8

General Specifications

Display

– U1271A and U1272A: Liquid crystal display (LCD) (with maximum reading of

33,000 counts)

– U1273A/U1273AX: Organic LED (OLED) display (with maximum reading of

33,000 counts)

Power consumption

– U1271A/U1272A: 460 mVA maximum (with backlight enabled)

– U1273A/U1273AX: 180 mVA maximum (with maximum brightness)

Battery type

– 4 × 1.5 V Alkaline battery (ANSI/NEDA 24A or IEC LR03), or

– 4 × 1.5 V Zinc Chloride battery (ANSI/NEDA 24D or IEC R03)

– 4 × 1.5 V Lithium battery (ANSI/NEDA 24LF or IEC FR03)

Battery life

– U1271A and U1272A: 300 hours typical (based on new Alkaline batteries for DC

voltage measurement)

– U1273A/U1273AX:

– Based on new Alkaline batteries for DC voltage measurement:

30/45/60 hours typical at High/Medium/Low brightness, respectively

– Based on new Lithium batteries for DC voltage measurement:

50/100 hours typical at High/Low brightness, respectively

– Low battery indicator will flash when the battery voltage drops:

– For non-rechargeable batteries: 4.4 V (approximately)

– For rechargeable batteries: 4.5 V (approximately)

Fuse

– 10 × 35 mm 440 mA/1000 V 30 kA fast-acting fuse

– 10 × 38 mm 11 A/1000 V 30 kA fast-acting fuse

Input impedance at off mode

– 1.67 kΩ (protected by positive temperature coefficient resistor)

(U1272A, U1273A and U1273AX only)

Operating environment

– Operating temperature:

– U1271A/ U1272A/U1273A: –20 to 55 °C, 0% to 80% RH

– U1273AX: –40 to 55 °C, 0% to 80% RH (using Lithium batteries)

– Full accuracy up to 80% RH for temperatures up to 30 °C, decreasing linearly to

50% RH at 55 °C

– Altitude up to 3000 meters

– Pollution degree II

Storage compliance

–40 to 70 °C, 0 to 80% RH

Safety compliance

– CAN/CSA-C22.2 No. 61010-1-04

– EN/IEC 61010-1:2001

– ANSI/UL 61010-1:2004

Measurement category

CAT III 1000 V/CAT IV 600 V

Electromagnetic compatibility (EMC)

Commercial limits compliance with EN61326-1

Ingress protection rating

IP-54

Temperature coefficient

U1271A/U1272A/U1273A: 0.05 × (specified accuracy)/°C (from –20 to 18°C, or 28 to 55°C)

U1273AX: 0.05 x (specified accuracy/ °C (from –40 to 18°C, or 28 to 55°C)

Common Mode Rejection Ratio (CMRR)

> 120 dB at DC, 50/60 Hz ± 0.1% (1 kΩ unbalanced)

Normal Mode Rejection Ration (NMRR)

> 60 dB at 50/60 Hz ± 0.1%

Dimensions (W x H x D)

92 × 207 × 59 mm

Weight

– U1271A: 518 grams (with batteries)

– U1272A: 520 grams (with batteries)

– U1273A: 500 grams (with batteries)

– U1273AX: 500 grams (with batteries)

Warranty

– Three years for product

– Three months for product’s accessories

Calibration cycle

One year