YOKOGAWA EXA TB TB400G, User Manual

Page: 92 / 157

<6. PROCEDURES FOR CONVERTER OPERATION>
6-5
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
6.2.2 Functions in <MAINT.> Mode
Table 6.4 gives details on the functions in the <MAINT.> mode.
Table 6.4 Function in <MAINT.> Mode
F Operation
Permissible
calibration range
Initial
indication
Remarks
1 Zero calibration (zero water) -10 to 10 mV Measured
turbidity value
Uses zero water.
2 Zero calibration (lamp is off) -10 to 10 mV Measured
turbidity value
Automatic turning off of light source
3 Zero-shift calibration (zero-point
correction)
-9 to 9 mg/L (deg.) Measured
turbidity value
Zero-shift calibration (zero correction)
4 Span calibration (standard
solution or calibration plate)
50 to 400% Measured
turbidity value
Selection of calibration plate/
standard solution
5 Span calibration (sensitivity
correction)
0.25 to 4 Measured
turbidity value
Sensitivity correction for the
standard solution (calibration plate)
reference
6 Manual start of automatic
cleaning
— JEt Effective for the model with
automatic cleaning (Suffix code:
-A2 or -A3)
7 Manual start of automatic
calibration
— A_CAL Effective for the model with
automatic zero calibration (Suffix
code: -A3)
8 Reference sensitivity calibration
*1
— Measured
turbidity value
Criteria for slope failure
9 Converter check operation — C.CHEC Checked by switching to dummy input.
Display --> 50.0 mg/L (deg.)
Output --> 12 mA
A Error code indication — E.CHEC
B Error reset — CL_Er
C Calibration of lamp control
reference value
0.2000 to 2.3000 V L_CAL The lamp voltage is set at 3.6 V
and the reference signal is stored
as the reference value.
D —
E Version number indication — — Example: 1.08
F Password setting for changing
the adjustment mode
—
_ _ _
00
1.
|
F.
(Not to be selected)
*1: Set the sensitivity after the reference sensitivity performed upon shipment from the factory to 100% and check the slope in
normal span calibration taking value as a reference.
Note 1: The values in the columnfor the initial value are those shown when the memory storing the data is initialized.
These are partially different from the values set upon shipment from the factory.
Note 2: If a function code which is not used is selected, "_ _ _ _ _" is displayed.