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Фрагмент инструкции
The following message is displayed while the analyzer is being purged. . As soon as the CO level falls below 100 ppm, the pump turns off and the analyzer starts its normal 5 second turn-off sequence. To abort the purging process and immediately start the analyzer’s turn-off sequence, press the key. NOTE: Turning the analyzer off initiates a 5-second delay, during which time the unit can be turned on again without any warmup time. You can turn the analyzer back on during this 5-second delay by pressing the key. Instruction 24-9351 PCA Operation 4.4 Differential Pressure Measurement The difference in pressure (.P) between two areas can be measured by using the PCA’s two pressure ports and DRAFT Screen. By using Pressure Port 2 (–) as the reference, the pressure applied to Port 1 (+) will be displayed on the DRAFT Screen as the differential pressure between the two ports. 1. Turn on the analyzer by pressing the key; wait for the warmup cycle to complete; then press the MENU key until the first DRAFT Screen is displayed (refer to Section 4.9). If a TA-SENSOR ERROR is displayed because the probe’s thermocouple is not plugged into the analyzer, then press the key to acknowledge the error before pressing the MENU key. 2. While the first DRAFT Screen is displayed, remove any hoses connected to Pressure Ports 1 and 2; then press the key to zero these ports at atmospheric pressure. 3. Connect two sampling hoses to . Pressure Ports 1 and 2 –. (Figure 4-3). Then place the open . end of each hose into the areas . being measured. 4. The differential pressure between the two areas is now displayed on the third DRAFT Screen. If the pressure at Port 1 is higher than Port 2, then the pressure difference will be positive. But if the pressure at Port #1 is lower, then the pressure difference will be negative. The reading shown in this example indicates that the pressure at Port 1 is 2.25 mb lower than the pressure at Port 2. Pressure Port 1(+) Sampling Hoses with quick- connect fittings are available as an optional accessory. Refer to Section 8.2. Pressure Port 2(–) Reference Figure 4-3. Differential Pressure Hose Connections Instruction 24-9351 Operation PCA 4.5 Warmup Screen . . . Where: xx = Instrument Model Number yy = Counts down from 60 seconds As soon as the key is pressed, the instrument’s serial number and software version number are displayed for approximately 3 seconds. To continuously display these items, hold down the key at start-up. The warmup cycle continues after the key is released. The Warmup Screen is displayed during the analyzer’s 60 second warmup cycle, during which time the “Warmup” value (yy) counts down to zero. After the warmup cycle is complete (and if the unit is working correctly) the instrument will flash and go directly to the Combustion Test Screen (Section 4.7). If there is a problem, however, with one or more of the sensors, the Sensor Status Screen (Section 4.6) is displayed with error message(s) appearing at the bottom of the screen. Front Panel Key Functions: – No Action – No Action – No Action – No Action – No Action – Toggle Backlight ON/OFF* – Turn analyzer OFF* * The button will always turn the backlight on and off, and the key will always turn the analyzer on and off. These two keys will not be mentioned in the remainder of this section. Instruction 24-9351 PCA Operation 4.6 Sensor Status Screen . . . . Where: xx = Instrument Model Number z = Sensor(s) in error If there is problem with one or more of the sensors, the Sensor Status Screen will be displayed after the analyzer has gone through its warmup cycle (refer to Section 7.2 for a listing of the error codes). Front Panel Key Functions: – No Action – No Action – No Action – Go to Combustion Test Screen – No Action Instruction 24-9351 Operation PCA 4.7 Combustion Test Screen PCA models 10–25, 40–55 PCA models 30, 35, 60, & 65 This screen shows: O2 ............... Oxygen content in flue gas (%) C2 ............... Carbon Dioxide content present in flue gas (%) TL ............... Primary/Ambient air temp. (°F) qA ............... Stack Loss CO* ............. Carbon Monoxide content in flue gas (ppm) CU* ............. Carbon Monoxide content referenced to 0% Oxygen (ppm) TA ............... Stack (Flue gas) temperature (°F) LA ............... LAMBDA NX* ............. Nitric Oxide content in flue gas (ppm) NU* ............ Nitric Oxide content referenced to 0% Oxygen (ppm) HLD/RUN .. PCA on hold / PCA running test NG .............. Fuel code for natural gas (see Section 4.8 for other codes) P .................. Print Data S .................. Save Data * For PCA models 30, 35, 60 and 65, you have the option of displaying either CO & NX, or CU & NU. Refer to Section 4.16 for setup instructions. NOTE: Refer to Section 7.3 if stars (****) , dashes (----) , or Xs (XXXX) appear in the display. Front Panel Key Functions: – Move cursor (z) up " # " # $ # $ % # #$ #$ & '# #"& '# #" " # $ # #$ & '# #" - OR...