61-797

Digital Insulation Meter

Instruction Manual

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Read First: Safety Information
Understand and follow operating instructions carefully. Use the meter, test leads, and all accessories only as specified in this manual; otherwise, the protection provided by the meter can be impaired.
** WARNING
To avoid possible electric shock, personal injury, or death, follow these guidelines:**

• Do not use if the meter appears damaged. Visually inspect the meter to ensure the case and jaws are not cracked.
• Inspect and replace test leads if insulation is damaged, metal is exposed, or probes are cracked. Pay particular attention to the insulation surrounding the connectors.
• Always ensure the meter, test leads, and all accessories meet or exceed the measurement category required in the working environment. (i.e. CAT rating)
• Note that the measurement category and voltage rating of combinations of the meter, the test leads, and the accessories is the lowest of the individual components.
• Do not use the meter if it operates abnormally as protection may be impaired.
• Do not use it during electrical storms or in wet weather.
• Do not use around explosive gas, dust, vapor, amperage, or in damp or wet environments.
• Do not apply more than the rated voltage to the meter.
• Remove the test leads from the input jacks before measuring the current.
• Replace the battery as soon as the battery indicator appears to avoid false readings.
• Remove the test leads from the meter prior to removing the battery cover.
• Do not use without the battery and battery cover properly installed.
• Do not attempt to repair this unit as it has no user-serviceable parts.
• Use the proper terminals, functions, and range for your measurements.
• Never ground yourself when taking electrical measurements.
• Connect the black common lead to ground or neutral before applying the red test lead to potential voltage. Disconnect the red test lead from the voltage first.
• Keep fingers behind the guard rings of the probe tips.
• Voltages exceeding 30VAC or 60VDC pose a shock hazard so use caution.

CAUTION
To protect yourself, think “Safety First”:

• Comply with local and national safety codes.

• Use appropriate personal protective equipment such as face shields, insulating gloves, insulating boots, and/or insulating mats.

• Before each use:
  – Perform a continuity test by touching the test leads together to verify the functionality of the battery and test leads.
  – Use the 3 Point Safety Method. (1) Verify meter operation by measuring a known voltage. (2) Apply meter to the circuit under test. (3) Return to the known live voltage again to ensure proper operation.

• Always work with a partner.

Instrument – Description

Feature Callouts

1. LCD Display – 4000 count
2. Push-Buttons for features
3. Function Selector to turn the Power On or Off and to select a function.
4. Input Terminal for Ω function.
5. Input Terminal for V insulation functions.
6. Common (Ground reference) input Terminal for all functions.

Symbols on the Unit

| Risk of Danger. Important Information. See Manual.
---|---
| Hazardous voltage. Risk of electrical shock.
| Application around and removal from Hazardous Live conductors is permitted.
| AC (Alternating Current)
| DC (Direct Current)
| Earth Ground
CAT II| Measurement Category II applies to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage installation
CAT III| Measurement Category III applies to measuring circuits connected to the distribution part of the building’s low-voltage installation
CAT IV| Measurement Category IV applies to test and measuring circuits connected at the source of the building’s low-voltage installation

Test Leads

When connecting the test leads to the DUT (Device Under Test) connect the common (COM) test lead before connecting the live lead; when removing the test leads, remove the live test before removing the common test lead. The figures on the following pages show how to make basic measurements.
Measuring ACV/DCV: Auto Sense Function

If the measured voltage is above 660 V ac/dc, “ >660Vac/dc” will appear on the display.
Auto sense mode: The meter displays ACV or DCV whichever is higher (>0.3V).
If the measured voltage is above 660Vac/dc, “660Vac/dc” will appear on the display.

Measuring ACV/DCV: Auto sense +LPF function

The Low Pass Filter (LPF) mode when activated in the AC Voltage Mode rejects or blocks unwanted voltage at frequencies > than 1k HZ. The Low Pass filter can greatly improve measurements on complex waveforms such as adjustable speed drives or variable frequency drives.

