APPA 103N - Page 12

103N / 105N / 106
EN
(12) Auto Power O󰀨 (APO)
(13) Disable Auto Power O󰀨
(14) RS232
The APO sign on the LCD panel indicates the meter is
working in the Auto Power O󰀨 mode. If the meter idles
for more than 30 minutes, the meter automatically turns
the power o󰀨. When this happens, the state (non-logic
measurement) of the meter is saved, the meter can be
turned back on by pushing any key switch, except back
light switch, or changing the rotary switch. If the meter
is Re-Powered on by pushing key switch, the LCD
displays the saved state when meter auto power o󰀨
itself, pushing Hold key switch to disable the hold state.
The meter will give periodic alarm in 15 seconds before
automatically turns power o󰀨 by itself, any key press or
rotary change reset Auto-Power-O󰀨.
In order to disable auto power o󰀨 function, power on
the meter with pressing anyone of switches, except
HOLD switch, back light switch or BLUE switch (for
function change) is pressed down.
Sent a single command string “H” ( Hex code “48” )
to the multimeter or shine the ashlight on the RS232
socket of the meter to enable or disable the RS232.
When enable the RS232 the LCD display shows the
RS232 annunciator.
The serial data is send from RS232 cable twice every
A/D conversion cycle. The data format complies with
JIS 7BIT transmission code with a baud rate of 2400.
The user can use RS232 interface to read the data.
A single dada packet includes a start bit (always 0), 7
data bits, an odd parity check bit, and a stop bit (always
1). The following gure shows
0
1
LSB M SB
-12V
12V
11