Amprobe AD105A Clamp-Meter - Manual (Page 7)

4
AC Current (40 – 400 Hz; autoranging)
Range Resolution Accuracy:
0 to 40 A 0.1 A ±(1.9 %rdg + 8 dgt)
40 A to 400 A 0.1 A ±(1.9 %rdg + 7 dgt)
400 A to 1000 A 1 A ±(2.9 %rdg + 5 dgt)
AC Conversion Type: AC conversions are ac-coupled, true rms responding,
calibrated to the rms value of a sine wave input. Accuracies are given for
sine wave at full scale. For distorted signals, add the following corrections:
for Crest Factor of 1.4 to 2.0, add 1.0 % to accuracy.
for Crest Factor of 2.0 to 2.5, add 2.5 % to accuracy.
for Crest Factor of 2.5 to 3.0, add 4.0 % to accuracy (0 – 400 A).
Frequency Counter
Range Resolution Accuracy:
4 KHz 1 Hz ±(0.5 %rdg + 3 dgt)
10 KHz 10 Hz ±(0.5 %rdg + 3 dgt)
Min. Input Frequency: 20 Hz
Sensitivity at 1 kHz to 10 kHz: 10 A RMS (<1 kHz: 6 A RMS)
Peak Hold
Range Resolution Accuracy:
LOW 0.1 A ±(3.0 %rdg + 10 dgt)
HIGH 1.0 A ±(3.0 %rdg + 10 dgt)
Troubleshooting
If there appears to be a malfunction during the operation of the meter, the
following steps should be performed in order to isolate the cause of the
problem:
1.
Check the battery.
2. Review the operating instructions for possible mistakes in operating
procedure.
3. Check clamp against a known current source.
Except for the replacement of the battery, repair of the clamp should be
performed only by a Factory Authorized Service Center or by other
qualified instrument service personnel.
Front panel and case can be cleaned with a mild solution of detergent and
water. Apply sparingly with a soft cloth and let dry completely before
using. Do not use aromatic hydrocarbons or chlorinated solvents for
cleaning.
Battery Replacement
This instrument is powered by a single 9 V battery. Use the following
procedure to replace battery.
Turn the instrument off.
Position instrument face down, remove the two screws and lift off
back of case.
Replace battery, route wire away from top of battery and reassemble
case.