General DM8252 User manual

DM8252/8252RS
USER’S MANUAL
HIGH RESOLUTION
DIGITAL MANOMETER
DM8252 DM8252RS
INCLUDES 4RUBBER
STOPPERS FOR DUCT
SMOKE DETECTORS
DM8252_8252RS_Manual_fin081109:Layout 1 9/23
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

INTRODUCTION
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DM8252_8252RS_Manual_fin081109:Layout 1 9/23

CONVERSION & RESOLUTION
1mbar=
1mbar=
Resolution
Inch of H2O
mbar
psi
bar
mm of H2O
0.01
0.004
0.1
0.001
1
0.401
0.0145
1
0.001
10.2
Meter has 5selectable units of
measure: InH2O, psi, mbar, bar,
mmH2O.
Please check tubingis not leaking
or damaged beforeusing.
MANOMETER QUICK START
Unscrew battery compartmenton
rear of instrumentand fit PP3(or
Equivalent)battery replace cover
and secure withscrew.
Press to switchthe instrument on.
Press to selectunit of pressure
measurement required. To zero by
pressing and holdfor three
seconds , theinstrument now reads
gauge pressure.
Press for differential pressure
measurement.
I
UNIT
HOLD
DIF
DIF
3
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

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REL
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UNIT
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DM8252_8252RS_Manual_fin081109:Layout 1 9/23

4
3
10
12
1
5
9
8
7
6
11
15
14
2
13
HOLD REL DIF
DATALOGGER
REC AVG
MAX MIN BAT
CONTROLS AND INDICATORS
1.
2. "-" Minus pressure display.
3. MAX MIN pressure recorded.
4. REC starts recording modeand
displays max./min. pressure
recorded.
5. AVG Average records
6.
7.
8.
9. Pressure unitindication.
10.
11. DIF Differential pressure mode.
12. "+" Positive pressure connection.
13. "-" Negative pressure connection.
Primary Data Screendisplays
pressure value.
(N/A).
DC powerin Jack.
RS232 output port.
H/M/S 88:88:88 displays timefor
Hour / Minute/ Second.
BAT Battery low indicator.
inH2O psi mbar bar mmH2O
14. HOLD Freezes pressure reading.
15. REL (N/A)
Establish a relative zero for the
primary screen information.
5
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

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I
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MODE OPTIONS
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6
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

HOLD DIF
REC
UNIT
l

/
/
/
DISABLE SLEEP MODE
ZERO SETTING
SELECT UNIT / SKIP CAL.
HOLD
HOLD
Hold 2 sec.
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Fig. B
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DM8252_8252RS_Manual_fin081109:Layout 1 9/23

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8
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

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9
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

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MAINTENANCE
10
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DM8252_8252RS_Manual_fin081109:Layout 1 9/23

Fig. I
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bdWee[`Y]Wk "SA"S`V "CA"
SbbWSde[`$eWUa`VeS`VfZW`
bdWee[`Y , "End"S`V "CA"
SbbWSde[`S`afZWd $eWUa`VefZW
_WfWdfgd`eTSU]fafZW`ad_S^ _aVW
EWW8[Y >
REC
psi
Fig. K
psi
Fig. L
;XkagUS`feShWTkbdWee[`Y]Wk
[ W `a"SA" SbbWSdeb^WSeWUZWU],
SfZWUS^[TdSf[a`bdWeegdWeagdUW
[eTWfiWW`# 'S`V# )adT[Xkag
W`fWdWVfZWUaddWUfbae[f[hWbdWeegdW
ad`WYSf[hWbdWeegdW
UNIT
;XkagiS`ffae][bbae[f[hW
US^[TdSf[a`iZW`[`fZWUS^[TdSf[a`
_aVWbdWeefae][bfa`WYSf[hW
US^[TdSf[a`ba[`f
UNIT
UNIT
12
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

HOLD
MANUAL ZERO SETTING
IZW`kageWffZWV[eb^SkfalWda`a
bdWeegdWSbb^[WVfafZWUa``WUfadbdWee
Tgffa`Xad$eWUa`Ve`aifZW
_WfWdV[eb^Ske"- 0 .000" Xda_d[YZffa^WXf
EWW8[Y ?fZW`fZW>56V[eb^SkeZaie
S`ad_S^_aVW
Fig. M
inH2O psi mbar b ar mmH2O
be[
dS`YW
5S^[TdSf[a`
ba[`f
DWa__W`V


