Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 33)

IM 11M13A01-02E 2-14
Output Related Items: Analog output/output mode selection, output conditions when
warming-up/maintenance/calibrating (during blowback)/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 3 (abnormal, high-high alarm, high-alarm, low-alarm, low-low
alarm, maintenance, calibrating, range switching, warming-up,
calibration-gas pressure decrease, temperature high-alarm,
blowback, flameout gas detection, calibration coefficient alarm,
startup power stabilization timeout alarm)
Converter Output: Two points mA analog output (4 to 20 mA DC (maximum load
resistance of 550
⍀)) and one mA digital output point (HART)
(minimum load resistance of 250
⍀).
Range: any setting between 0 to 5 through 0 to 100 vol% O
2
in
increments 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.
Can select hold or non-hold, and set preset value for hold.
Contact Output: Four points, contact capacity 30 V DC 3 A, 250 V 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) Blowback start,
(13) Flameout gas detection (answerback 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) contact in inputs
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