Teledyne 3020T operating instructions Contrast Function, Standby Function

4 Operation Model 3020T

output continue to read the true value of the oxygen concen- tration regardless of the analog output range.

4.11 The CONTRAST Function

Contrast Function is DISABLED

(Refer to Section 1.6)

If you cannot read anything on the display after first powering up:

1.Observe LED readout.

a.If LED meter reads all eights and dots, go to step 3.

b.If LED meter displays anything else, go to step 2.

2.Disconnect power to the Analyzer and reconnect again. LED meter should now read all eights and dots.

4.12 The STANDBY Function

In STANDBY, the analyzer’s internal circuits are powered, but there are no displays or outputs from the analyzer.

WARNING: THE POWER CABLE MUST BE UNPLUGGED TO FULLY DISCONNECT POWER FROM THE INSTRU- MENT. WHEN THE ACCESS DOOR IS OPEN AND

THE POWER CABLE IS CONNECTED, EXTRA

CARE IS REQUIRED TO AVOID CONTACT WITH

LIVE ELECTRICAL CIRCUITS.

CAUTION: If you disconnect the primary power source from the analyzer, then on re-energizing, you will be required to choose to keep the configuration you previously programmed into your instrument in the Setup Mode, or it will reset to factory defaults.

Use this function whenever you want to power down without loosing all of the configuration you programmed into your instrument in the Setup

Mode.

4-18 Teledyne Analytical Instruments