Promax PE-335 User manual

PE-335
DIGITAL EARTH RESISTANCE TESTER
- 0 MI1315 -
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com

SAFETY NOTES
Read the user’s manual before using the equipment, mainly " SAFETY RULES "
paragraph.
The symbol on the equipment means "SEE USER’S MANUAL". In this
manual may also appear as a Caution or Warning symbol.
Warning and Caution statements may appear in this manual to avoid injury
hazard or damage to this product or other property.

USER’S MANUAL. PE-335
English
TABLE OF CONTENTS
1. GENERAL..................................................................................................................1
1.1 Features ..............................................................................................................1
1.2 Specifications......................................................................................................1
2. SAFETY RULES........................................................................................................3
2.1 General................................................................................................................3
2.2 Descriptive Examples of Over-Voltage Categories.............................................4
3. PRODUCT LAYOUT..................................................................................................5
4. MEASURING METHODS..........................................................................................7
5. MAINTENANCE.........................................................................................................9
5.1 Battery Replacement...........................................................................................9
5.2 Cleaning and storage..........................................................................................9

USER’S MANUAL. PE-335

USER’S MANUAL. PE-335
07/2015 Page 1
English
DIGITAL EARTH RESISTANCE TESTER
PE-335
1. GENERAL
NOTE: This meter has been designed and tested according to IEC Publication 348.
Safety Requirements for Electronic Measuring Apparatus. IEC-1010
(EN61010) and other safety standards. Follow all warnings to ensure safe
operation.
1.1 Features
• It carries out the earth resistance measurements by using the three-electrodes
method.
• Capable of measuring earth voltage.
• 2 mA measuring current permits earth resistance tests without tripping earth
leakage current breakers in the circuit under test.
• It allows the measurement by using the simplified two-electrodes method.
• Data hold function.
• Battery operated.
• Large LCD display.
• Timer for test function (count 3 ~ 5 minutes).
1.2 Specifications
Measurement system By means of a current injection of 820 Hz and 2 mA
approx.
Earth voltage 0 ~ 199.9 V AC, 50 / 60 Hz.
Maximum input voltage 200 V rms
Earth resistance
Range and resolution: 0 ~ 19.99 Ω(0.01Ω)
0 ~ 199.9 Ω(0.1Ω)
0 ~ 1999 Ω(1Ω)

USER’S MANUAL. PE-335
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Accuracy
Earth resistance: ±(2% rdg + 2 dgt) or ±0.1 Ω, which is greater.
Earth voltage: ±(1% rdg + 2 dgt)
Resp. time From 4 to 8 seconds.
Low battery indication
+
-
symbol appears on the display
Data hold indication HOLD symbol appears on the display
Over range indication It appears "1" to the left of the screen
Display LCD 3 ½ digit (2000 counts)
Power supply 9 V DC (6 x 1.5 V type R6)
NOTE: Equipment specifications are set in the following environmental operating
conditions. Operation outside these specifications are also possible. Please
check with us if you have specific requirements.
Operating environmental conditions
Altitude Up to 2000 m.
Temperature range From —10 °C to 55 °C.
Max. relative humidity 20% - 90%.
Storage temperature From 20 to -60 °C.
Dimensions 90 L. x 205 W. x 55 D. (mm).
Weight Approx. 600 g. (battery included)
Accessories PP012 Test cables set
2 auxiliary earth spikes
User’s manual
Transport suitcase
RECOMMENDATIONS ABOUT THE PACKING
It is recommended to keep all the packing material in order to return the equipment, if
necessary, to the Technical Service.

USER’S MANUAL. PE-335
07/2015 Page 3
English
2. SAFETY RULES
2.1 General
* This equipment can be used in Overvoltage Category III installations and
Pollution Degree 2 environments.
* When using some of the following accessories use only the specified ones to
ensure safety.
Test leads
* Check test leads integrity before using them.
* Observe all specified rating both of supply and measurement.
* Remember that voltages higher than 60 V DC or 30 V AC rms are dangerous.
* Use this instrument under the specified environmental conditions.
* The user is only authorised to carry out the following maintenance operations:
Battery replacement.
On the Maintenance paragraph the proper instructions are given.
Any other change on the equipment should be carried out by qualified
personnel.
* Follow the cleaning instructions described in the Maintenance paragraph.

