RS PRO RS-5505 Digital Insulation Tester Instruction Manual

: September 3, 2024
: RS PRO

RS PRO RS-5505 Digital Insulation Tester

INSTRUCTION MANUAL

RS-5505
Stock No: 123-1934

SAFETY INFORMATION

Read the following safety information carefully before attempting to operate or service the meter.
To avoid damage to the instrument do not apply the signals which exceed the maximum limits shown in the technical specifications tables.
Do not use the meter or test leads if they look damaged. Use extreme caution when working around bare conductors or bus bars.
Accidental contact with the conductor could result in electric shock.
Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired.
Read the operating instructions before use and follow all safety Information.
Caution when working with voltages above 60V DC or 30V AC RMS.
Such voltages pose a shock hazard.
Before taking resistance measurements or testing acoustic continuity, disconnect circuit from main power supply and all loads from the circuit.

Safety symbols:

Caution refer to this manual before using the meter.

Dangerous voltages.

Meter is protected throughout by double insulation or reinforced insulation.

When servicing, use only specified replacement parts.
CE Comply with EN-61010-1
CAT III 1000V

Measurement
Category| Application
---|---
I| Measurements on circuits not directly connected to mains.
Examples include: Measurements on battery powered equipment and specially protected (internal) mains-derived circuits.
II| Measurements on circuits directly connected to the low voltage installati on. Examples include: Household appliances, portable tools and similar equipment.
I| Measurements performed in the building installation.
Examples include measurements on distribution boards, junction boxes, socket-outlets and wiring and cables in the fixed installation.
IV| Measurements performed at the source of the low-voltage installation. Examples include measurements on primary overcurrent protection devices and electricity Instruments

1. SPECIFICATIONS

1-1 General Information Environment conditions:

① Installation Categories Ⅲ
② Pollution Degree 2
③ Altitude up to 2000 meters
④ Indoor use only
⑤ Relatively humidity 80% max.
⑥ Operation Ambient 0~40ºC

Display: 4000 count Large LCD with dual display
Measurement Range: 4000MΩ/125V, 4000MΩ/250V, 4000MΩ/500V, 4000MΩ/1000V, 400Ω/Continuity, 1000V/DCV. ,750V/ACV
Sampling Rate: 2.5 times per second.
Zero Adjustment: Automatic adjustment.
Over Range Indicator: “OL” of highest digit is displayed.
Low Battery Indication: The is displayed when the battery Voltage drop below the operating voltage.
Operating Temperature: 0ºC to 40ºC (32ºF to 104ºF) and Humidity below 80% RH
Storage Temperature: -10ºC to 60ºC (14ºF to 140ºF) and Humidity below 70% RH
Power source: DC9V (6×1.5V Size “AA” battery or Equivalent)
Dimensions: 200(L) x 92(W) x 50(H) mm
Weight: Approx. 700g include battery
Supplied Accessories: Test leads, 6pcs battery, Carrying case, manual.

1-2 Electrical Specifications

Accuracies are specified in the way:
±(…% of reading +…digits) at 23ºC±5ºC,below 80% RH.

OHMS

Range| Resolution| Accuracy| Max. open
Circuit Voltage| Overload
Protection
---|---|---|---|---
40.000| 0.010| +(1.2%+3)| 5.8V| 250Vrms
400.00| 0.10| 5.8V

Continuity Beeper

Range| Resolution| Operation Resistance| Max.open
Circuit Voltage| Overload Protection
---|---|---|---|---
•)))| 0.010| Resistance:S350| 5.8V| 250Vrms
Short circuit current| 200mA

DC Voltage

Range	Resolution	Accuracy	Input Impedance	Overload Protection
1000V	1V	+(0.8%+3)	10M0	1000Vrms

AC Voltage (40Hz~400Hz)

Range| Resolution| Accuracy| Input Impedance| Overload
Protection
---|---|---|---|---
750V| 1V| +(1.2%+10)| 10M0| 750Vrms

