DH Instruments MOLSTIC DUAL LO FLOW User manual


2P[XQaPcX^]B^[dcX^]b
U^a?aTbbdaT
P]S5[^f

8]bcadRcX^]BWTTc
]_\cdYSTeQ\\_V\_g
?=# " '
\^[Q[^R<^d]cX]VBhbcT\
34B2A8?C8>=
]_\cdYSc`b_fYTUQ^U^WY^UUbUTc_\edY_^d_dXU`bQSdYSQ\YcceUc_V]_e^dY^WQ]_\R\_SS_^^USdY^WQWQcce``\i
bUWe\QdY^WdXU`bUccebUQ^TS_^^USdY^WdXUTUfYSUd_RUdUcdUT8YWXUcdaeQ\YdiS_]`_^U^dcQbUY^dUWbQdUTY^d_
QS_^fU^YU^dS_]`QSdQccU]R\i
DXUWQcce``\iYcQddQSXUTecY^WQaeYS[S_^^USd_b1 %]YSb_^VY\dUb`b_dUSdcdXUT_g^cdbUQ]S_]`_^U^dc
DXU^ Q^ QTZecdQR\U %  [@Q' `cYW d_ '  [@Q!  `cYW bUWe\Qd_b cUdc ]_\R\_S e`cdbUQ] `bUccebU Q^T
`b_dUSdc dXU ]_\R_h dbQ^cTeSUbc QWQY^cd QSSYTU^dQ\ _fUb`bUccebU  1 RU\\_gc cXed_VV fQ\fU Zecd RUV_bU dXU
]_\R\_SQ\\_gcdXUWQcce``\i e`cdbUQ] _VdXU]_\R\_Sd_RUcXed_VV1S_^^USdY_^Q^T`QTcQbU`b_fYTUT
T_g^cdbUQ] _V dXU ]_\R\_S V_b ]_e^dY^W dXU ]Qcc V\_g S_^db_\\Ub =63 Q^_dXUb TUfYSU e^TUb dUcd _b dXU
_`dY_^Q\^UUT\UfQ\fU[YdV_b]Q^eQ\V\_gS_^db_\
]_\cdYS TeQ\ \_ V\_g @> $ !#!( Yc TUcYW^UT d_ _`dY]YjU dXU ecU _V ]_\R\_S bQ^WUc _V ! c\] Q^T RU\_g
9decUc Q c`USYQ\ XYWX cdQRY\Ydi \_g V\_g bUWe\Qd_b Q^T Q VY\\Ub b_T d_ bUTeSU dXU TUQT f_\e]U RUdgUU^ dXU
]_\R\_SQ^TdXUdUcd
BC0ACD?U^a8]ST_T]ST]c>_TaPcX^]^U4PRW2WP]]T[
CdQbdY^We`Q]_\cdYSbUaeYbUcS_^^USdY^WQWQc`bUccebUce``\iQTZecdY^WdXU`bUccebUbUWe\Qd_bYV^USUccQbi
Q^TS_^^USdY^WdXUTUfYSU_bcicdU]d_RUdUcdUTT_g^cdbUQ]_VdXU]_\R\_S
å 2^]]TRc cWT VPb bd__[h)  3_^^USd Q WQc ce``\i d_ dXU aeYS[S_^^USd_b cdU]!$ Y^CG7

>E@B?


