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Model 5060-05A Milliohm Resistance Tester Operators Manual
Model 5060-05A Milliohm Resistance Tester
Operators Manual
(C) 2003 HARRIS IRT ENTERPRISES, INC.
ALL RIGHTS RESERVED 5060Manual.doc
05/27/03
1
Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
Harris IRT Enterprises, Inc.
Digital Milliohm Resistance Tester - Model 5060-05A

Equipment Configuration
Specifications & Dimensions
Theory of Operation
Operation of Unit
Calibration Procedure
Options
RS-232 Configuration
BCD Configuration
Temperature Compensation Procedure
Trouble Shooting Hints
Return Policy
Warranty
Assembly Drawings
2
3
4
5
7
8
9
10
11
14
15
15
16 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
EQUIPMENT CONFIGURATION:
Resistance Tester Model 5060-05A, serial number ____________________, is equipped with the
following options as indicated.
_____ Temperature Compensation at _____ for _______________
RS-232 Computer Interface _____
Binary Coded Decimal Computer Interface _____
Remote Range Select _____
Sample and Hold _____
Safety Relay _____
230 VAC Service _____
Diode Polarity Test _____
Foot Switch _____
Buzzer _____
Other ____________________ 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
SPECIFICATIONS
ACCURACY (% FULL SCALE)
RANGES
DISPLAY
READING RATE
TERMINALS
POWER REQUIREMENTS
TEST CONNECTIONS
CONNECTORS
LIMIT ALARM TERMINALS
+-0.05% (Includes +/- 1 digit) at 25 o C
+-0.001% per o C from 0 to 70 o C
0 to 1.999, 19.99, 199.9, 1.999K, 19.99K Milliohms
3 1/2 digit LED
4 readings per second (minimum)
Max. Full-scale voltage is 2.0 Volts and less than 1Amp. Current
117 VAC +/- 10 %, 50-60 Hz, 5 Watts. 2 amp Slo-Blo fuse
(230 VAC optional)
4 wire Kelvin required
Rear panel MS-style circular connector and front panel banana jacks
Dry contacts rated at 5A. At 117 VAC
DIMENSIONS 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
THEORY of OPERATION:
The Harris IRT Enterprises Model 5060-05A Milliohm Resistance Tester is a digital millohmmeter that
includes a precision constant current source which drives a known current through an unknown resistance.
It features four readings per second and a temperature compensated voltage reference serving both the DVM
and the constant current source. This results in a stable calibration reference. A digital voltmeter measures
the potential across the resistance and presents a digital display of the resistance in Ohms. CMOS circuit
construction includes a dual limit comparator which compares the measured resistance with upper and lower
tolerance values entered on front panel thumbwheels. Red and green front panel lights indicate whether or
not the resistance is within tolerance. An output relay permits the resistance tester to be converted to a
rejection device. For "fail-safe" operation the contacts are normally open. The contacts close if the part is
within tolerance.
BLOCK DIAGRAM: 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
OPERATION of UNIT
FRONT PANEL VIEW:
1)
Green light indicates that the part under test is within tolerance.
2)
Front panel banana jacks allows a 4-wire Kelvin connection to be made.
3)
Select LOW limit. Red light located above LOW limit thumbwheel switches indicates that the part
under test is below tolerance.
4)
Select HIGH limit. Red light located above HIGH limit thumbwheel switches indicates that the
partunder test is above tolerance.
5)

Range select knob. Rotate to correct range. Resistance of the part under test appears on the LED
display. A flashing "0000" display indicates that the RANGE SELECTOR (5) is set lower than the
resistance being measured.
REAR PANEL VIEW:
6)
Power cord. Connect to 117 VAC 50-60 Hz. Optional 230 VAC operation available.
7)
Fuse holder. Use a 2 Amp Slo-Blo Fuse.
8)
Temperature compensation switch.1 Center position is OFF.
9)
Temperature compensation jack for Harris IRT Enterprises, Inc. temperature probe (TC Probe)
2
.
10)
LM340 KC-5 regulator transistor.
11)

