20
Model 7706 module
Gating provides specific control over when the Totalizer readings are taken. A gate always is interpreted if no gating signal is
present. To control counting through the G+ screw terminal, send a TTL high signal to enable counting and a TTL low signal
to disable counting. To control counting through the G- screw terminal, send a TTL low signal to enable counting and a TTL
high signal to disable counting. The Totalizer can be controlled from the G+ screw terminal, the G- screw terminal, or both (both
G+ and G- screw terminals have to be enabled to count). Samples of Totalizer input with gating are contained in
Figure 20
.
Figure 20
Sample totalizer input with gating
Viewing Totalizer count
View the Totalizer count by using the CLOSE key and entering the Totalizer channel number (front panel). This opens all relays,
switches the Model 2700 function to Totalizer (“TOTALIZE”), and remembers the previous function. In this mode, the
TOTalize:TYPE setting is ignored (effectively ‘READ’).
The front panel of Model 2700 is shown in
Figure 21
. When viewing the Totalizer count, the Model 2700 keys function as con-
tained in the list keyed to
Figure 21
.
Figure 21
Model 2700 front panel key operation (Totalizer)
TTL (J2 closed)
2.5V Threshold
Rising edge
detection
G+ HIGH
Counting enabled
+1
+2
+3
added to Totalizer count
G- (open)
IN+
IN-
G+
G-
GND
F
!
F
Model 2700
Multimeter / Data Acquisition System
RANGE
F
500V
PEAK
FRONT/REAR
3A 250V
AMPS
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1000V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
R
EXIT
ENTER
DIGITS RATE
REL
FILTER
TRIG
EX TRIG
STORE RECALL
OPEN
DCV
DCI
MATH
O U T P U T
RATIO
ACV
ACI
Ω
2
Ω
4
FREQ
TEMP
CH AVG
CONT
PERIOD SENSOR
LIMITS
ON/OFF
DELAY
HOLD
SAVE
SETUP
CONFIG
HALT
TYPE
LSYNC
TEST
MONITOR
STEP
SCAN
OCOMP
CH-OFF
CARD
CLOSE
Integra Series
RS-232
GPIB
1
2
3
4
