Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

2

GIO N S: 01 Thi gian thc hin: 05 tit Tn bi hc trc: Thc hin, ngy 13 thng 02 nm 2014

Tn bi: Bi 1. S DNG THIT B O V LINH KIN TH NG.

MC TIU CA BI: Sau khi hc xong bi ny ngi hc c kh nng: + V kin thc: - S dng thnh tho cc thit b o. - Nhn dng v c c tr s cc loi in tr, t in, cun dy.

+ V k nng: - Rn luyn k nng lm vic nhm. - Pht trin k nng quan st, t duy v suy lun.

+ V thi : - Hc tp nghim tc, tch cc, sng to, yu thch mn hc.

DNG V TRANG THIT B DY HC: - Bng, bt lng, my tnh, my chiu (nu c). - cng bi ging, ti liu hng dn. - Thit b o v linh kin in t trc quan.

I. N NH LP HC: Thi gian: 01 pht - Cho hi - Kim tra s s lp hc

II. THC HIN BI HC.

TT

NI DUNG HOT NG DY HC

THI GIAN (pht)

Hot ng ca gio vin

Hot ng ca hc sinh

1 Dn nhp Tch cc ha ngi hc

- Thuyt trnh - Pht vn Cu hi: Hy k tn cc linh kin m bn bit? - Nhn xt v nh

- Lng nghe, suy ngh v tr li

- Ch lng nghe

05 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

3

gi kin tr li - Thuyt trnh dn nhp vo bi mi

- Ch lng nghe

2 A. Hng dn ban u I. S DNG THIT B O C 4 thit b c bn: 1.1 ng h VOM c cu to c-in thng dng o 4 i lng in: - in th mt chiu (VDC) - in th xoay chiu (VAC) - in tr (Ohm) - Dng in mt chiu (mADC). Tuy VOM l thit b o c in nhng vn rt thng dng. 1.2. ng h DMM l ng h o hin th bng s, c nhiu tnh u im hn ng h VOM nh tnh a nng, chnh xc, d c kt qu, kh nng o t ng, tr khng ng vo ln ... 1.3. Dao ng k (cn gi l dao ng nghim hay my hin sng) l thit b th hin dng sng ca tn hiu, cho php o v xc nh nhiu tnh cht ca tn hiu nh: dng sng, mo, tn s, bin nh-nh, tng quan pha ... 1.4. My to tn hiu l thit b to ra tn hiu dng hnh sin hay xung vung chun c tn s v bin thay i c. My to tn hiu kt hp vi dao ng k cho php nh gi nhiu yu t ca mch nh li, mo,

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - Gii p cu hi ca hc sinh ( nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp. - t cu hi vi gio vin (nu c)

10 pht

10 pht

20 pht

10 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

4

chm tr ... Bn thit b o c bn trn c dng trong ngnh in t. Tuy nhin thc hnh in t c bn ch s dng VOM (hoc DMM). 2. VOM 2.1 u im: + nhy cao. + Tiu th rt t nng lng ca mch in c o. + Chu c qu ti. + o c nhiu thng s ca mch. 2.2. Cu to gm 4 phn chnh: + Khi ch th: dng xc nh gi tr o c: kim ch th v cc vch c khc . + Khi la chn thang o: dng la chn thng s v thang o gm chuyn mch la chn v panel ch dn la chn. + B phn hiu chnh: dng hiu chnh. + Khi cc u vo v ra: Vd: VOM hiu SUNWA model VX-360TR rt ph thng hin nay 2.3 Cc thang o: chn ng thang o cho 1 thng s cn o phi thc hin cc bc sau. + Trc khi tin hnh o phi xc nh cc thng s cn o l g? + o in p 1 chiu: chn DCV + o in p xoay chiu

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - S dng cc thit b o thc t - Gii p cu hi ca hc sinh ( nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

05 pht

10 pht

10 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

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chn ACV + o cng dng in: DCmA + o ch s in tr: + Sau xc nh khong gi tr: chn thang o. Tr s thang o chnh l tr s c th o c ln nht. o in tr(o ngui hay cn c gi l o khng c in ) + Vn nm chn thang o vo mt trong cc v tr x1, x10, x1k, x10k ... + Chp hai u que o li nu kim ch th nhy ln chnh 0 Adj (chnh 0) kim ch ng s 0 (pha phi). + Trc khi chm hai que o vo 2 im o, phi bo m gia 2 im ny khng c in th. + Chm 2 que o vo hai im in tr v c tr s trn mt chia, sau nhn vi thang o kt qu. Ch s in tr = gi tr kim ch * gi tr thang o. Vd: Chn thang o Rx10, kim ch vch ln v tr 30 v vch nh v tr 3 vch nh. Tnh nhm t 30 n 50 c 20 n v m c 10 vch nh vy mi vch l 2 n v gi tr kim ch 30 + (3x2) = 36. ch s in tr = 36x10= 360 Ch : khi o khng c chm tay vo hai u que o. Ti sao? o VDC, VAC, ADC (o nng hay o khi c cp