6-pin female MS-style circular connector.
3
12) 25-pin female DB-style connector, for use with RS-232
or BCD.
4
1
Optional equipment.
2
Optional equipment. Order MA1061 for replacement TC probe.
3
Mating connector for rear panel connection is available from Harris IRT Enterprises, part # 97.
4
Optional equipment 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
TEST CONNECTIONS:
NOTE:
For greatest accuracy each voltage and current lead must connect separately
to the component under test.
I +
I -
V +
V -
FRONT PANEL
BANANA JACKS
UNKNOWN
RESISTANCE
B
F
E
A
C
D
REAR PANEL
CIRCULAR
CONNECTOR
N. O. RELAY
CLOSED FOR
GOOD PART
I +
v +
v -
I -
UNKNOWN
RESISTANCE 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
5060-05A CALIBRATION PROCEDURE REQUIRED EQUIPMENT:
A. A digital voltmeter / milliammeter with a 4 ½ digit resolution is required. A Fluke®Model 8050A is
suitable.
B. A set of five standard resistances, one for each range to be calibrated. A precision of at least 0.02% is
necessary to calibrate this instrument to specifications. Harris IRT Enterprises, Inc. can supply a 0.02%
resistance set, Model 2005, with standard resistances and switchable Kelvin connections.
Recommended standard resistance:
1.9990 Milliohms
19.990 Milliohms
199.90 Milliohms
1999.0 Milliohms
19990 Milliohms
4 Wire Short or "Zero"
NOTE: The resistances must be just below the full-scale value of each range.
C. A set of test leads for a four wire Kelvin connection between the resistance standards and the resistance
tester.
1)
Place meter on the 2Km
 
range. Connect a "Zero" standard (4-wire short) to the meter.
2)
Adjust the potentiometer labeled "ZERO" on the 5012-05A Main PCB Assembly until the display on
the meter reads all zeros (0000). (See drawing on page 16 for location of potentiometer.) Disconnect
the "Zero" standard.
3)
Connect a 20
 
standard to the meter. Select the 20K range on the meter. Adjust the FSpotentiometer
on the 3692041 assembly until the display reads the certified value of the 20
 
standard. Disconnect
the 20
 
standard.
4)
Connect a 2
 
standard to the meter. Select the 2K range on the meter. Adjust the 200 potentiometer
on the 3692041 assembly until the display reads the certified value of the 2
 
standard. Disconnect the
2
 
standard.
5)
Connect a 199.9m
 
standard to the meter. Select the 200 range on the meter. Adjust the 20
potentiometer on the 3692041 assembly until the display reads the certified value of the 199.9m
 
standard. Disconnect the 199.9m
 
standard.
6)
Connect a 19.99m
 
standard to the meter. Select the 20 range on the meter. Adjust the 2
potentiometer on the 3692041 assembly until the display reads the certified value of the 19.99m
 
standard. Disconnect the 19.99m
 
standard.
7) Connect a 1.99m
 
standard to the meter. Select the 2 range on the meter. Adjust the potentiometer
located on the 3697116 assembly (1 Amp Option) until the display reads the certified value of the
1.99m
 
standard. Disconnect the 1.99m
 
standard.
Model 5060-05A calibration procedure is completed. 5060Manual.doc
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Limit Sensing Digital Milliohmmeter-5060-05A
Operator's Manual
OPTIONS :
TEMPERATURE COMPENSATION ( TC ): Temperature changes of a few degrees in a product can
have significant effects on the product's resistance.Therefore, the need for temperature compensation may
arise when the temperature of the part being tested changes over a period of time. The benefits of
temperature compensation include the saving of time, energy, and money by eliminating theneed to refer to
coefficient tables as the ambient plant temperature varies during the day. Before now, such compensation
was available only in expensive and delicate laboratory-grade instruments. Harris IRT has now made it
available in rugged resistance testers designed for use in production.
With temperature compensation, a probe sends ambient temperature data to the instrument. This
temperatureinformation is used to modify the constant current that is being passed through the part under
test. The resistance then registered is the resistance the item under test would have at the specified
temperature. The compensation option can be calibrated for the measurement of either of two measurement
coefficients or it can be operated without any compensation. The accuracy of the compensation is within
0.2% of the actual resistance between 0 and 50
°C.
RS-232 COMPUTER INTERFACE ( RS232 ): A three wire link between the resistance tester and a
computer can be made through the RS-232 port. This is a standard null-modem connection with an
adjustable baud rate (50 - 19,200) and word length of 8 bit.
This permits the reading shown on the front panel display to be sent to the computer at the set baud rate
every time the instrument is sent a character by the computer. This interface is useful for the statistical
analysis of production, predictive control, and data logging. It is compatible with any computer having an
RS-232 port and any terminal program.
Factory settings: 9600 Baud, No