Universal Counter SC-7205A

Featuring a user-friendly “one-key, one-action” system.Our high-cost-performance counters are available in a lineup of three variations!

The universal counter SC-7205A features frequency, cycle, time interval, pulse width, phase, frequency ratio, duty ratio, cumulative count, and peak voltage measurements for easy, versatile measurement. As a basic piece of measurement equipment for development work and technical education, they are also ideal for introduction to production and inspection lines.

Easy operations with single key strokes for each action.
Easy to see fluorescent display tube. Detailed information is shown on a 5 × 7-dot display.
* The full spelling display guide strongly supports operations.
Auto-trigger function that does not require setting the trigger level. Manual settings are also possible.
Comparator and statistical operation function make it easy to improve the efficiency of line inspection work.
Unit conversion (rpm, speed, etc.) is possible using the scaling operation function.
It is easy to check the waveform amplitude by measuring the peak voltage of the input signal.
Streamline routine inspection work by saving/recalling panel setup.
RS-232 interface for full remote control
200 data/sec real-time transfer possible
* GPIB interface SC-701 (factory option)
Highly expandable options
Comparator output with digital I/O (SC-702). External trigger input.
* A generous output of 150mA and 50V that can be used as it is for line monitoring equipment.

Measurement function (selection guide)

Measurement function		Gate				Equipped model
Measurement function		Internal	EXT-B	MANUAL	SGL	SC-7207H	SC-7206H	SC-7205A
FREQ-A	Frequency	○	○	×	○	○	○	○
FREQ-B	Frequency	○	×	×	○	○	×	○
FREQ-LINE	Frequency	△	×	×	×	○	×	○
FREQ-C	Frequency	○	○	×	×	○	○	×
PERI-A	Period	○	○	×	○	○	○	○
DUTY-A	Duty	○	×	×	○	○	○	○
P.W-A	Pulse width	○	×	×	○	○	○	○
TOT-A	Addition counting	○	○	○	×	○	○	○
T.INT A-B	Interval	○	×	×	○	○	×	○
FREQ A/B	Frequency ratio	○	×	×	×	○	×	○
PHAS A-B	Phase	○	×	×	○	○	×	○
Peak voltage A		－	－	－	－	○	○	○
Peak voltage B		－	－	－	－	○	×	○

○… Selectable × … Disabled △… Disabled for 1ms, 10ms

Various interfaces and options

GPIB Interface SC-701 (for SC-7205A)

Factory Option. Please order at the same time as the main unit.
The universal counters SC-7207H, SC-7206H, SC-7205H, and SC-7205A have a built-in SC-701 (SC-7207H, SC-7206H are standard equipment), which enables remote setting and external transmission of measurement result data related to measurement reset, measurement function, time base, calculation, etc. by an external GP-IB controller.

Electrical and mechanical specifications are in accordance with IEEE 488.1.
It has the following interface functions for GPIB.
SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0
It has a REMOTE/LOCAL status LED indicator.
Fully remote control supported (except for some functions such as on/off of the power switch and remote related settings.)

Equipped model

SC-7207H , SC-7206H：Standard equipment
SC-7205A , SC-7205H：Option

Address settings

The following settings are possible through the SYSTEM menu of UTILITY.

The 31 types of device addresses from 0 to 30 can be selected at will.
One of CR+LF or LF can be selected as the delimiter.

Digital I/O SC-702 (for SC-7207H, SC-7206H, SC-7205H, SC-7205A)

Factory Option. Please order at the same time as the main unit.
By integrating the SC-702 (digital I/O), the universal counter SC-7205A can control the start of measurement and output the comparator operation result (open collector). By connecting lamps, etc. to the exterior, you can easily visualize parts sorting and inspection results.

Timing chart

Control signal

	Details
/TRIG C-MOS input	Start the measurement with an L pulse of 10ms or more during the /BUSY = Z period. The /TRIG signal during the /BUSY = L period is invalid.
/BUSY open collector output	Measuring L (output transistor on), non-measuring Z (output transistor off)
/HI, /LO, /GO Open collector output	One place is L (output transistor on) according to the comparator operation result
Otherwise, Z (output transistor off)

Output terminal maximum setting

Withstand voltageDC50V
Withstand current DC150mA
Frequency responseDC～1kHz

Input terminal maximum rating

Withstand voltageDC5V
Frequency responseDC～1kHz

High stability reference oscillator SC-703A

Factory Option. Please order at the same time as the main unit.

Item	Performance
Oscillation frequency	±0.05ppm +25°C as reference 0°C to +40°C range
Rise time	±±0.05ppm 10 minutes after power on based on the frequency 1 hour after power on
Change over time (/day)	±0.02ppm Value after 72 hours based on 48 hours after power is turned on
Change over time (/month)	±0.1ppm Value after one year based on 10 days after power is turned on

Other options

型名	概要	Appearance
SC-525	USB-RS converter. By adopting a cross cable and using the RS connector as a female connector, it is possible to directly connect the USB port and the measurement equipment. You can use an external controller (usually using a PC) to perform the same operations as when you manually control using button operation on the main unit. Not only operations, but also measurement result data collection is possible (interface specifications are the same as the standard RS-232).

