Emerson Process Management IB106-340 instruction manual Recommended Configuration, Calibration

	Instruction Manual
Oxymitter 4000	IB-106-340 Rev. 2.4
	April, 2001

	HEATER T/C
DIAGNOSTIC	HEATER	SW2
ALARMS	O2 CELL	ON
	CALIBRATION

CALIBRATION RECOMMENDED

HEATER T/C

HEATER

O2 CELL

CALIBRATION

TEST

POINTS

INC INC

HIGH LOW

GAS GAS

DEC DEC

O2 CELL mV +

O2 CELL mv - HEATER T/C + HEATER T/C -

CAL

TEST GAS +

PROCESS -

% O2

TP1 TP2 TP3 TP4

TP5 TP6

J1 RED YEL GRN ORG

1 2 3 4 1 2 3 4

LIGHTING SEQUENCE DURING NORMAL OPERATION

HEATER T/C

HEATER

O2 CELL

CALIBRATION

1	2	3	4	1	2	3	4
	LIGHTING SEQUENCE DURING WARM-UP

22220056

3

Figure 3-3. Startup and Normal Operation
3-3 RECOMMENDED CONFIGURATION	necessary calibrations based on calendar
	days or weeks since previous calibration.
a. 4-20 mA Signal Upon Critical Alarm	When utilizing the SPS 4000 or the IMPS
	4000, consider wiring some or all associ-
Rosemount recommends that the factory	ated alarm contacts.

default be utilized. The 4-20 mA signal will	1.	CALIBRATION INITIATE. Contact
go to the 3.8 mA level upon any critical
alarm which will cause the O2 reading to be		from the control room to an SPS 4000
unusable. Customer can also select 22 mA		or IMPS 4000 (one per probe) provides
as the failure setting if normal operations		the ability to manually initiate a calibra-
cause O2 readings to go below the zero %		tion at any time from the control room.
O2 (4 mA) level.		Note that calibrations can also be initi-
		ated from a HART handheld communi-
If the O2 measurement is being utilized as		cator, from Asset Management
part of an automatic control loop, the loop		Solutions software, or from the keypad
should be placed into manual upon this fail-		on the Oxymitter 4000.
ure event or other appropriate action should	2.	IN CALIBRATION. One contact per
be taken.
		probe provides notification to the con-
b. Calibration		trol room that the “calibration recom-
		mended” diagnostic has initiated an
Rosemount recommends utilizing an auto-		automatic calibration through the SPS
calibration system, actuated by the “calibra-		4000 or IMPS 4000. If the O2 signal is
tion recommended” diagnostic. New O2		being utilized in an automatic control
cells may operate for more than a year, but		loop, this contact should be utilized to
older cells may require recalibration every		place the control loop into manual dur-
few weeks as they near the end of their life.		ing calibration.

This strategy ensures that the O2 reading is always accurate, and eliminates many un-

Rosemount Analytical Inc. A Division of Emerson Process Management Startup 3-5