AC Digital Ammeter - 0 to 150 A

The AC 8238-BSS digital ammeter is an instrument designed for precise monitoring of alternating current (AC). It measures amperage in a range of 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 installation of an external current transformer (CT) to measure AC current.

Before any installation or handling, it is imperative to cut all AC power sources, including generators, inverters, and shore power. For marine and RV installations, ensure you disconnect shore power or the battery bank and disconnect the DC power from the inverter. It is strongly recommended to have a qualified electrician perform the installation if you are not experienced with AC systems.

Yes, a current transformer (CT) with its wires open while primary current is flowing can generate lethal voltages. Never open the CT wires while in operation. If the ammeter must be removed, the CT wires must be short-circuited.

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

Since 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 is part of 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 that focuses solely on reading amperage. In contrast, the 8247 multimeter includes alarm functions and measures multiple parameters such as voltage, amperage, frequency, and power.

Pressing the device’s button cycles the display brightness. There are three brightness levels. Single-button models, like this one, also include a fourth standby mode where the display is off except for a single decimal point.

When powered on, the ammeter runs 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-volt single-phase system, or on 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. Alarm functions for high current, low voltage, and high voltage 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, especially when using limited shore power or generators. Excessive current can damage equipment or trip breakers. The 8238-BSS ammeter allows users to view electrical consumption in real time, optimizing the use of available onboard power 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 extreme 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 all AC sources, including inverters and generators, are powered off before making connections.

Yes, the 8238-BSS ammeter PCB is coated for 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 designed for use in wet environments or for outdoor installation without additional protection. It must be installed in a dry, protected location.