Compact digital multimeters CAT III HT15D is a compact digital multimeter capable mainly of measuring AC/DC voltage up to 600 V and DC current up to 10 A (HT15D), with additional functions such as resistance measurement, circuit integrity testing, diode testing, and testing 9V and 1.5V alkaline batteries. These devices are designed according to IEC/EN61010-1 safety standards with double insulation in CAT III 600V class. They feature a wide backlit LCD display, and each function can be selected via a dedicated switch. An additional feature is the Data HOLD function for locking data on the display and REL for relative measurements.