Specifications
FAQ

Frequency A(FREQ-A, FREQ-B)

Measurement range and resolution

		Specifications
Reference time (reference frequency)		100ns(10MHz)
range	Coupling DC	0.6mHz～230MHz
range	Coupling AC	10Hz～230MHz
Resolution and count method	Measured signal	Less than 10MHz	10MHz or more
	Count method	Reciprocal count	Direct count
	1ms gate	4-digit	1kHz
	10ms gate	5-digit	100Hz
	0.1s gate	6-digit	10Hz
	1s gate	7-digit	1Hz
	10s gate	8-digit	0.1Hz
	EXT-B gate*	Reciprocal count method. The maximum number of digits is determined by the EXT gate time.
	SGL gate	Reciprocal count method. The number of digits is determined by the measured signal.

EXT-B cannot be used when using FREQ-B input.

Measurement error

The reference oscillator accuracy is the temperature characteristic of the reference oscillator.

Frequency LINE(FREQ-LINE)

Measurement range and resolution

		Specifications
Reference time		100ns
range		45Hz～440Hz
Resolution	0.1s gate	6-digit
	1s gate	7-digit
	10s gate	8-digit

Measurement error

The reference oscillator accuracy is the temperature characteristic of the reference oscillator.

Period A(PERI-A)

Measurement range and resolution

		Specifications
Reference time		100ns
range	DC couple	5ns～1,717s
range	AC couple	5ns～0.1s
Resolution	Count method	Reciprocal count
	1ms gate	4-digit
	10ms gate	5-digit
	0.1s gate	6-digit
	1s gate	7-digit
	10s gate	8-digit
	EXT-B gate	The maximum number of digits is determined by the external gate time
	SGL gate	The number of digits is determined by the measured signal

Measurement error

The reference oscillator accuracy is the temperature characteristic of the reference oscillator.

Duty ratio A(DUTY-A)

Measurement range and resolution

		Specifications
Input signal frequency range		Same as FREQ-A
Measurement range	SGL gate	0.01µ～99.999,999,99[%]
Measurement range	Internal gate	2μ2µ～99.999,998[%]
Measurement resolution (Internal gate average count)	SGL gate	100ns/input cycle × 100[%]
Measurement resolution (Internal gate average count)	1～24 24～2,499 2,500～249,999 250,000～24,999,999 25,000,000 or more	100ns/average input cycle × 100[%] 10ns/average input cycle × 100[%] 1ns/average input cycle × 100[%] 100ps/average input cycle × 100[%] 10ps/average input cycle × 100[%]

Measurement error

Pulse width A(P.W-A)

・Minimum pulse width : 6ns

・Maximum repetition frequency : 80MHz

Measurement range and resolution

		Specifications
Reference time		100ns
Measurement range	SGL gate	100ns～1,717s
Measurement range	Internal (1 ms to 10s) gate	100ns to approx. 1/2 gate time
Measurement resolution (Internal gate average count)	SGL gate	100ns～1ms
Measurement resolution (Internal gate average count)	1～24 24～2,499 2,500～249,999 250,000～24,999,999 25,000,000 or more	100ns 10ns 1ns 100ps 10ps

Measurement error

The reference oscillator accuracy is the temperature characteristic of the reference oscillator.

Time intervalA→B (T.INT A→B)

・Minimum time interval : 6ns

・Maximum repetition frequency : 80MHz

Measurement range and resolution

		Specifications
Reference time		100ns
Measurement range	SGL gate	100ns～109,951s
Measurement range	Internal (1 ms to 10s) gate	100ns to approx. 1/2 gate time
Measurement resolution (Internal gate average count)	SGL gate	100ns～100μs
Measurement resolution (Internal gate average count)	1～24 24～2,499 2,500～249,999 250,000～24,999,999 25,000,000 or more	100ns 10ns 1ns 100ps 10ps

Measurement error

・The reference oscillator accuracy is the temperature characteristic of the reference oscillator.

