English User's Manual

User's Manual
Earth Ground Resistance Tester Kit
Model 382252
Introduction
Congratulations on your purchase of the Extech 382252 Earth Ground Resistance Tester Kit. This
device can measure Earth Ground Resistance (in 3 ranges), Earth Voltage and Resistance (up to
200kand AC and DC voltage. This device was designed to meet EN61010-1 safety standards.
Careful care and use of this meter will provide years of reliable service.
Safety
Please read the following safety information carefully before attempting to operate the meter and
use the meter only as specified in this manual.
Environmental safety information

Do not use meter outdoors when precipitation is likely

Installation Category III

Pollution degree 2

Altitude: 2000 meters max.

Ambient conditions: 32 to 104 F (0 to 40 C); RH: 80% max

Observe the following international safety warning symbols
o
o
Safety Symbols
Caution: Refer to this manual before using this meter
Dangerous Voltages
Meter is protected throughout by double or reinforced insulation
Organizations that provide rules and guidelines for proper grounding
 The National Electrical Code (NEC)
 Underwriters Laboratories (UL)
 National Fire Protection Association (NFPA)
 American National Standards Institute (ANSI)
 Occupational Safety Health Administration (OSHA)
 Telecommunications Industry Standard (TIA)
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Meter Description
1.
Digital Display – See Display Description below
2.
HOLD key – Freezes measurement value on display
3.
0 ADJ control- Adjusts Zero value on display
4.
Backlight key – Turns on Backlight
5.
TEST key – Enables Earth Resistance and Earth
Voltage Tests
2
6.
Function Selector switch – Selects desired range and
function
3
1
4
5
6
Top View
1.
VC Input
2.
P Input
3.
COM/E Input
1
Display Description
1.
Test status Icon
2.
Battery Charge indicator -
3.
Voltage Unit indicator
4.
Audible Signal Icon
9
8
5.
kUnits Indicators
7
6.
Measurement Value
7.
AC/DC Voltage Indicators
8.
Low Battery Icon
9.
HOLD Icon
1
2
3
2
3
4
5
6
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Operation
0 Adjustment
1.
Connect the test leads to the meter as follows:
a. Green lead to the 'E' terminal
b. Yellow lead to the 'P' terminal
c. Red lead to the 'C' terminal
2.
Set the function selector switch to the desired measurement range.
3.
Short the 3 test leads together.
4.
Press the TEST key.
5.
Use the 0 Adjust knob to adjust the displayed reading to 0
6.
Press to TEST key again to end the 0 adjustment process.
Test Connection Diagram
1.
382252 Meter
2.
Green Test Lead
3.
Yellow Test Lead
4.
Red Test Lead
5.
Existing Ground
6.
P1 Auxiliary Earth Bar
7.
C1 Auxiliary Earth Bar
2
3
4
5
6
7
1
Test Preparation and Setup
1. Connect the test leads to the meter (1) as follows:

Green lead (2) to the 'E' terminal

Yellow lead (3) to the 'P' terminal

Red lead (4) to the 'C' terminal
2. Drive the Auxiliary Earth Bars P1 (6) & C1 (7) into the ground. Align the bars equidistant to the
existing Earth ground connection and in a straight line as shown in the diagram above. If the
auxiliary bars are placed in close proximity to the ground stake, measurement inaccuracies will
result.
3. Connect the clamp ends of the test leads to the Earth bars and existing ground connection as
shown above:

Green lead (2) to the existing ground (5)

Yellow lead (3) to Earth Bar P1 (6)

