No.
Item Test Methods
Total Resistance1
Measure total resistance between the resistance element and terminals (terminals #1 and #3) with the contact arm
positioned against a stop. The positioning of the contact arm and terminal shall be the same for subsequent total
resistance measurements on the same device.
Use the test voltage specified in Table-1 for total resistance measurements. This voltage shall be used whenever a
subsequent total resistance measurement is made.
Specifications and Test Methods
Residual Resistanc2
Position the contact arm at the extreme counterclockwise limit of mechanical travel and measure the resistance
between the contact arm and the corresponding end terminal. Then, position the contact arm at the extreme clock-
wise limit of mechanical travel and measure the resistance between the contact arm and the corresponding end ter-
minal. During this test, take suitable precautions to ensure that the rated current of the resistance element is not
exceeded.
Contact Resistance3
4
1
Total resistance,
Nominal (ohm)
10VRV100
100FRV1k
1kFRV10k
10kFRV100k
100kFR
1.0
Maximum Test
Voltage (V)
Rx
1
2
3
Proofreaded
Resistence
AC
Amplifier
Oscilloscope
Rx : Trimmer Potentiometer
Oscilloscope bandwidth :100Hz to 50kHz
Constant Current
Source not to
Exceed Rating of
Unit Being Tested
Figure-1 CRV measuring circuit
Table-1 Total resistance test voltage
3.0
10.0
30.0
100.0
Contact resistance variation shall be measured with the measuring circuit shown in below, or its equivalent. The
operating wiper shall be rotated in both directions through 90% of the actual effective-electrical travel for a total of 6
cycles.
The rate of rotation of the operating wiper shall be such that the wiper completes 1 countin determining whether or
not a contact resistance variation is observed at least twice in the same location. The test current shall follow the
value given in Table-2 unless otherwise limited by the power rating.
Standard total
resistance R (ohm)
100VRF10k
10kVRF100k
100VR
10mA Max.
Test Current
Table-2 Test current for CRV
1mA Max.
100µA Max.
Humidity Exposure
The wiper contact point shall be pre-setted at about 50% position of effective rotational angle. After that, the poten-
tiometer shall be placed in a chamber at 40±2°C and 90 - 95% without loading for 500±12 hours.
The resistance value shall be measured after keeping the potentiometer in a room for 5±1/6 hours.
5
High Temperature
Exposure
The wiper contact point shall be pre-setted at about 50% position of effective rotational angle. After that, the poten-
tiometer shall be placed in a chamber at 70±2°C without loading for 500±12 hours. The resistance value shall be
measured after keeping the potentiometer in a room for 1.5±1/6 hours.
6
Humidity Load Life
The wiper contact point shall be pre-setted at about 50% position of effective rotational angle. After that, the poten-
tiometer shall be placed in a chamber at 40±2°C and 90 - 95% with loading the 1/2 rated voltage between #1 and #2
terminals, intermittently 1.5 hours ON and 0.5 hours OFF for 1000±12hours.
The resistance value shall be measured after keeping the potentiometer in a room for 5±1/6 hours.
7 Load Life
The wiper contact point shall be pre-setted at about 50% position of effective rotational angle. After that, the poten-
tiometer shall be placed in a chamber at 70±2°C (50±2°C for PVZ) with loading the 1/2 rated voltage between #1
and #2 terminals, intermittently 1.5 hours ON and 0.5 hours OFF for 1000±12 hours. The resistance value shall be
measured after keeping the potentiometer in a room for 1.5±1/6 hours.
The tests and measurements shall be conducted under the condition of 15 to 35°C of temperature, 25 to 75% of relative humidity and 86 to 106 kpa of
atmospheric pressure unless otherwise specified. In case when entertained a doubt in judgment obtained from results measured in accordance with the
above mentioned conditions, the tests and measurements shall be conducted under the condition of 25±2°C of temperature and, 45 to 55% of relative
humidity and 86 to 106 kpa of atmospheric pressure.
8 Temperature Cycle
The wiper contact point shall be pre-setted at about 50% position of effective rotational angle. After that, the poten-
tiometer shall be subjected to Table-3,Table-4 temperature for 5 cycles. The resistance value shall be measured
after keeping the potentiometer in a room for 1.5±10 minutes.
Sequence
Temp. (°C) -25±3
1
Table-3 PVZ
Time (min.)
+25±2
2
3
+85±3 +25±2
4
30±3 10Max.
Sequence
Temp. (°C) -55±3
1
Table-4 PVA3/PVS3/PVM4A---A01
Time (min.) 30±3
+25±2
2
10Max.
3
+125±3 +25±2
4
30±3 10Max.
Continued on the following page.
10Max.30±3
SMD Open Type and PVM4A_A01 Series Specifications and Test Methods
70
9
!Note
• Please read rating and !CAUTION (for storage and operating, rating, soldering and mounting, handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specification or transact the approval sheet for product specification before ordering.
Please read rating and !CAUTION (for storage and operating, rating, soldering and mounting, handling) in this PDF catalog to prevent smoking and/or burning, etc.
This catalog has only typical specifications. Therefore, you are requested to approve our product specification or to transact the approval sheet for product specificaion before ordering.
!Note
R50E12.pdf 02.9.5
