Fluke 5320A-LOAD User manual

PN 3039085 February 2008 ©2008 Fluke Corporation. All rights reserved. Printed in USA. Specifications subject to change without notice. 1
5320A-LOAD
High Voltage Load Adapter
Instruction Sheet
Introduction
The 5320A-LOAD High Voltage Load Adapter
(hereafter the Load) is designed for loading a
hipot tester to create leakage current while
performing hipot tester calibration with the 5320A
Electrical Safety Tester Calibrator (hereafter the
Calibrator). As shown in Figure 1, this Load
consists of a series of eight power-rated resistors
configured to provide eight resistance taps from
10 kΩto 5 MΩ. The Load is designed to
withstand a maximum voltage of 1.2 kV to
5.5 kV, depending upon the selected resistor.
COM 10 k
10 k 20 k 15 k 50 k 150 k 250 k 500 k 4 M
35 k 50 k 100 k 250 k 500 k 1 M 5 M
ehq059
Figure 1. Load Schematic
XWWarning
To avoid possible electric shock or
personal injury, use this Load only as
specified in this Instruction Sheet or
the 5320A Calibrator Users Manual.
Preparing for Operation
The Load is shipped with a power line adapter
(to run the cooling fans), a grounding cable, and
this Instruction Sheet.
The power line adapter comes with five different
mains plug adapters for compatibility with
different power plug configurations. Prior to use,
select the appropriate plug adapter which
matches the local power mains outlet. After
attaching the plug to the power line adapter it is
ready for use with the Load.
After placing the Load on top of the Calibrator,
connect the grounding cable between the Load’s
rear-panel ground terminal and the Calibrator’s
rear-panel ground terminal.
XW Warning
To avoid electric shock from high-
voltage energy, ensure the ground
terminal on the rear of the Load is
connected to the ground (GND)
terminal on the rear of the Calibrator.
Any application with non-grounded
housing is strictly prohibited.
WCaution
To prevent damage to the Load,
ensure the vents on the bottom of the
Load and the fan exhaust vents are
clear of obstructions for proper
cooling.
Connect one end of the power line adapter to the
mating power input connector socket on the rear
panel of the Load and the other end into the
mains power outlet.
WCaution
Failure to have the fans operating
may lead to over heating and
component failure.
5320A-LOAD
1200V MAX
140 W MA X
2000V MAX
110 W MAX
2000V MAX
80W MAX
5500V MAX
300W MAX
5500V MAX
120 W MAX
5500V MAX
60W MAX
5500V MAX
30W MAX
5500V MAX
6 W MAX
COM
10 k 35k 500 k 1M50k 100 k 250k 5M
100 mA 40 mA 10 mA 4 mA 1mA
POWER
I
O
20V MAX
ehq102.eps
Figure 2. 5320A-LOAD Front Panel

5320A-LOAD
High Voltage Load Adapter
2
Turn on the power to the Load’s cooling fans by
pressing the front-panel power switch so the “1”
side of the switch is depressed (see Figure 2). A
light on the power switch illuminates to indicate
that power is connected to the fans. The power
switch to the fans may be turned off when the
Load is no longer being used.
Using the Load for Leakage
Current Testing
The Load resistor should be selected based on
the appropriate voltage amplitude used for the
test or the value recommended in the hipot
tester’s calibration procedure.
WCaution
To avoid damage, never exceed the
maximum rated voltage, power, and
current limit of the Load.
Usage Limits for Safe Operation
Safe operation of the load depends both on the
amount of voltage and the length of time it is
applied to the Load. For the 10 kΩ, 35 kΩ,
50 kΩ, 100 kΩ, and 250 kΩresistors, the higher
voltage levels have limits to the time that they
can be safely applied. The maximum voltages
can be applied for up to 3 minutes. Due to self
heating, exceeding the 3-minute limit for high
voltages may cause both degradation of
performance and a permanent shift in the
resistor values. However, reduced voltage levels
can be safely applied for increasing longer times.
At specific levels, sustained voltages can be
applied indefinitely. This is graphically shown in
Figure 3 for the 10 kΩ, 35 kΩ, 50 kΩ, 100 kΩ,
and 250 kΩresistor sets.
Safe Area
0
1000
2000
3000
4000
5000
6000
110100
Time (min)
Voltage (V)
250 k
100 k
35k/ 50k
10k
ehq101.eps
Figure 3. Safe Area Chart
As an example, the 100 kΩresistor can
withstand 5500 V for 3 minutes while it can
withstand 4000 V for 60 minutes or longer.
Performance and Verification
Test
With normal operation, the resistance values of
the Load should be verified no less frequently
than once per year. Also, the Load should be
verified if there was a possibility of the resistance
values changing due to excessive heating or
power dissipation.
To verify the electrical performance of the Load,
use one of two following test methods to insure
the load resistors are within specification.
The first test method uses voltage and current
levels that insure the resistors dissipate a
reasonable power when being verified. The
alternative second test method uses a multimeter
to measure the load resistance. Both methods
check to see if it is within 10 % of the nominal
value. The multimeter test uses minimal voltage
and current levels, dissipating negligible power
when measuring the resistance values of the
Load.
Either test method can be used, but the voltage
method is generally recommended as it verifies
the resistance value while the resistor is
dissipating actual power – similar to the normal
usage of the Load. The voltage method signal
levels are based on capabilities of the
recommended voltage calibrators. These levels
use voltages up to 1 kV. It is possible and
acceptable to test using other sources to test at
higher voltages, but staying within the limits of
the Load’s safe area of operation.
Table 1 lists the load resistance nominal value
for each test terminal.
The voltage test method requires applying a test
voltage across each resistance, between the
respective input and COM terminals. The
resulting current through the resistor is
measured, and the value of the resistance is
calculated. A calibrator is used as the precision
voltage source. A multimeter is recommended to
measure the current. Figure 4 shows the test
equipment setup. Refer to Table 1 for the
respective sourced voltage level settings and the
nominal currents to be measured.

