Sperry instruments DSA-2417 Operating Instructions Manual

ALL WEATHER DIGITAL LEAKAGE CURRENT TESTER

DSA-2417

OPERATING INSTRUCTIONS

7/05 FORM#352

CONTENTS

1. SAFETY WARNINGS ……………………………………………………………………1

2. FEATURES ………………………………………………………………………………3

3. SPECIFICATIONS ………………………………………………………………………4

4. INSTRUMENT LAYOUT ………………………………………………………………6

5. PREPARATION FOR TESTS …………………………………………………………8

6. OPERATING INSTRUCTIONS …………………………………………………………9

 6-1 CURRENT MEASUREMENTS …………………………………………………9

 6-2 FREQUENCY SELECTOR SWITCH ……………………………………………11

 6-3 DATA HOLD ……………………………………………………………………13

 6-4 AUTOMATIC POWER OFF ………………………………………………………13

7. BATTERY REPLACEMENT ……………………………………………………………14

− 1 −

1. Safety Warnings

󱽾

This instruction manual contains warnings and safety rules which must be observed

by the user to ensure safe operation of the instrument and retain it in safe condition.

Therefore, read these operating instructions thoroughly and completely before using

the instrument.

󱽾

The symbol

on the instrument means that the user must refer to the relevant

section of this instruction manual for safe operation of the instrument.

󱽾

Pay particular attention to all WARNINGS and CAUTIONS in this instruction manual.

WARNING indicates warnings to avoid electrical shock and CAUTION indicates

cautions to avoid damage to the instrument.

 1. Do not ope n th e ba t te r y co mpa r tme n t co ve r wh e n m a k in g

measurements.

 2. Always inspect your instrument and accessories for any sign of damage

or abnormality before every use. If any abnormal conditions exist (eg.

cracked cases, display not reading, etc.), do not attempt to carry out

any measurements.

 3. Never ground yourself when conducting electrical tests. Do not touch

exposed metal pipes, outlets, fixtures, etc., which might be at ground

potential. Keep your body isolated from ground by using dry clothing,

rubber shoes, shoes, rubber mars , or any approved insulating material.

 4. Never make measurements on a circuit above 600V AC.

 5. Never exceed the maximum allowable input of any function when making

measurements.

 6. Always set the Power/Frequency Selector Switch to the OFF position

after use.

 7. The transformer jaws are made of metal and their tips are not insulated.

Be especially careful about the hazard of possible shorting where the

equipment under test has exposed metal parts.

− 2 −

 8. Do not make measurements in an explosive atmosphere (i.e. in the

presence of flammable gasses or fumes, vapor or dust).

 9. Calibration and repair of any instrument should only be performed by

qualified and trained service technicians. Do not attempt calibration

or service unless another person capable of rendering first aid and

resuscitation is present.

 10. Do not install substitute parts or perform any unauthorized modification

of the instrument. Return the instrument to your distributor or

authorized service center for service and repair to insure that safety

features are maintained.

 11. The instrument must be used by a competent, trained person and

operated in strict accordance with the instructions. A.W.Sperry

Instruments Inc. will not accept liability for any damage or injury caused

by misuse or noncompliance with the instructions or safety procedures.

It is essential to read and understand the safety rules contained in the

instructions. They must be observed when using the instrument.

 12. Do not expose the instrument to the direct sun, extreme temperature of

more than 50℃ or dew fall.

 13. When not in use for a long period of time, place the instrument in

storage after removing the batteries from it.

 14. Use a damp cloth and detergent for cleaning the case of the instrument.

Do not use abrasives or solvents.

− 3 −

󱽾

DSA-2417 offers True RMS measurement capability.

󱽾

Designed for measurements of AC leakage and AC current with five ranges from
200mA to 500A. AC 200mA range provides a high resolution of 0.1mA.

󱽾

Least affected by external magnetic field.

󱽾

Provides dual frequency responses of fundamental 50/60 Hz only or up to 1 kHz.
The frequency response of up to 1 kHz permits measurements of current with
harmonics superimposed on the fundamental frequency. High frequency current
from appliances such as inverters, switching regulators etc. can therefore be
measured.

󱽾

Data hold function to allow for easy readings in dimly lit or hard-to-reach locations.

󱽾

Large easy-to-read LCD display

󱽾

Automatic power off within 30 minutes to conserve battery life.

󱽾

Designed to international safety standard(IEC348).

