PRECISION DC VOLTMETER DM7276

1. 5 ,6,2 2 7 7 5
SSP '& 9ROWPHWH
IR 5 ' WR RGXFWLR /L HV
3UHFLVLR & 9ROWPHWHU
L LW

4. * DUD WHHV URDGH HG E
+L FF UDF 0HDV UHPH W
G D FHG SSOLFDWLR V
7 D VLH W &KD DFWH LVWLFV R LWR
L 7HVW
7HPSH DWX H &RPSH VDWLR )X FWLR
Precision for measuring a 4 V battery at 48 μV accuracy
+ Increased ef ciency using stable measurements with 1-year accuracy
6LPXOWD HRXV 7HPSHUDWXUH 0HDVXUHPH W 'LVSOD R YHUWHG 9ROWD H L 6WD GDUG 7HPSHUDWXUH
' 9ROWD H 0HDVXUHPH W 5HVLVWD W WR 1RLVH +L K VSHHG 6DPSOL 0RGH 8S WR PVHF WLPHV
)RU WHVWV OLNH 2 9 2SH LUFXLW 9ROWDJH DJL J WHVWV IRU
EDWWHULHV Z HUH PL XWH YROWDJH F D JHV DUH PR LWRUHG RYHU
D OR J WLPH WR PDNH D SDVV IDLO MXGJPH W W H DFFXUDF D G
OR J WHUP VWDELOLW RI W H PHDVXUL J L VWUXPH W DUH HVVH WLDO
7 H '0 D G '0 DUH X SUHFHGH WHG ' 9ROWPHWHUV
W DW H VXUH DFFXUDF R W H FDOLEUDWLR GHYLFH FODVV IRU R H
HDU
6L FH RX GR W HHG D FRPSOH V VWHP W DW FR VLGHUV
FDOLEUDWLR WLPL J HYH IRU OR J WHUP GDWD DFTXLVLWLR VXF
DV IRU DJL J WHVWV RX FD HDVLO XVH LW L ODERUDWRULHV ,
SURGXFWLR ZRUN W HVH GHYLFHV VLPSOLI DVVHPEO OL H GHVLJ
D G LPSURYH V VWHP UHOLDELOLW
The OCV for lithium-ion batteries can uctuate by several dozen
μV if the ambient temperature uctuates by even 1°C (1.8°F).
)RU PHDVXUHG REMHFW V ZLW W LV NL G RI WHPSHUDWXUH
F DUDFWHULVWLF RX FD XVH W H WHPSHUDWXUH FRPSH VDWLR
IX FWLR WR GLVSOD D YDOXH FR YHUWHG L WR D VWD GDUG
temperature voltage from the registered temperature coef cient.
7 LV LV D HZ DSSURDF PDGH SRVVLEOH E W H ' YROWPHWHU
'0 6HULHV Z LF FD PHDVXUH ERW WHPSHUDWXUH D G YROWDJH
VLPXOWD HRXVO
7 H L J V S H H G V D P S O L J P R G H
PHDVXUHPH W FRX W VHWWL J IX FWLR FD
PHDVXUH FR WL XRXVO XS WR WLPHV SHU
WULJJHU RX FD DOVR F D JH W H L WHJUDWLR
WLPH IURP W H IDVWHVW VHWWL J RI PVHF
7 LV PDNHV LW HDV WR DFTXLUH GDWD IRU
PHDVXUHPH WV Z LF RLVH PDGH GLIILFXOW
IRU ZDYHIRUP UHFRUGL J IURP D +LRNL 0HPRU
+L RUGHU RU RVFLOORVFRSH VXF DV EDWWHU
F DUJH GLVF DUJH SURSHUWLHV
7HPSHUDW UH &RPSH VDWLR IRUP OD 9 90/(1+α(T-T
90 9ROWD H PHDV UHPH W DIWHU 18 FDOF ODWLR 7 0HDV UHG WHPSHUDW UH
7 6WD GDUG WHPSHUDW UH
([DPSOH DFTXLVLWLR WLPH XVL PHDVXUHPH W
FRX W VHWWL IX FWLR WLPHV
([DPSOH ' ,5 WUH G GLVSOD
9
9
DUVBM WBMVF 7.
