Digitální střídavý ampérmetr 0–150 A

The CA 8238-BSS digital ammeter is an instrument designed for precise monitoring of alternating current (AC). It measures amperage in a range from 0 to 150 A, providing essential data for onboard energy management, particularly to prevent overloads when using shore power or generators.

The CA 8238-BSS digital ammeter can measure alternating current (AC) in a range from 0 to 150 amperes.

Yes, the 8238-BSS ammeter requires the installation of an external current transformer (CT) to measure AC current.

Before any installation or handling, it is imperative to disconnect all AC power sources, including generators, inverters, and shore power. For marine and RV installations, ensure the shore power or park power is unplugged and the DC power from the inverter is disconnected. It is strongly recommended to consult a qualified electrician if you are not experienced in AC device installation.

Yes, a current transformer (CT) with its wires open while primary current is flowing can generate deadly voltages. It is crucial never to open the CT wires while in operation. If the ammeter must be removed, the CT wires must be short-circuited without exception.

The ammeter must be installed in a location safe for high-voltage electrical connections, where the rear terminals cannot be touched. It must be placed in a visible position with easy access to the buttons. For better visibility, do not install it in direct sunlight. The location must be dry and protected. Although the front face is splash-resistant and the circuit boards are coated for corrosion resistance, it is not intended for use in wet environments or for outdoor installation without additional protection.

Given that the signal generated by the current transformer (CT) is very weak (for example, 10A of primary current would generate 10mA for a 100A CT), it is necessary to use a twisted-pair cable. This minimizes susceptibility to electrical noise and ensures measurement accuracy.

Yes, the 8238-BSS ammeter integrates into Blue Sea Systems' 8200 series. This series also includes other instruments such as the 8237 voltmeter, the 8239 frequency meter, and the 8247 multimeter.

The 8238-BSS ammeter is a single-function instrument focused solely on reading amperage. In contrast, the 8247 multimeter offers alarm functions and measures multiple parameters such as voltage, amperage, frequency, and power.

By pressing the device button, the display dims. There are three brightness levels. Single-button models, like this one, also have a fourth standby mode where the display is off except for a single decimal point.

When powered on, the ammeter performs a self-test sequence. During this sequence, all function LEDs light up to verify their proper operation.

Yes, the 8200 series meters can be used to measure current flow in both phases of a 240 V single-phase system, or in three- or four-wire systems. However, this requires the use of a switch specifically designed for this purpose.

To use multiple current transformers (CTs) with the 8200 series meters, a special switch is required. This switch must short-circuit the secondary of the CT, except when connected to the meter. Blue Sea Systems offers the panel and switch PN 8410 for 120/240V applications.

No, the 8238-BSS ammeter is a single-function instrument dedicated to current measurement and does not include alarm functions. High current, low voltage, and high voltage alarm functions are available on the 8247 multimeter in the same series.

Yes, all wiring, including that of the current transformer (CT), must be routed in safe, dry cable trays. It is also important to use appropriate strain relief devices to ensure connection safety and measurement accuracy.

Monitoring amperage is crucial to avoid overloads, particularly when using limited shore power or generators. Excessive current can damage equipment or trip circuit breakers. The 8238-BSS ammeter allows users to view real-time power consumption, optimizing the use of available onboard energy sources.

No, the CA 8238-BSS digital ammeter is a single-function instrument designed specifically to measure amperage (alternating current). To measure voltage or frequency, other instruments in the 8200 series, such as the 8237 voltmeter or the 8239 frequency meter, are required.

All electrical connections, especially high-voltage ones, must be made with the utmost care in an electrical panel environment. These connections must be properly fused as indicated in the wiring diagram (not included here). It is essential to ensure that all AC sources, including inverters and generators, are switched off before making connections.

Yes, the printed circuit boards of the 8238-BSS ammeter are coated to provide corrosion resistance, which is an advantage for marine applications.

No, although the ammeter’s face is splash-resistant and its circuits are coated for corrosion resistance, it is not intended for use in wet environments or for outdoor installation without additional protection. It must be installed in a dry, protected location.