Red lead (4) to the Earth Bar C1 (7)
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Earth Voltage Test
1. Set the function on the selector’s switch to the EARTH VOLATAGE position.
2. Confirm that the voltage measurement is less than 10V AC; otherwise accurate Earth resistance
measurements cannot be made. If voltage is present (higher than 10V AC), the source of the
voltage must be found and corrected before testing can continue.
3. Press to TEST key to end the test. Note the LCD reading.
Earth Resistance Test
1. Set the meter's function switch to the desired resistance range.
2. Press the TEST button. . The “
“ icon will flash and the audible signal will sound.
3. Note the displayed reading.
4. If high resistance is detected, note the value and take appropriate steps to correct the ground
connection if necessary.
5. Press to TEST key to end the test.
6. Readings of “1”… are typical when the test leads are not connected to the meter.
HOLD Function
The Hold function freezes the latest measurement reading on the LCD.
1. Press the HOLD key to freeze the reading on the LCD
2. Press the HOLD key again to exit the HOLD function.
3. The HOLD function does not retain measurement data if the meter is turned off.
Backlight
1.
Press the “
2.
The backlight will turn off after approximately 15 seconds.
“ key to turn on the backlight.
200k Resistance Measurement
1.
Connect the red test lead to the Vconnector and the black test lead to the COM connector.
2.
Set the function selector switch to the 200kposition.
3.
Connect the test probes to the circuit or component under test.
4.
Note the displayed Resistance value.
AC Voltage Measurement
1.
Connect the red test lead to the Vconnector and the black test lead to the COM connector.
2.
Set the function selector switch to the 750V AC position.
3.
Connect the test probes to the circuit under test.
4.
Note the displayed Voltage value.
DC Voltage Measurement
1.
Connect the red test lead to the Vconnector and the black test lead to the COM connector.
2.
Set the function selector switch to the 1000V DC position.
3.
Connect the test probes to the circuit under test.
4.
Note the displayed Voltage value.
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Maintenance
Battery Replacement
' appears on the LCD, the meter's batteries must be changed.
When the low battery icon '
1. Remove power and disconnect the test leads from the meter.
2. Remove the tilt stand from the rear of the meter.
3. Remove the 4 battery compartment screws with a Phillips head screwdriver.
4. Remove the battery compartment cover and replace the six 1.5V 'AA' batteries.
5. Affix compartment cover and tighten screw.
6. Reattach the tilt stand.
You, as the end user, are legally bound (Battery ordinance) to return all
used batteries and accumulators; disposal in the household garbage is
prohibited!
You can hand over your used batteries / accumulators at collection points
in your community or wherever batteries / accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
Cleaning and Storage
Periodically wipe the meter's case with a damp cloth and mild detergent; do not use abrasives or
solvents. If the meter is not to be used for a period longer than 60 days, remove the batteries and
store them separately.
Specifications
General Specifications
Measurements
Earth Ground Resistance (in 3 ranges), Earth Voltage,
AC Voltage to 750V and DC Voltage to 1000V
Display
Large LCD with dual display
Sampling Time
2.5 times per second
Test lead length
Red lead: 50' (15m), Yellow: 33' (10m), Green: 16' (5m)
Over-range indication
'1' displayed as most significant digit
Power supply
Six 1.5V 'AA' batteries (included)
Low battery indication
LCD displays
icon
Auto Power Off
After approximately 15minutes of use
Safety
EN-61010-1 category III
Weight
700g (24.7oz) with batteries
Dimensions
200 x 92 x 50 mm (7.9 x 3.62 x 2")
Supplied accessories
Multimeter Test leads (2), Earth Ground test leads (3), auxiliary earth
bars (2), six 'AA' batteries, and carrying case
Operating Conditions
0ºC to 40ºC (32ºF to 104ºF), with < 80% RH
Storage Conditions
-10ºC to 60ºC (14ºF to 140ºF), with < 70% RH
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Measurement Specifications
Measurement
Earth Ground
Resistance
Earth Voltage
Range
Resolution
Accuracy
20
0.01
± (2% reading + 10 digits)
200
0.1
2000
1
0 to 200VAC
Frequency: 40 to
500Hz
0 to 200kΩ
Resistance
± (2% reading + 3 digits)
0.1V
± (3% reading +3digits)
0.1k
± (1% reading +2 digits)
Overload Protection:
250 Vrms
AC Voltage
0 to 750V
40 Hz to 400Hz
Overload Protection: 750 Vrms, Input Impedance: 10M
0 to 1000V
DC Voltage
1V
± (1.2% reading +10 digits)
1V
± (0.8% reading +3 digits)
Overload Protection: 1000 Vrms, Input Impedance: 10M
Copyright © 2014 FLIR Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form www.extech.com 7
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