Оценок - 4, средний балл: 3.8
(
)
)
|
Фрагмент инструкции
key. Select the tag of the desired reference channel with the ^ or v keys and then press the . or > key. The display will re turn to the previous menu automatically and the selected reference channel will be displayed in the “Source module:” line. Choose signal Select the “Signals” submenu by selecting the “Choose signal…” line and pressing the . key. Note: the parameters “Operation status” and “Validity” are not functional on the TO2. The list of signals will depend on the module chosen. TO2 37.50 ppm -- Signals - Sensor temp Temp current Sensor current Sample flow Range Electrolyte level Operation status Validity Measure Back… <<< >>> TO2 -- Signals -37.50 ppm Primary variable Pr Measure Back… <<< >>> Press the F5 key to go to a further menu to choose the Primary Variable signal for the analog output. The Primary Variable is the actual oxygen concentration. The signal chosen here will be applied to the analog output (1-8) chosen above. 3-26 Operation Rosemount Analytical Inc. A Division of Emerson Process Management Instruction Manual 760008-A Model NGA 2000 TO2 September 2001 Signal value for 0% (100%) output TO2 37.50 ppm -- Analog Output Setup -Output number: 1 Choose signal source module… Choose signal… Signal value for 0% output: 0.00 Signal value for 100% output: 100.00 Output current: 0…20 mA Hold output during calibration: No Signal name: Sample flow Current signal value: 8.60 Source module: TO2 Measure Back… More… It is possible to set the signal value for 0% output and for 100% output so as to output only a portion of the entire range. Example: Range from 0 to 1000 ppm 0% value to be 400 ppm, 100% value to be 700 ppm. Analog output normally: 0V = 0 ppm, 10v = 1000 ppm After changing the output scaling: 0V = 400 ppm, 10V = 700 ppm Change to the “Signal value for 0% output:” line and adjust the value to 400. Then change to the “Signal value for 100% output:” line and adjust the value to 700. NOTE: If the measurement range is changed, the settings done in this menu will revert back to the standard values of the range. The output values can bechanged permanently in the menu“Begin and End of Ranges.” See section 0. NOTE: The signal range of the analog outputshould not be less than the smallest range of the channel. Otherwise the analog output may exhibit excessivenoise. Output current TO2 37.50 ppm -- Analog Output Setup -Output number: 1 Choose signal source module… Choose signal… Signal value for 0% output: 0.00 Signal value for 100% output: 100.00 Output current: 0…20 mA Hold output during calibration: No Signal name: Sample flow Current signal value: 8.60 Source module: TO2 Measure Back… More… Select the desired output range in the “Output current:” line. The options are 0…20 mA or 4…20 mA. Hold output during calibration TO2 37.50 ppm -- Analog Output Setup -Output number: 1 Choose signal source module… Choose signal… Signal value for 0% output: 0.00 Signal value for 100% output: 100.00 Output current: 0…20 mA Hold output during calibration: No Signal name: Sample flow Current signal value: 8.60 Source module: TO2 Measure Back… More… Enable this option to hold the analog output to the last value during calibration. Pressing the F5 (More…) key changes to the submenus “Output Signal if Assigned Module Fails” and “Fine Adjustment.” Rosemount Analytical Inc. A Division of Emerson Process Management Operation 3-27 Instruction Manual 760008-A September 2001 Model NGA 2000 TO2 Output(s) value on analyzerNormal: The absolute measurement sigfailure nal will be sent to the analog output. TO2 37.50 ppm -- Output Signal if Assigned Module Fails -Output( s) value on analyzer failure: BeginOfRange 10% Output number: -- Fine Adjustment – 1 Operation mode: Normal Fine adjustment for 0% output: 4096 Fine adjustment for 100% output: 819 Measure Back… More… Choose the desired signal level to cause a failure condition. The choices are: Actual BeginOfRange EndOfRange BeginOfRange-10% BeginOfRange+10% Output number TO2 37.50 ppm -- Output Signal if Assigned Module Fails -Output( s) value on analyzer failure: BeginOfRange – 10% -- Fine Adjustment – Output number: Operation mode: 1 Normal Fine adjustment for 0% output: 4096 Fine adjustment for 100% output: 819 Measure Back… More… Choose the output number (1-8) for setting the fine adjustment. Operation mode TO2 37.50 ppm -- Output Signal if Assigned Module Fails -Output( s) value on analyzer failure: BeginOfRange – 10% -- Fine Adjustment – Output number: Operation mode: Fine adjustment for 0% output: 1 Normal 4096 Fine adjustment for 100% output: 819 Measure Back… More… Adjust 0V: Used to set the display equal to the analog output for 0V and 0 mA. Life zero signals (4-20 mA and 2-10V) are set automatically and cannot be adjusted. Adjust 10V: Used to set the display equal to the analog output for 10V and 20 mA. Select the “Fine adjustment for 0% output” and/or “Fine adjustment for 100% output” lines with the . or > key. Adjust to the desired value with the ^ or v key and...