Emerson 4500 manual Set Switches, LCD Switches LOI Switches

Reference Manual

00809-0100-4027, Rev AA December 2005

Rosemount 4500

	NOTE
	Sensor burst pressure limits may be less than clamp pressure limits.
	NOTE
	Most transmitters are calibrated in the vertical position. Mounting the
	transmitter in any other position will shift the zero point to the equivalent
	amount of liquid head caused by the varied mounting position. To reset zero
	point, refer to “Sensor Trim” on page 4-5.
Set Switches
	Security (Write Protect)
	Changes can be prevented to the transmitter configuration data with the write
	protection switches on the optional LCD or the switches on the optional LOI
	board. Position the switch in the “ON” position to prevent change of
	configuration data.
	If the transmitter write protection switch is in the “ON” position, the transmitter
	will not accept any “writes” to its memory. Configuration changes, such as
	digital trim and reranging, cannot take place when the transmitter security is
	on.
	To reposition the switches, follow the procedure described below.
	1. If the transmitter is installed, set the loop to manual and remove power.
	2. Remove the electronics compartment cover.
	3. Follow the procedure in Figure 2-4to reposition the switches as desired
	for the specific housing compartment.
	4. Re-install the transmitter cover.

Figure 2-4. Switch configuration

LCD Switches LOI Switches

Security

Alarm

4500_26_AA

Slide the security and alarm switches into the preferred position by using a small screwdriver.

ALARM	SECURITY
SPAN	ZERO

AlarmSecurity

-LOOP

+LOOP

Slide the security and alarm switches into the preferred position by using a small screwdriver.

NOTE

If alarm and security adjustments are not installed, the transmitter will operate normally with the default condition alarm high and the security off.

2-5