P-4/4
3. Display
3-1. When the power is turned on, using the AC adapter, all the display segments illuminate, and then
the weighing data transmitted from the weighing instrument appears. The status of the data is
indicated by a triangle ( ).
Table 3 Symbols and data status
Symbol
Status of weighing data
ST
The weighing data is stable.
(-)
The weighing data is negative.
This symbol appears for a 7-digit negative value.
Usually the minus sign is placed before a numeric
value.
mom
The weighing unit is momme.
ct
The weighing unit is carat.
g
The weighing unit is gram.
Note) The unit indicating does not illuminate for weighing units other than
described above.
3-2. If the weighing data is in overload,
or
appears.
3-3. If the data receiving procedure is interrupted, the display becomes blank.
3-4. If the power is turned on without a weighing instrument connected, all the display segments will
remain illuminated.
4. Maintenance / Troubleshooting
4-1. Cleaning
For cleaning, wipe the AD-8920 with a soft cloth. Do not use solvents such as thinner.
4-2. If the display brightness is not even:
Turn the AD-8920 on with the weighing instrument disconnected. All of the display segments will
illuminate. Leave the AD-8920 this way for a few hours.
4-3. If the AD-8920 does not function properly: (Before asking for repair, check the following.)
・
Is the AC adapter type correct?
・
Is the cable connected firmly?
・
Are the weighing instrument settings correct?
(Particularly, has the data output mode been set to stream mode?)
・
Is data other than the weighing data, such as time or ID number, being output?
5. Specifications
Table 5-1 Specifications
Power
consumption
Approx. 5VA supplied to the AC adapter
(Approx. 8VDC, approx. 0.2ADC
supplied to the AD-8920)
Display
7-digit VFD, Character height 13mm
Signal
RS-232C / Current loop (ACTIVE)
Baud rate
600bps / 2400bps
Length, Parity bit
7 bits-even, 7 bits-odd, 8 bits-none
Stop bits
1 bit or 2 bits
Table 5-2 Pin assignment
Terminator
<CR> or <CR><LF>
Pin No.
RS-232C
Current loop
2
RXD (Connects to the TXD output
of the weighing instrument)
Current loop
(+)
Display
refresh rate
Approx. 10 times/second
(when baud rate is 2400bps) *1
3
SG (Connects to SG)
Current loop (-)
Input connector
Modular jack
1, 4
Used internally
Communication
cable
Approx. 1 m *2
*1
With the condition that the weighing instrument
transmits data 10 times per second.
Dimensions
120(W)
×
90(H)
×
76(D)
Unit: mm
:
*2
A special communication cable of approx. 5 m is available.
Net weight
Approx. 220g
*3
*3
AC adapter and communication cable are not included.
6. External dimensions
Pin 4
Pin 1
Modular jack
terminal No.
1WMPD4000178C
