Ecotech Serinus 44 User Manual

Serinus 44 User Manual 3.0
Page 106
Procedure
1. Open - Main Menu  Calibration Menu.
2. Note down the current value for Conv. Efficiency NH3.
3. Edit - Conv. Efficiency NH3 - (change to 100%) - Accept.
4. Supply the instrument with a known concentration of NH
3
span gas at roughly 80% of the full-
scale monitoring range of the particular instrument. Label this value as [NH
3
]
SUPPLIED
.
5. Allow the instrument to achieve a prolonged, stable measurement response and note down the
NH
3
reading as shown on the instrument. Label this measurement as [NH
3
]
MEASURED
.
6. Use the noted measurements to calculate the converter efficiency using Equation 6.
7. If the converter efficiency is 80% or greater, the converter is working well, return the converter
efficiency to the original value. Adjustments to the converter efficiency value should only be
made based on a multipoint check (refer to Section 5.8.2). If the converter efficiency is outside of
this range, the test has failed and a multipoint converter efficiency adjustment should be
performed.
5.8.2 Multipoint NH
3
Converter Efficiency Adjustment
A multipoint converter efficiency check is performed to determine the actual converter efficiency
across the range of the instrument. Thus allowing the user to calculate a new converter efficiency
value that can be adjusted in the instrument.
In the S44, the Conv. Efficiency NH3 value displayed in the Main Menu  Service Menu 
Calculation Factors Menu encompasses losses from the external converter, the in-line NH
3
scrubber
and the second NO
2
to NO converter coil.
Note: For the following, the results for the NO and NO
2
and NO
X
channels can be ignored.
Equipment Required
 Gas Dilution Calibrator (such as a Serinus Cal 1000/2000/3000).
 NH
3
gas cylinder reference standard.
 Zero Air Generator.
Procedure
1. Open - Main Menu  Calibration Menu.
2. Note down the current value for Conv. Efficiency NH3.
3. Edit - Conv. Efficiency NH3 - (change to 100%) - Accept.
4. Supply the instrument with zero air from your gas dilution calibrator.
5. Allow the instrument to achieve a prolonged, stable measurement response and note down the
NH
3
value for reference only. If you get greater than 3 to 5 ppb you need to troubleshoot the
instrument and calibration system before continuing with this procedure.
6. Supply the instrument with a known concentration of NH
3
span gas at roughly 80% of the full-
scale monitoring range of the particular instrument. Label this value as [NH
3
]
SUPPLIED
.

Ecotech Serinus 44 Specifications

General

Brand	Ecotech
Model	Serinus 44
Category	Measuring Instruments
Language	English