MODEL

3321A

3322A

3323A

Insulation Resistance

DC Test Voltage

250V/500V/1000V

125V/250V/500V

25V/50V/100V

Max. Effective
Scale Value

50MΩ/100MΩ/2000MΩ

20MΩ/50MΩ/100MΩ

10MΩ/10MΩ/20MΩ

Mid-Scale Value

1MΩ/2MΩ/50MΩ

0.5MΩ/1MΩ/2MΩ

0.2MΩ/0.2MΩ/0.5MΩ

First Effective
Measuring Range 

Accuracy

0.05~20MΩ (250V) 
0.1~50MΩ (500V) 
2~1000MΩ (1000V)

0.02~10MΩ (125V)
0.05~20MΩ (250V)
0.1~50MΩ (500V)

0.01~5MΩ (25V)
0.01~5MΩ (50V)
0.02~10MΩ (100V)

|±5% of Indicated Value

Second Effective
Measuring Range

Accuracy

20~50MΩ (250V)
50~100MΩ (500V) 
1000~2000MΩ (1000V)

10~20MΩ (125V)
20~50MΩ (250V)
50~100MΩ (500V)

5~10MΩ (25V)
5~10MΩ (50V)
10~20MΩ (100V)

|±10% of Indicated Value

AC Voltage

600V

Accuracy

|±3% of Full Scale Value (AC V range)
|±5% of Full Scale Value (Except for AC V range)

Safety Standard

Withstand Voltage

5550V AC for 1 minute

Power Source

R6P (AA) (1.5V) × 6

Dimensions

105(L) × 158(W) × 70(D)mm

Weight

520g approx.

Accessories

7150A (Remote control switch set)
7081B (Guard Connection Lead): 3321A only
Shoulder Strap
R6P (AA) × 6
Instruction Manual

Optional

7115 (Extension Probe) 
8016 (Hook type prod)
9089 (Carrying Case)