_ ___-_l_-_-~- ..I_ ---.- __._..- - ._.. - -....
SPECIPICATIONS
SPECIFICATIONS
An a DE-I: Identical t.0 Model 168
As a mAs Heter:
HDDEL 169-23
Range:
Accuracy:
Drift:
r&t hit: mAs range not to exceed 1999 *a
Maximum current:
Tracking Rate:
0 to 1999 millimp-seconda (other ranges selectable with
external shunt resistor)
?lX of’:reading fl digit
1 digit in ten seconds
:W.s range) 3000 ma not to exceed .66 seconds duratia,
Greeter then 3000 ma per microsecond for rated sceuraey
2
0375
“ODE,. 168-23
OENEPAL INPORHATION
SECTION 1. GENERAL INFORMATlOi
The Hodel 168-23 OlAa meter is a Model 168.modified by the addition of
integratin,, capability on voltage and current ranges. The Model 168-23
is specifically designed to measure “As on x-ray machines but has a&icatio” wherever integrated current or voltage measuremen~a are required.
0375
3
‘INITLAL PREPARATION
SECTION 2.
Same es 168, however check zero and adjust if necessary.
INITIAL PREPARATION
0375
MODEL 168-23
1
.
OPERATING INSTRUCTION:
.~
SECTION 3. OPERATING INSTRUCTIONS
As a Dm:
A.9 a mAs Meter: Refer Lo Model 168 manual for power selection derails.
Connection Co X-Rey Machines:
designed for use with x-ray machines in the O-1999 mAs range. Ihe S.AS
meter muer be connected in series with the x-ray machine’s high voltage
secondary, between the secondary winding and ground. a~ show, in Pigwe
1. Most x-ray machines have labeled ma or ,X,B test points for this
purpose.
Place tie-NORM switch to NORM position. then refec to Hodel
168 mnual for DMH operation.
Place tia-NOPJ4 BViLCh to mAs. For the o-1999 mA8 range,
deprese (DC) and (A).
the unit Lo 0 “IAS nnd use the erase buccon vhenever a
reeec is desired.
The 168-23 tie meter is specifically
Depress the crane button co reset
r---------i
1
0375
FIGURE 1.
-I
Connection LO X-Ray High “olc.8~ Secondary
5
0PERATTNC INSTRUCTIONS
NODEL 168- 23
WARNING
Consult x-ray machine service manual far proper hook up, since
improper connections can result in lethal “oltegea present on the
168-23 and damage to the meter. NEVER c~nnece 168-23 f~ “high”
side of the secondary. This will result in destruction Of the
metet and a dangeraus shock hazard. Never much any part of the
measurement circuit with the hiph “oltaw on.
A,, over voltage pmtectim device should be securely fastened acr0.s~ the
ma or mAe tear pairks externally or internally to protect both machines
and the operator in the event of an open circuit to the mAs meter (i.e..
test lead falling off. blm fuse, etc.).
Suitable protection devfces
include power reeietors. spark gaps, etc. Specific i”forn!ntio” concerning
procecrion devices ahcsuld be obtained fram the manufacturer af the x-ray
machine in qut?aLion,
a Shunt Resietor
0 * 199.9 mAs 10 n
0 + 1999 mAa 10
0 * 19990 mAe .l ”
Thie technique provides greater safety, olultiple ranges. end f,reatei input overload protectian on rhe 168-23.
6,
0375
HODEL X8-23
,er Ueee: The 168-23 has 3 usable integrating ranges, as follows:
OPERATING~ ‘INSTRUCTIONS
Function
mAe
*
“B
The low mAs range has 1000 ohm series resistance, and should not be
wed for x-ray lnAa measucements.
transformed into an ti range by use of a shunt- resistor.
Setting (mAelNOI(N in mAs)
(DC) (A)
I::; (*)
NOTE
The volt-second range can be
Range
0 - 1999 *
0 - 1.999 mA*
0 - 1.999 “a
--L--
r--,--
IO-MEG.
TND,IT
ICE
HIGH
VOLTAGE
CCPnYnno”
-RAY
I
I
I
TUBE
0375
L IiPUT
CONNECTORS
FIGURE 2.
.I
I
I
Integratin,, “alta~e Node
7
MAINTENANCE
._.~ ._.~~
HODEL 168-23
-8ECTIiZIN 4~ilAINTEiViiNCli
Cellbrarian and R&air: Return instrument LO factory aa specified in
168 manual.
8
0375
Loading...