Dwyer Instruments ASG User manual

HANDHELD-PORTABLEANALOG
SIGNAL GENERATOR
MODEL ASG
DESCRIPTION
The Model ASG is a handheld, battery-or plug-inpower
supply powered, pocket-size analog signal generator. It
generates a 0-10 VDC signal in increments
of 1V or a O-
20 mA signal in increments of 2 mA. The LED bar graph
visually indicates analog signal level.The
Model ASG can
also continuously ramp to user-defined minimum or maxi-
mumvalueswith user-defined ramp-timesettings.
FEATURES
Poweredby 9V battery or plug-in power supply
Pocketsize
Bargraph LED for signal display
0-20 mA (2 mA increments)
0-10 VDC (I VDCincrements)
Ramp function tominimumand maximumvalues
Variableramp function timing
Low battery indication
User-definedautoshutoff timesfor battery
conservation
Separatemilliampand voltageoutputjacks
APPLICATIONS
6' (1.83m) leads withalligator clips
- - Troubleshootingtransmiiters, transducers,and
Up to 30 hours continuous use ona single battery actuators
Perfectfor loop-poweredcircuits and externally , Calibratingtransducers,displays,and other
powered circuits analogsignal devices
1000Rmin
300R max
*0.5% FS or k0.1 mA
k0.5% FS or k0.05 VDC
32" to 122°F(0" to 50°C)
14 oz (0.4kg) with accessories
4.7"H x 2.40"W x 0.85"D
(11.9 x 6.1 x 2.2 cm)
0-20mA (2mA increments)
0-10VDC (1VDC increments)
Rampingtime intervals 2-20sec (2-secincrements)
Auto shutoff times
2-20min. (2-min.increments)
Accessories included 9V battery, 120VAC plug-in
! DlMENSlONS f WlRlNG
in
(cm)
Output
mA Source 0000
mA Two-Wire
Transm~tter
Output
4.7
(1 1.9)
1
January 2005

Adjustingthe ASG is accomplishedthrough buttons 1 through 4 onthefront and verifiedthrough the LEDsonthe
top of the
ASG.
Analoa Outputs
The ASG has three individualoutputs-mA source, two-wiretransmitter, andvoltage output. The voltage output oper-
ates over a
0-10 VDC range. The "mA SourceOutput"will source a 0-20 mA signal poweredby the batterysup-
pliedwith the
ASG. The output labeled"mA two wire xmitter" requiresan external power supplyand is intendedfor
looppoweredcircuits.
DisDlav
The LEDs onthe top of the ASG verify the progressof all adjustmentsand indicatestatus of variousfunctions of the
ASG. *+
The "Status LED" indicatesnormaloperation, low battery,and ramp mode. When this LED is inthe off state, it indi-
catesthat the
ASG is working normally. Ifthe "StatusLED" is lit continuouslyduring normaloperation, the battery is
low. The "StatusLED"will blinkwheneverthe
ASG is in a ramping mode.
The "mA Over Load LED"will light whenever the circuit exceeds
300R. Note:This "Over LoadLED"will light if the
leadsare not connectedto a device due to an open circuit.
The "Output LEDs" indicatethe analogsignal level, ramptimes durationand programming, and auto off times. The
"SignalLevelLEDs"are readas either mA or voltage with the appropriatescale. During ramping mode calibration,
the mA scale is usedto represent time inseconds. For instance,
2 represents 2 seconds and 20 represents 20 sec-
onds. Duringthe auto-off change mode the mA scale representstime inminutes. (SeeAuto-Off Functionon page
4)
Press and hold until
Pressand Release @ . 0 Press either
actlon has wurred highlightedbutton
Note: All time selection isset usingthe mA scale to representtime in secondsor minutes.
Programming
Buttons
WIRING
Voltage Output
I ASG I
mA Source
Hofl
Transmitter
mA SourceOutput
OW
mA Two-Wire XMTR Output
ASG
24 VOC
supply mASourc8
- + OW, 0000
-
-
Load
+
-
(black) f
mA Twc-WI~
Transmitter =F

