APPA APPA-31 Reference manual

APPA TECHNOLOGY CORP.
5F. 233-1 Pao-Chiau Rd., Shin Tien,
Taipai , 23115, Taiwan, R.O.C.
P.O.Box. 12-24 Shin-Tein ,
Taipai, Taiwan
Tel : [phone]
Fax : [phone]
Copright 1995, APPA Tech., Corp. All rights reserved.
1
INTRODUCTION
1-1 Unpacking and Inspection
Upon removing your new current transducer
from it's packing , you should have the
following items:
1. Current Transducer with coiled cable out
put plugs.
2. Instruction manual.
3. Carrying Case.
1-2 Front View
Refer to Figure 1 and the following numbered
steps to familiarize yourself with the trans-
ducer.
1. Transformer Jaws — Designed to pick
up the a.c. current following through the
conductor.
2. Hand Guard —Designed to protect user
for safety.
3. Trigger —Press the lever to open the
transformer jaws.

2
RED BLACK
Figure 1
APPA-31
AC Current Transducer

OPERATOR’S
MANUAL

6
OPERATION
AC Current Measurement
1. Set the DMM at ACV Function and proper
range.
2. Connect the plug of transducer with DMM
firmly.
3. Press the trigger to open transformer jaws
and clamp one conductor only, making
sure that the jaw is firmly closed around
the conductor and reading the result from
the digital display of DMM.
MAINTENANCE
To keep the instrument clean , wipe the case
with a damp cloth and detergent , do not use
abrasives or solvents.
Any adjustment , maintenance and repair
shall be conducted by a service personnel.
3
Meter Safety
Terms marked on Equipment.
ATTENTION — Refer to Manual.
DOUBLE INSULATION — Protection
Class II.
DANGER - Risk of electric shock.
Symbols in this Manual
This symbol indicates where cautionary
or other information is found in the manual.
SPECIFICATIONS
Current Range :0.1A to 400A a.c. RMS.
Output Voltage :1mV a.c. per 1Amp a.c.
Working Voltage : 600V CAT. II per IEC
1010-1
Maximum Altitude : 2000m
Operating Temperature : 0℃to 45℃<75%
R.H.
Storage Temperature : -20℃~ 60℃

4
Type of Sensing : Induction coil sensing
for AC current.
Temperature Coefficient : 0.2x(Spec Acc'y)/
℃, < 18℃or > 28℃
Maximum Output Impedance : 75Ω.
Maximum Jaw Opening : 30mm.
Maximum Conductor Size : 29mm diameter.
Size : 72mm (W) x 148mm (L) x 36mm(D)
W/O cable.
Weight : 250grams.
Indoor use.
Maximum Altitude : 2000 meter.
Accessories : Manual , Carrying Case.
Precautions and Preparations for
measurement
1. Do not apply the voltage to the output plugs.
2. Do not use or store this instrument in a
high temperature or high humidity
environment and do not store the unit in
direct sunlight.
5
3. Do not measure current before the unit
is not combined with DMM.
4. If the instrument is used near noise gen-
erating equipment , be aware that output
voltage may become unstable or get more
errors.
THIS INSTRUMENT MUST NOT BE
USED ON UNINSULATED CONDUCT-
ORS AT A VOLTAGE GREATER THAN
250V ac/dc.
Electriacl Specification
Accuracy is ±(%reading + number of
Ampere) at 23℃±5 ℃, less than 75% R.H.
Range Measure Output Accuracy
400A
3Amp 3mV
30Amp 30mV
350Amp 350mV
400Amp 400mV ±(3.2% + 1A)
50 ~ 60Hz
±(1.9% + 0.5A)
50 ~ 60Hz