SMD Open Type (PVZ2/A2/Z3)/SMD Sealed Type (PVM4A_C01 Series) Specifications and Test Methods

9

Rotational Life

The wiper should be rotated over 90% of the effective rotational angle without loading at a speed of 10 cycles per

minute, for 10 cycles continuously. The resistance value should be measured after keeping the potentiometer in a

room for 10±5 minutes.

8

Temperature Coefficient of

Resistance

The trimmer potentiometer should be subjected to each of the following temperatures (see Table 5, Table 6) for 30

to 40 minutes. The resistance value should be measured in the chamber.

Table 5: PVZ

Note*: Norm temp.

Table 6: PVA2/PVM4A

---C01

7

Temperature Cycle

The wiper contact point should be preset at about 50% position of effective rotational angle. After that, the

potentiometer should be subjected to Table 3, Table 4 temperature for 5 cycles. The resistance value should be

measured after keeping the potentiometer in a room for 1 to 2 hours.

Table 3: PVZ

Table 4: PVA2/PVM4A

---C01

6

Load Life

The wiper contact point should be preset at about 50% position of effective rotational angle. After that, the

potentiometer should 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 should be measured after keeping the potentiometer in a room for 1 to 2 hours.

5

Humidity Load Life

The wiper contact point should be preset at about 50% position of effective rotational angle. After that, the

potentiometer should 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±12 hours.

The resistance value should be measured after keeping the potentiometer in a room for 5±1/6 hours.

4

High Temperature

Exposure

The wiper contact point should be preset at about 50% position of effective rotational angle. After that, the

potentiometer should be placed in a chamber at 70±2°C without loading for 500±12 hours. The resistance value

should be measured after keeping the potentiometer in a room for 1.5±1/6 hours.

3

Humidity Exposure

The wiper contact point should be preset at about 50% position of effective rotational angle. After that, the

potentiometer should be placed in a chamber at 40±2°C and 90 - 95% without loading for 500±12 hours.

The resistance value should be measured after keeping the potentiometer in a room for 5±1/6 hours.

2

Contact Resistance

Contact resistance variation should be measured with the measuring circuit shown below, or its equivalent. The

operating wiper should 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 should be such that the wiper completes 1 count in determining whether or

not a contact resistance variation is observed at least twice in the same location. The test current should follow the

value given in Table 2 unless otherwise limited by the power rating.

Table 2: Test current for CRV

Figure 1: CRV measuring circuit

1

Residual Resistance

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

clockwise limit of mechanical travel and measure the resistance between the contact arm and the corresponding end

terminal. During this test, take suitable precautions to ensure that the rated current of the resistance element is not

exceeded.

Standard Total

Resistance R (ohm)

Test Current

20mA max.

1mA max.

100μA max.

100

VR

10k

VR

100k

VR

F10k

F100k

Sequence

1

-25±3

30±3

2

+25±2

10 max.

3

+85±3

30±3

4

+25±2

10 max.

Temp. (°C)

Time (min.)

Sequence

1

-55±3

30±3

2

+25±2

10 max.

3

+125±3

30±3

4

+25±2

10 max.

Temp. (°C)

Time (min.)

Sequence

1*

+25±2

2

-25±3

3*

+25±2

4

+85±3

Temp. (°C)

Sequence

1*

+25±2

2

-55±3

3*

+25±2

4

+125±3

Temp. (°C)

No.

Test Methods

Item

The tests and measurements should be conducted under the conditions of 15 to 35°C of temperature, 25 to 75% of relative humidity and 86 to 106 kpa of

atmospheric pressure unless otherwise specified. If questionable results occur that have been measured in accordance with the above-mentioned

conditions, the tests and measurements should be conducted under the conditions of 25±2°C of temperature, 45 to 55% of relative humidity and 86 to

106 kpa of atmospheric pressure.

Rx

#1

#2

#3

Calibration

resistance

AC

Amplifier

vertical

entry

Oscilloscope

Rx : Trimmer Potentiometer

Oscilloscope bandwidth: 100Hz to 50kHz

Constant Current

Source

(Test current

shown in Table 2)

TCR=

Standard Total

Resistance R

(ohm)

Test

Current

20mA

10mA

4mA

2mA

1mA

R

100

FR

500

VR

1k

VR

2k

VR

V100

F500

F1k

F2k

F50k

Standard Total

Resistance R

(ohm)

Test

Current

200μA

100μA

50μA

30μA

50k

VR

200k

VR

1M

VR

2M

VR

F200k

F1M

F2M

· PVZ/PVA2

· PVM4A

pppC01

R50E.pdf

Jul.23,2012

45

• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.