Yokogawa Integral Oxygen Analyzer ZR202 User Manual
Page 25
IM 11M13A01-04E
2-7
2. Specifications
Contact Related Items: Selection of contact input 1 and 2, selection of contact output 1
and 2 (abnormal, high-high alarm, high-alarm, low-alarm, low-low alarm,
maintenance, calibrating, range switching (switched range is fixed), warmingup,
calibration-gas pressure decrease, flameout gas detection (answerback of contact
input)
Converter Output: One mA analog output point (4 to 20 mA DC (maximum load
resistance of 550
⍀)) with 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 of 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 (answerback of
contactinput), (11) Flameout gas detection (answerback 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 (switchedrange
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; automatic, semi-automatic 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 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/23 hours.