YOKOGAWA EXA TB TB400G, Руководство пользователя

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<5. FUNCTIONS>
5-2
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
Table 5.1 Failure Detection Function
Detected item Details
Generation
mode
Error
No.
FAIL
lamp
Detection on/
off setting
Mode FUNC-
TION
1 Turbidity
overrange
This is detected if the measurement signal from the
detector is out of the permissible range is approx.
+0.5 V to -2.45 V across S1 and AG terminals in the
converter.
MEAS. Err11
○
PRO-
GRAM 2
1.
2 Lamp
disconnection
This is detected if the lamp goes off and the reference
signal drops to approximately -0.5 V or less.
MEAS. Err12
○
PRO-
GRAM 2
2.
3 Lamp voltage
failure
This is detected if the lamp voltage is out of the
permissible range. The permissible range is
approximately 3 V to 6 V across terminals P1 and P2
in the converter.
MEAS. Err13
○
PRO-
GRAM 2
3.
4 AD circuit
failure
(1) Detected if analog-to-digital conversion is not
completed in the predetermined time.
(2) If the converted data are out of the permissible
range, this is detected if the input is swiched to a
simulated input and the converted data are again
out of range.
All modes Err14
○
PRO-
GRAM 2
4.
5 Memory
comparison
failure
Data such as setpoints are stored in two places in the
EEPROM. This is detected if the results of regular
comparisons of such data do not agree.
All modes Err15
○
PRO-
GRAM 2
5.
6 RAM failure Detected if the result of a comparison of specified
data in writing and reading immediately after turning
on power does not agree. If detected, subsequent
operations cannot be accepted.
When
power is
turned on
Err16
○
7 EEPROM
failure
Immediately after turning on power, the data stored
in two places in the EEPROM are compared. If they
do not agree, this item is detected if the result of the
comparison of specified data in writing and reading
does not agree. If detected, subsequent operations
cannot be accepted.
When
power is
turned on
Err17
○
8 Reference
signal voltage
failure
If the reference signal from the detector is out of
the permissible range, this item is detected. The
permissible range is approxi0.5 V to -2.45 V
across terminals S2 and AG.
MEAS. Err18
○
PRO-
GRAM 2
6.
9 Zerocalibration
range
exceeded
Detected when the input value in zero calibration is out
of the permissible range. The permissible range is ±10
mV.
When
calibration is
carried out
Err21 X
10 Span
calibration
range exceed
Detected if the input value in span calibration is out of
the permissible range. For span calibration (standard
solution reference), the permissible range is 50 to
400%.
For span calibration (sensitivity correction), the
permissible range is 0.25 to 400.
For details, see section 5.3 *3.
When
calibration is
carried out
Err22 X
11 Zero-shift
calibration
range exceed
Detected if the zero-correction coefficient in zeroshift
calibration is out of the permissible range.
The permissible range is ±9 mg/L.
When
calibration is
carried out
Err23 X
12 Calibration
plate failure
Detected if the input value in span calibration is out of
the permissible range. The permissible range is ±50%
of the calibration plate setpoint.
When
calibration is
carried out
Err24 X
13 Lamp life *1 Detected of the lamp voltage reaches the upper
control limit. The upper limit is approx. 4.8 V *4
across terminals P1 and P2.
MEAS. Err25
○
PRO-
GRAM 2
7.
14 Failure in
automatic
zero
calibration *2
Detected if the zero input value in automatic zero
calibration is out of the permissible range. The
permissible range is ±10 mV.
MEAS. Err26
○
PRO-
GRAM 2
8.
15 High and low
alarm *3
Detected if the turbidity signal exceeds the upper or
lower limit setpoint. When shipped from the factory,
these are set at -10 (lower) and 2200 (upper) mg/L.
MEAS. "MEAS."
flashes.
X PRO-
GRAM 2
9.
16 CPU failure CPU failure. Normally this does not occur. All modes Only the "FAIL" lamp is lit and no
operations are accepted.
• In the "FAIL lamp" column, ○ means the lamp lights and × the lamp goes out.
• The items for detected failures for which both the mode and function are described can be selected for execution/stop of detection (see
Section 6.7).
• Errors detected other than in calibration are automatically reset at the time when the cause of failure is removed.