Meco 27-AUTO Instruction Manual

DIGITAL CLAMP METER
MODEL : 27-AUTO/27T-AUTO
INSTRUCTION MANUAL
1
Range Accuracy
2A ±(3% rdg + 5 dgt)
20A ±(2% rdg + 3 dgt)
200A
±(2% rdg + 5 dgt)
400A
DC VOLTAGE (Auto Ranging)
Range Accuracy
600V ±(0.8% rdg + 3 dgt)
AC VOLTAGE (Auto Ranging) 50-60Hz
Range Accuracy
600V ±(1.2% rdg + 3 dgt)
RESISTANCE (Auto Ranging)
Range Accuracy
20MV V V V V ±(1.2% rdg + 3 dgt)
Continuity Check
Threshold Level : 40V Approx.
Response Time : 1m Sec. Approx.
Open Circuit Voltage : 0.4V Approx.
Indication : ' ' is displayed on LCD and buzzer sounds
at continuity.
Diode Test
Measurement Current : 1.0 ± 0.6 mA Approx.
Open Circuit Voltage : 1.6V Approx.
3
®
Overload Protection
400A AC Max.
for 1 minute
Overload Protection
600V DC / AC rms
Overload Protection
600V DC / AC rms
Overload Protection
250V DC / AC rms
1. SPECIFICATIONS
1.1 General Specification
Display 3½ digit liquid crystal display (LCD) with a
n
maximum reading of 2000 counts.
Polarity Automatic, positive implied, negative polarity
n
indication.
Overrange (OL) or (-OL) is displayed.
n
Zero Automatic.
n
Low battery "
n
indication voltage drops below the operating level.
Measurement 3 times per second, nominal.
n
rate
Operating 0°C to 50°C at < 70% relative humidity.
n
Environment
Storage -20°C to 60°C, 0 to 80% R.H. with battery
n
Temperature removed from meter.
Accuracy Stated accuracy at 27
n
<75% relative humidity.
Power Two 1.5V 'AAA' Size Battery
n
Battery life 200 hours typical
n
Dimensions 185 x 65 x 28mm (approx.)
n
Weight 170gms including battery (approx.)
n
Accessories Pair of test leads x 1, Instruction manual x 1,
n
1.5V batterys (installed) x 2,
Carring Case x 1, (K type thermocouple upto
260
0
Maximum Jaw 25mm
n
Opening
Temperature (27T-AUTO only)
Range : -20 0 C to 750
-4 F to 1400
0
Accuracy : ± (3% rdg + 5 dgts)
Resolution : 1 0 C / 1
Sensor : K type thermocouple
2.1 Current Measurements
1. Set the Range switch to the highest 400A range.
2. Press the trigger to open transformer jaws, clamp onto one
conductor only and release trigger. Jaws should be completely
closed. Read the current directly on the display. It is
recommended that the conductor be placed at th e center of
the closed jaws for maximum accuracy (Fig. - 1).
27-27T : 28-09-2012
" is displayed when the battery
0 C ± 5 0 C,
C for 27T-AUTO only) x 1
0 C
F
0
0 F
2
4