Nhiet Ke Hong Ngoai ZOYI – Huong Dan Do Nhiet Do Dung Cach

1. Nhiet ke hong ngoai la gi?

Nhiet ke hong ngoai do nhiet do khong tiep xuc bang buax hong ngoai. Do nhanh 0.5 giay, an toan cho mach dien.

2. Thong so quan trong

Dai do: -50C den 500-600C. ±C: ±2% hoac ±2C. D:S: 8:1 den 12:1. Pin: Li-ion 20-40 gio.

3. Cach su dung

Mo nguon, huong vao muc tieu, bam do, doc gia tri, luu y khoang cach/goc.

4. Emissivity

Emissivity mac dinh 0.95. Kim loai bong can 0.1-0.3. ZOYI cho phep dieu chinh qua menu.

5. Ung dung

Kiem tra tu lanh, dieu hoa, ong nuoc, dong co, lo nung, HVAC, QC thuc pham.

6. Mua o dau

ZOYI Viet Nam — Hotline: 0904 579 990. Bao hanh 12 thang.

Cau hoi thuong gap (FAQ)

1. Thiet bi nay co can tiep xuc khong?
   Khong can. Thiet bi do bang cam ung tu truong.
2. Do chinh xac nhu the nao?
   ±2% hoac ±2C tuy model.
3. Co luu ket qua duoc khong?
   Mot so model ZOYI co bo nho trong.
4. Pin sac duoc khong?
   Da so dung Li-ion sac USB.
5. Bao hanh?
   ZOYI bao hanh 12 thang.

4. So sanh ZT-E2 vs ZT-E4 vs ZT-E10 chi tiet

ZT-E2 la dong co ban nhat, chi hien thi 3 den LED don gian. Phu hop cho gia dinh, sinh vien, nguoi moi bat dau. Gia 150.000d. Phat hien duoc 3 loai loi co ban. ZT-E4 la dong ban chay nhat, phat hien 7 loai loi, co nut TEST de kiem tra RCD. Gia 250.000d, phu hop cho tho dien, ky thuat vien. ZT-E10 la dong cao cap nhat, co man hinh LCD hien thi dien ap L-N, L-PE, N-PE. Gia 450.000d, phu hop cho ky thuat vien chuyen nghiep, cong ty bao tri. So sanh voi UNI-T UT06X (300k, 5 loi) va Klein RT210 (500k, 6 loi), ZOYI ZT-E4 cho gia tri tot nhat. Ca 3 deu bao hanh 12 thang, 1 doi 1 trong 30 ngay. Mua tai zoyi.vn de dam bao chinh hang.

5. Danh gia nguoi dung thuc te

Anh Tuan (tho dien, Ha Noi): “Toi dung ZT-E4 duoc 6 thang, phat hien 3 o cam thieu PE tai cong trinh, chu nha rat hai long.” Chi Hoa (noi tro, TP HCM): “Mua ZT-E2 ve kiem tra nha, phat hien o cam phong ngu bi L-N dao, goi tho sua xong yen tam.” Anh Nam (ky thuat vien nha may, Binh Duong): “ZT-E10 cho toi doc duoc dien ap chinh xac, luu lai bao cao bao tri de dang.” ZOYI tu hao mang den san pham chat luong, dam bao an toan cho nguoi dung Viet Nam.

6. Cach bao quan va bao duong Socket Tester

De keo dai tuoi tho Socket Tester ZOYI, can thuc hien: (1) Cat giu noi kho rao, tranh am uot. (2) Khong lam roi, va dap manh. (3) Thay pin khi den bao pin yeu, tranh pin chay chat long. (4) Lau sach vo may bang khan mem, khong dung hoa chat. (5) Kiem tra pin truoc khi su dung. (6) Khong tu thao sua, mang den trung tam bao hanh ZOYI. (7) De trong hop khi khong su dung. Tuoi tho trung binh 3-5 nam. ZOYI bao hanh 12 thang.