Frequency ratio A/B (FREQ A/B)

Measurement range and resolution

		Specifications
Input signal frequency range		Both CH-A and CH-B are the same as FREQ-A
Measurement range	Internal gate(1ms～10s)	1E^-9～1E⁺⁹
Measurement resolution	Internal gate(1ms～10s)	1 + LOG (CH-A input frequency x gate time) digits

Measurement error

Phase measurementA→B (PHAS A→B)

・Minimum time interval : 6ns

・Maximum repetition frequency : 80MHz

Measurement range and resolution

		Specifications
Reference time		100ns
Measurement range	SGL gate	0.1µs～359.999,999,9[º]
Measurement range	Internal gate	10µ～359.999,99[º]
Measurement resolution (Internal gate average count)	SGL gate	100ns/input cycle × 360[º]
Measurement resolution (Internal gate average count)	1～24 24～2,499 2,500～249,999 250,000～24,999,999 25,000,000 or more	100ns/input cycle × 360[º] 10ns/input cycle × 360[º] 1ns/input cycle × 360[º] 100ps/input cycle × 360[º] 10ps/input cycle × 360[º]

Measurement error

Addition counting measurement(TOT-A)

	Specifications
Minimum response pulse width	2.5ns
Input frequency range	Same as FREQ-A
Measurement range	Counts from 0 to 4,294,967,295 when the scaling operation is OFF
Measurement error	±1 [count] (only when the gate is opened and closed)

Peak voltage measurement

The voltage amplitude of the CH-A or CH-B measured signal is measured and displayed in real time.

		Specifications
Measurement frequency		150Hz ≤ Input frequency ≤ 50MHz
Measurement speed		2 seconds or less
Measurement range	ATT OFF	-2.50V to +2.50V (10mV resolution)
Measurement range	ATT ON	-50.0V to +50.0V (100mV resolution)
Measurement error	ATT OFF	10% ±50mV of displayed value (for sine waves)
Measurement error	ATT ON	No specification

CH-A/B input terminal

			Specifications
Maximum input voltage			200V(DC+ACpeak)
Impedance			Approx. 1MΩ//20pF or less
Coupling			AC or DC
Low pass filter			None or 10kHz
Attenuator			None or 26dB (1/20)
Trigger level	Measurement range	ATT OFF	-2.50V to +2.50V (10mV resolution)
	Measurement range	ATT ON	-50.0V to +50.0V (100mV resolution)
	Measurement accuracy (0～+40ºC)	ATT OFF	10% ±30mV of the set value (however, +2 to -2V is ±3%)
	Measurement accuracy (0～+40ºC)	ATT ON	10% ±300mV of the set value (however, +40 to -40V is ±3%)
Operating range		ATT OFF	-2.50V～+2.50Vpeak
Operating range		ATT ON	-50.0V～+50.0Vpeak
nput sensitivity	Manual trigger	ATT OFF	30mVrms(DC～230MHz)
	Manual trigger	ATT ON	0.6Vrms(DC～230MHz)
	Auto trigger	ATT OFF	200mVrms (10kHz to 230MHz for sine waves)
	Auto trigger	ATT ON	4mVrms (10kHz to 230MHz for sine waves)

Measurement error

10MHz STD IN

BNC terminal for inputting more stable reference frequencies from the outside.

	Specifications
Input frequency	10MHz±50Hz(±5ppm)
Input amplitude	1Vrms～5Vrms Threshold = 0V
Input resistance	Approx. 6.4kΩ
Input coupling	AC

10MHz STD OUT /(MARKER OUT)

BNC terminal for outputting internal reference oscillator or marker signals.
A marker signal is a signal assuming the luminance modulation (Z axis) of the analog oscilloscope.
It is valid when the function is the SGL gate of the time interval (T.INT A→B) and phase (PHAS A→B), and the period from the start of the CH-A measurement to the start of the CH-B measurement is output = L.

	Specifications
Output	CMOS level
Reference frequency output	The 10MHz stability is the same as the standard transmitter on the main unit
Marker output	Bandwidth 5MHz Output L for the actual measurement period.

Output interface

	Specifications
RS-232	Standard equipment
GPIB	Factory option(SC-701)
Digital I/O	Factory option(SC-702)

Environmental conditions

Preheating time：At least 60 minutes
Operating temperature/humidity 0ºC to +40ºC/85% R.H or less (no condensation)
Storage temperature/humidity -20ºC to +60ºC/90% R.H or less (no condensation)

Reference oscillator

Equipped as standard. Can be output to the 10MHz OUT BNC terminal on the rear of the main unit.

Oscillation frequency 10MHz
Temperature characteristics ±2.5ppm/equipment ambient temperature 0ºC～+40ºC
Change over time ±1.0ppm/year

Change in power supply conditions and power supply voltage (factory option)

Power supply voltage 100VAC ±10%
Change in power supply voltage (factory option)：110～120V or 220～240V
Power supply frequency 50Hz, 60Hz, 400Hz
Power consumption 31VA MAX (at 100VAC with optional SC-701 and SC-702)

Size, mass

Size：Approx. 210W × 99H × 353L mm (excluding options and protruding parts)
Mass：4.0kg or less (when equipped with optional SC-701, SC-702, SC-703A)

Accessories

Power cord (1), Instruction manual (CD-ROM) (1), User’s Guide (1)

FAQ

Please click below for FAQs regarding this product.If your questions are not resolved by the FAQs, please contact us via email using the “Inquiries” link above.

FAQ