Emerson IM-106-5500 Manual Do Utilizador

IM-106-5500, Original Issue
August 2005

4-13

CCO 5500

Select the required span using the ARROW 
keys for each digit. The ENTER key is pressed 
to enter the value of each digit. The units will 
be displayed in ppm, mg/m

3

 or mg/Nm

3

, 

depending on what has been selected beforehand. The current value will be 
displayed for 1 second when this option is entered. The display then defaults 
to zero; the span value must be re-entered for the unit to function correctly. 

Should a fault condition occur, the current 
output of the instrument may be set to one of 
the following options: 

1. Set the output at 0 mA - ZERO.

2. Adjust the output to the calculated gas concentration even though 

a fault condition exists - MEAS.

3. Hold the last calculated gas concentration - HOLD.

4. Set the output to full scale (20 mA) - F.S.

One of these options can be selected by pressing the ARROW keys; when 
the desired option is displayed press the ENTER key. 

NOTE
This is set at the factory and should not be altered without due consideration. 

From this option the current levels of the analog 
output are set up. Press the ENTER key to 
select it and the operator is prompted to set the 
current levels at 0 to 20 mA. 

When this is displayed, the current output should be set to 0mA as measured 
with a calibrated current meter across the analog current loop terminals. 
Nothing else should be connected to these terminals when the output is being 
set up. The value is adjusted using the two arrow keys; the UP arrow will take 
the current output up and the DOWN arrow will take it down. Press the 
ENTER key when the correct output current is displayed on the ammeter. 

NOTE
Zero mA should be set up no matter what has been selected as the base of 
the current output. This is factory set by Rosemount Analytical. 

6. In a similar manner to above, the current 

output level should now be set to 20 mA.