High Voltage Load Adapter
Performance and Verification Test
3
Note
A Fluke 5520A or 5500A Calibrator is
recommended as a source for the voltage
method due to its output voltage/current
capabilities. A Fluke 8845A Digital
Multimeter (or equivalent) is
recommended for measurements with
either test method.
For the voltage test method, test each resistor as
follows:
1. Apply the recommended voltage at power
mains frequency (either 50 or 60 Hz)
between the terminal for the resistor being
measured and the COM terminal.
2. Measure the current flowing through the load.
3. Calculate the resistance by dividing the
sourced voltage by the measured current
(RL=Vs/Im).
The calculated resistance should be within 10 %
of the nominal resistance value found in Table 1.
Repeat steps 1 through 3 for each Load resistor
terminal, adjusting the applied voltage per
Table 1.
For the alternative multimeter test method,
measure each resistor as follows:
1. Place the probes of a multimeter between the
selected resistor input terminal and the COM
terminal.
2. Read the measured resistor using the
resistance mode of the multimeter, and note
the value.
3. Insure the measured value is within 10 % of
the nominal resistance.
Repeat steps 1 through 3 for each Load resistor
terminal per Table 1.
POWER
I
O
0•
123
456
789
ENTER
M
k
mVHz
FIELD
EDIT
/
+
F
OPR EARTH EXGRD SCOPE MENU
PREV
SHIFT
RESET
CE
SETUP
REF
NEW
TC
MEAS
¡F
µ
n
p
W
dBm sec
¡CA
MULT
x
DIV
÷
MODES
MORE
STBY
HI
LO
TRIG
GUARD
TC
20A
NORMAL AUX
5520A CALIBRATOR
SCOPE
OUT
V, , ,RTD A, -SENSE, AUX V
20V PK MAX
20V PK MAX
CALIBRATION
ENABLE
SERIAL 1
FROM HOST
IEEE-488
IN OUT
/ 63 Hz47 Hz
600VA MAX
FLUKE CORPORATION
MADE IN USA
PATENTS PENDING
NO INTERNAL USER SERVICEABLE
PARTS. REFER SERVICE TO
QUALIFIED SERVICE PERSONNEL
NORMAL
WARNING:
TO AVOID ELECTRIC SHOCK GROUNDING
CONNECTOR IN POWER CORD MUST BE CONNECTED
FUSE
CAUTION
FOR FIRE PROTECTION REPLACE ONLY
WITH A 250V FUSE OF INDICATED RATING
MAINS SUPPLY
100V/120V
220V/240V
T5.0A 250V
(SB)
T2.5A 250V (SB)
CHASSIS
GROUND
SERIAL 2
TO UUT
10 MHz
MAX
5V P - P
WARNING:
TO AVOID PHYSICAL INJURY, INSURE THAT THE FILTER
IS PROPERLY INSTALLED BEFORE ENERGIZING INSTRUMENT
TO CLEAN THE FILTER:
-UNPLUG INSTRUMENT
-REMOVE FILTER
-FLUSH WITH SOAPY WATER
-DRY BEFORE REINSTALLATION
INSTALLED
OPTIONS
- SC300
- SC600
5320A-LOAD
1200V MAX
140 W MAX
2000V MAX
110 W MAX
2000V MAX
80WMAX
5500V MAX
300W MAX
5500V MAX
120 W MAX
5500V MAX
60W MAX
5500V MAX
30W MAX
5500V MAX
6WMAX
COM
10 k 35k 500k 1M50k 100 k 250k 5M
100 m A 40 mA 10 mA 4 mA 1mA
POWER
I
O
20V MAX
PROTECTIVE
EARTH (GROUND)
POWER INPUT
12V
10VA MAX.
NO USER SERVICEABLE PARTSCONTAINED WITHIN.
HAZARDOUSVOLTAGESPRESENT. DO NOT REMOVE COVERS.
SAFETY WARNING
DISCONNECT POWER AND SIGNAL LEADS
BEFORE SERVICING.
READ MANUAL BEFORE USE.
REFER SERVICETO QUALIFIED PERSONNEL.
FLUKE CORPORATION
www.fluke.com
DURING USE,
TERMINAL MUST BE
CONNECTEDTO THE
PROTECTIVE EARTH
OFTHE 5320A
8846A
6-1/2 DIGIT PRECISION MULTIMETER
0.20100
mA~
DCV ACV DCI ACI TRIG
FREQ
PERIOD
TEMP ZERO
INSTR
SETUP
MEAS
SETUP
RANGE
F1 F2 F3 F4 F5
BACK
MEMORY
ANALYZE
INPUT SENSE
HI
LO
FRONT
REAR
10 A
1V
400
mA
4 W
HI
LO
2W/4W
V
300V
FUSED
1000V CAT I
600V CAT II
Front
Rear
ehq104.eps
Figure 4. Test Equipment Connections for Alternate Test Method

