Emerson 7003M - Manual (Page 56)

Operator Manual
748223-K
June 2002
4-10 Calibration and Adjustments Rosemount Analytical Inc. A Division of Emerson Process Management
Model 7003M
NOTE
The low calibration point must be be-
tween the initial calibration point (step
1 of previous procedure) and zero, and
the high calibration point must be be-
tween the initial calibration point and
20mA.
If the third point calibrated (step 8,
previous procedure) is actually an-
other low range (between the initial
calibration point and CCL) it will over-
ride the original CCL but won't affect
the initial calibration.
NOTE
The current output linearizing proce-
dure uses second order polynomials to
adjust the output linearity. The correc-
tion effect is maximized at the calibra-
tion point, and is smoothly diminished
towards the endpoints.
d. Test Alarm Relays
1. Disconnect any alarm or ON/OFF-
Control devices that are connected to
the analyzer, before testing.
NOTE
When alarms are tested manually, any
alarm or ON/OFF-Control devices con-
nected to the relays will respond as
they would in an alarm condition. The
alarm devices may have to be discon-
nected from the relays for this test.
2. Toggle the relays ON and OFF using
the ALARM 1 and ALARM 2 keys.
A-1 ON or A-2 OFF is displayed.
The alarm contacts can be heard
opening and closing.
3. Connect any alarm or ON/OFF-
Control devices that were
disconnected in step 1.
4. Press ENTER to exit the
DIAGNOSTICS mode.
"Hld" flashes alternately with the last
oxygen reading and the analyzer
returns to HOLD mode.
5. Press ENTER again to return to RUN
mode.
4-5 ADJUSTMENTS AND SETTINGS
All operator settings and adjustments are
made using the front keypad except if the
power jumpers are to be changed. Refer to
the following sections:
2-5b Power Connections on page 2-4
3-5d Zero Offset Adjustment on page 3-15
4-4a Raw Sensor Voltage on page 4-8
4-4c Linearizing Current Output on page 4-8