GLI International P53, Руководство по эксплуатации

Страница: 7 / 97

Rev. 6-501 Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN) 7
CONDENSED OPERATING INSTRUCTIONS
D. CALIBRATING THE ANALYZER -- (continued)
6. With the “2 POINT BUFFER” line selected, press
ENTER key
to display .
7. Press
ENTER key
to “hold” the analog outputs and relays at their present states during
calibration. (Outputs can also be transferred to preset values or allowed to remain active.)
8. With the sensor in the first buffer and the screen displayed, press
ENTER key to confirm. While the screen is displayed, the analyzer
waits for the pH and temperature signals to stabilize, measures the buffer value, and
automatically calibrates this point. Thereafter, a screen like appears
for 5 seconds to confirm calibration of this point.
NOTE: Any time the “PLEASE WAIT” screen appears during calibration, you can
manually complete calibration of the point by pressing the
ENTER key . How-
ever, this is not recommended because the pH and temperature signals may
not be fully stabilized, resulting in a less accurate calibration.
9. After the screen appears, remove the sensor from the first buffer,
rinse it with clean water, and immerse it in the second buffer (typically pH 4). Then
press
ENTER key to confirm this.
10. While the screen is displayed, the analyzer waits for the pH and
temperature signals to stabilize, measures the buffer value, and automatically cali-
brates this point. Thereafter, a screen like appears for 5 seconds to
confirm calibration of this point.
11. A “pH SLOPE XX.X mV/pH” screen appears, indicating a slope value to measure sen-
sor performance. The slope should be 54-62 mV/pH for optimal performance.
12. Press
ENTER key
to end calibration (“2 POINT BUFFER: CONFIRM CAL OK?” screen
appears).
13. Re-install the sensor into the process.
14. Press
ENTER key
to display the active measurement reading on the “2 POINT
BUFFER: CONFIRM ACTIVE?” output status screen. When the reading corresponds
to the actual typical process value, press
ENTER key again to return the analog out-
puts and relays to their active states (MEASURE screen appears).
This completes “2 POINT BUFFER” calibration. The analyzer is now ready to measure pH.
E. COMPLETING ANALYZER CONFIGURATION
To further configure the analyzer to your application requirements, use the appropriate
CONFIGURE screens to make selections and “key in” values. Refer to PART THREE, Sec-
tion 4 for complete configuration details.