本文讨论了电阻箱和拨码电阻器的精度，为今后的实验做好了数据准备。

■ 电阻箱

使用 TB上的电阻箱便于电子实验。但是，在使用过程中需要考虑这种低价电阻箱的误差。本文用数字万用表初步测量电阻，检查电阻箱的实际误差。

^{▲ 教学电阻100的教学电阻箱}

打开电阻箱内部，可以看到

^{▲ 低价电阻箱0~99999Ω}

◎ 电阻箱型号：

下表显示了不同类型雨水潺潺显示组织的大小：

01测量电阻箱各档电阻

1.电阻箱的电阻

电阻箱1的测量结果：

C1	C2	C3	C4	C5	C6	C7	C8	C9
0.94	1.06	1.17	1.25	1.35	1.45	1.55	1.65	1.73
1.85	2.85	3.85	4.86	5.83	6.83	7.83	8.82	9.82
10.84	20.77	30.74	40.72	50.60	60.60	70.53	80.51	90.47
100.26	199.89	299.19	398.77	499.99	599.49	699.09	798.40	897.97
994.43	1991.60	2989.80	3989.20	4979.50	5973.00	6970.60	7969.00	8968.00
10067.00	20102.00	30127.00	40145.00	49917.00	60008.00	70078.00	80048.00	90042.00

电阻箱2测量结果

C1	C2	C3	C4	C5	C6	C7	C8	C9
1.00	1.10	1.22	1.32	1.40	1.49	1.60	1.71	1.79
1.91	2.90	3.92	4.91	5.89	6.90	7.89	8.90	9.88
10.91	20.86	30.83	40.84	50.73	60.73	70.69	80.66	90.66
100.31	199.92	299.36	399.23	499.30	598.73	698.36	797.81	897.69
998.84	1997.70	2997.60	3996.30	5003.30	6000.90	7000.50	7999.80	8998.30
10016.00	20041.00	30078.00	40097.00	49919.00	59937.00	69991.00	79971.00	90023.01

电阻箱3 测量结果

1.455000

R1	R2	R3	R4	R5	R6	R7	R8	R9
0.809000	1.311000	1.450000	1.451000	1.457000	1.455000	1.450000	1.452000
1.792000	2.804000	3.825000	4.848000	5.941000	6.932000	7.969000	8.972000	9.983000
10.638000	20.474001	30.285999	40.068001	51.726002	61.497002	71.335999	81.158997	90.918999
98.237000	196.059998	294.980011	391.170013	509.670013	607.140015	704.950012	803.760010	900.039978
1001.899902	2005.300171	3009.500000	4001.800293	5065.899414	6066.500000	7069.799805	8074.099609	9066.299805

电阻箱4 测量结果

R1	R2	R3	R4	R5	R6	R7	R8	R9
1.97	2.90	3.89	5.39	5.86	6.83	8.13	8.83	9.81
11.10	20.94	31.91	42.27	50.83	61.26	71.20	82.43	90.43
101.88	201.35	301.04	404.93	500.49	600.60	698.44	798.06	897.53
998.21	1996.30	2994.70	3992.10	4974.30	5971.70	6969.80	7968.30	8965.00

#!/usr/local/bin/python
# -*- coding: gbk -*-
#============================================================
# METERREC.PY -- by Dr. ZhuoQing 2020-07-06
#
# Note:
#============================================================

from headm import *
import os
from tsmodule.tsstm32       import *
from tsmodule.tsvisa        import *

#------------------------------------------------------------
def tspclickaction(func1=None, func2=None):
    def f1():
        tspmsg('msg \a')

    def f2():
        printf('\a')

    if func1 == None:
        func1 = f1

    if func2 == None:
        func2 = f2
    #--------------------------------------------------------
    codeflag = 0

    while True:
        if codeflag == 0:
            time.sleep(.5)
        else: time.sleep(.2)

        key = tspread()

        if key[7]+key[8]+key[9] != 0:
            return

        if key[2] != 0 and codeflag == 0:
            if key[3] != 0: return

            func1()
            codeflag = 1
            continue

        if key[3] != 0 and codeflag == 0:
            if key[2] != 0: return

            func2()
            codeflag = 1
            continue

        codeflag = 0

#------------------------------------------------------------
windowtitle = tspgetwindowtitle()
findflag = 0

meterfile = r'D:\zhuoqing\window\cb\MyResearch\Test\TestAD5344\M8BL_BAS\M8BL_BAS.exe'

for wt in windowtitle:
    if wt.find('MEGA8 DOWLOAD PROGERAM') >= 0:
        findflag = 1
        break

if findflag == 0:
    os.system(meterfile)
    time.sleep(.5)
    tspbeep(1200, 200)