ACTION
On
Off
SET-UP INSTRUCTK3N5
Press and Release @ Pressand hold until
0
Press either
achon hasoccurred highl~ghtedbutton
Power OnJOff
RH FIGURE la FIGURE 1 b
a*
Selectina the Output Level
0000
C FIGURE 2 - -- - - A- --A-
'The Rampina Function
The ASG will continuously ramp betweentwo user-definedendpointsfor a user-specifiedintervaltime between
each incrementalstep. The ASG ispreprogrammedto ramp between
4 mA (2VDC) and20 mA (10 VDC) in 10-
second increments; however,customincrementaltimes and end points canbetemporarily programmedintothe
ASG.
Ram~inaStart and Stor,
FIGURE3a FIGURE 3b FIGURE 3c
ACTION
Increase Output
Decrease Output
INSTRUCTION
Pressbutton#1 down until'Output
LEDs"rampup and back full scale
(Figure1a)
Pressbuttons2, 3,
8 4 simultaneously
(Figure 1b)
VERIFICATION
0 mANDC LEDwill be
continuously lit
All LEDswill turn off
INSTRUCTION
Pressbutton#4
(Figure2)
Press button #l
(Figure2)
VERIFICATION
"Output LED" will increase
to the next output level
"Output LED' willdecrease
to the nextoutput level
VERIFICATION
Appropriate "Output LED'
will light
'Status LED' and 'Output
LED' will blink alternately
"Status LED' will stop blinking
8
turnoff, 'Output LED' will light
continuously
ACTION
Set Starting Point
Start Ramping
Stop Ramping
INSTRUCTION
Pressbuttons#lor 4 to
desiredstartingoutput level
(Figure3a)
Pressandholdbuttons#2
8 3
(Figure3b)
Pressbuttons#2
8 3
(Figure3c)

SET-UP INSTRUCTIONS (CONTINUED)
Pressand holduntil
Pressand Release .
0 Presseither
acbon has occurred highlightedbutton
Settina the Ramp Signal Limits
FIGURE4a FIGURE 4b
FIGURE4c FIGURE 4d
' The IntervalTimes are basedon the mA scale. Each positionis
interpretedin seconds. For example,
10 mA represents 10 seconds.
The Auto-Off Function
VERIFICATION
"Output LED' blinksat the
10 mA position
"Output LED" blinks at the
correct time intervalposition
"Output LED' blinkstwice
insuccession
'Output LED" blinkstwice at
first end point position
'Output LED" blinks
3 times
insuccession
"Output LED" blinks
3 times in
2nd end point position
"OutputLED"stops blinking
and lightscontinuously
ACTION
Enter ProgrammingMode
Set Time Interval'
Enter 1st End Point Mode
Set 1st End Point
Enter 2nd End Point Mode
Set 2nd End Point
Exii Ramp PmgrammingM
INSTRUCTION
Press & hold buttons #I & 2
(Figure4a)
&ress buttons #I or 4
(Figure4b)
Press buttons
#1 & 2
(Figure4c)
Press buttons # 1 or 4
(Figure4b)
Pressbuttons
#3 & 4
(Figure4d)
Press buttons
#1 or 4
(Figure 4b)
Press buttons
#3 & 4
(Figure4d)
I Enter ProgrammingMode Press & holdbuttons #I & 3 'Output LEDmblinks4 times
I (Figure5a) in succession
ACTION
Press buttons #1 or 4
(Figure5b) "Output LED' blinks4 times at
newlyadjusted time position
INSTRUCTION
I Exit ProgrammingMode Press buttons #l & 3
"Output LED" stops blinking
I (Figure 5c) and lightscontinuously
VERIFICATION
FIGURE5a FIGURE5b FlGURE
5c
' Auto Off times are basedon the mA scale. Eachpositionis interpretedin
minutes. For example,
10 mA represents 10 minutes.Set Auto Off time to
zero to disable.The Auto Off time defaults to
6 minuteseach time the ASG
is turnedon.
ORDER l NG IPIFCNIMATIQPI\
..--
.
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1
MODEL DESCRIPTION
MODELASG mANDC Pocket-sizeSignal Generator with Accessories