Technical data

144 U1401A User’s and Service Guide
8 Specifications
General Specifications
Display
• Both primary and secondary displays are 5-digit liquid crystal display (LCD)
with a maximum reading of 51,000 counts and automatic polarity indication.
Power Consumption
• Charging battery: 9.3 VA typical
• DC constant current at 25 mA, maximum load: 5.5 VA typical (on 24 V DC adapter) or
2.4 VA typical (on 9.6 V batteries)
• Meter only: 1.8 VA typical (on 24 V DC adapter) or 0.6 VA typical (on 9.6 V batteries)
Power Supply
• Rechargeable batteries — 1.2 V × 8 pieces (Ni-MH), no cadmium, lead or mercury.
• External switching adapter, AC 100 V to 240V, 50/60 Hz input and DC 24 V/2.5 A output.
Operating Environment
• Full accuracy at 0 °C to 40 °C (32 °F to 104 °F)
• Full accuracy up to 80% Relative Humidity (RH) for temperature up to 31 °C, decreasing
linearly to 50% RH at 40 °C
Storage Compliance
• –20 °C to 60 °C (–4 °F to 140 °F) with batteries removed.
Safety Compliance
• IEC 61010-1:2001/EN61010-1:2001 (2nd Edition)
• Canada: CAN/CSA-C22.2 No. 61010-1-04
• USA: ANSI/UL 61010-1:2004
Measurement Category
• CAT-II 150V, Pollution Degree 2 Environment.
EMC Compliance
• IEC61326-2-1:2005/EN61326-2-1:2006
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
Measurement
• 3 times per second (AC+DC: 1 time per second)
• 1 time per second for frequency or duty cycle measurement. (>1 Hz)
• 0.25 to 1 time per second for Pulse Width measurements. (>1 Hz)
Common Mode Rejection Ratio (CMRR)
• > 90 dB at DC, 50/60 Hz ± 0.1% (1 kΩ unbalanced)
Normal Mode Rejection Ratio (NMRR)
• > 60 dB at DC, 50/60 Hz ± 0.1%
Temperature Coefficient
• Input: 0.15 * (specified accuracy)/ °C (from 0 °C to 18 °C or 28 °C to 40 °C)
• Output: ± (50ppm output + 0.5dgt)/ °C