2. Features

− 4 −

3. SPECIFICATIONS

• AC current ranges

at 23±10℃ , 85％ relative humidity

Operating System: Dual lntegration

Sensing: True RMS sensing

Digital Display: 3-1/2 digit liquid crystal display with maximum reading of

1999

Overrange Indication: Numeral 1on the highest digit flashes

Response Time: Approx.2 second

Sample Rate: Approx. three times per second
Data Hold: For all ranges. In Data Hold mode,Hsymbol is displayed

on the digital display

Low Battery Indicator: Bsymbol is displayed on the digital display.
Storage Temperature -10℃〜 50℃ at 75% max. relative humidity without
 and Humidity: condensing

Operating Temperature

: 0 〜 40℃

Power Source: one 6F22(DC9V) battery or equivalent

Current Consumption:Approx. 4 mA

Auto Power Off: Automatically turns power off in approx. 30minutes after the

instrument is powered

Ranges

Accuracy

Frequency Selector Switch

WIDE(40Hz 〜 1kHz)position 50/60Hz position

200mA 0-199.9mA

±1.0% rdg±4 dgt (50/60Hz)
±3.0% rdg±4 dgt (40Hz 〜 1kHz)

±1.5 % rdg±6dgt

2000mA 0-1999mA

20A 0-19.99A

±1.5 % rdg±4 dgt (50/60Hz)
±3.5% rdg±4 dgt (40Hz 〜 1kHz)

±2.0% rdg±6 dgt

200A 0-199.9A

500A 0-500A

±2.0% rdg±4 dgt (50/60Hz)
±4.0% rdg±4 dgt (40Hz 〜 1kHz)

±2.5% rdg±6 dgt

− 5 −

Insulation Resistance: 10MΩ min. at 1000V between electrical circuit and housing

case, and electrical circuit and transformer jaws

Withstand Voltage: 3700V AC for 1 minute between electrical circuit and housing

case as well as electrical circuit and transformer jaws

Conductor Size: Approx. 40 mm diameter max.
Dimensions: 209(L)×96(W)×45(D)mm

Weight: 450g approx. (battery included)

Accessories: 6F22 battery

Carrying Case

Instruction manual

− 6 −

4. INSTRUMENT LAYOUT

⑦

Fig.1

− 7 −

① Transformer Jaws
  Pick up current flowing through the conductor.
② Jaw Trigger
  Operates the transformer jaws. Press to open them.
③

Power/Range Switch

Selects ranges. Also, turns power on. Always turn the switch to off after use.
④

Data Hold Push Button

  Push to freeze a reading and push again to release it. In Data Hold mode, His

displayed on the digital display.

⑤ Frequency Selector Switch
  Selects frequency response of 50/60Hz or up to 1kHz WIDE.
⑥

Digital Display

  Function symbols and decimal point are displayed according to the Range Switch

position.

⑦

Safety Hand Strap

Fig.2

− 8 −

5. PREPARATIONS FOR TESTS

WARNING

Always inspect your instrument and accessories for any sign of damage
or abnormality before every use. If any abnormal conditions exist (eg.
cracked cases, display not reading, etc.), do not attempt to conduct any
tests.

5-1 Battery Check

To check the battery voltage set the Power/Range Selector Switch to OFF position. If
the display is clear without symbol Bshowing, battery voltage is OK. If the display
blanks or Bis indicated, replace the battery according to section 7 for Battery
replacement.

NOTE
The instrument automatically turns power off approximately 30 minutes after
it is turned on. Therefore the display may be blank with the Power/Range
Selector Switch set to On position. To operate the instrument, set the switch
back to OFF position and then ON position.

5-2 Data Hold Switchn

If the Data Hold Switch is pressed in (DATA HOLD mode), Press to release it.
Otherwise, the display remains frozen. When the instrument is in DATA HOLA mode,

Hsymbol is indicated on the display.

− 9 −

6-1 Current Measurements

WARNING

• Do not make measurements where the potential is greater than 600V
AC. This may cause shock hazard and damage to the instrument or
equipment under test.

• The Transformer Jaws are made of metal and their tips are not
insulated. Be especially careful about the hazard of possible shorting
where the equipment under test exposed metal parts.

• Do n ot o pen the b at ter y co mpartme nt c over wh en m aki ng

measurements.

CAUTION

• Take sufficient care to avoid shock, vibration or excessive force when
handing the instrument. Otherwise, precisely adjusted Transformer
Jaws will be damaged.

• When Transformer Jaws do not fully close, never try to close them
by force, but make them free to move and try again. If a foreign
substance is stuck in the jaw tips, remove it. If the jaw tips have been
deformed, correct so that each tip is properly aligned.

Otherwise, the jaws will be damaged and warranty may not cover the

repair cost.

6. OPERATING INSTRUCTIONS

− 10 −

NOTE

• When making current measurements, keep the Transformer Jaws fully
closed. Otherwise, accurate measurements cannot be taken. Maximum
conductor size is 40mm in diameter.

• When measuring larger current, the Transformer Jaws may buzz. This is not
a fault and does not affect the accuracy either.

