Emerson Process Management IB106-340 Identifying and Correcting Alarm, Indications

Instruction Manual

IB-106-340 Rev. 2.4 April, 2001

Oxymitter 4000

The logic contact is self-powered, +5 VDC,		2. Additional IMPS 4000 Alarm Contacts.
340 ohm series resistance. An interposing		(a)	One contact per IMPS 4000 for
relay will be required if this contact is to be
utilized to annunciate a higher voltage de-			“low calibration gas flowing”.
vice, such as a light or horn, and may also		(b)	One contact per IMPS 4000 for
be required for certain DCS input cards. A
			“high calibration gas flowing”.
Potter & Brumfield R10S-E1Y1-J1.0K 3.2
mA DC or an equal interposing relay will be			NOTE
mounted where the contact wires terminate
		The 4-20 mA signal can be configured
in the control/relay room.
		to respond normally during any cali-
b. If autocalibration systems are utilized, the		bration, or can be configured to hold
bidirectional logic contact is utilized as a		the last O2 value upon the initiation of
“handshake” signal between the autocali-		calibration. Factory default is for the
bration system (SPS 4000 or IMPS 4000)		4-20 mA signal to operate normally
and is unavailable for alarming purposes.		throughout calibration. Holding the
The following additional contacts are pro-		last O2 value may be useful if several
vided through the autocalibration systems:		probes are being averaged for the
		purpose of automatic control. Unless
1. SPS 4000 and IMPS 4000, 1-4 probes.		several probes are being averaged,
		always place any control loops using
(a)	One contact closure per probe	the O2 signal into manual prior to
	from the control room to the SPS	calibrating.
	4000 or IMPS 4000 for “calibration	7-4 IDENTIFYING AND CORRECTING ALARM
	initiate”.
		INDICATIONS
(b)	One contact output per probe from	Faults in the Oxymitter 4000 are indicated using
	the SPS 4000 or IMPS 4000 to the
		the four diagnostic, or unit, alarms. The pattern
	control room for “in calibration”
		of repeating blinks will define the problem. A
	notification.
		condensed table of the errors and the corre-
(c)	Once contact output per probe	sponding blink codes can be found on the inside
		right cover of the electronics housing. Table 7-1

from the SPS 4000 or IMPS 4000	also identifies the blink code and fault status of
to the control room for “calibration
	each LED as well as the output of the 4-20 mA
failed” notification. (Includes output
	signal line and a fault number that corresponds
from pressure switch indicating “cal
	to the troubleshooting instructions provided in
gas bottles empty”).
	this section.

7-2 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management