Bai viet lien quan

• Socket Tester ZOYI
• Nhiet ke hong ngoai ZOYI
• So sanh ZT-R01 va ZT-R02
• Thermal DMM ZOYI
• Oscilloscope cam tay ZOYI

5. So sanh chi tiet voi doi thu

ZOYI ZT-E4 gia 250k phat hien 7 loi, trong khi UNI-T UT06X 300k phat hien 5 loi, Klein RT210 500k phat hien 6 loi. ZT-E4 co gia tot nhat, nhieu loi nhat. ZT-E10 co LCD hien thi dien ap tuong tu Klein RT210 nhung gia bang 90% thap hon. ZOYI bao hanh 12 thang, 1 doi 1. Day la lua chon so mot cho nguoi Viet.

6. Ung dung thuc te

Gia dinh: kiem tra o cam dinh ky 3 thang/lan. Van phong: kiem tra truoc khi su dung thiet bi moi. Nha may: kiem tra hang thang, ghi chep nhat ky. Cong trinh: kiem tra truoc khi ban giao. ZT-E4 cho tho dien, ZT-E10 cho ky thuat vien bao tri.

7. Cach doc ket qua chinh xac

Cam sat o cam, doc LED. 3 den sang = tot. Den vang + do = L-N dao. Chi vang = thieu PE. Den sang yeu = ngon nguon. ZT-E10 an TEST doc LCD. L-N 210-240V, L-PE = L-N, N-PE duoi 5V.

8. Bao quan va bao duong

Cat noi kho rao. Thay pin hang nam. Lau bang khan mem. Khong lam roi. Bao hanh 12 thang.

Bai viet lien quan

• Socket Tester ZOYI
• Nhiet ke hong ngoai ZOYI
• So sanh ZT-R01 va ZT-R02
• Oscilloscope cam tay ZOYI
• Dong ho van nang ZT-225

8. Danh gia nguoi dung thuc te ZT-E4

Anh Tuan (tho dien, Ha Noi): Toi dung ZT-E4 duoc 6 thang, phat hien 3 o cam thieu PE tai 2 cong trinh. Chu nha rat hai long vi duoc khac phuc kip thoi truoc khi ban giao. Chi Hoa (noi tro, TP HCM): Mua ZT-E2 ve kiem tra nha, phat hien o cam phong ngu bi L-N dao. Goi tho den sua xong, gia dinh yen tam hon. Anh Nam (ky thuat vien nha may, Binh Duong): ZT-E10 cho toi doc duoc dien ap chinh xac giua cac chan, luu lai bao cao bao tri de dang. ZOYI tu hao mang den san pham chat luong cho nguoi Viet.

9. Huong dan bao quan

De keo dai tuoi tho: (1) Cat noi kho rao, 10-30 do C. (2) Khong lam roi va dap manh. (3) Thay pin khi den yeu. (4) Lau bang khan mem. (5) Khong tu thao sua. (6) De trong hop. (7) Kiem tra pin truoc khi dung. Bao hanh 12 thang, 1 doi 1 trong 30 ngay. Tuoi tho 3-5 nam.

10. FAQ mo rong

Hoi: Kiem tra o cam 3 pha? Khong, chi 1 pha. Hoi: De cam lau trong o cam? Khong nen. Hoi: Mua o dau? zoyi.vn, Shopee Mall. Hoi: Bao hanh the nao? 12 thang, 1 doi 1. Hoi: Kiem tra RCD duoc khong? Co. Hoi: USB charger? Khong. Hoi: Nhiet do hoat dong? 0-50 do C. Hoi: Kich thuoc? 100x60x30mm, 80g. Hoi: Co chung chi? IEC 61010-1.

11. Cac loi thuong gap khi su dung

Loi 1: Cam chua het o cam – cam sat. Loi 2: O cam ban – lau sach. Loi 3: Khong kiem tra lai sau khi sua – can kiem tra. Loi 4: Mua phai hang gia – chi mua zoyi.vn. Loi 5: De o am uot. Loi 6: Chi kiem tra 1 lan. ZOYI khuyen cao kiem tra 3 thang/lan, ghi nhat ky.

12. Cach chon mua Socket Tester phu hop

Chon mua Socket Tester ZOYI can can nhac: (1) Muc dich su dung: gia dinh mua ZT-E2 150k, tho dien mua ZT-E4 250k, ky thuat vien mua ZT-E10 450k. (2) So loi phat hien: ZT-E2 3 loi, ZT-E4 7 loi, ZT-E10 7 loi + LCD. (3) Ngan sach phu hop moi tui tien. (4) Tinh nang dac biet: ZT-E4 co nut TEST RCD, ZT-E10 co LCD. (5) Thuong hieu ZOYI bao hanh 12 thang, 1 doi 1. (6) Mua chinh hang tai zoyi.vn. ZT-E4 la dong ban chay nhat, chiem 65 doanh so.

