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MODEL AP-244A Series
2.3.3 ENABLE
All of the transistors are turned off for the open-collector output
or they are set to the high impendance state for the TTL output
with the ENABLE terminal shorted with the D.COM terminal or set
to level 0.
2.4 Selecting sampling speed
Select a sampling speed of 12.5 times/sec (50Hz) or 15 times/sec
(60Hz) depending on the commercial power frequency used. (If the
incorrect frequency is selected, the meter operates as usual but
its display may widely fluctuate.)
3. Calibration
In order to calibrate this meter, a standard voltage generator with
an accuracy of ±0.01% or higher is required. In addition, for
calibration, see the following Fig.
4.Specifications
Model No./
Measurem-
range codes
ent range
AP-244A-11-
±
XX-X
199.99mV
AP-244A-12-
±
XX-X
1.9999V
AP-242A-13-
±
XX-X
19.999V
AP-242A-14-
±
XX-X
199.99V
Accuracy: ±(0.03% of rdg. +1 digit) at 23℃±5℃
■General specifications
Measurement
：DC voltage measurement
function
Operation method
：Double integral
Input circuit
：Single-ended type
Max. display
: 19999
Sampling speed
：2.5 times/sec.
12.5 times/sec(50Hz) or
15 times/sec(60Hz)
Noise rejection
：NMR, More than 50dB(50/60Hz)
ratio
Overrange warning
："0000" or "-0000"flashes for an
input signal of more than 19999.
Display
：7-segment LED
(Red light emitting diode numeric
element) character height, 8mm
Polarity display
："-"is automatically displayed when
the computation result is minus.
External control
：HOLD・・・
Shorting START/HOLD terminal with
COM terminal(or level 0)
START・・・
Opening START/HOLD terminal from COM
terminal (or level 1)
Operating temp/
: 0 to 50℃/
humidity range
35 to 85%RH
Power supply
: 5 to 12V DC ±5%
12 to 24V DC ±10%
Consuming current
：At 5V DC・・・
Approx.100mA(BCD not provided)
Approx. 220mA(BCD provided)
At 12V DC・・・
Approx.50mA(BCD not provided)
Approx. 100mA(BCD provided)
At 24V DC・・・
Approx.30mA(BCD not provided)
Approx. 60mA(BCD provided)
Max.
Input
Max.allowable
resolution
impedance
Input Voltage
10μV
100MΩ
±100V
100μV
100MΩ
±100V
1mV
1MΩ
±250V
10mV
1MΩ
±250V
Dielectric
：Between LO input and 0V power
strength
terminals・・・
For 1 min. at 500V DC
Between LO input and D.COM output
terminals・・・
For 1 min. at 500V DC
Between 0V power and D.COM output
terminals・・・
For 1 min. at 500V DC
Between LO input terminal and
case・・・
For 1 min. at 1500V AC
Insulation
：Between each terminal described
resistance
above・・・
More than 100 MΩ at 500V DC
Dimensions
：48(W)×24(H)×87(D)mm
Weight
：Approx. 50g
Accessories
: Lower 10-pin connector・・・1pc.
Instruction manual・・・・・ 1 copy
Upper 26-pin connector・・・1pc.
(Only for BCD output)
5. Dimensions
6. Timing chart
7. Warranty and after-sale service
1) Warranty
This meter is warranted for a period of one year form date of
delivery. Any defect which occurs in this period and is
undoubtedly caused by Watanabe's faults will be remedied free of
charge. This warranty does not apply to the meter showing abuse
or damage which has been altered or repaired by others
authorized by Watanabe Co.,Ltd.
2) After-sale service
This meter is delivered after being manufactured, tested and
inspected under strict quality control. However, if any problem
does occur, contact your nearest Watanabe sales agent or Watanabe
directly giving as much information on problem as possible.
WATANABE ELECTRIC INDUSTRY CO., LTD.
WATANABE ELECTRIC INDUSTRY CO., LTD.
ASAHI KEIKI DIVISION
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://www.watanabe-electric.co.jp/en/
Homepage http://en.watanabe-electric.co.jp/
ED-50092c (2/2)
except as
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