YOKOGAWA EXA TB TB400G, User Manual

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<6. PROCEDURES FOR CONVERTER OPERATION>
6-24
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
(5) Setting Change-over Point in Auto-ranging (FUNCTION "7")
If auto-range is used, the range is changed over at the point set here. The change-over point is
displayed and set at a ratio (%) to the upper limit setpoint of the range. The following shows the
operating manner.
• The time to change over from the lower range to the higher range is the point where
measured values become large than the change-over point in the lower range.
• The timing to change over from the higher range to the lower range is a point where
measured values become 10% smaller than the change-over point in the lower range.
The following describes the setting operations.
(Example of display)
(1) Select FUNCTION "7" in the <PROGRAM1> => 00080%
mode.
(2) Press the [>] key. => 0 0080%
The most significant digit flashes.
(3) Select a digit with the [>] key and set it to the => 00090%
desired value using the [^] or [v] key. The flashing digit moves to the right
and when the least significant digit is
reached, it returns to the most
significant digit.
(4) Press the [ENT] key to enter the set value. => 000 9 0%
The entire display flashes once.
In step 4, if the set value is beyond the permissible range (70 to 100%), "not" is displayed. Reset
the message by pressing the [>] key and repeat the operations from step 2.
(6) Setting High Alarm Value (FUNCTION "8")
In the high and low alarm detection function is set to "execution" (FUNCTION "9." in
<PROGRAM2> mode), when a measured value exceeds this setpoint, the MEAS lamp flashes
and if AUX (C1, C2) contacts are set for high and low alarms (FUNCTION "E." in <PROGRAM1>
mode), the contact output is actuated. Alarm hysteresis is 2% of the setpoint.
The following shows the setting key operations.
(Example of display)
(1) Select FUNCTION "8" in the <PROGRAM1> => 2200.0 mg/L
mode.
(2) Press the [>] key. => 2 200.0 mg/L
The most significant digit flashes.
(3) Select a digit with the [>] key and set it to the => 1 0 00.0 mg/L
desired value using the [^] or [v] key. The flashing digit moves to the right
and when the least significant digit is
reached, it returns to the most
significant digit.
(4) Press the [ENT] key to enter the set value. => 1000.0 mg/L
The entire display flashes once.
In step 4, if the set value is beyond the permissible range (-10 to 2200 mg/L), "not" is displayed.
Reset the message by pressing the [>] key and repeat the operations from step 2.