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| DIGITAL METERING INSTRUMENTS | |
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Is there an inexpensive solution to monitor and signal overvoltage or overload conditions in a system? |
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The  series DMK75R1 is a multimeter, in a modular housing of a 3-module size, equipped with display for viewing mains voltage values and the current and power values consumed by the system. The measurements are TRMS values and consent to have accurate readings even in presence of harmonic loads.In addition, the multimeter is equipped with a digital output, which can be simply and instantaneously programmed to provide for the setting of minimum and maximum thresholds, related to the three measurements, and signalling of eventual alarm conditions to external devices. |
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Can traditional analog metering instruments, such as voltmeters and ammeters, be replaced by digital metering equipment? |
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The three-phase DMK70 voltmeter and DMK71 ammeter can replace both the analog instruments and eventual voltmeter and/or ammeter
switches. The DMK70 and DMK71 installation has the following advantages as well: - Reduced space – 3 modules instead of 6 - Reduced installation and wiring costs - Increased measure accuracy, even in presence of harmonic content of the controlled system. |
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Can a digital multimeter record the operating hours of a system? |
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This type of monitoring can be achieved by using one of the LOVATO Electric digital multimeter types DMK20, DMK25, DMK26 and DMK50. The hour counters for the operating hours can be enabled by one of the following conditions:  When a voltage
threshold, programmable by internal parameter Voltage Threshold to activate the hour
counter, is exceeded. When a current
threshold, programmable by internal parameter Current Threshold to activate hour
counter, is exceeded. When both
thresholds, programmable by internal parameters mentioned above, are
exceeded. At power up, whenever no voltage or current threshold has been programmed.The hour counters can be cleared, at any time, by pressing the specific combinations of keys. |
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Is it possible to connect a PC with a multimeter, like our DMK 22, DMK 52, DMK 32, DMK 62 or DMK 40 model, with a serial port using a Ethernet converter? |
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There are two different
methods to obtain this type of communication whenever the LOVATO
Electric DMK devices and the relative supervision software are
used: 1. Using the suitable driver supplied with the Ethernet/serial port converter drive, one can generate a virtual serial port on the drive itself, positioned at a great distance from the PC. With this mode and selecting the virtual COM instead of the PC serial port, with the DMK Supervision software (e.g. COM1 will be the PC port while COM3 the virtual driver generated port), all of the multimeters connected will refer to the virtual port only. 2. The second method consists of a direct communication between the PC and the converter drives, without the use of drivers for the virtual COMs. This solution requires a specific IP address and port number for each multimeter, to be programmed and identified using the DMK Supervision software. This consents to use more than one converter simultaneously obtaining major flexibility for the multimeter locations. |
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Is there an instrument capable of automatically storing electrical parameters? How long can it store data without the need of a personal computer? |
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The
Lovato Electric digital multimeter, DMK40 type, is designed with a
2Mb memory During the data logger configuration, that is when programming via software the relative parameters to log and store, the exact time needed to completely fill its internal memory can be consulted. The option “Stop acquisition with full memory” consents to stop all logging when the memory is full or to refresh oldest data with new one. |
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Can an alarm be generated by a digital multimeter when the value of consumed power of a system is higher than the prefixed threshold limit? |
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Our
digital multimeters DMK31, DMK32, DMK61 and DMK62 can be programmed
for such alarm since they are equipped with two independent
programmable digital outputs; each can be configured with one of its
250 monitored measures. To enable the consumption control of the system, one of the two outputs must be configured to active power - Watt - and then programmed as maximum or minimum and maximum threshold function, of four available (minimum or maximum or minimum and maximum thresholds or energy meter) to control when the maximum limit is exceeded. The following parameters can also be set: - Power threshold limit over which the alarm is tripped and tripping delay time - Automatic alarm resetting threshold and the relative delay time. |