-Thuyt trnh, din ging. - S dng cc thit b o thc t thc hin thao tc mu - Gii p cu hi ca hc sinh ( nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st,

20 pht

20 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

6

in ): + t VOM ng chc nng cn o. + Cn xc nh gi tr cn o c bin ln nht l bao nhiu t t thang o cao gn nht. Vd: Tin on in th ti a l 12V ta nn chn thang o an ton l 25V. Trong trng hp khng tin on c ta thang o cao nht ri khi o ta ln lt h thang o xung mt cch ph hp. Lu : khi o VDC v ADC phi ch n cc tnh du + bao gi cng ni vi im c in th cao hn. II. Linh kin th ng 1. in tr 2. T in 3. Cun cm

B. Hng dn thng xuyn - Theo di, un nn cc thao tc cho hc vin - Quan tm ti cc hc vin yu, c bit - Pht hin sai xt, hng dn khc phc - Nhc nh an ton lao ng thng xuyn

-Thuyt trnh, din ging. - S dng cc thit b o thc t thc hin thao tc mu - Gii p cu hi ca hc sinh ( nu c)

-Thuyt trnh, din ging. - S dng cc linh kin thc t hng dn cch o, c gi tr - Gii p cu hi ca hc sinh ( nu c)

- Thc hin li thao tc mu cho hc sinh

ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp.

- t cu hi vi gio vin (nu c)

-Lng nghe, quan st, ghi chp. - t cu hi vi gio vin (nu c)

30 pht

120 pht

3 Cng c kin thc v kt thc bi - Nhan xet buoi thc tap - Thao tac cua hoc vien - Chap hanh gi giac, qui nh xng thc tp. - V sinh xng thc tp

Thuyt trnh, din ging

Lng nghe, Ghi chp T duy pht biu

Thc hin theo phn cng

10 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

7

4 Hng dn t hc n li kin thc hc 05 pht III. RT KINH NGHIM T CHC THC HIN: ................................................................................................................................................

................................................................................................................................................

TRNG KHOA

inh Cng Sang

Nhn trch, ngy 10 thng 02 nm 2014 GIO VIN

V Cng Chnh

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

14

GIO N S: 04 Thi gian thc hin: 05 tit Tn bi hc trc: S dng thit b o v linh kin th ng Thc hin, ngy 06 thng 03 nm 2014

Tn bi : K THUT XI HN V THIT K MCH IN

MC TIU CA BI: Sau khi hc xong bi ny ngi hc c kh nng: + V kin thc: - Bit c cc k thut c bn trong vic xi hang v thit k mch in.

+ V k nng: - Rn luyn c tnh kin ch, cn thn.

+ V thi : - Hc tp nghim tc, tch cc, sng to, yu thch mn hc.

DNG V TRANG THIT B DY HC: - Bng, phn, my tnh, my chiu. - cng bi ging, ti liu hng dn. - Linh kin in t trc quan.

I. N NH LP HC: Thi gian: 01 pht - Cho hi - Kim tra s s lp hc

II. THC HIN BI HC.

TT

NI DUNG HOT NG DY HC

THI GIAN (pht)

Hot ng ca gio vin

Hot ng ca hc sinh

1

Hng dn m u K thut lm mch in

- Trnh chiu video clip hng dn k thut lm mch in - Thuyt trnh, ging gii cc im cn lu

- Quan st, lng nghe, ghi chp

- t cu hi cho gio vin (nu c)

30 pht

Trng Trung Cp K Thut Cng Nghip Nhn Trch Khoa in in Lnh

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2

Thao tc mu

trong qu trnh lm mch in - Gii p thc mc ca hc sinh - Thc hin tao tc mu theo cc bc hng dn

- Quan st, ch thc hnh

15 pht

3 Hng dn thng xuyn Theo di, un nn cc thao tc cho hc sinh - Quan tm ti cc hc sinh yu, c bit - Pht hin sai xt, hng dn khc phc Nhc nh an ton lao ng thng xuyn

- Sau khi GV hng dn c th pht sinh tnh hung s c v GV hng dn v cch khc phc

- Quan st v ch thc hnh

140 pht

3 Cng c kin thc v kt thc bi - Nhan xet buoi thc tap - Thao tac cua hoc vien - Chap hanh gi giac, qui nh xng thc tp. - V sinh xng thc tp

Thuyt trnh, din ging

Lng nghe, Ghi chp T duy pht biu

Thc hin theo phn cng

15 pht

4 Hng dn t hc

n li kin thc hc

05 Pht

III. RT KINH NGHIM T CHC THC HIN: ................................................................................................................................................

................................................................................................................................................

TRNG KHOA

inh Cng Sang

Nhn trch, ngy 03 thng 03 nm 2014 GIO VIN

V Cng Chnh