1.1application:this specification is applied to potentiometers used for electronic equipment.
1.2standard atmospheric conditions：
unless otherwise specified,the standard range of atmospheric conditions for making measurements and test is per the following limits:
ambient temperature ：15℃ to 35℃
relative humidity ： 25% to 75%
air pressure ： 86 kpa to 106 kpa
1.3operating temperature range ：-20℃ to +50℃
1.4storage temperature range ：-15℃ to +70℃
1.5suggested storage period ：about 6 months
2．electronic specification :
measurement shall be made by the resistance between terminal 1 and 3 with lever settled at terminal 1 or 3.
measurement shall be made by the resistance law method.measurement stall be made at the position of right diagram from the edge at the side of terminal 1.when based on terminal 3. from the edge at the side of terminal 3.
out voltage between terminals1and2
--------------------------------------------------- x 100%
applied voltage between terminals 1and 3
power rating is based on continuous full load operation at the maximum voltage between 1 and 3. power ratingvs .ambient temperature shall be denoted on the following graph.
rated voltage e=√p.r (v)
p: power rating
r: nominal total resistance
when the rated voltage exceeds the maximum operating voltage, the maximum operating voltage shall be the rated voltage
ac 200 v
dc 20v,when the rated voltage is 20v or less, its rated voltageshall be applied to the terminals between 1 and 3.and then the procedures, refer to iec 393-1-4.15 traveling speed:20=/sec
less than 47mv
a voltage of 500vac shall be applied for1min,after which measurement shall be made
100 mωor more
trip curr ant:2ma measuring frequency:50/60hz
500v ac for 1min.
without damage to parts,
arcing or breakdown etc
ac 100v 5a
less than 50mω
3. mechanical specification :
total rotation angle
15,000 cycles min
4. soldering conditions
4.1 manual soldering :
temperature of soldering iron ：300℃or less.
application time of soldering iron :within 3s.
4.2 dip soldering
printed wiring board: single-sided copper clad laminate board with thickness of 1.6mm .
specific gravity: 0.82 or more.
flux shall be applied to the board using a bubble foaming type fluxer.
the board shall be soaked in the flux bubble only to the middle of its thickness.
flux shall not come into contact with the component side surface.
surface temperature of board: 100℃or less.
preheating time : within 2 min.
solder temperature : 260℃less.
immersion time: within 3 s.
4.3 apply the above soldering process for 1 or 2 times.
5. matters needing attention
5.1 high temperature high humidity or corrosive gases are prohibited in storage.
5.2 keep the principle of “first come, first use”.
5.3 the best way is to use the potentiometer as a four-terminal element for adjusting voltage of voltage divider. for wiring, you’d better choose terminal “1”for grounding and r1 (the load resistance of
the potentiometer) should be not smaller than ten times as rt (see figure 2a).
except for special design requirement, the potentiometer shouldn’t be used as a two-terminal rheostat. the contact resistance between the resistor and the contact piece will hinder the passing of big electric current, at the sane time, the current at the moving contact may be too big since only par of the effective travel is in function and lead to local over loading then failure of the unit.(see figure 2b).
5.4 when the potentiometer is used as current regulator in dc circuit, dc current will pass the sliding arm thus resistance value will rise abnormally because of anodic oxidation. in this case, in this case, it is recommended to connect the leading-out terminal of the resistor to the cathode and that of the sliding arm to anode.(see figure3c)
■dimensions尺寸图/p.c.b.mounting hole detail 线路板安装孔尺寸图