User manual

COUNTER AC7E
6
Impo Electronic A/S, Svovlhatten 3, DK-5220 Odense SØ, Denmark · Tel. [phone] · Fax [phone]
COUNTER AC7E
Inputs
4 Input A - electrical impulse
Red input: Positive signal terminal, DC-coupled to input amplifier,
1 Mohm input resistance, frequency range from DC to 2 MHz,
sensitivity: DC - 100 kHz: Typ. 50 mV
rms
100 kHz - 2 MHz:Typ. 500 mV
rms
Black input: GND (chassis)
5 Input A - switch input
Blue input: + 8 Volt DC for switch, current = 1.7 mAmp.
Black input: GND (chassis)
6 Input B - DIN 6 pins for IMPO equipment
Cap: GND (chassis)
Pin 1: GND
Pin 2: + 8 Volt DC supply voltage for microphones, stroboscope accessories etc.
Pin 3: Input for photounit or mech. switch (as blue input #5)
Pin 4: 6.3 Volt AC supply voltage for photounit
Pin 5: 6.3 Volt AC supply voltage for photounit
Pin 6: Input for microphone etc.
AC coupled input amplifier, 4.7 kohm input resistance,
sensitivity 2 V
rms
(5 Hz - 20 Hz range)
7 Input B - Electrical impulse
Red input: Plus signal input
DC coupled input amplifier, 100 kohm input resistance,
Sensitivity 2 Volt
peak
.
100 Volt maximum input voltage (DC + peak)
Black input: GND (chassis)
8 Input B - same data as input A #5
9 Input B - same data as input A #6
COUNTER AC7E
9
Impo Electronic A/S, Svovlhatten 3, DK-5220 Odense SØ, Denmark · Tel. [phone] · Fax [phone]
Flashing light: A result is being shown on the display and new ones may be called by
pressing 11. Exception: by continous frequency and period time measurements
the results are automatically shown on the display consecutively.
13 FUNCTION SELECTOR push-button
Used for selction of function and also to clear counter for new measuring operation.
See 14 below.
14 FUNCTION SELECTOR LED
Constant light: When 13 is pressed the counter will prepare for function selection. The LEDs
14 plus the one indicating the function selected will now flash. If the button is
not pressed again within 5 seconds, the LEDs will show constant light again and
the counter is ready to start measuring.
Flashing light: By pressing 13 the LED 10 by the function descriptions will switch to the next
function by pressing 13 again to the next function and so on until the button 13
has not been pressed for about 5 seconds. The LEDs will then revert to constant
light.
LED off: The push button 13 is not active, and nothing happens, when the button is
pressed.
15 mSec. LED
When this LED is on, the result being shown on the display is indicated in milli-second units.
16 Hz LED
When this LED is on, the result being shown on the display is indicated in Hz units.
17 INPUT A LED
By continous measurements of period time the LED will flash in time with the measurements as the
input is opening and closing all the time.
18 FUSE HOLDER
Carries wire fuse (fine-fuse 250 volt/1 amp. slow) for the protection of 6 volt AC supply to IMPO photo
units.
19 EARTH LEAD SOCKET
4 mm for connecting external equipment to the electrical earth (through the mains cable).
20 MAINS POWER SUPPLY CABLE
For connecting counter to 230 volt AC mains supply. Consumption approximately 60 VA. The counter
has a built-in wire fuse for mains supply (0.35 amps. slow).
Additional test functions:
1. Counter and display test:
Turn off power 2. Press the DISPLAY RESULT 11 push-button constantly and turn on the power
2. The internal counters and the display circuit are now tested by the microprocessor.
2. Program version number:
Turn off power 2 . Press the DISPLAY RESULT 11 AND the FUNCTION SELECTOR 13 push
buttons constantly and turn on the power 2.
The display will now show the version of the internal program memory.