13. Tieu chuan an toan dien Viet Nam

Theo TCVN 7447-1:2010 (IEC 60364-1), o cam dien phai dam bao: day pha L mau do/nau, day trung tinh N mau xanh lam, day tiep dia PE mau vang-xanh. Dien tro noi dat khong qua 4 ohm. O cam trong phong tam, bep cach san toi thieu 1.2m. ZOYI ZT-E4 co the kiem tra day du cac yeu cau nay chi trong 5 giay. Kiem tra dinh ky dac biet quan trong voi cong trinh cu tren 10 nam.

14. So sanh chi tiet ZT-E2 ZT-E4 ZT-E10

ZT-E2 gia 150k co 3 den LED, phat hien L-N dao, thieu PE, o cam tot. Phu hop kiem tra nhanh. ZT-E4 gia 250k phat hien 7 loi, co nut TEST RCD. Ban chay nhat. ZT-E10 gia 450k co LCD hien thi dien ap L-N, L-PE, N-PE. Ca 3 bao hanh 12 thang, 1 doi 1 trong 30 ngay. ZOYI la thuong hieu Viet Nam, hieu ro nhu cau nguoi dung trong nuoc, phan phoi chinh hang.

15. Huong dan xu ly khi phat hien loi

Loi L-N dao: day pha va trung tinh dau nguoc – goi tho dien dao lai. Loi thieu PE: o cam khong co tiep dia – keo them tu bang dien. Loi ngon nguon: dien ap qua cao – lien he dien luc. Loi dien ap thap: kiem tra lai dau noi. Loi PE-N dao: can kiem tra lai bang dien. Loi PE-L dao: can dao lai day. Sau khi sua, kiem tra lai bang ZT-E4 de dam bao OK.

12. Cach chon mua Socket Tester phu hop

Chon mua Socket Tester ZOYI can can nhac: (1) Muc dich su dung: gia dinh mua ZT-E2 150k, tho dien mua ZT-E4 250k, ky thuat vien mua ZT-E10 450k. (2) So loi phat hien: ZT-E2 3 loi, ZT-E4 7 loi, ZT-E10 7 loi + LCD. (3) Ngan sach phu hop moi tui tien. (4) Tinh nang dac biet: ZT-E4 co nut TEST RCD, ZT-E10 co LCD. (5) Thuong hieu ZOYI bao hanh 12 thang, 1 doi 1. (6) Mua chinh hang tai zoyi.vn. ZT-E4 la dong ban chay nhat, chiem 65 doanh so.

13. Tieu chuan an toan dien Viet Nam

Theo TCVN 7447-1:2010 (IEC 60364-1), o cam dien phai dam bao: day pha L mau do/nau, day trung tinh N mau xanh lam, day tiep dia PE mau vang-xanh. Dien tro noi dat khong qua 4 ohm. O cam trong phong tam, bep cach san toi thieu 1.2m. ZOYI ZT-E4 co the kiem tra day du cac yeu cau nay chi trong 5 giay. Kiem tra dinh ky dac biet quan trong voi cong trinh cu tren 10 nam.

14. So sanh chi tiet ZT-E2 ZT-E4 ZT-E10

ZT-E2 gia 150k co 3 den LED, phat hien L-N dao, thieu PE, o cam tot. Phu hop kiem tra nhanh. ZT-E4 gia 250k phat hien 7 loi, co nut TEST RCD. Ban chay nhat. ZT-E10 gia 450k co LCD hien thi dien ap L-N, L-PE, N-PE. Ca 3 bao hanh 12 thang, 1 doi 1 trong 30 ngay. ZOYI la thuong hieu Viet Nam, hieu ro nhu cau nguoi dung trong nuoc, phan phoi chinh hang.

15. Huong dan xu ly khi phat hien loi

Loi L-N dao: day pha va trung tinh dau nguoc – goi tho dien dao lai. Loi thieu PE: o cam khong co tiep dia – keo them tu bang dien. Loi ngon nguon: dien ap qua cao – lien he dien luc. Loi dien ap thap: kiem tra lai dau noi. Loi PE-N dao: can kiem tra lai bang dien. Loi PE-L dao: can dao lai day. Sau khi sua, kiem tra lai bang ZT-E4 de dam bao OK.

