SR620 - Uncategorized SRS - Free user manual and instructions
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| Product Type | Universal Time Interval Counter |
| Brand | SRS (Stanford Research Systems) |
| Model | SR620 |
| Measurement Capabilities | Time interval, frequency, period, pulse width, duty cycle, phase, and event counting |
| Resolution | 1 ps (single-shot), 100 fs (averaged) |
| Input Frequency Range | DC to 200 MHz |
| Display | 2-line x 16-character alphanumeric LCD with backlight |
| Input Impedance | 50 Ω or 1 MΩ selectable |
| Time Base | Internal OCXO or optional rubidium; stability <5e-10 |
| Dimensions | 8.5 x 3.5 x 13 inches (216 x 89 x 330 mm) |
| Weight | 9.5 lbs (4.3 kg) |
| Power | 100-240 VAC, 50/60 Hz, 40 W max |
| Interface | GPIB (IEEE-488) and RS-232 |
| Operating Temperature | 0°C to 40°C |
| Storage Temperature | -20°C to 70°C |
| Maintenance | Periodic recalibration recommended; clean with a dry cloth |
| Safety | Complies with IEC 61010-1; use only specified power supply |
| Spare Parts & Repairability | Contact SRS for service; replaceable fuses and power cord |
| General Information | Includes manual, power cord, and GPIB cable; optional rack mount kit |
Frequently Asked Questions - SR620 SRS
How do I set the trigger level on the SR620?
Press the TRIG key, then use the numeric keypad to enter the desired trigger voltage. The trigger level can be adjusted in 1 mV steps.
What is the maximum input voltage for the SR620?
The maximum safe input voltage is ±5 V for the 50 Ω input and ±250 V for the 1 MΩ input (DC + peak AC).
How can I measure frequency with the SR620?
Select the FREQ measurement mode from the front panel. The gate time can be set from 1 ms to 1000 s for resolution adjustment.
Can I use the SR620 with a rubidium time base?
Yes, the SR620 can be ordered with an optional rubidium time base (SR620-RB). It provides improved stability (<1e-11 over 24 hours).
How do I perform a self-test on the SR620?
Press the MENU key, scroll to Diagnostics, and select Self-Test. The instrument will run a series of checks and display results.
What is the single-shot time interval resolution?
The single-shot resolution is 1 ps for time intervals. With averaging, the resolution can reach 100 fs.
How do I connect the SR620 to a computer?
Use the GPIB (IEEE-488) or RS-232 port. GPIB address is set via front panel menu (default 17). RS-232 baud rate is selectable up to 19200.
Can I measure pulse width with the SR620?
Yes, select PULSE WIDTH mode. The instrument measures from the first trigger to the second trigger on the same channel.
How often should I recalibrate the SR620?
SRS recommends annual recalibration. The internal OCXO ages about 5e-10 per year. Contact SRS or an authorized service center.
What does the 'ARM' function do?
The ARM function allows gated measurements. You can set an arm signal to enable or disable counting during specific intervals.
User questions about SR620 SRS
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USER MANUAL SR620 SRS
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Product information
Brand : SRS
Model : SR620
Category : Uncategorized