Yokogawa Integral Oxygen Analyzer ZR202 - Manual (Page 24)

<2. Specifications>
2-5
IM 11M12A01-04E
Converter Output: One mA analog output point (4 to 20 mA DC (maximum load resistance of
550Ω)) with mA digital output point (HART) (minimum load resistance of
250Ω).
Range; Any setting between 0 to 5 through 0 to 100 vol% O
2
in 1 vol% O
2
,
and 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.
Output damping; 0 to 255 seconds.
Hold/non-hold selection, preset value setting possible with hold.
Contact Output: Two points, contact capacity 30V DC 3A, 250V AC 3A (resistive load)
One of the output points can be selected to ether normally energized or nor-
mally 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) Flameout gas detection (answer-back of contact input).
Contact Input: Two points, voltage-free contacts
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)
Self-diagnosis: Abnormal cell, abnormal cell temperature (low/high), abnormal calibration,
A/D converter abnormal, digital circuit abnormal
Calibration: Method; zero/span calibration
Calibration mode; Auto, semi-auto and manual (All are operated using
optical switches). Either zero or span can be skipped.
Zero calibration gas concentration setting range; 0.3 to 100 vol% O
2
(in 0.01
vol% O
2
).
Span calibration gas concentration setting range; 4.5 to 100 vol% O
2
(in 0.01
vol% O
2
).
Use nitrogen-balanced mixed gas containing 0 to 10 vol% O
2
scale of
oxygen for standard zero gas and 80 to 100 vol% O
2
scale of oxygen for
standard span gas.
Calibration period; date/time setting: maximum 255 days