4UB OEBSE UFNQFSBUVSF
DPOWFST PO WBMVF 7
6WD GDUG
WHPSHUDWXUH 7
0HDVXUHG
WHPSHUDWXUH 7
9ROWD
H
9
, WH UDWLR WLPH
FTXLVLWLR WLPH
+] +]
PV V V
PV PL V PL V
) 67 3/ PL V PL V
0(' 3/ PL V PL V
.BLF BTTVSFE VEHNFOUT X UI
NQSPWFE BDDVSBD BOE SFTPMVU PO
GG DVMU UP HSBTQ UIF SFBM WBMVF
BN E TP NVDI WBS BC M U
H OH U NF EB T
BUB GPS OPO EFGFDU WF
QSPEVDUT
.FBTVSFE WBMVFT
7PMUBHF

6. )URP 5 WR 3URG FWLR L HV
5LF , WHUIDFH WR 6 SSRUW L HUVH 6LW DWLR V
7KH '0 D G '0 DUH ' 9ROWPHWHUV WKDW GHOLYHU RW R O PHDVXUHPH W DFFXUDF EXW DOVR SROLVKHG RSHUDELOLW
D G H[WH VLYH YHUVDWLOLW
, DGGLWLR WR WKH XVHU L WHUIDFH ZKLFK XVHV D UHVLVWLYH WRXFK SD HO WKDW V XVHIXO R VLWH WKH DOVR IHDWXUH D FRPSOHWH
FRPPX LFDWLR L WHUIDFH IRU OL NL ZLWK H[WHU DO GHYLFHV
'LVSOD V XS WR GDWD LWHPV ZLWK D L WH UDWLR WLPH IURP PVHF WR
PVHF RX FD DOVR XVH WKH WUH G GLVSOD WR HDVLO FKHFN GDWD L FOXGL
OR WHUP GDWD RU GDWD ZLWK DEUXSW FKD HV VXFK DV WUD VLH W SURSHUWLHV
7KLV GL LWDO YROWPHWHU L FOXGHV D FRPSDUDWRU
ZKLFK VHWV XSSHU D G ORZHU OLPLW YDOXHV D G D
%,1 IX FWLR ZKLFK FDWH RUL]HV WH SDLUV RI XSSHU
D G ORZHU OLPLW YDOXHV 7KH VFUHH FKD HV FRORU
GHSH GL R WKH UHVXOWV VR RX FD UHVW DVVXUHG
HYH ZKH FKHFNL UHVXOWV YLVXDOO
V VRR DV WKH PHDVXUHG YDOXH VWDELOL]HV LW LV DXWRPDWLFDOO PDL WDL HG
, DGGLWLR WR EDVLF L IRUPDWLR VXFK DV WKH PD[LPXP PL LPXP D G
DYHUD H YDOXHV RX FD DOVR GLVSOD L IRUPDWLR YLWDO WR SURGXFWLR VXFK DV
VWD GDUG GHYLDWLR RU SURFHVV FDSDELOLW L GLFHV
RX FD GLVSOD D EDU UDSK OLNH D D DOR PHWHU WR PDWFK WKH VWD GDUG PHDVXUHG
YDOXH GLVSOD 6PRRWKL GLVSOD V WKH PHDVXUHG YDOXH V PRYL DYHUD H WR
WLPHV
RX FD FKD H WKH XPEHU RI GLVSOD HG GL LWV WR GL LWV D G WKH GDWH WR PDWFK
WKH VLWXDWLR D G UH LR RI XVH KD H WR D VLPSOH GLVSOD WKDW VKRZV R O WKH
YROWD H D G WHPSHUDWXUH RU FKD H WKH GLVSOD WR PDWFK XPHULFDO GLVSOD V RI
