Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 31)

<2. Specifications>
2-13
IM 11M12A01-02E 8th Edition : Jan.13,2012-00
Equipment Related Items: Measuring gas selection
Output Related Items: Analog output/output mode selection, output conditions when warming-
up/maintenance/calibrating (during blow back)/abnormal, 4 mA/20 mA
point oxygen concentration (vol% O
2
), time constant.
Alarm Related Items: Oxygen concentration high alarm/high-high alarm limit values (vol% O
2
),
oxygen concentration low alarm/low-low alarm limit values (vol% O
2
),
oxygen concentration alarm hysteresis (vol% O
2
), oxygen concentration
alarm detection, alarm delay (seconds)
Contact Related Items: Selection of contact input 1 and 2, selection of contact output 1 to 4
(abnormal, high-high alarm, high alarm, low alarm, low-low alarm,
maintenance, calibrating, range switching, warming-up, calibration gas
pressure decrease, temperature high alarm, blow back, flameout gas
detection, calibration coefficient alarm, stubilization timeout)
Converter Output: Two points mA analog output (4 to 20 mA DC (maximum load resistance
of 550 Ω)) and one mA digital output point (HART) (minimum load
resistance of 250 Ω).
Range: Any setting between 0 to 5 through 0 to 100 vol% O
2
in 1 vol% O
2
, or
partial range is available (Maximum range value/minimum range
value 1.3 or more).For the log output, the minimum range value is fixed
at 0.1 vol% O
2
.
4 to 20 mA DC linear or log can be selected. Input/output isolation
provided.
Output damping: 0 to 255 seconds.Hold / non-hold selection, preset value setting
possible with hold.
Contact Output: Four points, contact capacity 30 V DC 3 A, 25 0V AC 3 A (resistive load)
Three of the output points can be selected to either normally energized
or normally de-energized status.
Delayed functions (0 to 255 seconds) and hysteresis function (0 to 9.9
vol% O
2
can be added to high/low alarms.
The following functions are programmable for contact outputs.
(1) Abnormal, (2) High-high alarm, (3) High alarm, (4) Low-low alarm,
(5) Low alarm, (6) Maintenance, (7) Calibration, (8) Range switching
answer-back, (9) Warm-up, (10) Calibration gas pressure decrease
(answer-back of contact input), (11) Temperature high alarm,
(12) Blow back start, (13) Flameout gas detection (answer-back of
contact input), (14) Calibration coefficient alarm, (15) Startup power
stabilization timeout alarm
Contact output 4 is set to normally operated, and fixed error status.
Contact Input: Two points (voltage-free)
The following functions are programmable for contact inputs:
(1) Calibration gas pressure decrease alarm, (2) Range switching
(Switched range is fixed), (3) External calibration start, (4) Process alarm
(if this signal is received, the heater power turns off), (5) Blow back start
Contact capacity: Off-state leakage current: 3 mA or less
Self-diagnosis: Abnormal cell, abnormal cell temperature (low/high), abnormal
calibration, defective A/D converter, defective digital circuit
Calibration:
Method; zero/span calibration
Calibration mode; automatic, semi-automatic and manual (All are operated interactively
with an LCD touchscreen). Either zero or span can be skipped.