Instruction Manual

748213-S April 2002

Model 755R

1-5 ALARM OPTION

The alarm option contains:

•An alarm circuit incorporating two com- parator amplifiers, one each for the ALARM 1 and ALARM 2 functions. Each amplifier has associated setpoint and deadband adjustments. Setpoint is ad- justable from 1% to 100% of fullscale. Deadband is adjustable from 1% to 20% of fullscale.

•An alarm relay assembly, containing two single-pole, double-throw relays (one each for the ALARM 1 and ALARM 2

contacts). These relays may be used to drive external, customer-supplied alarm and/or control devices.

1-6 ELECTRICAL OPTIONS

The analyzer is supplied, as ordered, for operation on either 115 VAC, 50/60 Hz or 230 VAC, 50/60 Hz.

1-7 REMOTE RANGE CHANGE OPTION

This option allows the customer to remotely control the recorder scaling. It disables the internal recorder fullscale range select without affecting the front panel display.

1-2 Description and Specifications

Rosemount Analytical Inc. A Division of Emerson Process Management