FRX WULHV WKDW XVH SHULRGV RU FRPPDV IRU WKH GHFLPDO SRL W
(DFK VHWWL LV VDYHG L WHU DOO DV SD HO GDWD 8S WR
+LRNL SURYLGHV D IUHH DSSOLFDWLR WKDW XVHV 86% FRPPX LFDWLR WR DFTXLUH GDWD
PHDVXUH L WHUYDOV WHVW FRPPX LFDWLR ORDG DFTXLUHG GDWD L WR ([FHO D G RXWSXW
acquired data into a CSV le. A multi-function software application, it can also link
ZLWK H[WHU DO WUL HUV
'RZ ORDG LW IRU IUHH IURP WKH +LRNL ZHEVLWH DW ZZZ KLRNL FRP
9ROWD H 7 H G 'LVSOD
& SSOLFDWLR
&RPSD DWR ,
XWR ROG
6WDWLVWLFV 'LVSOD
D DSK 6PRRWKL
&XVWRPL]HG 'LVSOD D G D HO 6D L
5SFOE E TQMB
4UBU TU DT E TQMB
/ GVODU PO
VUP IPME DPNQBSBUPS CBS HSBQI TNPPUI OH
7PMUBHF BOE UFNQFSBUVSF T NQMF E TQMB
VTUPN FE E TQMB

7. RX FD XVH WKH UHDU SD HO V VZLWFK WR VHOHFW HLWKHU
WKH 131 W SH ZKLFK VXSSRUWV VL N RXWSXW RU WKH
313 W SH ZKLFK VXSSRUWV VRXUFH RXWSXW IRU WKH
L SXW VL DO SRODULW WR PDWFK WKH SUR UDPPDEOH
FR WUROOHU V FRPPR SRODULW
7 PV RU PRUH 7 PV RU PRUH
7 PV RU OHVV 7UL HU GHWHFWLR WLPH
7 R WDFW FKHFN L WH UDWLR WLPH PV
7 7UL HU GHOD WLPH
7 FTXLVLWLR WLPH 6HH KDUW R OHIW
7 DOFXODWL WLPH PV 7 PV RU PRUH
0R LWRU WKH / 1 86% 56 D G *3 ,% WUD VPLVVLR FR WH WV R
WKH SD HO RPPX LFDWLR FRPPD GV VXSSRUW 6 3, SUR UDPPL VR RX
FD HDVLO UHSODFH D H HULF PXOWLPHWHU
7KLV GHYLFH VXSSRUWV V VWHP FR VWUXFWLR ZLWK LWV EXLOW L OR IX FWLR
ZKLFK VDYHV FRPPX LFDWLR FR WH W WR 86% PHPRU
KH GHVL L D FR W RO V VWHP XVL D H[WH DO L WH IDFH EH VX H WR HDG WKH L VW XFWLR PD XDO D G FKHFN WKH WHFK LFDO L IR PDWLR
3UL WHU
GDSWHU )RU XVH L -DSD
GDSWHU )RU XVH L W H (8
5HFRUGL J 3DSHU P IW UROO
R HFWLR DEOH DEOH OH JW P IW
56 DEOH SL SL FURVV P IW
*3 , R HFWRU DEOH RUG OH JW P IW
86 DEOH / RUG OH JW P IW
/ 1 DEOH RUG OH JW P IW
( 7 , 2 , WHUIDFH
RPPX LFDWLR 0R LWRU /RJ )X FWLR
)OH LEO 6XSSRUWV R HFWLR V WR RPSXWHUV RU R WUROOHUV
3UL WHU R HFWLR
'0 D G '0 R O
2SWLR V &RPPX LFDWLR FDEOH 2SWLR V L WH
*3 ,% L WHUIDFH
