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Section III
INTERNAL OR
EXTERNAL
TRIGGERS (UP TO 1000/S)
STORAGE
FLAG
(FROM
DVM)
16TO
20,..s
~~~~~-
-~~~--1 ·r--~~--"'-"1~~~~~
I
PRINTER HOLD-OFF
(TO
DVM)
I
~:-.--iU
STATUS FLAG (FROM OVMI
STORAGE CYCLE
10,
20, 30,40,
or
50 READINGS
DEPENDING
ON STORAGE UNIT
l
lll!IOA-
8
-251
..
TIME
TO PRINT
(50TO
100ms)
OUTPUT CYCLE
10.20. 30,
40,
OR 50
READINGS
DEPENDING ON STORAGE UNIT
0 00
Figure 3-2. Basic Operation of Data Storage.
Basic operation of Data Storage uses Storage Flag to indicate when
readings are ready
.
Printer Hold-Off
is
used with digital
recorders
for
automatically
outputting data. Dump Hold (not
shown)
is identical
but of opposite
sense.
Status Flag indicates if Data Storage is storing
or outputting data.
INTERNAL
OR EXTERNAL TRIGGERS
(UP
TO
1000/s)
- i
n
I
---uu----
~
0
:
NUMBER OF READINGS
1
LESS THAN
STORAGE
UMIT
DELAY
;;.
50
µs
JUMP
(TO
DVM)
STORAGE
FLAG
!FROM DVM)
I
I
PRINTER
HOLO·OFF
(TO
OV~I-
_
___r--u--
1
STATUS FLAG (FROM DVMl
llJIOA-
8-2515
STORAGE CYCLE
OUTPUT CYCLE
10.
20,30.40. OR 50 READINGS
DEPENDING ON STORAGE
LIMIT
Figure 3-3. A Jump Command.
A Jump command may be used to output a non-multiple of 10
readings.
In this case, the number of readings is less
than
Storage
Limit. After all triggers have been issued, a Jump is given to begin an
output cycle; otherwise, storage will wait for the remaining triggers
required to fill up to
the
Storage Limit. The last reading
is
repeated
to
fulfill the number set by Storage Limit.
3-4
STORAGE
LIMIT= 10
1050014679
0950014679
0850014679
0750014679
0650012437
0550001956
0450002458
0350011400
0250010499
0150009567
11110&-1-2011
POLARITY/OVERLOAD
Model l 1180A
}
7th READING REPEATED
3 TIMES WHEN
JUMP IS ISSUED
Figure 3-4. Printer Output.
Printer output on a 2070A Data Logger when 7 de readings are
made on the 100 mV range, stored, and printed out. Since the
number of readings
is less
than the Storage Limit, a Jump must be
issued to begin the output cycle
.
Note that the 7th reading is
repeated
three times.
EXTERNAL TRIGGERS WP TO
1000/sl
1IULJ
ooo 1 J l J 1 J 1 J l i l j o oo
I
INTERNAL
TRIGGERS
(UP
TO 40 /s)
1IUlf
ooo
lILilJu---
STORAGE FLAG
PRINTER HOLO·OFF
INPUT
CYCLE
ICONTINUOUSL
Y
INPUTS READINGS
INTO
STORAG
E!
INPUT CYCLE HOLD (GROUNOEOJ
PRESET TRIGGER
"O"
l
lllOA·B-2!117
OUTPUT CYCLE
(OUTPUTS
10,
20.
30.
40.
OR 50
READINGS!
Figure 3-5. Preset Trigger.
Preset Trigger
"O"
may be used to automatically
start
one complete
storage and output cycle. Triggers may be external or internal. Input
Cycle Hold must be grounded. The number of readings taken will
equal the Storage Limit. The DVM samples prior to a Preset Trigger
at the rate of the trigger source.
This
allows the user to make
manual adjustments on his system.
I'
J
l ' .
.
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J
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h
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J
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J
u
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