"p$# (# 'p# )
TROUBLESHOOTING
•Power on but no display.5ZWU]
fZWTSffWdkUa``WUf[a`e DWb^SUW
i[fZS`WiTSffWdkadSffSUZabf[a`S^
35SVSbfad
BAT indication. DWb^SUWi[fZS
`WiTSffWdkiZW`>56V[eb^Ske
BAT SffZW_[VV^W Taffa_
•
No Display. ?S]WegdWTSffWdk[e
`afVWSV ;XfZWV[eb^SkV[eSbbWSd
UZWU][Xe^WWb_aVW[eSUf[hW DWXWd
fafZWV[eST^We^WWb_aVWXg`Uf[a`
XadS^a`Yf[_WgeWbSYW' Ad
UZWU]fZSffZWfgT[`Y[eUa``WUfWV
fafZW_WfWdf[YZf^k
•
Calibration point reference
13
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

•Err.1. 8adfZWbdWeegdWhS^gW
WjUWWV[`YfZW_Sj[_g_ dS`YW
" Err.1" SbbWSdea`fZWV[eb^Sk
EWW8[Y A 6a`afWjUWWVdSfWV
ahWdbdWeegdWdS`YWaX_S`a_WfWd
EW`eadi[^^TWVS_SYWV
Fig.O
•Err.2.8adfZW_WSegdW_W`f
bdWeegdW^WeefZS`_[`[_g_
dS`YW"Err. 2" i[^^SbbWSdEWW
8[Y B
Fig. P
•Err.3 8adSV[XXWdW`f[S^bdWeegdW
hS^gW^SdYWdfZS`_Sj[_g_V[eb^Sk
Err.3" SbbWSdea`fZWV[eb^SkEWW
8[Y C
Err.4.IZW`kageWf lWda_S]W
egdWfZSfkagZShWV[eUa``WUfWVfZW
fgT[`Y ;XkageWWS`Err.4"SbbWSd
a`fZWV[eb^Sk[f_WS`efZW
_S`a_WfWd[eVS_SYWVEWW8[Y D 
•
Fig. Q
14
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

Err.4 I[^^TWS^eaSbbWSd[XfZW
fgT[`Y[eUa``WUfWVVgd[`YlWdaeWf
Fig.R
•IZW`kageWWfZW
WddadeiZ[^WabWdSf[`YDE$%$
eaXfiSdW[f_WS`efZSffZWbdWeegdW
eagdUW[e^Weead ahWdfZS`fZWdS`YW
aXfZW[`efdg_W`f
FZWBAT [Ua`SbbWSdea`fZWd[YZf
aXfZWeUdWW`
FZW_WfWdi[^^`afbaiWda`
GeWaXfZWTSU]^[YZfUSgeWefZW
BAT[Ua`faSbbWSd
REPLACING THE BATTERY
7hW`[XfZWTSffWdkiSedWUW`f^k
dWb^SUWVUZWU][feha^fSYW^WhW^[Xkag
YWf`adWeba`eWXda_kagd[`efdg_W`f
To replace the battery:
# DW_ahWfZWfgT[`YXda_fZW
[`efdg_W`f
$ >SkfZW[`efdg_W`fXSUWVai`a`S
U^WS`X^SfegdXSUW
% DW_ahWTSffWdkUahWd
E1OL or E2UL.
P.S.
Replace your “9V” battery when:
15
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

15
DW_ahWTSffWdkXda_[`efdg_W`fefZSf
kagVa`afb^S`fageWXadS_a`fZad
_adW 6a`af^WShWfZWTSffWdk[`
[`efdg_W`f
OPERATING CONDITIONS
5a_bW`eSfWVfW_bWdSfgdWdS`YW,
%$fa#$$8"fa'"5
AbWdSf[`YfW_bWdSfgdWdS`YW,
EfadSYWfW_bWdSfgdWdS`YW,
&fa#&"8$"fa("5
AbWdSf[`Y:g_[V[fk,?Sj *"D:
BaiWd,A`WÃ+HÄTSffWdk
7jUWWV[`Y?Sj[_g_bdWeegdWi[^^
USgeWbWd_S`W`fVS_SYWfaeW`ead
FZW_WfWd
4SffWdkÃ+HÄ
AbWdSf[a`_S`gS^
DgTTWdTaaf
5a``WUf[a`ZaeW," $&(__;6
j" %'+__A6j#+ )'""__
^W`YfZj$bUe
MATERIALS SUPPLIED
OPTIONAL ACCESSORIES
DE$%$eaXfiSdW56i[fZ6egT
Ua``WUfad
653VSbfad
This package contains:
%$fa#$$8"fa'"5
16
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