Measuring Earth-Bond Resistance

1. Before starting the test :
   (a) The circuit under test must be completely de-energized.
   Check the fuse before testing.
   Connecting to an energized circuit while the test is active will blow the fuse.
   See Testing the fuse later in this manual.
   If the detected voltage is above 2V, “>2V” will appear on the display.
   In this condition, the test is inhibited.
   (b) Short the test leads before measurement, and press the blue button to compensate the probe resistance for <2Ω.

2. Lock mode: Press the Lock button to enter the Lock Mode.
   Then press the TEST button to start the test. The test voltage will continue to be applied until the TEST/LOCK button is pressed again.

3. The meter displays the “>” symbol and the maximum resistance for the range when measured resistance is higher than the maximum display range.

Measuring Insulation Resistance

1. Before starting the test:
   The circuit under test must be completely de-energized. If the voltage detected is above 30V, “>30V” will appear on the display. In this condition, the test is inhibited.

2. Press the blue button to display insulation resistance or Leakage current during the test or when the test stops.

3. Lock mode: Press the Lock button to enter the Lock Mode. Then press the TEST button to start the test. The test voltage will continue to be applied until the  EST/LOCK button is pressed again.

4. Release the TEST button before removing the test leads (to enable the tester to discharge capacitive circuits). If the screen displays volts, wait until it reaches zero.

5. The meter displays the “>” symbol and the maximum resistance for the range when measured resistance is higher than the maximum display range.

Using the Compare Function

1. Before starting the insulation test:
   Press the COMP button to select the compare value among 100kΩ, 200kΩ, 500kΩ, 1MΩ, 2MΩ, 5MΩ, 10MΩ, 20MΩ, 50MΩ, 100MΩ, 200MΩ and 500MΩ

2. If the measured value is greater than the selected compare value, the green Pass indicator will illuminate.

Measuring PI/DAR

PI (Polarization Index) = R10-min/R1-min
DAR (Dielectric Absorption Rations) = R1-min/R30-sec
R10-min: the insulation resistance measured at the 10-minute mark after pressing the TEST button.
R1-min: the insulation resistance measured at the 1-minute mark after pressing the TEST button.
R30-sec: the insulation resistance was measured at the 30-second mark after pressing the TEST button.

When the measured resistance is higher than the maximum range, the screen will display the “Err” symbol for the PI/DAR value.
TEST button: Press once to start/interrupt the PI /DAR test.
Blue button: Use to display and check the time left of the PI/DAR test.

The measured values of the PI test
PI = R10-min/R1-min

If the reading for DAR is bigger than 1.3 or PI is bigger than 2, it indicates that the insulation is good. On many installations, the quality of the insulation is so good that both the initial measured value and the subsequently measured value (when performing the PI or DAR tests), will be the maximum that the meter can read. Dividing one into the other will of course read the value of 1, which in this case may be perfectly good. It is strongly recommended that in all cases, you contact the manufacturer of the device under test or the appropriate manual, to ensure that any reading meets the manufacturer’s specification for determining if a part is good or bad.

Using the Store Function

Store/Recall button:
The screen will be flashing the MEM symbol and the number of the stored data twice when the Store/Recall button is pressed.

1. Press once to store the voltage value during the voltage test
2. Press once to store the PI/ DAR, insulation, or Earth-bound resistance value when the individual test is completed.
3. The memory is divided into five segments, each segment has 100 maximum data points. The method to store the data is first in/first out when the memory is full.