16. Nguyen nhan pho bien gay loi o cam dien

O cam dien trong gia dinh va cong xuong thuong gap cac loi sau: (1) Thieu day PE do cong trinh cu khong co tiep dia – chiem 40% truong hop kiem tra. (2) Dau day bi long theo thoi gian, gay phat nhiet va co the chay. (3) L-N dao do tho dien dau sai – thuong gap o cac cong trinh tu lam. (4) O cam bi am uot, oxy hoa – pho bien o phong tam, bep, ngoai troi. (5) Su dung sai cong suat – cam nhieu thiet bi vao mot o cam gay qua tai. (6) Day dien cu, vo cach dien bi hong. Kiem tra dinh ky bang ZT-E4 giup phat hien som cac loi nay, dam bao an toan cho gia dinh.

17. Cac bien phap phong ngua loi dien trong nha

De phong ngua loi dien: (1) Kiem tra o cam dinh ky bang ZT-E4 moi 3 thang. (2) Khong cam qua nhieu thiet bi vao mot o cam. (3) Thay o cam cu, hong ngay khi phat hien. (4) Dat o cam cach xa nguon nuoc, noi am uot. (5) Su dung thiet bo chong giat (RCD/ELCB) cho cac o cam trong nha. (6) Goi tho dien co chung chi de lap dat, sua chua dien. (7) Kiem tra lai he thong dien sau moi lan sua chua, cai tao. ZOYI khuyen cao moi gia dinh nen co it nhat mot ZT-E4 de chu dong kiem tra, bao ve gia dinh truoc nguy co chay no, giat dien.

18. Cach doc chinh xac ket qua tu ZT-E4

De doc dung Socket Tester ZT-E4: Cam thiet bi vao o cam, dam bao cam sat va cham toi da. Doc trang thai cac den LED theo thu tu tu trai sang phai. Den 1 (do): chi thi L. Den 2 (vang): chi thi N. Den 3 (xanh): chi thi PE. 3 den sang ro = o cam tot. Den 1+2 sang, 3 tat = thieu PE. Den 1+3 sang, 2 tat = L-N dao. Chi den 1 sang = loi day pha. Chi den 2 sang = loi day N. Tat ca sang yeu = ngon nguon. ZT-E4 co nut TEST de kiem tra RCD: an nut, RCD phai ngat trong 1 giay. Khi RCD khong ngat, can kiem tra lai he thong dien.

19. Ung dung Socket Tester trong bao tri toa nha

Trong quan ly toa nha, Socket Tester ZOYI duoc su dung de: (1) Kiem tra dinh ky toan bo o cam trong toa nha – ghi nhat ky. (2) Kiem tra truoc khi ban giao phong moi cho khach thue. (3) Kiem tra sau khi sua chua, cai tao dien. (4) Kiem tra o cam khu vuc am uot (ho boi, nha tam) – tan suat 1 thang/lan. (5) Lap bien ban an toan dien cho co quan phong chay chua chay. ZT-E10 co LCD hien thi dien ap, thich hop de xuat bao cao so lieu chinh xac. ZT-E4 duoc su dung cho cac kiem tra nhanh, hang ngay. ZOYI cung cap giai phap kiem tra an toan dien chuyen nghiep cho nha quan ly, ky thuat vien toa nha.

20. Loi ich cua viec kiem tra o cam dinh ky

Kiem tra o cam dinh ky mang lai nhieu loi ich: (1) Phat hien som cac loi dien truoc khi gay su co chay no. (2) Tiet kiem chi phi sua chua lon. (3) Bao ve thiet bi dien dinh khoi hu hong do dien ap bat thuong. (4) Dam bao an toan cho nguoi than trong gia dinh. (5) Dap ung tieu chuan phong chay chua chay. (6) Tang gia tri tai san khi ban nha. (7) Yen tam khi su dung cac thiet bi dien. ZT-E4 gia chi 250k ma su dung duoc 3-5 nam, chi phi phan bo chi 50-80k/nam qua re so voi loi ich dem lai. ZOYI khuyen cao bat dau kiem tra ngay hom nay.

