Teledyne 3000PA Percent Oxygen Analyzer Operation Setting up an Auto-Cal, Password Protection

Percent Oxygen Analyzer Operation 4

4.3.2 Setting up an Auto-Cal

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

Note: If you require highly accurate Auto-Cal timing, use external Auto-Cal control where possible. The internal clock in the Model 3000PA is accurate to 2-3 %. Accordingly, internally scheduled calibrations can vary 2-3 % per day.

To setup an Auto–Calcycle:

Choose System from the Function buttons. The VFD will display five subfunctions.

Contrast Function is DISABLED	Contrast Auto—Cal
(Refer to Section 1.6)	PSWD Logout More

Use < > arrows to blink Auto— Cal, and press Enter. A new screen for Span/Zero set appears.

Span OFF Nxt: 0d 0h

Zero OFF Nxt: 0d 0h

Press < > arrows to blink Span (or Zero), 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.

Span Every 0 d

Start 0 h from now

Use ∆∇ arrows to set an interval value, then use < > arrows to move to the start-time value. Use ∆∇ 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 Span/ Zero screen appears, use the < > arrows to blink the Span (or Zero) OFF/ ON field. Use ∆∇ arrows to set the OFF/ON field to ON. You can now turn these fields ON because there is a nonzero span interval defined.

4.3.3 Password Protection

If a password is assigned, then setting the following system parameters can be done only after the password is entered: span and zero settings, alarm setpoints, analysis range definitions, switching between autoranging and manual override, setting up an auto-cal, and assigning a new password. However, the instrument can still be used for analysis or for initiating a self- test without entering the password.

Teledyne Analytical Instruments 4-5