5320A-LOAD
High Voltage Load Adapter
4
Table 1. 5320-LOAD Resistance Verification Values
Voltage Method – Verifying the Load Resistances while under Power
Alternative DMM
Verification
Method
Nominal
Resistance
Value
Externally
Applied Test
Voltage at
mains
Frequency
Nominally
Required Test
Current
Measured
Current
Calculated
Resistance
RL=Vs/Im
(±10 % of nominal)
Measured
Resistance
(±10 % of nominal)
10 kΩ200 Vac 20 mA
35 kΩ315 Vac 9 mA
50 kΩ300 Vac 6 mA
100 kΩ600 Vac 6 mA
250 kΩ1000 Vac 4 mA
500 kΩ1000 Vac 2 mA
1 MΩ1000 Vac 1 mA
5 MΩ1000 Vac 0.2 mA
Replaceable Parts
Table 2 lists the replaceable parts for the Load. To contact Fluke, visit Fluke’s website at www.fluke.com
or call one of the following numbers:
USA and Canada: 1-888-99-FLUKE (1-888-993-5853)
Europe: [phone]
Japan: [phone]
China: [phone]
Singapore: [phone]
Anywhere in the world: [phone]
Table 2. Replaceable Parts
Description Fluke PN
POWER ADAPTER 100-240V AC, 12 V DC, with five plug adapters 3132484
GROUNDING CABLE 3132491
General Specifications
Power supply voltage........................................... AC adapter 100-240 V, output voltage 12 V @ 0.4 amps min.
Warm-up time........................................................ Not applicable
Specifications confidence level .......................... 99 %
Temperature
Operating Temperature ...................................... 5 °C to 40 °C
Recommended Calibration Temperature (Tcal) . 23 °C
Storage Temperature ......................................... -20 °C to +70 °C
Altitude, Maximum
Operating............................................................ 3,050 m (10,000 ft)
Storage ............................................................... 12,200 m (40,000 ft)
Dimensions ........................................................... 430 mm X 462 mm X 95 mm (16.9 in X 18.2 in X 3.7 in)

High Voltage Load Adapter
Electrical Specifications
5
Weight (net) ........................................................... 3 kg (8 lb 4.5 oz)
Power Consumption............................................. 5 W maximum
Safety class ........................................................... I according to EN 61010-1
Electrical Specifications
Total resistance range.......................................... 10 kΩto 5 MΩ
Number of specific resistance values ................ 8
Tolerance to Nominal Value................................. 10 % (One year, Tcal ±5 °C)
Maximum Ratings
Nominal Value Max. Voltage Max. Dissipation Power Max. Time at Maximum Power
10 kΩ1200 V 140 W Limited to 3 minutes (see Figure 3)
35 kΩ2000 V 110 W Limited to 3 minutes (see Figure 3)
50 kΩ2000 V 80 W Limited to 3 minutes (see Figure 3)
100 kΩ5500 V 300 W Limited to 3 minutes (see Figure 3)
250 kΩ5500 V 120 W Limited to 3 minutes (see Figure 3)
500 kΩ5500 V 60 W No limit
1 MΩ5500 V 30 W No limit
5 MΩ5500 V 5 W No limit

5320A-LOAD
High Voltage Load Adapter
6