Emerson Process Management OXYMITTER 4000 Alarm Contacts, Identifying and Correcting Alarm

Hazardous Area Oxymitter 4000

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

8-4 ALARM CONTACTS	2. Additional IMPS 4000 Alarm Contacts.
a. If autocalibration is not utilized, a common	(a)	One contact per IMPS 4000 for
bi-directional logic contact is provided for		“low calibration gas flowing”.
any of the diagnostic alarms listed in Table
8-1.The assignment of alarms which can	(b)	One contact per IMPS 4000 for
actuate this contact can be modified to one		“high calibration gas flowing”.

of seven additional groupings (mode 0
through mode 7) listed in Table 7-1.		NOTE
The logic contact is self-powered, +5 VDC,		The 4-20 mA signal can be configured
with a 340 ohm series resistance. An inter-		to respond normally during any cali-
posing relay will be required if this contact is		bration, or can be configured to hold
to be utilized to annunciate a higher voltage		the last O2 value upon the initiation of
device, such as a light or horn. An inter-		calibration. Factory default is for the
posing relay may also be required for cer-		4-20 mA signal to operate normally
tain DCS input cards.		throughout calibration.
A Potter & Brumfield R10S-E1Y1-J1.0K 3.2		NOTE
mA DC or an equal interposing relay will be		Holding the last O2 value may be useful
mounted where the contact wires terminate
in the control/relay room.		if several probes are being averaged
		for the purpose of automatic control.
b. If autocalibration systems are utilized, the		Unless several probes are being aver-
bi-directional logic contact is utilized as a		aged, always place any control loops
“hand-shake” signal between the autocali-		using the O2 signal into manual prior to
bration system (SPS 4000 or IMPS 4000)		calibrating.
and is unavailable for alarming purposes.
The following additional contacts are pro-		8-5 IDENTIFYING AND CORRECTING ALARM
vided through the autocalibration systems:
1. SPS 4000 and IMPS 4000, 1-4 probes.		INDICATIONS
(a)	One contact closure per probe	For a Hazardous Area Oxymitter 4000 with a
		membrane keypad, faults are indicated by four
	from the control room to the SPS
		diagnostic, or unit, alarm LEDs. A pattern of
	4000 or IMPS 4000 for “calibration
		repeating blinks define the problem. A con-
	initiate”.
		densed table of the errors and the correspond-
(b)	One contact output per probe from	ing blink codes can be found on the inside right
		cover of the electronics housing. Table 8-1also
	the SPS 4000 or IMPS 4000 to the	identifies the blink code and fault status of each
	control room for “in calibration”	LED as well as the output of the 4-20 mA signal
	notification.	line and a fault number that corresponds to the	8
(c) One contact output per probe from		troubleshooting instructions provided in this
		section.
	the SPS 4000 or IMPS 4000 to the
	control room for “calibration failed”	For a Hazardous Area Oxymitter 4000 with the
	notification. (Includes output from	optional LOI, alarm messages are displayed on
	pressure switch indicating “cal gas	the LOI display window when the alarm status
	bottles empty”).	display is accessed via the LOI menu. A listing

of the alarm/fault messages and the related fault status descriptions and fault numbers are shown in Table 8-2.

Rosemount Analytical Inc. A Division of Emerson Process Management Troubleshooting 8-3