HP 428B Clip-on Dc Milliammeter

Description

Specifications:

• Current Range : : 1 mA to 10 A full – scale, nine ranges.
• Accuracy: : ± 3% of full – scale ± 0.15 mA, from 0°C to 55°C. (When instrument is calibrated to probe).
• Probe Inductance: : Less than 0.5 μH.
• Probe Induced Voltage: : Less than 15 mV peak (worst case at 20 kHz and harmonics).
• Output: :Variable linear output level with switch position for calibrated 1 V into open circuit (corresponds to full – scale deflection). 1.5 V Max. into open circuit in uncalibrated position. 0.73 ± .01 V into 1 k Ω in calibrated position.
• Noise: : 1 mA Range, < 15 mV rms across 1 k Ω . 3 mA Range, < 5 mV rms across 1 k Ω . 10 mA thru 10 A Ranges, < 2 mV rms across 1 k Ω .
• Frequency Range : : DC to 400 Hz (3 dB point).
• AC Rejection: : Signals above 5 Hz with peak value less than full – scale affect meter accuracy less than 2% . (Except at 40 kHz carrier frequency and its harmonics). On the 10 A range, ac peak value is limited to 4 A.
• Probe Insulation: : 300 V Max.
• AC Power: : 115 or 230 V ±10%, 50 to 60 Hz, 71 W.
• Operating Temperature: : – 20°C to + 55°C.
• Cabinet Mount: : 7 ½ ” wide, 11 ½ ” high, 14 ½ ” deep (190,5 x 292,1 x 368,3 mm
• Weight: :
  Cabinet Mount: Net 19 lbs (8,6 kg);
  shipping 24 lbs (10,9 kg).
  Rack Mount: Net 24 lbs (10,9 kg); shipping 35 lbs 15,9 kg).