Teledyne 7300A manual Adjst output to 4ma ENT to OK

Infrared Gas Analyzer Operation 4

Adjst output to 4ma

<ENT> to OK: -7

Use the Up or Down key to adjust the number on the VFD display. The range of this number is from –255 to 255. As this number changes, so should the reading of the ammeter. Adjust this number until the reading of the ammeter is, as close as possible, 4.00 madc. Press the enter to continue to the 20 madc adjust- ment:

Adjst output to 20ma

<ENT> to OK: 5

Again, Use the Up or Down key to adjust this number until the ammeter reads, as close as possible, 20.0 madc. Press the Enter key to continue to the NAMUR option.

NAMUR NE43 output?

<ENT> to OK: NO

The default setting is NO. That means the 4 to 20 madc (and 0-1 vdc) are linear and show no discontinuities throughout its range of operation, approxi- mately from 2.4 madc to 21.6 madc. If you switch it to YES by using Up or Down keys, the output of the 4 to 20 madc will conform to NAMUR standard NE43. If selected, the output of the 2 to 20 madc will exhibit a breakdown at readings below 3.8 madc and above 20.5 madc approximately. These break- downs, indicate a failure on the analyzer. Please refer to the NAMUR NE43 standard for detailed information.

All the settings of this function are stored and are remembered after power loss. If instrument is cold started (returned to factory settings) the settings will be returned to 0 and non-NAMUR NE43 compliant.

NOTE: Analog 0-1 vdc output does not get calibrated when 4 to 20 madc is adjusted, due to errors introduced by its own electronics.

Teledyne Analytical Instruments 4-15