'0 D G '0 R O
RPPX LFDWLR
PHW RG
,((( FRPSOLD W
, WHUIDFH IX FWLR
6+ + 7 / 65 5/ 33 ' '7
GGUHVVHV WR
56 L WHUIDFH
'0 D G '0 R O
R HFWRU SL ' VXE PDOH FR HFWRU ZLWK L FK VFUHZV
RPPX LFDWLR
PHW RG
)XOO GXSOH[ VWDUW VWRS V FKUR L]DWLR VWRS ELW RI IL[HG GDWD
length of 8 ( xed), no parity, no ow control
RPPX LFDWLR V
VSHHG
ESV ESV ESV
/ 1 L WHUIDFH
R HFWRU RJ-45 connector × 1
(OHFWULFDO
speci cations
,((( FRPSOLD W
7UD VPLVVLR PHW RG %DVH 7 %DVH 7; DXWRPDWLF GHWHFWLR
3URWRFRO 7 3 ,3
)X FWLR V 6HWWL D G PHDVXUHPH W XVL FRPPX LFDWLR FRPPD GV
86% 'HYLFH
R HFWRU 6HULHV % UHFHSWDFOH
(OHFWULFDO
speci cations
86% )XOO VSHHG
ODVV
' FODVV 20 PRGH
+,' FODVV 86% NH ERDUG PRGH
86% KRVW )ODVK GULYH
R HFWRU 7 SH FR HFWRU
6DYL J PHDVXUHG
YDOXHV
6DYHV WKH FXUUH W PHDVXUHG YDOXH E SUHVVL WKH V VWHP V 6 9(
EXWWR D G VDYHV D VFUHH FDSWXUH
6DYHV DOO GDWD RI WKH PHDVXUHG YDOXH PHPRU IURP WKH )LOH 2SHUDWLR V
6FUHH
)LOH RSHUDWLR 6DYH ORDG VHWWL V 'HOHWH KD H DPH 'LVSOD FDSDFLWD FH
Supported USB ash
GULYHV
0DVV 6WRUD H ODVV 9) 7 RW VXSSRUWHG XS WR *%
7KHUPDO VHULDO GRW PHWKRG
PP
FSV
' 37(5 RU WKH L FOXGHG LFNHO K GULGH EDWWHULHV
KDU HG XVL WKH D SUL W DSSUR[ OL HV ZKH IXOO
FKDU HG
SSUR[ PP L : PP L + PP L
' R]
3UL WL J PHW RG
3DSHU ZLGW
3UL WL J VSHHG
3RZHU VXSSO
'LPH VLR V D G
PDVV
(;7 , 2 6L DO /LVW 6XSSRUWV , 2 7HVW )X FWLR V
R HFWRU
SL ' VXE IHPDOH FR HFWRU ZLWK L FK VFUHZV
, SXW 3 RWRFRXSOHU LVRODWHG R YROWDJH FR WDFW L SXW
75,* .( B/2 . 35,17 /2 ' WR /2 '
2XWSXW 3 RWRFRXSOHU LVRODWHG RSH GUDL RXWSXW
(20 (55
:LWK %,1 IX FWLR 21 %,1 WR %,1 2%
:LWK %,1 IX FWLR 2)) 287 WR 287 +, ,1 /2
131 313
6ZLWF
5H VLV WL H WRX FK S D H O
H VX HV RSH DELOLW H H
KH HD L OR HV
( 7 , 2 7(67 6F HH
FT LVLWLR WLPH 7 3RZHU V SSO IUHT H F
, WH UDWLR WLPH VHWWL + +
) 67 3 & PV PV
0( 3 & PV PV
6 2: 3 & V V
2W HU , WH UDWLR WLPH PV
53 (
.FBTVSF
QSPDFTT OH
0.
