Analytical Technology A15 Especificaciones descargar pdf (Pagina 24)

ATI A15/66 Residual Sulfite Monitor

O&M Manual

Rev-W (8/10)

9. TEMPERATURE: ON Factory setting. No adjustment should be made. Press ENTER to go to the

next display.

10. CAL TC: 0.00%/C Factory setting. No adjustment should be made. Press ENTER to go to the

next display.

11. CAL OUT1: 4-20 mA This routine allows programming of the analog output signal. Either a 4-20 or

0-20 mA output may be selected by using the UP key. The default is 4-20 mA. If a zero based

voltage output is required, the 0-20 mA output may be used in conjunction with a shunt resistor

across the connection terminals on the back of the instrument. Once a selection is made, press

ENTER.

12. CAL P1: 0.00 This routine allows selection of the low end of the analog output range. The default

is 0.00 and should normally be left unchanged. However, the output can be adjusted to a non-zero

based range (such as 1-5 PPM) if desired. If a non-zero based output is desired, use the UP key to

set the new 4 mA output value. When selection is made, press ENTER.

13. CAL P2: 20.00 This routine allows selection of the full scale analog output range. The default is

20.00 PPM (or 2.000 PPM if the low range is selected in #3 above). Use the UP or DOWN keys to

set the concentration to be represented by a 20 mA output value. When selection is made, press

ENTER.

14. SET A ACT: ON/OFF This routine allows selection of the mode of operation for relay A. The default

is simple on/off operation. This relay can also be configured for pulse frequency (PFM) or pulse width

(PWM) modulation for control of chemical feed equipment.

15. SET A F.: LO (OR HI) This routine allows the function of setpoint A to be defined as either low or

high. When LO is selected, relay A acts like a low alarm, with the relay activating when the measured

concentration is below the setpoint. When HI is selected, the relay acts like a high alarm, activating

when sulfite is above the setpoint. Setpoints are programmed in another routine described later in

this manual.

16. SET B ACT: ON/OFF This routine allows selection of the mode of operation for relay B. The default

is simple on/off operation. This relay can also be configured for pulse frequency (PFM) or pulse width

(PWM) modulation for control of chemical feed equipment.

17. SET B F.: LO (OR HI) This routine allows the function of setpoint B to be defined as either low or

high similar to relay A described in 13 above.

18. CAL CF: DISABLED This function allows the user to activate an automatic cleaning fuction in the

monitor. The cleaning function is explained in greater detail later in this manual. Use the UP or

DOWN keys to select AUTO or MANUAL modes of cleaning. Leave this setting at DISABLED if no

automated cleaning is anticipated.

19. CLEANING T: 3.0’ This routine allows adjustment of the time period in which cleaning chemicals

can be injected into the sampling system. The default is 3 minutes and the range of adjustment is

from 0.1 to 20 minutes.

20. INHIBIT T: 4.0’ During the cleaning cycle specified above, the air pump is inhibited so that chlorine

from cleaning chemicals is not sparged across the sensor. The inhibit time should normally be

between 1.0 and 2.0 minutes longer than the cleaning time to allow cleaning chemicals to clear out of

the sample chamber before the sample pump is reactivated. The default is 4 minutes and the range

of adjustment is from 0.1 to 20 minutes.

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