Teledyne manual Setting up an AUTO-CAL, Operation, Model 7300A, Teledyne Analytical Instruments

4 Operation Model 7300A

If you do not wish to continue a function, you can abort the session by escaping . Escaping a function takes the analyzer back to the previous screen, or to the ANALYZE Function, depending on the function escaped.

reproduced, at the appropriate point in the procedure, in a Mono- spaced type style. Push-button names are printed in Oblique type.

4.3.2 Setting up an AUTO-CAL

When proper automatic valving is connected (see chapter 3, installation), the Analyzer can cycle itself through a sequence of steps that automatically zero and span the instrument.

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 7300A is accurate to 2-3 %. Accordingly, internally scheduled calibrations can vary 2-3 % per day.

Note: If your ranges are configured for different applications, then AUTO-CAL will calibrate all of the ranges simultaneously (by calibrating the Cal Range).

To setup an AUTO-CALcycle:

TheVFDwilldisplayfivesubfunctions.

Call out MAIN MENU, scroll to AUTO-CAL function, and ENTER. A new screen for ZERO/SPAN set appears.

ZERO	in	Ød	Øh	off
SPAN	in	Ød	Øh	off

Use UP or DOWN key to blink ZERO (or SPAN), then Enter. (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 UP or DOWN key to set a value in days, then ENTER to move to the start-time value in hours. Use UP or DOWN keys to set a start-time value, then

ENTER.

To turn ON the SPAN and/or ZERO cycles (to activate AUTO–CAL): useUP or DOWN keys to set the OFF/ON field to ON. You can now turn these fields ON because there is a nonzero span time defined.

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