SPECIFICATIONS
Pressure
Range
0 ~ 138 mbar
= 0 ~ 55.4 inH2O
= 0 ~ 1410 mmH2O
= 0 ~ 0.138 bar
= 0 ~ 2 psi
Resolution
Accuracy
Dimensions
Unit Weight
Response
time
Format
See Page 2 data sheet
0.3% of full scale at 25°C
7.2" x 2.8" x 1.2"
182 x 72 x 30mm
Approx. 7.8oz (220g)
with battery)
0.5 seconds
Baud Rate: 2400 bit/sec
Data Bit: 8, Stop Bit: 1
P XXXXX, P - XXXXX (unit)
RS232 OUTPUT
FZW_WfWdUS`^[`]i[fZSbWdea`S^
Ua_bgfWdfaUSbfgdWa`^[`WVSfS ;fUS`
V[eb^SkbdWeegdWdWUadVei[fZdWS^
f[_Wagfbgf KagUS`dWfd[WhWX[^We
S`VeShWfZWVSfSXadabWdSf[`YVSfS
S`S^ke[edWUadVefSf[ef[Ue_g^f[X[^We
V[eb^Ska`fZWeUdWW` ;fZSehWdeSf[^W
Xg`Uf[a`eXadkagdUZa[UW
# B^gYfZWabf[a`S^SUUWeeadkDE$%$
UST^W[`fafZW65\SU]badfSffZW
d[YZfe[VWaXfZW_WfWd
$ ;`eWdffZW6egT+BfkbWUa``WUfad
[`fafZWUa_bgfWde5a_ #ad$badfad
Connection procedures:
17
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

% EfSdffaeWfgbDE$%$eaXfiSdWTk
[`eWdf[`YfZW56DA?
& IZW`[`efS^^[`YfZWDE$%$eaXfiSdW
b^WSeWXa^^aifZWabWdSf[a`_S`gS^
bdaUWVgdW [`fZW eaXfiSdWbSU]SYW
WARRANTY
FZ[e_WfWd[eiSddS`fWVfaTWXdWW
Xda_VWXWUfe[`_SfWd[S^S`V
iad]_S`eZ[bXadSbWd[aVaXa`WkWSd
Xda_fZWVSfWaXbgdUZSeW FZ[e
iSddS`fkUahWde`ad_S^abWdSf[a`
S`VVaWe`af UahWdTSffWdk_[egeW
STgeWS^fWdSf[a`fS_bWd[`Y`WY^WUf
[_bdabWd_S[`fW`S`UWadVS_SYW
dWeg^f[`YXda_^WS][`YTSffWd[We 
BdaaXaXbgdUZSeW[edWcg[dWVXad
iSddS`fkdWbS[de ISddS`fk[eha[V[X
fZW_WfWdZSeTWW`abW`WV
18
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

RETURN AUTHORIZATION
3gfZad[lSf[a`_gefTWaTfS[`WVXda_
fZWegbb^[WdTWXadWdWfgd`[`Y[fW_eXad
S`kdWSea`
IZW`dWcgWef[`YSDWfgd`3gfZad[lSf[a`
D3b^WSeW[`U^gVWV S f S d WYSdV[`Y
fZWVWXWUf[hWdWSea`
FZW_WfWd[efaTWdWfgd`WVS^a`Yi[fZ
YaaVbSU][`YfabdWhW`fS`kVS_SYW
[`eZ[b_W`fS`V[`egdWVSYS[`ef
baee[T^WVS_SYWad^aee 
19
DM8252_8252RS_Manual_fin081109:Layout 1 9/23

DM8252/DM8252RS User’s Manual
Specifications subject to change without notice
©2009 GENERAL TOOLS & INSTRUMENTS™
NOTICE - WE ARE NOT RESPONSIBLE
FOR TYPOGRAPHICAL ERRORS.
MAN#DM8252/DM8252RS 08/09
DM8252_8252RS_Manual_fin081109:Layout 1 9/23
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
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