⑴Set the Range Switch to the desired Aor mAposition.
⑵ Select the desired frequency response, WIDO or 50/60 Hz, with the Frequency

Selector Switch. (see section 6-2 for Frequency Selector Switch)

⑶ Press the Trigger to open the Transformer Jaws and clamp onto conductor or

conductors as shown in Fig.3. Take the reading on the a display . (This method also
permits measurements of leakage current flowing through earthing conductors and
very small current.)

CAUTION
Do not exceed maximum allowable current on each current range. (see
section 3 for Specifications)

Fig.3

− 11 −

NOTE

• For more accurate measurements, place the conductor at the center of the
closed jaws.

• When measuring current on a line or a grounded wire, clamp onto one
conductor only.

⑷ When measuring out of balance leakage current, clamp onto all conductors except a

grounded wire as shown in Fig. 4.

6-2 Frequency Selector Switch

Model 2417 measures AC currents of:

⑴ 50/60 Hz fundamental frequency only with the Frequency Selector Switch set to the

50/60 Hz position(50/60Hzis indicated on the display), or

⑵ 40Hz to 1kHz with the Frequency Selector Switch set to the WIDE position(WIDE

is indicated on the display)

Fig.4

− 12 −

Frequency response of 40 Hz to 1 kHz permits measurements of current with
harmonics superimposed on the fundamental frequency. High frequency current from
appliances such as inverters, switching regulators etc. can therefore be measured.

NOTE

• DSA-2417 has a very good frequency response due to the electrical
property of the transformer jaws used for the instruments. Therefore, it
measures AC current of not only 50 Hz or 60 Hz fundamental wave form but
also of higher frequencies and harmonics superimposed on the fundamental
frequency when present in the circuit under test. To eliminate the effect of
noise from the high frequency and measure AC current of 50Hz or 60Hz
fundamental frequency, a filter circuit is incorporated into DSA-2417 which
works when the frequency selector switch is set to the 50/60Hz position.

It is designed to attenuate frequencies starting from around 100Hz with an

attenuation characteristic of approx. -24dB/octave (signal strength declines
to one sixteenth of that at the initial frequency when it doubled). Recently
there has been increased usage of power through inverters, switching
regulators, etc. When the high frequency noise from such appliances leaks
or flows into the ground through capacitors not filtering completely, the
earth leakage breaker may not trip. In such a case the instruments may
not give current readings with the frequency selector switch at the 50/60
Hz position. Therefore, it is necessary to make current measurements
with the switch at theWIDEposition. When in doubt as to the presence
of high frequencies and harmonics that affect AC current measurements,
take current readings with the switch at the 50/60Hz and WIDEpositions
respectively and then compare the results obtained.

− 13 −

6-3 Data Hold

Push the Data Hold Switch Button to freeze the reading. Hsymbol is displayed on
the digital display to indicate that the instrument is in Data Hold mode.
Push the button again to exit from Data Hold mode.

6-4 Automatic Power Off

DSA-2417 automatically turns power off in approx. 30 minutes after it is turned on. To
operate the instrument, set the Frequency Selector Switch back to OFF position and
than ON position.

− 14 −

7. BATTERY REPLACEMENT

7-1 When to replace the battery

⑴When Bsymbol is displayed on the digital display.
⑵ When the digital display does not read with the Power/Range Selector Switch set to

ON position.

7-2 Battery replacement

⑴Set the Power /Range Selector Switch to OFF position.
⑵Unscrew and remove the battery compartment cover as shown in Fig. 5.
⑶ Replace the battery with a new 9 V battery type 6F22 or equivalent, observing

correct polarity.

(4)Screw the battery compartment cover.

WARNING

Never replace the battery during measurement.

Fig.5

− 15 −

Lifetime Limited Warranty

The attention to detail of this fine snap-around instrument is further enhanced by
the application of A.W. Sperrys unmatched service and concern for detail and
reliability. These A.W. Sperry snap-arounds are internationally accepted by craftsmen
and servicemen for their unmatched performance. All A.W. Sperrys snap-around
instruments are unconditionally warranted against defects in material and workmanship
under normal conditions of use and service; our obligation under this warranty being
limited to repairing or replacing free of charge, at A.W. Sperry snap-around instrument
that malfunctions under normal operating conditions at rated use.

1

Replacement procedure

Securely wrap the instrument and its accessories in a box or mailing bag and ship
prepaid to the address below. Be sure to include your name and address, as well the
name of the distributor, with a copy of your invoice from whom the unit was purchased,
clearly identifying the model number and date of purchase.

A.W.SPERRY INSTRUMENTS INC.

ATT: Customer service dept.

2150 Joshuas Path, Suite 302,

Hauppauge, NY 11788

1

The warranty is not applicable if the instrument has been: misused, abused, subjected
to loads in excess of specifications, has had unauthorized repair or has been
improperly assembled or used.

*Note: Recommended calibration interval should not exceed one year. Calibration
service charges are not covered terms and conditions of warranty.

− 16 −

MEMO

− 17 −

MEMO