CCA3$4$ 9TUQ\\iY^\Udce``\i`bUccebUgY\\RUbUWe\QdUTd_Q``b_hY]QdU\i%% [@Q( `cYW9^^_
SQcUcX_e\TdXUce``\iUhSUUT&) [@Q! `cYW>_dU*1TbdaTcWT\^[bcXRXb^[PcX^]eP[eTb PaT
R[^bTSXQ^T\UT_g^RUV_bUS_^^USdY^WdXUaeYS[S_^^USd_bcdU]d_dXUaeYS[S_^^USd_b4_^_dS_^^USd
_bTYcS_^^USddXUaeYS[S_^^USd_bgYdXQ`bUccebUWbUQdUbdXQ^!%=@Q" `cY_^UYdXUbcYTU
8]bcP[[ cWT \^[Q[^R)  9^cdQ\\ dXU TUcYbUT ]_\R\_Sc _^d_ dXU ]_\cdYS cUU ]_\R\_S 9>CD1<<1D9?>
1>4CG1@@9>7
ê5X[[Ta a^S)  DXUbU QbU " VY\\Ub b_Tc TU\YfUbUT Y^ dXU QSSUcc_bYUc  C\Y` dXU VY\\Ub b_T @> !"")  Y^d_
dXU^Y``\U#
0SYdbc cWT _aTbbdaT aTVd[Pc^a)  DXU ]_\cdYS Yc TU\YfUbUT gYdX dXU `bUccebU bUWe\Qd_b cUd d_ "'  [@Q
QRc_\edU$ `cYQQR_ed!&%[@QWQeWU"&`cYWdXU]_cdS_]]_^]_\R\_Se`cdbUQ]`bUccebUcUddY^W
4U`U^TY^W _^ dXU ]_R\_Sµc `bUccebU TU`U^TU^d SQ\YRbQdY_^ di`U Q TYVVUbU^d ]_\R\_S e`cdbUQ] `bUccebU
cUddY^W ]Qi RU ^UUTUT cUU dXU ]_\R\_S SQ\YRbQdY_^ bU`_bd  D_ QTZecd dXU bUWe\Qd_b SQ` dXU `bUccebU
T_g^cdbUQ]_VdXU]_\R\_S?`U^dXU]_\R\_SYc_\QdY_^fQ\fU!BUQTdXU]_\R\_Se`cdbUQ]`bUccebU
ecY^WdXUK@DMVe^SdY_^_VdXU]_\R_hcUUdXU]_\R_h?`UbQdY_^Q^T=QY^dU^Q^SU=Q^eQ\1TZecddXU
]_\R\_Se`cdbUQ]`bUccebUd_dXUTUcYbUTfQ\eURiY^cUbdY^WQcSbUgTbYfUbY^d_dXUbUWe\Qd_bXUQT$Q^T
b_dQdY^WdXUQTZecd]U^dcSbUge^dY\dXUTUcYbUT`bUccebUYccUd>_dU*CWTaTVd[Pc^aXb=>CbT[UeT]cX]V
9VTUcYbUT\_S[dXUbUWe\Qd_bcUddY^WRi`eddY^WQgYbUdXb_eWXdXU\QdUbQ\X_\UcY^dXUXUQT
8]bcP[[cWT<52cTbc)9^cdQ\\dXU=63cd_RUecUT_bdUcdUT_^d_dXU]_\cdYSDXU=63`QTc"cX_e\T
QccebUdXQddXU=63YcQddXUS_bbUSdXUYWXdV_bQ\YW^]U^dYVdXU=63VYddY^WYcF3B6_b=63VYddY^Wc_dXUb
dXQ^F3BecUdXUQ``b_`bYQdUQTQ`d_b^_dce``\YUT9Vi_eXQfUdXU^UUT\UfQ\fU_`dY_^@>$ !#!)
V_b]Q^eQ\V\_gS_^db_\Y^cdQ\\YdXUbU


]_\cdYSTeQ\\_V\_g]_\R\_S=_e^dY^WCicdU]
]_\R\_S]_\R_hQ^T]_\cdYSQbUdbQTU]Qb[c_V 378]bcad\T]cb8]R 
>e`b_YcQbUWYcdUbUTdbQTU]Qb[_V>E@B?3_>E@B?YcQCgQWU\_[S_]`Q^i
CG7Q^TF3BQbUbUWYcdUbUTdbQTU]Qb[c_VDXUCgQWU\_[3_]`Q^YUc
4_Se]U^d%& !'Z ! "'
378]bcad\T]cb8]R
$'&%5Qcd2UQedYVe\<Q^U
@X_U^Yh1J(% $$%#!(
EC1


2P[XQaPcX^]B^[dcX^]b
U^a?aTbbdaT
P]S5[^f
DU\& "$#!)!

