User manual

COUNTER AC7E
3
Impo Electronic A/S, Svovlhatten 3, DK-5220 Odense SØ, Denmark · Tel. [phone] · Fax [phone]
Counter AC7E data
Input data (input A and B):
Range, input A: DC to 2 MHz
Sensitivity, input A: Typ. 50 mV
rms
to 100 kHz
Typ. 500 mV
rms
to 2 MHz
input B: Typ. + 2 volt peak
Input coupling: DC
Impedance, input A: 1 M ohm with abt. 100 pF in parallel
input B: 100 k ohm
Attenuator, input A: automatic gain control (AGC)
input B: fixed gain
Trigger level: abt. 2/3 of signal peak value
Trigger slope: negative slope
Voltage range, input A: 50 mV
rms
to 250 V
rms
input B: 2 Vpeak to 100 Vpeak
Passage time + Time delay t
A
, t
B
, t
A → B
:
Range: 10 m secs. to 100 secs.
Resolution: 10 µ secs. in 1 m sec. to 1 sec. range
100 µ secs. in 1 sec. to 10 secs. range
1 m sec. in 10 secs. to 100 secs. range
Results stored: 3 timings
Results read-out Successive read-out of the 3 numbered results with up to 5 significant
digits.
Time unit: „m sec.“ indicated by decimal point on display
Overflow indication
at t > 100 sec.: Results flashing
Start A → Stop B t
A → B
:
Range: 10 µ sec. to 100 sec.
Resolution: 10 µ sec.
Results read-out: continuous read-out of count with up to 7 significant digits
Time unit: „m sec.“ indicated by decimal point
Frequency A
Counting technique: Reciprocal counting technique
Range: 0,01 Hz to 2 MHz
Resolution: 0,001 Hz to 1 Hz depending upon input signal
Gate time: 1 sec. or 1 period of the input, whichever is longer
Start of measurement: Continuously automatic or manual single start
Impulse counting A:
Range: 0 to 2 x 10
6
impulses per sec.
Gate control, man. start:1, 6, 10, 60 sec. as well as ∞
Resolution: 1 impulse
Read-out: Continuous sum value. For the selected time.
General:
Display: 7 digits 7 segment red light emitting diode (LED) display 20 mm high
Temperature range: 0° to +40° C
Time base: 12 MHz crystal controlled time base
Mains voltage: 230 V
rms
±10%
48 - 65 Hz
18 VA max.
Weight: 5.0 kg
Dimensions (mm): Width 350, height 105 (incl. support), depth 260
COUNTER AC7E
12
Impo Electronic A/S, Svovlhatten 3, DK-5220 Odense SØ, Denmark · Tel. [phone] · Fax [phone]
If this command is given once measurement has started, the measurement is rejected.
4.3 F3 Function 4: Frequencey A (single measurement) Measurement can be started with the
„D“ command or by pressing pushbutton D.R. Repeat D“ when new measurement is
required.
D Starts measurement.
R Puts Display result pushbutton on front panel out of function until the next command is
executed.
4.4 F4 Function 6: pulse counting A
. .1 T0 Infinite counting with start/stop either by means of the „D“ command or D.R.
pushbutton and continuous counting without zeroing-out first.
. .2 T1 Single measurement with a count time (gate time) of 1 second. Start with „D“ or by
pressing D.R. pushbutton.
. .3 T2 Same as preceding, though count time is 6 seconds.
. .4 T3 Same as preceding, though count time is 10 seconds.
. .5 T4 Same as preceding, though count time is 60 seconds.
. .6 R Puts D.R. pushbutton out of function until next command has been executed.
. .7 D Start / Stop measurement.
4.5 F Deletes read-out (display) and prepares for an experiment using the same function
again.
4.6 D In principle, performs same function as pressing Display Result pushbutton.
The command is described under the functions for which it is used.
4.7 R Puts Display Result pushbutton on front panel out of function until the next function has
been executed.
The command is described under the functions for which it is used.
B Baud rate command (ex. B1200). Valid values: 300, 1200, 2400, 4800, 9600.
? Help menu text lines returned.
V Shows version number
5 Interface Standard
Serial communications acc. to standard RS 232C / CCITT V.24 interface.
Full programmable to the following bit rates:
300, 1200, 2400, 4800, 9600 bit/sec. (basic setting 1200)
Full-duplex communications.