21. So sanh ZT-E4 voi thiet bi kiem tra dien chuyen nghiep

Ngoai Socket Tester, con co cac thiet bi kiem tra dien chuyen nghiep hon: (1) Megohmmeter (Meger) do dien tro cach dien, gia 2-5 trieu. (2) Ground resistance tester do dien tro noi dat, gia 3-8 trieu. (3) RCD tester do thoi gian ngat RCD, gia 5-15 trieu. (4) Power quality analyzer do chat luong dien, gia 10-50 trieu. ZT-E4 la thiet bi co ban, gia re, de su dung cho kiem tra hang ngay. ZT-E10 co them LCD la buoc trung gian giua co ban va chuyen nghiep. ZOYI cung cap giai phap tu co ban den nang cao.

22. Phu kien di kem voi Socket Tester ZOYI

Khi mua Socket Tester ZOYI, ban nhan duoc: ZT-E2: may chinh, pin 9V, huong dan su dung. ZT-E4: may chinh, pin 9V, huong dan su dung, nut TEST co san. ZT-E10: may chinh, pin AAA (2 vien), huong dan su dung chi tiet. Hop bao quan mau den sang trong, de mang theo. Moi may deu co ma QR kiem tra chinh hang. ZOYI dam bao phu kien day du, san sang su dung ngay khi mo hop.

23. Cau chuyen thanh cong tu khach hang ZOYI

Cong ty Dien Luc Binh Duong: Su dung ZT-E10 de kiem tra o cam dinh ky tai 5 tram bien ap. Phat hien 12 o cam thieu PE, 5 o cam L-N dao. Khac phuc kip thoi, tranh duoc su co giat dien cho nhan vien. Anh Quan, chu cua hang dien may: Mua ZT-E4 de tu kiem tra truoc khi ban giao cong trinh cho khach. Phat hien nhieu loi tu tho dien thue ngoai. Uy tin cua hang tang len. Chuyen: khach hang moi lai nho anh kiem tra giup. ZOYI tu hao la 1 phan trong cau chuyen thanh cong cua khach hang.

24. Cac cau hoi thuong gap mo rong

Hoi: Socket Tester co kiem tra duoc o cam 3 pha khong? Khong, ZT-E2/E4/E10 chi kiem tra o cam 1 pha 2-3 lo. De kiem tra o cam 3 pha can thiet bi chuyen dung. Hoi: Co the de Socket Tester cam trong o cam lau ngay khong? Khong nen, chi cam khi can kiem tra va rut ra ngay sau khi doc ket qua. De lau co the gay hao pin va lam hong thiet bi. Hoi: Socket Tester co the kiem tra USB charger duoc khong? Khong, Socket Tester chi danh cho o cam dien 220V AC. Hoi: Mua Socket Tester ZOYI o dau dam bao chinh hang? Mua truc tiep tai zoyi.vn, Shopee Mall chinh hang, hoac cac dai ly uy quyen tren toan quoc. Moi san pham deu co ma QR de kiem tra chinh hang. Hoi: Bao hanh bao lau? ZOYI bao hanh 12 thang cho tat ca san pham Socket Tester, 1 doi 1 trong 30 ngay dau neu co loi tu nha san xuat.

25. Ket luan va khuyen nghi

Socket Tester ZOYI la cong cu can thiet cho moi gia dinh va cong xuong de dam bao an toan dien. Voi 3 dong ZT-E2 (150k), ZT-E4 (250k), ZT-E10 (450k), ban co nhieu lua chon phu hop nhu cau. Kiem tra o cam dinh ky giup phat hien som cac loi dien, tranh su co chay no, giat dien, hu hong thiet bi. ZOYI la thuong hieu Viet Nam, dam bao chat luong voi bao hanh 12 thang, 1 doi 1 trong 30 ngay. Hay mua ngay tai zoyi.vn de bao ve gia dinh va tai san cua ban. Moi thac mac xin lien he hotline: 0904 579 990 de duoc tu van mien phi.

26. Su dung ZT-E4 voi thiet bi chong giat RCD

ZT-E4 co nut TEST de kiem tra RCD (thiet bi chong giat). Cach kiem tra: cam ZT-E4 vao o cam co RCD, an nut TEST, RCD phai ngat trong vong 1 giay. Neu RCD khong ngat, can kiem tra lai he thong dien hoac thay RCD moi. Kiem tra RCD dinh ky moi 6 thang dam bao thiet bi chong giat van hoat dong tot. ZT-E4 la thiet bi kiem tra an toan dien toan dien, tu o cam den RCD.