USER’S MANUAL. PE-335
Page 4 07/2015
* Symbols related with safety:
2.2 Descriptive Examples of Over-Voltage Categories
Cat I Low voltage installations isolated from the mains.
Cat II Portable domestic installations.
Cat III Fixed domestic installations.
Cat IV Industrial installations.

USER’S MANUAL. PE-335
07/2015 Page 5
3. PRODUCT LAYOUT
(1)
(2)
(6)
(3)
(5)
(4)
English
1. Terminals for connecting
2. LCD screen
3. Press TEST ON/OFF to start/stop measurement
4. Press DATA HOLD to memorise the measurement
5. Function rotary selector
6. Battery-OK LED indicator

USER’S MANUAL. PE-335
Page 6 07/2015

USER’S MANUAL. PE-335
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4. MEASURING METHODS
BEFORE PROCEEDING MEASUREMENT, READ SAFETY
RULES ON PAGE 3.
1. In proceeding with measurement, if
+
-
symbol appears on the display, replace
with new batteries in order to avoid wrong measurements.
2. Precision earth resistance measurement method:
(1) Connect green, yellow and red test leads to instrument terminals E, P and C
with auxiliary earth spikes P1, C1 stuck into earth "IN A STRAIGHT LINE".
(Fig. 1).
(2) Rotary to function switch to EARTH VOLTAGE position and press TEST
ON/OFF to test. Earth voltage will displayed on the LCD. When earth voltage
is more than 10 V, it may result in errors in earth resistance measurement.
Accurate earth resistance measurement may not be made, location of spikes
must be checked.
English
(3) Rotary the function switch to suitable range then press the pushbutton press
TEST ON/OFF to test and take the reading.
Figure 1.-
3. Simplifted earth resistance measurement method:
(1) This method is recommended where an earth resistance higher than 10Ωis
measured or where it is not possible to drive auxiliary earth spikes. An
approximated value of the earth resistance can be obtained by means of using
the double wiring method shown in the figure 2).
(2) Rotary to function switch to EARTH VOLTAGE position and press TEST
ON/OFF to test. Make certain that earth voltage is less than 10 V.

USER’S MANUAL. PE-335
Page 8 07/2015
(3) First rotary the function switch to 200Ωposition and press to test, read earth
resistance. If the display shows "1" (MSD), switch to 2000Ωposition and read
earth resistance.
(4) The reading obtained (Rx) is an approximate earth resistance value. In order
to make this measurement, terminals P (yellow) and C (red) must be short-
circuited before.
Figure 2.-
(5) Rx = Re - re.
Rx = True Earth Resistance
Re = Indicated Value
re = Earth Resistance or Earth Electrode
(6) Since measuring current is as low as 2 mA, the earth leakage current breaker
(ELCB) does not trip even if the earth side of the commercial power supply
with an ELCB is used.
Follow the proper connection such as fig. 1 the LED (red) indication will lit. This
proves a correct current circulation is under its operation.

USER’S MANUAL. PE-335
07/2015 Page 9
5. MAINTENANCE
5.1 Battery Replacement
When the symbol
+
-
appears on the display, replace with new batteries, as
follows:
1. Disconnect the test leads from the instrument and turn off the power.
2. The compartment for batteries is located at the rear side of the equipment.
3. Use a screwdriver to unscrew the screws on back cover then slide the cover,
take out the batteries and replace with new batteries type R6.
4. Place back cover and secure by 2 screws.
5.2 Cleaning and storage
WARNING: To avoid electrical shock or damage to the meter, do not get water inside
the case.
English
Periodically wipe the case with a damp cloth and detergent: do not use abrasives
or solvents.
If the meter is not to be used for periods of longer than 60 days, remove the
batteries and store them separately.

PROMAX ELECTRONICA, S. L.