Connecting OxyGuard Model 420 - Dissolved Oxygen Sensor- to FieldPoint 1601 , FP-AI-110 analog input

[lll]

Hello,

i have OxyGuard Model 420 (Dissolved Oxygen Sensor 4-20 ma)
that i want to connect to my FieldPoint 1601 , FP-AI-110 analog input.
i'm using LabView 7.1

this sensor have 2 wires, and i dont want to make mistakes and destroy the sensor,
how i connect it ,physically to the FP ?
do i need to connect the sensor to the VC in the FP module ?

if someone can post a sketch of the Circuit i will be more than happy.


thanks in advance.
mor

[lll]

Hello,

i have more details :
the Oxyguard Sensor have 2 wires. brown and Blue.

i connect the Brown_wire to COM (channel 0 , number 18 in the FP-AI-110 module)
the Blue_wire connect to Iin (channel 0 , number 2 in the FP-AI-110 module)

i use the LabView Example to read the Channel 0 from my FP-1601
i configure it in my MAX and its look fine.

i run the LabView program, while loop that read from channel 0
and ......... NOTHING !
i get 0.

this in the Sensor:
http://www.oxyguard.dk/products/oxygen_probes/dissolved/model_420/model_420.html

thanks for any support.

[tst]

hello mor
As all 2 wire-current sensors, the Oxyguard Sensor must be connected to the power source = Vsup terminal with the Brown_wire , not to the COM !(channel 0 , number 17 in the FP-AI-110 module)
the Blue_wire u connected OK to Iin (channel 0 , number 2 in the FP-AI-110 module) .
See also in the Connection Example at the end of the link u attached.

We use the same sensor & configuration for a long time in Fishery Control Systems.

I have no explanation wy its look fine in MAX with the old connections .

Hope it help u

Shimon

[lll]

Thanks for your help.

I configure my FieldPoint FP-1601 in MAX to range 0.0035 to 0.021 Amps
and 50 Hz.

when i click the "Start" in MAX i get "Out of range" in the "Status" Column
for all the Channels.

What i'm doing wrong here ?

thanks in advance.

[Sean_C.]

Hello mor,

Have you jumpered the FP power supply to the V and C terminals on the AI-110? Can you measure the current coming from the sensor? Is it within the specified range (4 - 20 mA)?

Regards,
Sean C.

[lll]

Hello Sean,

i need to jumper the V and C from the FP-1601 controller to the FP-AI-110 module ???

No, i didnt do that ......
i just connect the power supply 24volt to the second V.C. in my FP-1601 terminal.

I really need to connect the V.C. in my FP-AI-110 module to the V.C. from the FP-1601 terminal ?

WOW

i'm really confuse now, i dont want to destroy the sensor or the FP-AI-110 module.
i wait for your reply.

thanks for your reply.

mor

[Sean_C.]

Hello Mor,

When you are using a loop powered sensor, it is usually a good idea to provide an external power supply. The sensor you are using requires between 12 and 35 Volts. Your FP power supply should meet that requirement.

Please see Figure 7 in the (c)FP-AI-110 for details on how to connect a loop powered current transducer. You shouldn't damage either the AI-110 or your transducer with this configuration.

Please let me know if this does not work.

Regards,
Sean C.

[lll]

Sean

THANK YOU !

its work perfect.

thank you for your help.

Regards,
mor