FD T PO
T HOBMT
5 5
0/
0/
0/ 0
0
0
0
0
0
POUBDU
DIFDL
FMB .FBTVS OH BMDVMBU OH
5 5 5 5 5 5
(;7 , 2 WLPL ([WHU DO WUL HU (20 RXWSXW +2/'

8. , J NJ
6 EB /B B B B
IUU T IJ J D N
3 6 :
P P P P N P N P
' '
5D JH 'LVSOD UD JH 0D UHVROXWLR , SXW UHVLVWD FH 0HDVXUHPH W DFFXUDF 0HDVXUHPH W DFFXUDF
P9 P9 9 10 GΩ or more/10 MΩ±1% ±0.0030% rdg. ±2 μV ±0.0015% rdg. ±2 μV
P9 P9 9 10 GΩ or more/10 MΩ±1% ±0.0020% rdg. ±3 μV ±0.0011% rdg. ±3 μV
9 9 1 μV 10 GΩ or more/10 MΩ±1% ±0.0020% rdg. ±12 μV ±0.0009% rdg. ±12 μV
9 9 10 μV 10 MΩ±1% UG P9 UG P9
9 9 100 μV 10 MΩ±1% UG P9 UG P9
7HVW OHDG FRPEL DWLR
7HVW OHDG R WDFW VHFWLR
-
10 μV
217 7 3,1 - 10 μV
60 // //,* 725 /,3 - 7 μV
7HVW OHDG FRPEL DWLR
R HFWLR FDEOH ( WH VLR FDEOH R WDFW VHFWLR
-
2 μV
-
3 μV
7(67 3,1 - 10 μV %86 % 5 /,3 - 5 μV
//,* 725 /,3 - 7 μV *5 %%(5 /,3 - 5 μV
0HDVXUHPH W UD JH 0HDVXUHPH W DFFXUDF 0HDVXUHPH W WLPH
WR ) WR )
) WR ) WR ) ) WR ) WR ) H[FOXGL WKH SUHYLRXV UD H
) WR ) WR )
PV PV
0HDVXUHPH W SDUDPHWHUV DC voltage (ΣΔ conversion method), Temperature (when using the Z2001 thermistor sensor)
FFXUDF JXDUD WHH WHPSHUDWXUH D G XPLGLW UD JH ) 5+ RU OHVV KRXU ZDUP XS
0HDVXUHPH W VXSSRUW IX FWLR V 6PRRWKL IX FWLR 1XOO WHPSHUDWXUH FRPSH VDWLR VFDOL RYHU UD H GLVSOD VHOI FDOLEUDWLR DXWR KROG FR WDFW FKHFN
0D DJHPH W VXSSRUW IX FWLR V RPSDUDWRU %,1 DEVROXWH YDOXH MXG PH W ODEHO GLVSOD VWDWLVWLFV PHDVXUHPH W L IRUPDWLR FRPPX LFDWLR PR LWRU (;7 , 2 7(67
, WHJUDWLR WLPH , WH UDWLR WLPH X LW 3/ PV 3/ VHWWL PV VHWWL PV WR PV
R WDFW F HFN KHFN VL DO P9UPV WKUHVKROG YDOXH ) WR ) D RW XVH L WKH 9 9 UD HV R WDFW FKHFN L WH UDWLR WLPH PV WR PV
, WHU DO PHPRU GDWD SRL WV YROWD H WHPSHUDWXUH HODSVHG WLPH SD HO GDWD SRL WV
6WDWLVWLFV
0D[ RI GDWD SRL WV 0D[LPXP YDOXH PL LPXP YDOXH DYHUD H YDOXH VDPSOH VWD GDUG GHYLDWLR SRSXODWLR VWD GDUG GHYLDWLR WRWDO GDWD FRX W HIIHFWLYH
GDWD FRX W SURFHVV FDSDELOLW L GH[ HDFK %,1 XPEHU FRX W
0D LPXP L SXW YROWDJH
9ROWD H PHDVXUHPH W WHUPL DO 9 ' EHWZHH +,*+ /2: WHUPL DOV 9+] 9SN +RZHYHU LI PHDVXUL YROWD H L H[FHVV RI 9 WKH