Table: The stored values of the individual test

segments

|

Voltage

|

Earth-Bond
resistance

|

Insulation
resistance
50~1000V

|

DAR

|

PI

---|---|---|---|---|---

items

1

|

Voltage

|

Resistance

|

Resistance

|

DAR value

|

PI value

2

| | |

Leakage
Current

|

R30-sec

|

R1-min

3

| | |

Test voltage

|

R1-min

|

R10-min

Note: Press the Store/Recall button > 5 sec to clear the stored data.
The screen will be flashing the MEM symbol and “cLr” on reading twice.
Using the Recall Function
Press the Store/Recall button > 2 sec to enter the RECALL mode.
If the memory is empty, the meter will display the “ nOnE ” symbol.
Search the stored value under RECALL mode

Read the stored value of insulation test under RECALL mode

Read the stored value of the DAR test under RECALL mode
Press the PI/DAR button > 2 sec to choose the PI/DAR function, and Press the Store/Recall button > 2 sec to enter the RECALL mode.

Read the stored value of the PI test under RECALL mode

Restore power by switching the Function Selector or by pressing any button.

Auto Backlight
The backlight is automatically turned on in a dark environment.
Buzzer
The Meter beeps once for every valid key-press and beeps twice for every invalid key-press.

Power-up options:
Press the button while turning the meter on from the OFF position.
Lock button: the display of the software version.
Store button: reset all stored data.
Blue button: disable auto power off.

Battery and Fuse Replacement
Refer to the following figure to replace the fuse and batteries.

Testing the Fuse

CAUTION:

• Use only a fuse with the amperage, interrupt, voltage, and speed rating specified.
• Fuse rating: Fast, 315mA, 1000V, Min Interrupt Rating 10000A.
• Replace the batteries as soon as the low battery indicator “ ” appears, to avoid false readings.
• When the battery is too low for reliable operation, the meter displays “bAtt.” The meter will not operate at all until the battery is replaced.
• 1.5V x 4 alkaline batteries.
• Remove the test leads before testing the fuse.
• If the display is reading FUSE, the fuse is bad and should be replaced.

Specifications General Specifications

Display:
Refresh Rate: Over range:
Polarity:
Auto Power Off:
Low Battery:Altitude:
Accuracy:Batteries:
Battery Life:
Fuse:
Operating environment: Storage environment: Weight:
Size:

Assecories Included:

Shock Vibration:

Safety Certification:

| 4000 count
2.0x/sec.
“OL” is displayed
Automatic (no indication for positive
polarity); Minus (-) sign for negative
polarity
After 20 minutes of non-use
is displayed if battery voltage drops
below operating voltage.
6561.7 ft (2000m)
Stated accuracy at 73º ±41ºF (23º ±5ºC),
< 80% R.H.
(4) 1.5V AA LR6
40 hrs./1000 test @ 1000V/1MΩ
315mA/1000V (#F-797)
32º to 104ºF (0º to 40ºC) at < 75% R.H.
-4° to 140°F (-20º to 60ºC) at < 80% R.H.
22.3 oz (630g)
8.1”H x 3.7”W x 2.0”D
(207mmH x 95mmW x 52mmD)
Test leads (TL-797, TL-797 RP),
(4) AA batteries, Operating Instructions
Sinusoidal vibration per MIL-T- 28800E
(5 ~ 55 Hz, 3g maximum).
Complies with UL/IEC/EN 61010-1,
61010-031, EN61557, EN 61326-1 +1A (EMC)
Cat IV-600V
---|---

Equipment protected by double insulation.
The instrument has been evaluated and complies with insulation (overvoltage) category IV. Pollution degree 2 in accordance with IEC-644. Indoor use.
Maintenance
Clean the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
Service and Replacement Parts
No user-serviceable parts.
For replacement parts or to inquire about service information, contact IDEAL INDUSTRIES, INC. at 1-877-201-9005 or visit our website @ www.testersandmeters.com.

Dispose of waste electrical and electronic equipment
In order to preserve, protect and improve the quality of the environment, protect human health and utilize natural resources prudently and rationally, the user should return the unserviceable products to relevant facilities in accordance with statutory regulations. The crossed-out wheeled bin indicates the product needs to be disposed of separately and not as municipal waste.

