1. The pointer table has poor reading accuracy, but the process of pointer swing is relatively intuitive, and the amplitude of the swing speed can sometimes objectively reflect the measured size (such as measuring the slight difference of the TV data bus (SDL) when transmitting data. Jitter); the digital multimeter reads intuitively, but the process of digital changes looks messy and not easy to watch.
2. There are generally two batteries in the pointer table, one low voltage 1.5V, one high voltage 9V or 15V, and the black test pen is the positive end relative to the red test pen. Digital multimeters often use a 6V or 9V battery. In the resistance file, the output current of the meter in the pointer table is much larger than that of the digital meter. With the R&TImes; 1 Ω file, the speaker can make a loud “beep†sound, and even the light-emitting diode (LED) can be illuminated with the R&TImes; 10kΩ file.
3. In the voltage file, the internal resistance of the pointer table is relatively small compared to the digital multimeter, and the accuracy of the measuring instrument is relatively poor. Some high-voltage micro-currents can't even be measured because their internal resistance will affect the circuit under test (for example, the measured value will be much lower than the actual value when measuring the acceleration stage voltage of the TV picture tube). The internal resistance of the digital multimeter voltage file is very large, at least in the megaohm range, and has little effect on the circuit under test. However, the extremely high output impedance makes it susceptible to induced voltage, and the data measured in some cases where electromagnetic interference is relatively strong may be virtual.
4. In short, the pointer table is used in the analog circuit measurement of relatively high current and high voltage, such as TV set and audio power amplifier. Digital meters, such as BP machines, mobile phones, etc., are used in the measurement of digital circuits with low voltage and low current. Not absolute, the pointer table and digital multimeter can be selected according to the situation.
Waterproof D-Sub Connector & D-SUB Adapter
IP66 / IP67 waterproof d-sub connectors-Designed for IP Performance
ANTENK has developed IP66 / IP67 waterproof d-sub connectors that utilize a proprietary sealing technology, which maintains the same physical size and footprint as standard d-sub products.
Antenk's line of Waterproof d-sub connectors utilize an innovative sealing technology eliminating the need to redesign enclosures and PC boards when implementing IP67 design upgrades.These connectors are designed for applications that require protection from heavy spray or are exposed to short-term submersion. Connectors are available in vertical and right angle board mount types as well as solder cup for panel mount cable applications. Standard D-Subs are available in 9 pin, 15 pin, and 25 pin positions, and high density D-Subs are available in 15 pin, 26 pin, and 44 pin positions
Applications of Antenk waterproof d-sub connectors:
Hand held computers, scanners, and printers that are used outdoors
Remote sensors, gauges, and data loggers that are used outdoors
Industrial and Medical equipment that is routinely subject to wash down
Transmitters and emergency beacons that are subject to temporary submersion
Gas, Electric, and Water metering systems that have embedded Smart Grid electronics
Portable electric generation equipment (Gen Sets)
Consumer and Commercial boating electronics (Radios, Scanners, Radar, DC Power Ports)
IP67 D-SUB | WATERPROOF CONNECTORS FEATURES & BENEFITS
Signal / Low Power in 6 standard size
(Standard: 9 pin, 15 pin, 25 pin | High Density: 15 pin, 26 pin,44 pin)
Combo-D / High Power in a variety of configurations:
(3W3, 5W5, 7W2, 9W4, 11W1, 13W3, 13W6, 17W2, 21W1, 21WA4)
Solder Cup, Vertical Mount & Right Angle Board Mount Options
High Reliability Screw Machined Contacts
3 amp / 5 amp / 20 amp / 40 amp Power Options
-65°C to +105°C Operating Temperature Range
Range of Antenk waterproof d-sub connectors
solder cup, stamped & formed contact D-sub waterproof
solder cup,machined contacts D-sub waterproof
vertical mount D-sub waterproof
right angle D-sub waterproof
IP67 rated Combo power D-sub waterproof
D-Sub adapters, couplers, and splitters
Solder Cup Waterproof D-Sub Connector,Vertical Mount Waterproof D-Sub Connector, Right Angle Waterproof D-Sub Connector,Combo Power D-Sub Waterproof D-Sub Connector,Waterproof D-Sub Connector,D-SUB Adapter,IP66/ IP67/IP68 Rated D-Sub Connectors
ShenZhen Antenk Electronics Co,Ltd , https://www.atkconnectors.com