#------------------------------------------------------------
meterid = 0
decimalnum = -1

if len(sys.argv) > 1:
    meterid = int(sys.argv[1])

if len(sys.argv) > 2:
    decimalnum = int(sys.argv[2])

if meterid > 3:
    dm3068open()

def ff1():
    global decimalnum

    dn = decimalnum
    
    if dn == 0:
        if meterid < 4:
            meter = meterval()
            tspmsg('%d '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%d '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%d '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%d '%val)
            else:
                val = dm3068vdc()
                tspmsg('%d '%val)
    elif dn == 1:
        if meterid < 4:
            meter = meterval()
            tspmsg('%3.1f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%3.1f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%3.1f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%3.1f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%3.1f '%val)
    elif dn == 2:
        if meterid < 4:
            meter = meterval()
            tspmsg('%4.2f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%4.2f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%4.2f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%4.2f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%4.2f '%val)
    elif dn == 3:
        if meterid < 4:
            meter = meterval()
            tspmsg('%5.3f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%5.3f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%5.3f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%5.3f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%5.3f '%val)
    elif dn == 4:
        if meterid < 4:
            meter = meterval()
            tspmsg('%6.4f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%6.4f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%6.4f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%6.4f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%6.4f '%val)
    elif dn == 5:
        if meterid < 4:
            meter = meterval()
            tspmsg('%7.5 '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%7.5f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%7.5f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%7.5f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%7.5f '%val)
    elif dn == 6:
        if meterid < 4:
            meter = meterval()
            tspmsg('%8.6f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%8.6f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%8.6f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%8.6f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%8.6f '%val)
    elif dn == 7:
        if meterid < 4:
            meter = meterval()
            tspmsg('%9.7f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%9.7f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%9.7f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%9.7f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%9.7f '%val)
    elif dn == 8:
        if meterid < 4:
            meter = meterval()
            tspmsg('%10.8f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%10.8f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%10.8f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%10.8f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%10.8f '%val)
    else:
        if meterid < 4:
            meter = meterval()
            tspmsg('%f '%meter[meterid])
        else:
            if meterid == 4:
                val = dm3068vdc()
                tspmsg('%f '%val)
            elif meterid == 5:
                val = dm3068vac()
                tspmsg('%f '%val)
            elif meterid == 6:
                val = dm3068res()
                tspmsg('%f '%val)
            else:
                val = dm3068vdc()
                tspmsg('%f '%val)

    tspbeep(2000, 200)

#------------------------------------------------------------
time.sleep(.5)
tspbeep(1000, 500)

tspclr()

#------------------------------------------------------------
tspclickaction(ff1)

tspmsgcopy()

tspbeep(500, 200)

#------------------------------------------------------------
# END OF FILE : METERREC.PY
#============================================================

2.拨码电阻

^{▲ 拨码电阻器}

拨码电阻器1

R1	R2	R3	R4	R5	R6	R7	R8	R9
39980.00	20093.00	13374.00	9987.00	7991.40	6671.70	5718.50	5031.20	4469.10
403340.00	199470.00	133270.02	100900.00	80412.00	66801.00	57292.00	49837.00	44350.00
4026599.75	1996000.00	1334900.00	1011900.00	808410.00	670470.00	575380.00	502790.00	447109.97

拨码电阻2

R1	R2	R3	R4	R5	R6	R7	R8	R9
39805.00	19877.00	13255.00	9989.00	7988.10	6650.80	5698.90	5004.40	4445.90
402200.00	201010.00	134039.98	100520.00	80308.00	66955.01	57395.00	49781.00	44289.00
3983200.00	2013400.12	1337800.00	999200.00	798880.00	668320.00	572090.06	505680.00	448850.00

^{▲ 拨码电阻的阻值}

#!/usr/local/bin/python
# -*- coding: gbk -*-
#============================================================
# TEST2.PY -- by Dr. ZhuoQing 2020-07-04
#
# Note:
#============================================================
from headm import *
R1 = [39805.00, 19877.00, 13255.00, 9989.00, 7988.10, 6650.80, 5698.90, 5004.40, 4445.90]
R2 = [402200.00, 201010.00, 134039.98, 100520.00, 80308.00, 66955.01, 57395.00, 49781.00, 44289.00]
R3 = [3983200.00, 2013400.12, 1337800.00, 999200.00, 798880.00, 668320.00, 572090.06, 505680.00, 448850.00]
#printff(R1, R2, R3)
plt.plot(R1, label='R1')
plt.plot(R2, label='R2')
plt.plot(R3, label='R3')
plt.xlabel("Sample")
plt.ylabel("Resistor(Ohm)")
plt.grid(True)
plt.legend(loc='upper right')
plt.show()
#------------------------------------------------------------
# END OF FILE : TEST2.PY
#============================================================

3. 拨码电阻建模

这个电阻应该是用于现场控制应用，通过电压产生一个线性变化的电流。

假设测量的 R n R_n Rn，在激励电压 U 1 U_1 U1激励下，产生线性增加的电流 I n I_n In。假设模型为：

^{▲ 对应用进行建模}

利用上面所测量的R1,R2,R3来估计U1,R0,I0,I1。由于所能够使用到数据只有九个，所以预先假设： U 1 = 22 U_1 = 22 U1=22。得到对应的参数： R 0 = 5 . 29276323 e 03 {\rm{R}}_0 {\rm{ = 5}}{\rm{.29276323e03 }} R0=5.29276323e03 I 0 = 5 . 49295798 e − 04 {\rm{I}}_0 {\rm{ = 5}}{\rm{.49295798e - 04 }} I0=5.49295798e−04 I 1 = 4 . 16442321 e − 03 {\rm{I}}_1 {\rm{ = 4}}{\rm{.16442321e - 03}} I

标签：电阻4000 电阻698

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1.电阻箱的电阻

2.拨码电阻

3. 拨码电阻建模

详细介绍电流互感器功能区别3CT SR ZCT

低价电阻箱-阻值测试

■ 电阻箱

01测量电阻箱各档电阻

1.电阻箱的电阻

2.拨码电阻

3. 拨码电阻建模

详细介绍电流互感器功能区别3CT SR ZCT

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