Instruction Manual

Instruction Manual
748213-S
April 2002
1-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
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 op-
eration 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.