PHDVXUHPH W WDU HW PXVW EH LVRODWHG IURP URX G
0D LPXP UDWHG YROWDJH WR JURX G 9ROWD H PHDVXUHPH W WHUPL DO 9 0HDVXUHPH W FDWH RU ,, 9 WLFLSDWHG WUD VLH W RYHUYROWD H 9 WR URX G
'LVSOD L FK 7)7 FRORU / ' UHVLVWLYH WRXFK SD HO
6WD GDUGV 6DIHW (1 (0 (1 (1
3RZHU VXSSO 'LPH VLR V 9 WR 9 +] 9 PP L : PP L + PP L ' H[FOXGL SURWUXVLR V
0DVV '0 '0 N R] '0 '0 N R]
FFHVVRULHV , VWUXFWLR PD XDO [ SRZHU FRUG [ DSSOLFDWLR GLVN ' 5 [
Voltage measurement accuracy speci cations
Temperature Measurement Accuracy Speci cation :KH XVL WKH 7(03(5 785( 6(1625
■ 2SWLR V 7HVW /HDGV 6H VR V
Speci cations
FFXUDF XDUD WHHG IRU HDU 3RVW DGMXVWPH W DFFXUDF XDUD WHHG IRU HDU
8VL ORZ W HUPDO WHVW OHDG , WH UDWLR WLPH 7L 3 & 3RZHU L H & FOHV RU PRUH
DEOH HUURU GGLWLR DO HUURU IRU PHDVXUL XVL D FDEOH RWKHU WKD WKH ORZ WKHUPDO WHVW OHDG
1RLVH HUURU GGLWLR DO HUURU GXH WR WKH L WH UDWLR WLPH 7L
Example addition: If using only the L9207-10 to perform measurement, add 10 μV to the accuracy. If combining the L4930 and L4932, add (3+10) μV.
3/ ≤ 7L < 10 PLC: ±0.0001% of the range ±0.5 μV, 0.2 PLC ≤ 7L < 1 PLC: ±0.0003% of the range ±1 μV, 0.02 PLC ≤ 7L < 0.2 PLC: ±0.001% of the range ±2 μV
PSE MFOHUI DN
ODMVEFT DBQT SFE BOE CMBDL FB
211( 7,21 /( 6(7 /
7(67 /( ' /
PSE MFOHUI N GU
217 7 3,1 6(7 /
60 // //,* 725 /,3 6(7 /
//,* 725 /,3 6(7 /
( 7(16,21 /( 6(7 / *5 (5 /,3 /
86 5 /,3 6(7 /
7(67 3,1 6(7 /
7(03(5 785( 6(1625 =
7 7 5 7
5 7 5 7 7
5 7
5 7 7
PSE MFOHUI N GU
8 UI DPOOFDU PO DPOOFDUPS
5 7
5 7
5 7
5 7 7
ODMVEFT DBQT SFE BOE CMBDL FB
NN
O
NN O
PSE MFOHUI N
GU
&RPEL DWLR &RPEL DWLR
SSP YROWDJH PHDVXUHPH W DFFXUDF
0RGHO 35( ,6,21 ' 92/70(7(5 '0
.PEFM /P 0SEFS PEF /PUF
'0
'0 %XLOW L *3 ,%
'0 %XLOW L 56
0HDVXUHPH W SUREHV DUH RW L FOXGHG 3XUFKDVH WKH SUREHV DSSURSULDWH IRU RXU
DSSOLFDWLR VHSDUDWHO
SSP YROWDJH PHDVXUHPH W DFFXUDF
0RGHO 35( ,6,21 ' 92/70(7(5 '0
.PEFM /P 0SEFS PEF /PUF
'0
'0 %XLOW L *3 ,%
'0 %XLOW L 56
0HDVXUHPH W SUREHV DUH RW L FOXGHG 3XUFKDVH WKH SUREHV DSSURSULDWH IRU RXU
DSSOLFDWLR VHSDUDWHO