GENERAL ORDERING INFORMATION:
Specify Meter Color & Digit Size, Meter Power and a Signal Conditioner from the list below. Specify Analog Output, Setpoint Output and Digital Interface if needed. These meters are shipped with a standard configuration and range shown below for each signal conditioner and output option type. All information for making changes is covered in the supplied Owners Manual. For other scalings or configurations, add the SC (Special Configuration) option.
DESCRIPTIONS:
The Micro time interval meter can display pulse width or time delay between individual pulses. It can also display average pulse width or average time delay between multiple pulses.
Time interval is measured between inputs on channels A and B. Timing starts when a pulse is applied to Channel A (selectable positive or negative edge), and ends when a pulse is applied to Channel B (selectable positive or negative edge). In case of a single pulsed signal, the A and B inputs can be tied together. A positive or negative slope may be selected to start timing, and the opposite slope must be selected to stop timing. Timing is achieved by counting 5.5 MHz clock pulses. Multiple integral time intervals are averaged over a gate time which is selectable from 10 ms to 199.99 s and also controls the display update time.
The Micro time interval meter uses the FR dual-channel signal conditioner board and the standard (non-extended) counter main board.
You must be logged in to post a review.
The Micro time interval meter can display pulse width or time delay between individual pulses. It can also display average pulse width or average time delay between multiple pulses.
Time interval is measured between inputs on channels A and B. Timing starts when a pulse is applied to Channel A (selectable positive or negative edge), and ends when a pulse is applied to Channel B (selectable positive or negative edge). In case of a single pulsed signal, the A and B inputs can be tied together. A positive or negative slope may be selected to start timing, and the opposite slope must be selected to stop timing. Timing is achieved by counting 5.5 MHz clock pulses. Multiple integral time intervals are averaged over a gate time which is selectable from 10 ms to 199.99 s and also controls the display update time.
The Micro time interval meter uses the FR dual-channel signal conditioner board and the standard (non-extended) counter main board.
Time interval can be displayed in seconds, milliseconds, or microseconds with 6-digit resolution. In the typical application, time is displayed in milliseconds with 1 µs resolution. For times less than 100 ms, display resolution down to 0.2 µs can be achieved by applying a multiplier of 10, moving the decimal point by one position, and averaging many time intervals.
The dual-channel signal conditioner used for pulse detection accepts inputs from proximity switches with PNP or NPN output, TTL or CMOS logic, magnetic pickups, contact closures, and other signals from 12 mV to 250 Vac. Jumper selections provide optimum operation for different sensor types and noise conditions.
A built-in isolated 5, 10, or 24 Vdc excitation supply can power proximity switches and other sensors, and eliminate the need for an external power supply.
Plug-in isolated analog output, dual setpoint controller, and RS232/485 serial communications boards can upgrade the Micro and Mighty Series time interval meters from a stand-alone display to system interface and control. In particular, the meters can output an isolated 4-20 mA signal which tracks elapsed time.
Micro Series meters can be powered from 95-240 Vac ±10% and 95-370 Vdc, or optionally from 12-34 Vac and 10-48 Vdc. Any setup functions and front panel keys may be locked out for simplified usage and security. The popular 1/8 DIN version with 0.56″ high digits is environmentally sealed to NEMA-4X (IP65) from the front when panel mounted, and is available with red or green LEDs. All power and signal connections are via plug-in screw-clamp connectors.
Display | |
Readout | 6 digits, 7-segment |
Digit Height | Available with 0.56", 1.0", 4.0" or 5.0" digits. |
Color | High brightness red. Green available with 0.56" digits. |
Range | -999999 to +999999 |
Indicators | Four LED lamps |
Inputs | |
Types | AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups |
Grounding | Common ground for channels A & B |
Channel A Frequency | 0.005 Hz to 1 MHz |
Channel B Frequency | 0.005 Hz to 250 kHz |
Selectable Hysteresis | -12 mV to +12 mV, +30 mV to +60 mV, -30 mV to -20 mV, |
-150 mV to +150 mV, +350 mV to +600 mV, -600 mV to -350 mV, | |
-1.15 V to +1.15 V, +1.25 V to +2.1 V, -2.1 V to -1.25 V | |
Rolloff Filter | Selectable: 1 MHz, 30 kHz, 250 Hz. |
Debounce Time | Selectable: 0, 3, 50 ms |
Time Interval Mode | |
Timing Start | Channel A pulse, + or - edges |
Timing Stop | Channel B pulse, + or - edges |
Periodic Timing | Gate time + 30 ms + 0-2 time intervals |
Interval | Selectable 10 ms to 199.99 s |
Gate Time | Selectable 10 ms to 199.99 s |
Timeout | Same as periodic timing interval |
Resolution | |
0 - 199.999 s | 1 ms |
0 - 99.9999 s | 100 µs |
0 - 9.99999 s | 10 µs |
0 - .999999 s | 1 µs |
0 - .099999 s | 0.2 µs |
Accuracy | |
Time Base | Crystal calibrated to ±2 ppm |
Span Tempco | ±1 ppm/°C (typ) |
Long-term Drift | ±5 ppm/year |
Power | |
Voltage, std. | 95-240 Vac ±10% and 95-370 Vdc |
Voltage, opt. | 12-34 Vac and 10-48 Vdc |
Frequency | DC or 49-440 Hz |
Power isolation | Safety-rated to 250 Vac, meter ground to earth ground, |
DC to 60 Hz, 4.2 kVp per High Voltage Test |
Excitation Output | |
5 Vdc | 5 Vdc ±5%, 100 mA max |
10 Vdc | 10 Vdc ±5%, 120 mA max |
24 Vdc | 24 Vdc ±5%, 50 mA max |
Output isolation | 50 Vdc to meter ground |
Environmental | |
Operating | 0°C to 60°C |
Temperature | -40°C to 85°C |
Storage Temperature | 95% at 40°C, non-condensing |
Relative Humidity | NEMA-4X (IP-65) when panel mounted |
Protection |
Electrical Connections |
![]() |
The start and stop pulses used for timing can be generated by the dual relay board in a Micro panel meter or digital counter. For instance, the start and stop pulse edges can be created as temperature passes two alarm setpoints, or temperature cycles in a hysteresis control mode.
An oscilloscope is great for viewing and timing pulses in a lab. However, in fixed installations where digital timing accuracy and control outputs are required, a low-cost Micro time interval meter will be the instrument of choice. Resolution to 0.2 µs is feasible.
© 2022 Electro-Numerics. All Rights Reserved. Privacy Policy. Website by Mathis Consulting LLC | Developed by Cebu Web Maker
Reviews
There are no reviews yet.