Sunday, September 25, 2011
Uni-Safe BNWAS
Another type of BNWAS made in Denmark. It was type approved for DNV, LR, BV, RINA, ABS, GL, NKK, RS, CCS and KR classification. As a system integrator, we had tested this piece of equipment and found quite easy and straight forward to installation on board ship. It comes with a 24 months warranty, so ship owner can rest in peace for any defect if frequent visit to Singapore as spares were available for one to one replacement. It also comes with motion sensor so ship crew need not reset every now and then when alarm sound after the preset period of between 3 - 12 mins. Please see below for specification.
Thursday, July 28, 2011
RS232 Pin-out and self make cable
The purpose of uploading the RS232 Pin-out is for anyone who wish to use laptop or notebook to connect DB9 pin D-Sub for hyper terminal to check/troubleshoot for NMEA serial signal availability or simulate NMEA out from latop to external device.
For new laptop which does not have DB9pin as serial com port, purchase of USB to Serial converter can be easily purchase from any computer shop. Solder a DB9pin female connector with 3 core cable will do the work. Pin 2 = Receive data, Pin 3 = Transmit data, Pin 5 = Ground. When using RS232 com port in laptop to measure RS422 signal on any external device, connect as below.
Laptop RS422 device output
Pin 2 ---------------- TX-
Pin 3 ---------------- NC(Not Connect)
Pin 5 ---------------- TX+
For new laptop which does not have DB9pin as serial com port, purchase of USB to Serial converter can be easily purchase from any computer shop. Solder a DB9pin female connector with 3 core cable will do the work. Pin 2 = Receive data, Pin 3 = Transmit data, Pin 5 = Ground. When using RS232 com port in laptop to measure RS422 signal on any external device, connect as below.
Laptop RS422 device output
Pin 2 ---------------- TX-
Pin 3 ---------------- NC(Not Connect)
Pin 5 ---------------- TX+
Laptop RS422 device input
Pin 2 ---------------- NC(Not Connect)
Pin 3 ---------------- TX-
Pin 5 ---------------- TX+
Monday, May 2, 2011
Sperry Marine Bridge Watch Monitoring System (BNWAS)
This is a container ship. Ship crew has complaint about the bridge watch monitoring alarm has continuously giving visual and audio alarm once the watch alarm generator switches on. Try to press the reset button on reset unit at bridge did not help. The worst is that the alarm has trigger all the way to all alarm panels including Captain's day room where Captain has difficulty falling asleep. So they have to completely switch off the unit.
I attended the ship and checked all fuses and power supply to main watch alarm terminal module were all present. Checked the parameter by putting dip switch in terminal module from 0 to 1. Put the key switch at watch alarm generator to off position. The word - PRO will present. Checked the parameter in the unit from 000 to 019 and it should be shown as the manual setting. I have selected 001 which is owner setting as per IMO requirement. Lower limit alarm = 3 mins, Higher limit alarm = 12 mins. Delay in buzzer alarm = 15sec. Delay in accommodation alarm = 15sec. Delay in crew alarm = 90sec. You can also set to show count down(CD) in counting down state or dormant state = 1 or 0 in parameter.
Found the problem to the constant alarm been activated was due to one of the reset unit been activated(short circuit) and causing the unit to permanent reset. Remove the pin 59 - 29 Ext Device which causes the shorting. The watch alarm unit works in a parallel way where either reset unit within the network shorted, all reset unit will be shorted. So looking at the terminal module, 43 - 13, 45 - 15, 47 - 17, 49 - 19, 51 - 21, 53 - 23, 55 - 25, 57 - 27, 59 - 29, 60 - 30 should measure +24Vdc. If no voltage were received, it means one of them must be shorting. How then do you know which one is shorting since all connected in parallel? Removed wire 43, 45, 47, 49, 51, 53, 55, 57, 59, 60 and connect to a temporary terminal block. Measured in ohm to 13, 15, 17, 19, 21, 23, 25, 27, 29, 30 respectively. Means the red probe goes to 43, the black probe goes to 13 in ohm range using a multimeter. After fixing the problem, tested count down of 12 mins, 6 mins and 3 mins working perfectly ok. Also tested the time diagram works as per IMO requirement.
Please see the parameter setting below and time diagram according to IMO requirement.
This type of BNWAS is simple and easy to install and operate. The cost is also reasonable consider the IMO regulation kick in for most of the ship owner to fulfill the IMO regulation requirement. For enquiry, please contact Sperry Marine for quotation
.
I attended the ship and checked all fuses and power supply to main watch alarm terminal module were all present. Checked the parameter by putting dip switch in terminal module from 0 to 1. Put the key switch at watch alarm generator to off position. The word - PRO will present. Checked the parameter in the unit from 000 to 019 and it should be shown as the manual setting. I have selected 001 which is owner setting as per IMO requirement. Lower limit alarm = 3 mins, Higher limit alarm = 12 mins. Delay in buzzer alarm = 15sec. Delay in accommodation alarm = 15sec. Delay in crew alarm = 90sec. You can also set to show count down(CD) in counting down state or dormant state = 1 or 0 in parameter.
Found the problem to the constant alarm been activated was due to one of the reset unit been activated(short circuit) and causing the unit to permanent reset. Remove the pin 59 - 29 Ext Device which causes the shorting. The watch alarm unit works in a parallel way where either reset unit within the network shorted, all reset unit will be shorted. So looking at the terminal module, 43 - 13, 45 - 15, 47 - 17, 49 - 19, 51 - 21, 53 - 23, 55 - 25, 57 - 27, 59 - 29, 60 - 30 should measure +24Vdc. If no voltage were received, it means one of them must be shorting. How then do you know which one is shorting since all connected in parallel? Removed wire 43, 45, 47, 49, 51, 53, 55, 57, 59, 60 and connect to a temporary terminal block. Measured in ohm to 13, 15, 17, 19, 21, 23, 25, 27, 29, 30 respectively. Means the red probe goes to 43, the black probe goes to 13 in ohm range using a multimeter. After fixing the problem, tested count down of 12 mins, 6 mins and 3 mins working perfectly ok. Also tested the time diagram works as per IMO requirement.
Please see the parameter setting below and time diagram according to IMO requirement.
This type of BNWAS is simple and easy to install and operate. The cost is also reasonable consider the IMO regulation kick in for most of the ship owner to fulfill the IMO regulation requirement. For enquiry, please contact Sperry Marine for quotation
.
Subscribe to:
Posts (Atom)