Emerson Process Management OXYMITTER 4000 Installed in a safe area, Membrane Keypad

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

Hazardous Area Oxymitter 4000

The HART option is not protected by energy limiting barriers. It must not be interfaced from within the hazardous area. The 4-20 mA cables should be routed and the connections made out- side the hazardous area. Note that this is the case even when using the

HEATER T/C

DIAGNOSTIC HEATER

ALARMS O2 CELL CALIBRATION

CALIBRATION RECOMMENDED

intrinsically safe version of the hand- held communicator.

Do not install an IMPS 4000 or SPS 4000 within the hazardous area. Installing the unit in a potentially explosive environment could cause serious injury or death and equipment damage. Ensure the sequencer is

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

installed in a safe area.

1.Automatic Calibration. Automatic calibrations require no operator action. However, the calibration gases must be permanently piped to the Hazard- ous Area Oxymitter 4000, an SPS

4000 or IMPS 4000 must be installed to sequence the gases, and the logic I/O must be set to mode 8 via HART/AMS so the sequencer and Hazardous Area Oxymitter 4000 can communicate.

Depending on your system setup, an automatic calibration can be initiated by the following methods:

(a)The Hazardous Area Oxymitter 4000’s CALIBRATION RECOM- MENDED alarm signals that a calibration is required.

(b)Use the HART/AMS or the LOI to enter a “time since last cal” (CAL INTRVL) parameter that will initiate an automatic calibration at a scheduled time interval (in hours). To configure the CAL INTRVL parameter, refer to paragraph 7-8for the HART/AMS, or paragraph 6-5for the LOI.

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Figure 9-1. Membrane Keypad

(c)If using an IMPS 4000, enter a time interval via the IMPS 4000 keypad that will initiate an auto- matic calibration at a scheduled time interval (in hours). To set the CalIntvX parameter of the CHANGE PRESETS display mode, refer to the IMPS 4000 Intelligent Multiprobe Test Gas Sequencer Instruction Bulletin for more information.

Once an automatic calibration is initi- ated, by any of the methods previously described, the Hazardous Area Oxy- mitter 4000’s CALIBRATION REC- OMMENDED alarm signals an IMPS 4000 or SPS 4000 to initiate a calibra- tion. The sequencer sends an “in cal” signal to the control room so that any automatic control loops can be placed in manual. Then, the sequencer begins to sequence the calibration gases.

9-2 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management