6Qh& "$#!)%%)

TXY0TXY^cdbe]U^dcS_]

gggTXY^cdbe]U^dcS_]


\^[Q[^R8=BC0;;0C8>=0=3BF0??8=6
å ]_\R\_ScSQ^RUbU]_fUTQ^TY^cdQ\\UT_^UQdQdY]UY^TU`U^TU^d\i_^UVb_]dXU_dXUb
<__cU^ dXU Y^dUbS_^^USdY^W ^Y``\U S\Q]` # c_ dXQd dXU ^Y``\U SQ^ ]_fU VbUU\i Y^ Ydc beRRUb Wb_]]Ud
=_fUdXU^Y``\UQgQiVb_]dXU]_\R\_SSbQT\Ud_Q\\_g]QhY]e]b__]V_b]_\R\_SY^cUbdY_^
ê@\QSUdXU]_\R\_SY^dXU]_\cdYS]_\R\_SSbQT\UcRUcebUV\_g_bYU^dQdY_^YcS_bbUSd3XUS[dXQd^_TURbYc
Yce^TUb]_\R\_S
3_^^USdQ^TdYWXdU^dXUe`cdbUQ]fQ\fUcYTU]_\R\_SF3BS_^^USdY_^ecY^WQc_Vd?bY^WQ^TV_\\_gY^W
dXU `b_SUTebU `b_fYTUT Y^ 4_Se]U^d %& )R BUS_]]U^TQdY_^c V_b ]_\R\_S 9^cdQ\\QdY_^ ce``\YUT gYdX
dXU]_\R\_S
@e\\ dXU Y^dUbS_^^USdY^W ^Y``\U d_gQbTc dXU ]_\R\_S T_g^cdbUQ] S_^^USdY_^  3_^^USd Q^T dYWXdU^ dXU
T_g^cdbUQ] ]_\R\_S F3B S_^^USdY_^ ecY^W Q c_Vd ?bY^W Q^T V_\\_gY^W dXU `b_SUTebU `b_fYTUT Y^
4_Se]U^d%& )RBUS_]]U^TQdY_^cV_b]_\R\_S9^cdQ\\QdY_^ce``\YUTgYdXdXU]_\R\_S
ñDYWXdU^dXUY^dUbS_^^USdY^W^Y``\US\Q]`#e^dY\dXU^Y``\UYccUSebU%>]]Qh
ò3_^^USd]_\R\_Sd_]_\R_hQ^T\UQ[SXUS[dXUcicdU]
ô D_ bU]_fU Q ]_\R\_S Vb_] dXU ]_\cdYS bUfUbcU dXU `b_SUTebU  2bUQ[ dXU T_g^cdbUQ] ]_\R\_S F3B
S_^^USd_b Q^T `e\\ dXU Y^dUbS_^^USdY^W ^Y``\U QgQi Vb_] dXU ]_\R\_S  2bUQ[ dXU e`cdbUQ] ]_\R\_S
F3BS_^^USd_bBU]_fUdXU]_\R\_S

<08=C4=0=240=3A42><<4=30C8>=B
•4YcS_^^USd`bUccebUce``\iVb_]]_\cdYSgXU^^_dY^ecU
•5X[cTa)  DXU ]_\cdYS VY\dUb Yc Q cUQ\UT % ]YSb_^ cY^dUbUT VY\dUb >E@B? CC$6GCF3B %  9dSQ^ RU
S\UQ^UTRi RQS[V\ecXY^W  D_RQS[V\ecXYd]ecdRUbU]_fUTVb_]dXU ]_\cdYS GXU^bU]_fY^WS\UQ^Y^W
Q^T Y^cdQ\\Y^W dXU VY\dUb dXU ]UdQ\\YS F3B WQc[Udc >E@B? CC$F3B"7B ]ecd RU bU`\QSUT Q^T Q\\
]Q^eVQSdebUbcµbUS_]]U^TQdY_^cV_\\_gUT
•7P]S[X]V) ]_\cdYS cX_e\T^_dRU`YS[UTe`_bSQbbYUTRiYdcS_]`_^U^dc1\gQicXQ^T\UdXU]_\cdYSRi
YdcRQcU
•5X[[Taa^S)DXUVY\\Ubb_TecUTd_bUTeSUdXUTUQTf_\e]URUdgUU^dXU]_\R\_SQ^TdXUdUcdYcTU\YfUbUTY^
dXU]_\cdYSQSSUcc_bi[Yd9dcX_e\TRUc\Y``UTY^d_dXU^Y``\U#9d9c^_dXU\TY^dXU^Y``\UDQ[USQbU^_d
d_\_cUYdgXU^]Q[Y^WdXUS_bbUSdY_^c_b]_fY^WdXU]_\cdYS