Meg OHMS

Terminal Voltage| Range| Resolution| Accuracy| Test Current| Short circuit
current
---|---|---|---|---|---
125V(0%~+10%)| 0.125~4.000 M0| 0.001M0| +(2%+10)| 1mA @load 125k0| :S1mA
4.001~40.00 M0| 0.01M0| +(2%+10)
40.01~400.0 M0| 0.1M0| +(4%+5)
400.1~4000 M0| 1M0| +(5%+5)
250V(0%~+10%)| 0.250~4.000 M0| 0.001M0| +(2%+10)| 1mA @load 250k0| :S1mA
4.001~40.00 M0| 0.01M0| +(2%+10)
40.01~400.0 M0| 0.1M0| +(3%+5)
400.1~4000 M0| 1M0| +(4%+5)
500V(0%~+10%)| 0.500~4.000 M0| 0.001M0| +(2%+10)| 1mA @load 500k0| :S1mA
4.001~40.00 M0| 0.01M0| +(2%+10)
40.01~400.0 M0| 0.1M0| +(2%+5)
400.1~4000 M0| 1M0| +(4%+5)
1000V(0%~+10%)| 1.000~4.000 M0| 0.001M0| +(3%+10)| 1mA @load 1M0| :S1mA
4.001~40.00 M0| 0.01M0| +(2%+10)
40.01~400.0 M0| 0.1M0| +(2%+5)
400.1~4000 M0| 1M0| +(4%+5)

2. PARTS & CONTROLS

1. Digital Display
2. Data Hold Button; MAX/MIN
3. Lock Button
4. Backlight Button; ZERO
5. Test Button
6. Rotary Function switch
7. VΩ Jack
8. COM input jack
9. Pothook
10. Battery Cover

2-1 How to connect test leads.
On MΩ Range , and 400Ω/BZ ,ACV,.DCV, Connect the red test lead into the “VΩ” terminal and the black lead into the “COM” terminal.

2-2 Test leads check
Set the range select switch to the 400Ω range. With the tip and alligator clip of the test leads connected. The indicator should read 00.0Ω. When the leads are not connected the display will read infinity indicated by “OL”. This will ensure that the test leads are in working condition.

2-3 Rotary Switch positions
Turn the Tester on by selecting any measurement.
Selection from left to right: 1000V,500V,250V,125V (4000MΩ)OFF 400Ω/BZ, 1000VDC, 750VAC.

2-4 Buttons and display Indicators
HOLD/MAX.MIN : Press the “HOLD” button the first time to hold the current reading in the primary display, press again to release the held display.

Press and hold the button for 2 seconds to enter directly into the “MAX” mode, press repeatedly to switch between “MAX” and “MIN” mode, Press and hold for 2 seconds to exit “MAX”/ “MIN” mode.

LOCK : In the insulation resistance testing function, press the “LOCK” button and then push down the “TEST” key to apply the high- voltage and enter the insulation resistance testing mode. Press the “TEST” button once more to shut off the high-voltage and exit from the insulation resistance testing status.

TEST : In the insulation resistance testing function, press and hold the “TEST” button to apply the high-voltage and enter into the insulation resistance testing mode; release the “TEST” button to cutoff the high-voltage and exit from the insulation resistance testing mode.

ZERO/LIGHT : Press the “ZERO/LIGHT” button and the current values in the primary display will be set to zero,(mainly used for 400Ω, the low resistance testing), press it again to switch off zeroing, press and hold the button for 2 seconds to switch the LCD backlight on. After 15 seconds, the backlight will shut off automatically; pressing the button for 2 seconds within 15s will also switch off the backlight.

2-5 Display Indicators

Primary Display ：Indicates the current function testing values Secondary Display： Displays the output DCV while in the insulation resistance testing mode, and the battery voltage while in the AC Voltage testing mode.

Analog Bargraph： indicates the current function testing value in conjunction with the primary display.

: While testing the insulation resistance, the symbol “ “ flashes frequently if the voltage is over 30V.
•))) : While testing the insulation resistance, the symbol” •))) “ flashes frequently and the buzzer warns continually if the circuit voltage is over 30V.

The symbol “ •))) “ is indicated while LOΩ≤35Ω and the buzzer warns continuously.

“ ” : Push down the “LOCK” button while testing the insulation resistance and the symbol “ ” is indicated.