Dispose of used batteries/accumulators
The user is legally obliged to return used batteries and accumu- later. Disposing of used batteries in household waste is prohibited! Batteries/accumulators containing hazardous substances are marked with the crossed-out wheeled bin. The symbol indicates that the product is forbidden to be disposed of via domestic refuse. The chemical symbols for  the respective hazardous substances are Cd = Cadmium, Hg = Mercury, Pb = Lead

You can return used batteries/accumulators free of charge to any collecting point of your local authority, our stores, or where batteries/accumulators are sold. Consequently, you comply with your legal obligations and contribute to environmental protection.

Electrical Specifications
Accuracy is ±(% reading + number of digits) at 23°C ±5°C < 80%RH.
Voltage Measurement

±(2%+5dgt)(61~500Hz)
LPF ACV| 600.0V| ±(1.5%+5dgt)(50~60Hz)
±(5%+5dgt)(61~400Hz)

Initial Voltage: ≥ AC 0.6V.
Over voltage protection: 600 V AC RMS/DC.
The cut-off frequency of the low pass filter: 1 kHz.
Input Impedance: 3MΩ // less than 100pF.
CMRR / NMRR: (Common Mode Rejection Ratio)
(Normal Mode Rejection Ratio)

VAC: CMRR > 60dB at DC, 50Hz / 60Hz
VDC : CMRR > 100dB at DC, 50Hz / 60Hz NMRR > 50dB at DC, 50Hz / 60Hz

AC Conversion Type: AC conversions are ac-coupled, true rms responding, calibrated to the sine wave input.
For non-sine waves add the following Crest Factor corrections:
For Crest Factor of 1.4 to 2.0, add 1.0% to accuracy.
For Crest Factor of 2.0 to 2.5, add 2.5% to accuracy.
For Crest Factor of 2.5 to 3.0, add 4.0% to accuracy.
CF 3 @ 330V, 2 @ 500V

Earth-bond resistance Measurement

Function

| Range|

Accuracy

---|---|---

Earth-Bond
Resistance

|

40.00Ω

|

±(1.5%+5dgt)*

400.0Ω

|

±(1.5%+3dgt)

4000Ω

40.00kΩ

*<1.00Ω add 3dgt
Open Circuit Test Voltage : > 4.0V,<8V, Short Circuit Current : > 200.0mA
Live Circuit Detection: if > 2V ac/dc at inputs, test inhibited.

Insulation resistance Measurement

|

Range

|

Accuracy

---|---|---

Insulation

Resistance

|

4.000MΩ

40.00MΩ

|

±(1.5%+5dgt)

400.0MΩ

4000MΩ

|

±(3%+5dgt)

4.1GΩ ~ 20.0GΩ

|

±(10%+3dgt)

Test Voltage vs. Maximum resistance range:
50V/50.0MΩ, 100V/100.0MΩ, 250V/250.0MΩ, 500V/500MΩ, and
1000V/20.0GΩ.
Test Voltage vs. Minimum resistance (with test current=1mA):
50V/50kΩ, 100V/100kΩ, 250V/250kΩ, 500V/500kΩ and 1000V/1MΩ.
Test Voltage Accuracy: -0%,+20%
Short Circuit Test Current : 1mA(nominal)
Auto discharge function: discharge time <1 sec for C <1μF
Maximum Capacitive load: Operable with up to 1μF load
Live Circuit Detection: if >30V ac/dc at inputs, test inhibited

Warranty Statement
This tester is warranted to the original purchaser against defects in material and workmanship for two years from the date of purchase. During this warranty period, IDEAL  INDUSTRIES, INC. will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction.

This warranty does not cover fuses, batteries, or damage from abuse, neglect, accident, unauthorized repair, alteration, or unreasonable use of the instrument.
Any implied warranties arising out of the sale of an IDEAL product, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited to the above. The manufacturer 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, expenses, or economic loss.
State laws vary, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

IDEAL INDUSTRIES, INC.
Sycamore, IL 60178, U.S.A.
877-201-9005 Technical Hotline
www.idealind.com
ND 7039-3
Made in Taiwan

References

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