The photoelectric sampler is an instrument specially used to measure optical pulse signals. Its basic principle is to use photodiodes or photomultiplier tubes to convert optical signals into electrical signals, and then use digital signal processing technology for signal processing and analysis.

It can be interfaced with the electric energy meter calibrator to calibrate the electric energy meter and verify whether the pulse output of the electric energy meter is accurate.

Photoelectric samplers are divided into field type and pole type. The field type is suitable for on-site testing of installed electrical meters, and the pole type is suitable for testing on calibration meters.

(一)Advantages of the field type:
1).Overall power consumption is less than 13.5mA, it is specially suitable for handheld devices
2).Compatible with mechanical meter, electronic meter, three-phase meter, trigger switching, power failure memory working state
3).Automatically adapt to the changes of light and dark in the site,and can suppress the sudden interference of light
4).Manual switch function is conducive to fault point detection, quickly and efficiently determine the fault point
5).Super small body, big circle diameter is only 3cm
6).Mechanical strong suction cup structure, strong suction, more convenient disassembly
7).Status color indication, strong visibility
8).Sampling rate is up to 100Hz, fully meet the meter sampling requirement
9).Dedicated single chip design, stable and reliable work

(二)Advantages of pole type (Take DPF-500 as an example):
1).Overall power consumption is less than 13.5mA, specifically suitable for use with desktop calibrators
2).Compatible with mechanical meter, electronic meter and imported meter, power failure memory working state
3).Adopt a fully automatic intelligent sampling head,Automatically adapt to the changes of light and dark in the site,and can suppress the sudden interference of light
4).Ultra-high sensitivity, acceptance range 15~60mm, adaption angle greater than 15°
5).Professional single-chip design, stable and reliable operation
6).Ultra-large arc working environment light adaptation range
7).Status color indication, strong visibility
8).Manual switch function
9).Can realize TTL communication or 485 communication

Take DPF-370 as an example: 1).Working Voltage: DC4.5-6V
2).Working Current:13.5mA (The following parameters are measured at 5V power supply)
3).Power Consumption: ≤0.25W (when unloaded)
4).Sample Distance: 25-45mm
5).Output Signal: high level≥4.5V (with black mark)
low level≤0.2V (without black mark)
6).Output Current: 3mA-5mA
7).Anti-interference: deburring≤3.0mm
8).Sampling Rate: 100Hz

Take DPF-370 as an example:
1).Placing the scanning head in any position of checked meter dial.
2).Rotating the scanning head,to make the center of three spots aim at checked meter dial or pulse output light of electronic meter.
3).In right state and position,the scanning head will take samples automatically,without manual adjustment.
4).Switching working state: press the red reset button continuously for 1.5 seconds,then switch between manual switch status,mechanical meter status, and electronic meter status.
5).With manual switch function,the active light blinks in the state of manual switch. Pressing the RESET button once will trigger output a pulse.