LOBAT： The display shows “LOBAT” when the voltage drops below 7.5V
MAX/MIN: Indicates the maximum or the minimum.
ZERO : Digital zero adjusting。
HOLD : The digital holding function for the primary display.
AC，DC，: The indicator for the voltage property.
V MΩ Ω: The measured dimension units。

3. INSULATION RESISTANCE MEASUREMENTS

a) Turn the function switch from the “OFF” position to the left to choose the insulation test voltage（4000MΩ/1000V; 4000MΩ/500V; 4000 MΩ/250V; and 1000 MΩ/125V).
There are 4 ranges namely, 4MΩ; 40 MΩ; 400 MΩ and 4000 MΩ, that can be switched automatically for every test voltage.
b) Connect two testing lines to the tested.
c) Push down and hold the “TEST” button or press the “LOCK” button first and then the “TEST” button, If the circuit under test is energized and its voltage (AC/DC) is over 30V the test will not be performed and no high-voltage testing is applied, simultaneously,“>30V” is displayed on the LCD, the symbol “ ” flashes, and the buzzer warns frequently. If the circuit under test is de- energized or its voltage is lower than 30V, it will enter into the insulation testing process and apply the high-voltage for the insulation test. On the primary display, the insulation resistance in MΩ is indicated in-phase with the analog bargraph; on the secondary display, the tested insulation voltage in V(DC) is indicated, the symbol “ ” flashes and the buzzer warns frequently.
d) Release the “TEST” button or push down the “TEST” button in the “LOCK “ mode to exit from the “LOCK” status and shut off the high- voltage, at the same time the resistance values is held in the primary display and the secondary display will be in the status of monitoring the insulation voltage for the test.

e) Subsequently, discharge the balance insulation voltage of the tested through the inner switch of the meter.
Turning the function switch will exit automatically from testing status during the process

Note: The charge stored in the insulation will be discharged automatically when the test button is released. Be careful not to turn the range switch knob whilst the test button is pressed, or the instrument will be damaged.

Note: 1000V insulation test make sure that the circuit under test does not include components which will be damaged by the 1000V test voltage applied. Many normal components of an installation are likely to be damaged if tested at 1000V. Examples are power factor correction capacitors, low voltage mineral insulated cables, electronic light dimmers, electronic ballasts and starters for fluorescent lamps etc…

4. LOW RESISTANCE (CONTINUITY) MEASUREMENTS

a). Set the range switch to 400Ω / •))) Position.
b). Connect the red test lead to the V Ω terminal and black to the COM terminal.
c). Connect the tips of the test leads to both ends of the circuit under test. Read resistance in Ω on the LCD. The two ranges (40.00/400.0Ω) automatically switch; the primary display shows the actual resistance reading in Ohms and the analogue bar shows the value in relation to the full scale reading.

d). When the impedance of circuit is below approximately ≤35Ω the beeper will sound continuously.

e) The short circuit test current is between 200 and 220mA (while the tested resistance is 0Ω).

f) The high voltage symbol “ “ flashes along with a primary display of “>30V” and the buzzer warns frequently if the voltage (AC/DC) is more than 30V.

5. AC/DC VOLTAGE MEASUREMENTS

a). Set the range switch to ACV or DCV position.
b). Connect red test lead to “V Ω” terminal and black test lead to terminal “COM”.
c). Connect test prods of test leads IN PARALLEL to the circuit being measured.
d). Read the voltage value on LCD.

6. BATTERY SAVER (SLEEP MODE)

The meter will automatically enter the “sleep mode” if there is no function change or button press for 10 minutes, but it works as soon as the rotary function switch is changed or a button is pressed.

7. POWER TOOLS AND SMALL APPLIANCES

This test would also apply to other similar equipment that has a line cord. For double insulated power tools, the test lead shown connected to the housing would be connected to some metal part of the tool(e.g. chuck, blade).

Note: The switch of the device must be in the “ON” position and the main power should be disconnected.

MOTORS

AC motors – Disconnect the motor from the line by disconnecting the wires at the motor terminals or by opening the main switch. If the main switch is used and the motor also has a starter then the starter must be held, by some means, in the “ON” position. In the latter case, the measured resistance will include the resistance of the motor, wire and all other components between the motor and the main switch. If a weakness is indicated, the motor and other components should be checked individually. If the motor is disconnected at the motor terminals, connect one test lead to the grounded motor housing and the other lead to one of the motor leads.

