Operation
Service Menu
3-86
Model 146
i
Instruction Manual
Thermo Fisher Scientific
Note
Changing the flow controller selection may affect allowable limits for
span concentration and total flow. If is advisable to check these settings.
▲
The mass flow controllers are accurate to only
±
2% upon delivery from the
manufacturer. The instrument includes factory-set calibration curves to
improve this accuracy. To achieve an equivalent accuracy when installing
new controllers, see “
Gas Flow Calibration
” later in this chapter.
▲
●
In the Main Menu, choose Service > Flow Control Selection >
Gas.
GAS FLOW CONTROLLER:
CURRENTLY: 25 SCCM
SET TO: 200 SCCM?
©ª
CHANGE VALUE
SAVE VALUE
OPER MODE DIAGS ALARM
The Calibrate Pressure/Temperature screen is used only prior to calibrating
the flow controllers. These values are used to convert from volumetric flow
to standard flow in the flow controller calibration screens. The flow
controllers are calibrated prior to shipment. However, if you need to re-
calibrate the flow controllers, you can use this screen to enter the pressure
and temperature that existed during re-calibration.
Note
When calibrating the flow controller, the pressure and temperature
of the area immediately around the external flow sensor must be entered for
an accurate calibration. The pressure is in millimetres mercury and the
temperature is degrees Celsius.
▲
This adjustment should only be performed by an instrument service
technician.
▲
●
In the Main Menu, choose Service >
Calibration Pres/Temp.
Calibration
Pressure/Temperature
Summary of Contents for 146i
Page 1: ...Model 146i Instruction Manual Dynamic Gas Calibrator Part Number 102482 00 30Jan2008 ...
Page 4: ......
Page 16: ...Contents xii Model 146i Instruction Manual Thermo Fisher Scientific ...
Page 148: ......
Page 188: ...Troubleshooting Service Locations 6 26 Model 146i Instruction Manual Thermo Fisher Scientific ...
Page 258: ...System Description I O Components 8 16 Model 146i Instruction Manual Thermo Fisher Scientific ...
Page 273: ...Thermo Fisher Scientific Model 146i Instruction Manual 9 15 Figure 9 5 Bench Mounting ...
Page 274: ...9 16 Model 146i Instruction Manual Thermo Fisher Scientific Figure 9 6 EIA Rack Mounting ...
Page 275: ...Thermo Fisher Scientific Model 146i Instruction Manual 9 17 Figure 9 7 Retrofit Rack Mounting ...