(1)The application of voltage or current exceeding its maximum
allowable value to the input terminals may result in instrument
damage.
(2)The supply of power out of its allowable range may cause fire,
electric shock or instrument failure.
(3)The content of this manual may subject to change without prior
notice for product improvement.
(4)This manual is carefully prepared. However, if any question
arises, or any mistake, omission or suggestion is found in the
content of this manual, contact your nearest our sales agent.
2.3. Terminals
2.4. Connection examples
1.Outline
The Model AL-512 digital panel meter is a process monitor which
has an extremely thin 3-1/2 digit LED display unit and also does
not require a power supply (driven by a 4 to 20mA signal).
It is provided with the display having a maximum of 1999 and the
scaling function by which the input signal can be converted to any
process variable for its display. In addition, wiring can be easily
conducted by the use of a screw terminal board.
2.Before operation
2.1. Accessory check
The following accessories are attached to one Model AL-512 digital
panel meter.
Instruction manual One copy
Screw terminal cover 1 pc.
If any question may arise on these accessories, please contact your
nearest Watanabe sales agent or Watanabe directly
2.2. Mounting
2.2.1. Panel cutout dimensions
Prior to mounting the meter, make the cutout through the panel as
shown in the following figure.
Panel cutout dimensions
2.2.2. Mounting
For mounting the meter, insert it in the panel cutout from the front
of the panel while pushing the hooks on both sides of the case in
the case. (See the following figure.)
Mounting diagram
*The Model AL-512 meter produces a voltage drop of about 5.3V
(at an input of 20mA).
For this reason, conduct wiring in consideration of the impedance
in the entire circuit.
*If this meter is used at a noisy location, ground the E (earth)
terminal.
3. Functions
3.1. Scaling adjustment
First, remove the front panel of this meter by referring to the
following figure. Then, turn the Offset adjuster (see the following
figure) until the desired value is displayed (setting range: ±
200) with an input signal of 4mA applied to the input terminals
on the meter.
Next, turn the Fullscale adjuster (see the following figure) until
the desired value is displayed (setting range: 100 to 1999) with an
input signal of 20mA applied to the input terminals.
*Prior to conducting scaling adjustment, allow more than 20 minutes
for the meter to warm up.
INSTRUCTION MANUAL
DIGITAL PANEL METER
Caution
MODEL AL-512 SERIES
WATANABE ELECTRIC INDUSTRY CO., LTD.
