR-01-S - Manual (Page 52)

INSTRUCTION MANUAL FOR K-PATENTS PR-01-S (-AX/FM/CS) DOCUMENT/REVISION No. INM 1/14
Effective: May 15, 2009
50
** EEPROM WRITE ERROR **:
Error on the processor card: The EPROM did not write constants correctly. Probably component failure.
Action: Change the processor card.
No message: Measure the mA output signal. If this is OK, then the display is probably faulty.
Note. Ambient temperature above specifications may dim the display.
6.4. INDICATING TRANSMITTER
Before investigating the Sensor, it is advisable to make sure that the Indicating transmitter is working. The
Indicating transmitter can be tested separated from the Sensor by the following procedure:
– Power off
– Disconnect cable to sensor
– Power on
Then the diagnostic message should be
"** No Sensor signal **". Any other message indicates fault in the Indicating transmitter.
The Demo mode, Section 4.3. Disconnect all connections to terminals 1 - 14, and make connection as in
Figure 4.30. Then the Serial bus output will work as a sensor head simulator, and the whole Processor card
will be checked, see the block diagram Figure 6.42.
Power supply card
The Power supply card is described by Figure 6.40 (and 6.40a) component layout and Figure 6.41 circuit
diagram.
The following DC powers are supplied by the card:
1. +5V to Processor card. Should be 5V ± 2 %. Typical load about 350 mA, should be below 500 mA.
Indicated by the green LED LD3, see Figure 6.40.
2. +24V to Sensor. Typical value 25V ± 5 %, indicated by the green LED LD2.
3. +24V to serial bus, to supply accessory units, as the Relay unit, Chapter 9. Typical value 25 V ± 5 %,
indicated by the green LED LD1.
The Test point "0V", see Figure 6.40, is also the 0V at the Processor Card, in the Sensor and in the serial bus
to accessory units.