Digital Insulation
Resistance Tester
OPERATION MANUAL
1. Summary
The Digital Insulation Resistance Tester series have high
performance, and safe configuration and improved electrocircuit.
It is one new item which has more fully function, higher precision,
and easier operation. It’s also one quakeproof, dustproof and
dampproof tester and can fit work environment of outdoor.
The output testing voltage can be changed between
100V/250V/500V/1000V/2500V/5000V for different item no. The
resistance can reach 200GΩ, the tester also can measure
alternating voltage.
This Tester apply for all kinds or electric equipment and
insulation materials such as transformer, electromotor, cable,
switch, appliance, etc.
It is a perfect electrical testing meter.
2. Safety Notice
(1) Read this Operation Manual carefully before use it.
(2) This meter is designed in accordance with IEC publication
1010, pollution degree II and installation category (over
voltage category) II.
(3) Should not use it before close the back lid cause of the
danger of electroshock.
(4) Check the insulation layer of the test pin lead.
(5) Don’t rotate switch when testing.
(6) When seeing “
” on the LCD, means the battery voltage is
low. Please replace the battery or charge the battery by the
battery charger to insure accurately testing.
3. Electric Symbols
Important hint
Care for high voltage
Double insulation
Low battery
V
AC voltage
Ground
(maximum permitted voltage between terminal
and ground).
4. Feature
(1) Low power consumed CMOS double integral A/D
transforming IC, auto-checking to zero, auto displaying
polarity, displaying when low battery.
(2) LCD: 3 1/2 digits display with a max. reading of 1999
(3) Has function of holding data and displaying signal.
(4) LCD back light.
(5) Can use rotating switch when testing voltage.
(6) Voltage below AC 750V can be tested.
(7) High voltage is on the rails when LED is on.
(8) Displaying when low battery.
(9) Drove by Battery not by hand.
(10) Auto switch the range when resistance measuring.
(11) With strong load, appox.1.0mA output short current.
(12) Perfect circuit protect, preventing damage by voltage shock
effectively.
(13) Size of LCD: 68×55mm (Height of character is 35mm)
(14) Power: six battery 5# which is 1.5V (R6AA SUM-3)
(HP-6688B, C, F)
9.6V Ni-Mh charge battery (HP-6688BR, CR, FR)
(15) Size of shape: 218×122×75mm.
(16) Weight: 900g (contain battery).
(17) Environment:
Working temperature: 0
～
40°C,
relative humidity <80%.
Storage temperature: -10
～
50°C,
relative humidity <85%.
Temperature to ensure precision:
23 ± 5°C, relative humidity <75%.
5. Technique Index
Accuracies are ± ( % of r number in last digit ) for one
year
Environment temperature: 23 ± 5°C, Relative humidity <75%
Model
HP-6688B/
HP-6688BR
HP-6688F/
HP-6688FR
HP-6688C/
HP-6688CR
Insulation tester
5000V
2500V
1000V
Testing Rating
Voltage
500V/1000V/
2500V/5000V
250V/500V/
1000V/2500V
100V/250V/
500V/1000V
Output voltage
90
～
110% Testing Rating Voltage
Scale
1MΩ
～
200GΩ
1MΩ
～
20GΩ
1MΩ
～
20GΩ
Accuracy
1MΩ
～
200MΩ: ± ( 3.0%+5 )
200MΩ
～
10GΩ: ± ( 5.0%+5 )
10GΩ
～
200GΩ: ± ( 10.0%+5 )
Resolution
20MΩ: 10kΩ, 200MΩ: 100kΩ, 2000MΩ:
1MΩ, 20GΩ: 10MΩ, 200GΩ: 100MΩ
Scale of AC
voltage
1
～
750V
Accuracy
± ( 2.0%+5 )
Resolution
1V
Frequency
response
40
～
400Hz
Note: When you measure the resistance is less than 5MΩ in any
rating test voltage, the measuring time is not more then 10
seconds.
Remark: fall down resistance
Rating test voltage
fall down resistance
100V
1MΩ
250V
1MΩ
500V
1MΩ
1000V
2MΩ
2500V
2MΩ
5000V
8MΩ
Explaining: Fall down resistance means lower limit value of
resistance which it ensure the voltage of two extremity of
measuring is less than 90% of rating test voltage.
