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MODEL AP-301 Series OPTIONAL Boards
4-2 Input/output terminal connection diagram
HOLD/BL
4-3 HOLD
When the HOLD terminal is shorted with the 0V terminal. The
displayed value just after their shorting is held.
The LO and 0V terminals on the optional board are not
DC-isolated.
4-4 Blanking
The numeric displayed-value can be erased by shorting the BL
terminal with the 0V terminal.
Use this function when power saving is required.
4-5 Scaling setting
・For this adjustment, standard equipment with an accuracy of more
than 0.01% is required. Adjust the meter in the following order.
(1) Firet, connect the power, then warm up the meter for more than
10 min.
(2) Offset
Fixed to 0
(3) Span adjustment
Apply the desired voltage to the input terminals, then set the
display unit to the desired value by turning the span adjuster
(VR).
(4) Setting width:
Fullscale variable width: 100 to 1999
５.MODEL AP-301-□□-C(Range selection)
Any measuring range from range cord "12" to range cords "13"
and "14" can be easily changed with the optional board mounted
on the AP-301-12. (Non-insulated type)
5-1 Specifications
・DC voltage measurement
Model and
Measuring
Range Codes
Range
AP-301-12-C
±1.999V
AP-301-13-C
±19.99V
AP-301-14-C
±199.9V
5-2 Input/output terminal connection diagram
WATANABE ELECTRIC INDUSTRY CO., LTD.
WATANABE ELECTRIC INDUSTRY CO., LTD.
ASAHI KEIKI DIVISION
Highest
Input
Max.allowable
resolution
Impendance
Input Voltage
Approx
1mV
1MΩ
Approx
10mV
1MΩ
Approx
100mV
1MΩ
5-3 Range selection
Set the 2-core shorting socket as shown in the following diagram.
For range cord "12": To No. 12
For range cord "13": To No. 13
For range cord "14": To No. 14
When the range is changed, calibrate the meter in accordance with
"Item 6-2" in the instruction manual for the AP-301.
5-4 HOLD
When the HOLD and 0V terminals are shorted, the displayed value
just after their shorting is held.
The LO and 0V terminals are not DC-isolated.
5-5 Blanking
The numeric displayed-value can be erased by shorting the BL and
0V terminals. Use this function when power saving is required.
６. MODEL AP-301-□□-D(Power isolation)
This optional board can be mounted on the AP-301 with any of range
cords from "11" to "14".
This board is power-isolated.
The LO terminal is floated from the 0V terminal.
(Dielectric strength: ±300V DC)
In addition to DC +5V(4.75 to 5.25V), DC +24V(19 to 29V)is available
as the power supply.
6-1 Input/output terminal connection diagram
6-2 HOLD
When the HOLD and 0V terminals are shorted, the displayed value
just after their shorting is held.
The input (LO) terminal of this option board is isolated from
the power (0V) terminal and HOLD terminal.
(Dielectric strength: ±300V DC)
6-3 Blanking
The numeric displayed-value can be erased by shorting the BL
terminal with the 0V terminal.
The input (LO) terminal of this option board is isolated from
the power (0V) terminal and BL terminal.
±100V
(Dielectric strength: ±300V DC)
7.Warranty
±250V
This board is warranted for a period of one year from date of
delivery. Any defect which occurs in this period and is undoubtedly
±500V
caused by Watanabe Electric Industry faults will be remedied free
of charge.
This warranty does not apply to the board showing abuse or damage
which has been altered or repaired by others except as authorized
by Watanabe Electric Industry.
8.After-sale service
This board is delivered after being manufactured, tested and
inspected under strict quality control.
However, if any problem does occur, contact your nearest Watanabe
Electric Industry sales agent giving as much information on problem
as possible.
6-16-19, Jingumae, Shibuya-ku, Tokyo 150-0001, Japan
6-16-19, Jingumae, Shibuya-ku, Tokyo 150-0001, Japan
Phone: (81)3-3400-6140
Phone: (81)3-3400-6141
Homepage http://en.watanabe-electric.co.jp/
Homepage http://www.watanabe-electric.co.jp/en/
UU-33582j
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