Digital Wall Mount-Area Monitor
Common Options and Modifications
15
Common Options and Modifications
Time and Date Stamp Option
Description
When an alarm or failure occurs, the Product will print the current reading, date,
time, and either ALARM or FAIL to the RS-232 port. The instrument will print
once every 30 seconds as long as the alarm or fail condition is present.
Setup
You will need the following: the Product, a 1220 40-column printer, and a cable
(LMI PN: 8303-674)
The printer should be configured at 2400 bps (baud), no parity, 8 data bits, 1 stop
bit, and no handshaking. See printer manual for proper setup instructions.
Date and Time
Check the month and day (MMDD) by pressing the
LOW ALARM
and
HIGH ALARM
buttons simultaneously. The month and day will be displayed as
long as those buttons are pressed. The month and day can be set from 0101 to
1231.
Check the year (YYYY) by pressing the
LOW ALARM
and
CAL CONST
buttons
simultaneously. The year will be displayed as long as those buttons are pressed.
The year can be adjusted from 0000 to 9999.
Check the hours and minutes (HHMM) by pressing the
LOW ALARM
and
DEAD TIME
buttons simultaneously. The hours and minutes will be displayed as
long as those buttons are pressed. The hours and minutes can be adjusted from
0000 to 2359.
RS232 Data Format
The data will be sent to the RS-232 port as:
Byte
1
0 x Byte
18
Space
(20H)
Byte
2
x x Byte
19
H
Byte 3
x OR
x
Byte 20 H
Byte
4
x x Byte
21
:
Byte
5
. . Byte
22
M
Byte
6
x 0 Byte
23
M
Byte 7
Space (20H)
Byte 24 :
Byte 8
Space (20H)
Byte 25 S
Byte 9
Space (20H)
Byte 26 S
Byte
10
M
Byte
27
Space
(20H)
Byte
11
M
Byte
28
A
Space
Byte
12
/
Byte
29
L
F
Byte
13
D
Byte
30
A OR A
Byte
14
D
Byte
31
R
I
Byte
15
/
Byte
32
M
L
Byte
16
Y
Byte
33
Carriage Return (0DH)
Byte
17
Y
Byte
34
Line Feed (0AH)
Example output:
0642.1 04/21/95 16:56:24 ALARM
0000.0 04/21/95 08:32:16 FAIL
Modifications to the Product for Optimum Performance
The Product main board (LMI PN: 5396-160) has these modifications:
•
U531 changes from an LM358 to an OPA2343UA; LMI PN: 06-6582
•
C531 changes from 10
μ
F tantalum to 0.047
μ
F “poly film” (Polypropylene
sulfide), LMI PN: 04-5729
•
R432 changes from 100 k to 1 mg, LMI PN: 12-7844
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