Advertisement
MODEL AP-301 Series
1)Power Connection
Connect the power to 0V(terminals 8) and +5V(terminal 9).
Use 5V±5% DC power. (Since the meter is not provided with a
power switch it is ready to start as soon as power is connected.)
There is not a fuse inside the mainframe, so if one is necessary
for safety, use a 0.2A fuse externally.
2)Decimal Point setting
Since the decimal point is not connected prior to shipment,
any decimal-point can be set on site by the customer by
connecting the connector terminals below.
3)Input connection
Connect an input signal(DC voltage)between HI(terminal 1) and
LO(terminal 2).
The circuit is on line whenever LO(terminal 2)is connected with
0V (terminal 8). Ground the input signal LO(terminal 2) side
wire and the power supply 0V(terminal 8) side wire at one point.
4)Hold and external start
The displayed value can be held by shorting the HOLD(terminal
4) with the 0V(terminal 8), or by setting the HOLD (terminal
4) to level"0". Measurement also starts by opening these
terminals or by setting the HOLD (terminal 4) to level"1" at
the necessary timing. The minimum time required to measure a
value once is about 400ms.
In addition, since the input LO(terminal 2)and power
0V(terminal 8) in this meter are not separated and insulated,
use a mechanical contact such as a relay or switch for external
control as much as possible. When controlling with a TTL or
transistor, add an external circuit as shown Fig.3.
5)Blanking
By shorting the BL(terminal 3) and 0V (terminal 8), the numeric
displays can be turned OFF, and this is recommended when power
saving is oregured. Also, when controlling with a TTL or
transistor, use a mechanical contact for external control and
add an external circuit as shown in Fig.3.
(Level"0" 0 to 1.5V, Level"1" 3.5 to 5V)
5.MAINTENANCE AND INSPECTION
5-1 Caution
Store the meter where ambient temperature is between -10℃ and
+70℃, and humidity is less than 60%. When used in a dusty
environment pull the meter out of the mainframe, and clear it,
as an accumulation of dust may lead to a rise in temperature
and a reduction in equipment life.
Also, since the mainframe case and the bezel are mode of plastic,
do not wipe stains off with volatile liquids such as thinners.
5-2 Calibration
・In order to assure the initial accuracy over a long period
of time, it is recommended that the meter be calibrated
periodically. When doing so, use standard equipment with
an accuracy of 0.01% or better.
Proofreading is 23 ℃ ±5 ℃, please carry out by the ambient
conditions of RH 35 to 85%.
VR2 (It is not in 11 to 14 range)
VR1
・Calibration procedures are as follows.
(1)Remove the front bezel.
(2)Connect the power to the meter for a warm up of 20 minutes
or more prior to adjustment.
(3)Zero adjustment
・11 to 14 range
Check to ensure that the display shows 000 by shorting
terminals HI(terminal 1) and LO(terminal 2).
*11 to 14 range does not have zero adjuster of zero point
adjustment VR2.
・1V range
Apply a voltage of +1V, DC to the input and then turn the
zero adjuster VR2 until the display shows 000.
(4)Span adjustment
・11 to 14 range
Apply voltage with a +polarity to the input corresponding
to the fullscale(1900), then turn the span adjuster VR until
the display shows 1900.
Next, apply voltage with a – polarity to check that the
display shows the value of 1900±0.1% of rdg +1digit.
Note: When the input is a – polarity, if the – sign is not
required, remove the front bezel and discoonect the
jumper wire(J1) on the left of the maximum
significant digit in the numeral display.
The display will then show the absolute value with
no "-" sign.
・1V range
Apply a voltage of +4.9V, DC to the input and then turn
the span adjuster VR1 until the display shows 1950.
6.Warranty
This meter is warranted for a period of one year from date of
delivery. Any defect which occurs in this period and is undoubtedly
caused by Watanabe Electric Industry faults will be remedied free
of charge.
This warranty dose not apply to the meter showing abuse or damage
which has been altered or repaired by others except as authorized
by Watanabe Electric Industry.
7.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
Electric Industry sales agent or Watanabe Electric Industry
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/
UU-33581j
(4/4)
Advertisement
