Instruction manual

Getting Started

continued

RFT9739 Field-Mount Transmitter Instruction Manual

Output Wiring Startup TroubleshootingBefore You Begin Getting Started Mounting

Power-Supply and

Sensor Wiring

2.3 Switch settings

Switches 1 through 10 on the electronics module control the following

transmitter functions:

• Baud rate

• Stop bits and parity

• Data bits, communication protocol, and physical layer

• mA outputs

• Zeroing method

• Write-protection of transmitter configuration

Switches 1 through 10 are illustrated in

Figure 2-2

, and described in the

following sections. Normally, switch settings do not require adjustment.

Security modes

Switches 1, 2, and 3 are security switches, which enable the user to

disable flowmeter zeroing, disable resetting of totalizers, and write-

protect all configuration and calibration parameters.

Switch settings enable any of eight possible security modes. Different

modes determine which functions are disabled and whether

configuration and calibration parameters are write-protected. The

following functions can be disabled:

• Flowmeter zeroing using digital communications

• Flowmeter zeroing using the zero button and, if the transmitter has a

display, the Scroll and Reset knobs

• Totalizer reset, with flow, using digital communications

• Totalizer reset, with flow, using the Scroll and Reset knobs, if the

transmitter has a display

• Totalizer control, with zero flow, using digital communications

• Totalizer control, with zero flow, using the Scroll and Reset knobs, if the

transmitter has a display

• Ability to change configuration or calibration factors

Table 2-1

lists the parameters that are write-protected and functions that

are disabled for each security mode. Security modes 1 through 7 are

entered immediately when switches 1 through 3 are set.

For information about security mode 8, see pages 6 through 8.

Figure 2-2. Switches

Switches 1 through 10 at left

are shown in the OFF position.