DC motors – Disconnect the motor from the line. To test the brush rigging, field coils and armature connect one test lead to the grounded motor housing and the other lead to the brush on the commutator. If the resistance measurement indicates a weakness, raise the brushes off the commutator and separately test the armature, field coils and brush rigging by connecting one test lead to each of them individually, leaving the other connected to the grounded motor housing. The above also applies to DC Generators.

CABLES

Disconnect the cable from the line. Also disconnect the opposite end to avoid errors due to leakage from other equipment. Check each conductor to ground and/or lead sheath by connecting one test lead to a ground and /or lead sheath and the other test lead to each of the conductors in turn. Check the insulation resistance between conductors by connecting the test leads to conductors in pairs.

8. BATTERY INSTALLATION & REPLACEMENT

CAUTION

The following safety information must be observed to ensure maximum personal safety during the operation of this instrument. To avoid electric shock, disconnect the test leads before replacing the batteries.

When replacing the instrument batteries, do not mix batteries of different types or old and new batteries.
Check the battery polarity carefully when inserting the batteries. To avoid electric shock, do not operate the meter until the fuse/battery door is in place and fastened securely.
Do not short-circuit used batteries, disassemble them, or throw them in a fire. Doing so may cause the batteries to explode. Dispose of the used batteries in accordance with local regulations.

If the battery power is not sufficient the LCD will display . Replacement with 6 pcs new batteries, type 1.5V size “AA” is required.

1. Disconnect the test leads from the meter.
2. Open the fuse/battery door by loosening the screws using a Phillips head screwdriver.
3. Insert the batteries into the battery holder, observing the correct polarity.
4. Put the fuse/battery door back in place. Secure with the four screws.

NOTE : If your meter does not work properly, check the fuses and battery

9. FUSE REPLACEMENT

WARNING:
To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse/battery door.
To avoid electric shock, do not operate the meter until the fuse/battery door is in place and fastened securely.
Always use fuses of the proper size and rating:

1. Disconnect the test leads from the meter and any item under test.
2. Open the fuse/battery door by loosening the screw on the door using a Phillips head screwdriver.
3. Remove the old fuse from its holder by gently pulling it out.
4. Install the new fuse into the holder.
5. Always use a fuse of the proper size and rating: F500mA 1000V Ceramic Fuse(SIBA UL500mA 1000V,Size:6.3x32mm)
6. Put the fuse/battery door back in place. Insert and securely tighten the screws.

10. MAINTENANCE & CLEANING

1. Repairs or servicing not covered in this manual should only be performed by qualified personnel.
2. Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this instrument.

Limited Warranty

This meter is warranted to the original purchaser against defects in material andworkmanship for 1 years from the date of purchase. During this warranty period,RS Components will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction. This warranty does not cover fuses, disposable batteries, or damage from abuse, neglect, accident, unauthorized repair, alteration, contamination, or abnormal conditions of operation or handling. Any implied warranties arising out of the sale of this product, including but not limited to implied warranties of merchantability and fitness for a particular purpose,are limited to the above. RS Components shall not be liable for loss of use of the instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim or claims for such damage, expense or economic loss. Some states or countries laws vary, so the above limitations or exclusions may not apply to you. For full terms and conditions, refer to the RS website.

Specifications

Display: 4000 count Large LCD with dual display
Measurement Range: 4000M/125V, 4000M/250V, 4000M/500V, 4000M/1000V, 400/Continuity, 1000V/DCV, 750V/ACV
Sampling Rate: 2.5 times per second
Zero Adjustment: Automatic adjustment
Over Range Indicator: OL of highest digit is displayed
Low Battery Indication: The “LOW BATTERY” is displayed when the battery voltage drops below the operating voltage
Environment conditions: 80% RH, 70% RH
Power source: DC9V (6×1.5V Size AA battery or Equivalent)
Dimensions: 200(L) x 92(W) x 50(H) mm
Weight: Approx. 700g including battery
Supplied Accessories: Test leads, 6pcs battery, Carrying case, manual

Frequently Asked Questions (FAQ)

Q: What should I do if the Low Battery indication is displayed?

A: If the “LOW BATTERY” indication is displayed, replace the batteries with new ones of the specified type to ensure proper operation of the meter.

Q: How often should I calibrate the digital insulation tester?

A: It is recommended to calibrate the digital insulation tester annually or whenever you suspect inaccurate readings to maintain its accuracy and reliability.