Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

8-4 ALARM CONTACTS

2. Additional IMPS 4000 Alarm Contacts.

a. If autocalibration is not utilized, a common bi-

(a)

One contact per IMPS 4000 for

directional logic contact is provided for any of

 

“low calibration gas flowing”.

the diagnostic alarms listed in Table 8-1.The

(b)

One contact per IMPS 4000 for

assignment of alarms that actuate this contact

can be modified to one of seven additional

 

“high calibration gas flowing”.

groupings (mode 1 through mode 7) listed in

NOTE

Table 7-1.

The logic contact is self-powered, +5 VDC,

The 4-20 mA signal can be configured

to respond normally during any cali-

340 ohm series resistance. An interposing

bration, or can be configured to hold

relay will be required if this contact is to be

the last O2 value upon the initiation of

utilized to annunciate a higher voltage de-

calibration. Factory default is for the

vice, such as a light or horn, and may also

4-20 mA signal to operate normally

be required for certain DCS input cards. A

throughout calibration.

Potter & Brumfield R10S-E1Y1-J1.0K 3.2

 

mA DC or an equal interposing relay will be

NOTE

mounted where the contact wires terminate

Holding the last O2 value may be use-

in the control/relay room.

 

 

ful if several probes are being aver-

b. If autocalibration systems are utilized, the

aged for the purpose of automatic

control. Unless several probes are

bidirectional logic contact is utilized as a

being averaged, always place any con-

“handshake” signal between the autocalibra-

trol loops using the O2 signal into

tion system (SPS 4000 or IMPS 4000) and is

manual prior to calibrating.

unavailable for alarming purposes. The fol-

lowing additional contacts are provided

8-5 IDENTIFYING AND CORRECTING ALARM

through the autocalibration systems:

1. SPS 4000 and IMPS 4000, 1-4 probes.

INDICATIONS WITH MEMBRANE KEYPAD

Faults in the Oxymitter 4000 are indicated using

 

 

(a)

One contact closure per probe

the four diagnostic, or unit, alarms, Figure 8-2.

 

from the control room to the SPS

The pattern of repeating blinks will define the

 

4000 or IMPS 4000 for “calibration

problem. A condensed table of the errors and

 

initiate”.

the corresponding blink codes can be found on

 

 

the inside right cover of the electronics housing.

(b)

One contact output per probe from

Table 8-1identifies the blink code and fault

status of each LED as well as the output of the

 

the SPS 4000 or IMPS 4000 to the

 

4-20 mA signal line and a fault number that cor-

 

 

(c) control room for “in calibration”

responds to the troubleshooting instructions

provided in this section.

 

notification.

 

 

(d)

Once contact output per probe

For an Oxymitter 4000 with the optional LOI,

alarm messages are displayed on the LOI dis-

 

from the SPS 4000 or IMPS 4000

to the control room for “calibration

play window when the alarm status display is

accessed via the LOI menu. A listing of the

failed” notification. (Includes output

alarm/fault messages and the related fault

from pressure switch indicating “cal

status descriptions and fault numbers are

gas bottles empty”).

shown in Table 8-2.

 

Rosemount Analytical Inc. A Division of Emerson Process Management

Troubleshooting 8-3

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Emerson 4000 manual Alarm Contacts, Identifying and Correcting Alarm, Indications with Membrane Keypad
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4000 specifications

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