Emerson 5081-T instruction manual 9URU, Temp Slope, Output Cal, Procedure

MODEL 5081-T	SECTION 6.0
	START-UP AND CALIBRATION

6.2.5 Temp Slope

1.Press NEXT to enter the tEMP SLOPE menu.

The correct temperature slope must be entered into the transmitter to ensure an acceptable process variable measure- ment under fluctuating process temperature conditions. Enter the slope in measured conductivity units per degree tem- perature change using the IRC’s arrow keys. Press ENTER to enter the slope into memory; then press EXIT to return to the main screen.

2.If the temperature slope of the process is not known but you wish to approximate it, refer to the following guide and press ENTER to proceed on to tEMP SLOPE sub-menu with flashing prompt. Utilize the IRC editing keys to generate the desired slope value. Press ENTER then EXIT to return to the main screen.

Acids: 1.0 to 1.6% per °C

Bases: 1.8 to 2.2% per °C

Salts: 2.2 to 3.0% per °C

Water: 2.0% per °C

6.2.6 Output Cal

Although the transmitter outputs are calibrated at the factory, they can be trimmed in the field to match the reading from a standard current meter. Both the 4 mA and the 20 mA outputs can be trimmed. During output calibration the transmitter is in Hold. The output current will go to the value programmed in Section 7.2.

FIGURE 6-2. Current Output Calibration

PROCEDURE

CALIBRATE

9>UR>U!/-[

EXIT NEXT ENTER

CALIBRATE
/VS
		&	c"""
EXIT	NEXT		ENTER
CALIBRATE
/VS
		$	"c""
EXIT	NEXT		ENTER

1.Wire an accurate milliammeter as shown in Figure 6-2.

2.Press CAL on the remote controller.

3.Press NEXT until the OUtPUt CAL submenu appears. Press ENTER.

4.Use the arrow keys to change the display to match the reading from the mil- liammeter. Press ENTER.

5.Use the arrow keys to change the display to match the reading from the mil- liammeter. Press ENTER. Press RESET to return to the main display.

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