User`s guide

5 Characteristics and Specifications
Product Characteristics
134 U1273A/U1273AX User’s Guide
Product Characteristics
POWER SUPPLY
Battery type:
• 4 × 1.5 V Alkaline batteries (ANSI/NEDA 24A or IEC LR03) — included with
U1273A,
• 4 × 1.5 V Lithium Iron Disulfide batteries (ANSI/NEDA 24LF or IEC FR03) —
included with U1273AX, or
• 4 × 1.5 V Zinc Chloride batteries (ANSI/NEDA 24D or IEC R03)
Battery life:
• Based on new Alkaline batteries for DC voltage measurement:
• 30 hours typical at high brightness
• 45 hours typical at medium brightness
• 60 hours typical at low brightness
• Based on new Lithium batteries for DC voltage measurement:
• 50 hours typical at high brightness
• 100 hours typical at low brightness
• Low battery indicator will flash when the battery voltage drops below
• For non-rechargeable batteries: 4.4 V (approximately)
• For rechargeable batteries: 4.5 V (approximately)
POWER CONSUMPTION
180 mVA maximum (with maximum brightness)
FUSE
• 10 × 35 mm 440 mA/1000 V fast-acting fuse
• 10 × 38 mm 11 A/1000 V fast-acting fuse
DISPLAY
Organic LED (OLED) (with maximum reading of 33000 counts)
INPUT IMPEDANCE AT OFF MODE
1.67 kΩ (protected by positive temperature coefficient resistor)
OPERATING ENVIRONMENT
• Operating temperature from
• U1273A: –20 °C to 55 °C, 0% to 80% RH
• U1273AX: –40 °C 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