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Photometric Analyzer Operation /Control Unit 3
Part I 3-5
Teledyne Analytical Instruments
Note: Before setting up an AUTO-CAL, be sure you understand the Zero
and Span functions as described in section 4.4, and follow the
precautions given there.
Note: If you require highly accurate AUTO-CAL timing, use external
AUTO-CAL control where possible. The internal clock in the
Model 5000BF is accurate to 2-3 %. Accordingly, internally
scheduled calibrations can vary 2-3 % per day.
To setup an Auto–Cal cycle:
Choose System from the Function buttons. TheVFD will display five
subfunctions.
DIG_FILT SELF—TEST
PWD LOGOUT MORE
Select MORE and press the Enter Key
AUTOCAL FILSOL HOLD
CAL-HOLD-TIMER MORE
Use < > arrows to blink AUTO—CAL, and press Enter. A new screen
for ZERO/SPAN set appears.
ZERO in Ød Øh off
SPAN in Ød Øh off
Press < > arrows to blink ZERO (or SPAN), then press Enter again.
(You won’t be able to set OFF to ON if a zero interval is entered.) A Span
Every ... (or Zero Every ...) screen appears.
Zero schedule: OFF
Day: Ød Hour: Øh
Use DÑ arrows to set an interval value, then use < > arrows to move to
the start-time value. Use DÑ arrows to set a start-time value.
To turn ON the SPAN and/or ZERO cycles (to activate AUTO–CAL):
Press System again, choose AUTO–CAL, and press Enter again. When the
ZERO/SPAN values screen appears, use the < > arrows to blink the ZERO
(or SPAN) and press Enter to go to the next screen. Use < > to select OFF/
ON field. Use DÑ arrows to set the OFF/ON field to ON. You can now turn
these fields ON because there is a nonzero span interval defined.
If instrument is turned off, the next time the instrument is powered, the
instrument will automatically perform a calibration cycle after 3 minutes of
entering the sample mode if AUTOCAL functions were on prior to shut
down.