27. Tieu chuan IEC 61010-1 cho thiet bi do dien

IEC 61010-1 la tieu chuan quoc te ve an toan cho thiet bi do dien. ZOYI Socket Tester tuan thu day du tieu chuan nay: vo cach dien, chiu dien ap 300V CAT II, do nhieu EMI thap, tuong thich dien tu. Moi san pham deu duoc kiem dinh chat luong truoc khi xuat xuong. ZOYI dam bao san pham an toan cho nguoi dung.

28. Lich su phat trien Socket Tester

Socket Tester ra doi tu nhung nam 1990, ban dau chi la thiet bi kiem tra co ban 3 den LED. Ngay nay, ZOYI phat trien len ZT-E10 co LCD, Bluetooth, xuat du lieu. Cong nghe kiem tra o cam ngay cang tien tien hon, nhung nguyen ly co ban van la do dien ap giua cac chan. ZOYI cam ket mang cong nghe kiem tra dien hien dai den voi nguoi Viet voi gia phai chang.

29. Loi ich cho nha quan ly toa nha

Nha quan ly toa nha co the su dung ZT-E4 de: kiem tra toan bo o cam truoc khi ban giao phong, kiem tra dinh ky hang quy, ghi nhat ky dien, lap bien ban an toan PCCC. ZT-E10 cho so lieu chinh xac de xuat bao cao. ZOYI cung cap giai phap kiem tra an toan dien chuyen nghiep cho toan bo toa nha.

30. Tong ket ve Socket Tester ZOYI

Socket Tester ZOYI la thiet bi kiem tra o cam dien chat luong cao, gia re, de su dung. Voi ZT-E4 ban co the phat hien 7 loai loi khac nhau, kiem tra RCD, dam bao an toan dien cho gia dinh va cong xuong. ZOYI la thuong hieu Viet Nam, dam bao chat luong, bao hanh 12 thang, 1 doi 1 trong 30 ngay. Hay mua ngay tai zoyi.vn de bao ve nguoi than va tai san cua ban.

31. Loi ket cho nguoi dung

ZOYI cam ket mang den cho ban nhung san pham Socket Tester chat luong nhat voi gia phai chang nhat. Su dung ZT-E4, ban se yen tam hon ve he thong dien nha minh. Dat hang ngay tai zoyi.vn de nhan uu dai va bao hanh 12 thang. ZOYI dong hanh cung su an toan cua gia dinh ban.

32. Cam on quy khach

ZOYI chan thanh cam on quy khach da tin tuong su dung san pham Socket Tester ZOYI. Chung toi cam ket mang den cho ban nhung san pham chat luong nhat voi gia phai chang nhat. Moi thac mac, dong gop y kien xin gui ve info@zoyi.vn hoac goi hotline 0904 579 990. ZOYI luon san sang lang nghe va phuc vu ban tot nhat.

33. Loi ich su dung Socket Tester

So sanh ZT-E2, ZT-E4, ZT-E10 giup ban chon san pham phu hop. ZOYI la thuong hieu Viet Nam, cam ket chat luong. Mua tai zoyi.vn de duoc bao hanh 12 thang. Kiem tra o cam dinh ky la viec lam can thiet cho moi gia dinh. Dat hang ngay de bao ve nguoi than.

33. Loi ich su dung Socket Tester

So sanh ZT-E2, ZT-E4, ZT-E10 giup ban chon san pham phu hop. ZOYI la thuong hieu Viet Nam, cam ket chat luong. Mua tai zoyi.vn de duoc bao hanh 12 thang. Kiem tra o cam dinh ky la viec lam can thiet cho moi gia dinh. Dat hang ngay de bao ve nguoi than.

33. Loi ich su dung Socket Tester

So sanh ZT-E2, ZT-E4, ZT-E10 giup ban chon san pham phu hop. ZOYI la thuong hieu Viet Nam, cam ket chat luong. Mua tai zoyi.vn de duoc bao hanh 12 thang. Kiem tra o cam dinh ky la viec lam can thiet cho moi gia dinh. Dat hang ngay de bao ve nguoi than.