1. SPECIFICATIONS
1.1 General Specifications
Display: 3 ½ digit liquid crystal display (LCD) 20mm
height with a maximum reading of 1999.
Over range Indication : (1) or (-1) is displayed at MSD
Low Battery : Displayed when the battery voltage drops is low.
Safety standard : Meets the requirement of IEC 1010 for installation
category II, 1000V phase to earth.
Measurement rate: 2.5 measurements per second.
Operating condition : 0°C to + 50°C, 0-75% RH
Storage conditions : -20°C to + 60°C, 0-80% RH with battery removed.
Accuracy : ± (3% rdg + 2dgt ) Accuracy specifications at 23±
5°C, less than 75% RH.
Power Supply : 9 volts (6 x 1.5V) battery, Eveready type 1015 or
equivalent. OR Power Adaptor 9V, 1.5 A
Dimensions: 139 x 99 x 54mm (approx)
Weight : 395gms including battery, Eveready type 1015 or
equivalent.
Accessories : Test leads (pair) X 1, 1.5V battery (installed) X
carrying case X 1.
Dielectric Strength : 3.5kV @ 50Hz for 1 min. between input terminals
and case.
Insulation Resistance : More than 50MΩ at 500V between circuit and case.
1.2 Electrical Specifications
2. SAFETY INFORMATION
1. The circuit under test must be de energized and isolated before
connections are made.
2. Circuit connections must not be touched during a test.
3. After insulation tests capacitive circuits must be allowed to be
discharged.
4. Test leads must be in good order, clean and have no cracked or
broken insulation.
5. Do not push the test button before all connections and preparations
are done. The instrument must only be used by suitable trained and
competent persons.
Warning and safety symbols Caution refer to this
manual before using the meter. Dangerous
voltages. C€ Comply with IEC1010 – 1.
Digital Insulation Tester
Model: DIT-90
1
Accuracies are ±(% reading plus number of digits) at 23 ± 5°C, and
humidity of less than 75% RH
Model NO.
1000V
□
DIT-90A
□
DIT-90B
□
DIT-90C
□
DIT-90D
□
DIT-90E
1000V
500V
500V
2000MΩ
200MΩ
2000MΩ 200MΩ
1MΩ
0.1MΩ
1 MΩ
0.1 MΩ
100V
200MΩ
0.1 MΩ
Rated Voltage
Range
（
MAX.
）
Resolution
Max. No. load
Voltage
± 25% of rated voltage
<2 mA
± (3%rdg + 2dgt)
Short Circuit
Current
Accuracy
