Symptom

Possible Cause

Method of Correction

Flow indication is not

Attempting to measure

Use higher flow rates

linear and output too

flows below the specified

 

low at lower flows

minimum for the unit

 

 

Moisture or liquid in sensor

Remove moisture and allow

 

 

sensor to dry out

 

Mechanical sensor assembly

Unit must be returned for

 

damaged

repair (see Section J)

 

 

 

Flow reading accuracy

Gas has a specific gravity

Calculate the flow reading

is outside the

other than Air at 20°C

error / offset as explained in

specification

 

section C6

 

Moisture in sensor

Allow sensor to dry out.

 

 

Ensure gas is dry.

 

Mechanical sensor assembly

Unit must be returned for

 

damaged

repair (see Section J)

 

Pressure drop issue

Correct for the pressure

 

 

drop ( ΔP )

Flow indication is fixed

The maximum rated flow for

Reduce the flow

at one value

the unit is being exceeded.

 

 

Output circuits may be

Unit must be returned for

 

damaged

repair (see Section J)

 

 

 

pg. 27 of 29

Page 27
Image 27
Omega Engineering FLR1000 manual Symptom Possible Cause Method of Correction