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620 Series
Digital Strain-gage Indicators |
| The Series 600 of
Digital Strain-gage Indicators is equally compatible with lower output
bonded foil type transducers as with high output semiconductor transducers
(up to 100mV). Each instrument allows selection from one of four full-scale
voltage ranges to optimize sensitivity. The measuring technique
used is the unique voltage-to-frequency conversion, dual slope method
with a true, four-wire ratio measurement. This method assures accurate
and stable readings even in noisy environments that can occur with fluctuating
excitation power. Also, it allows for use of indicators with floating
or grounded transducers. Three alphanumeric
LEDs are supplied either for display of engineering unit tables (e.g.,
PSI, KG, LBS) or as "0" for active display of dead zeros. Digital scaling
is standard. Drift-free scaling is set to precise engineering units
and decimal location via the instrument's simple, front panel keyboard
entry. Dual engineering
units (e.g., LBS and KG) are standard. The primary and secondary engineering
unit displays are easily toggled via the front panel. For example, the
primary could be pounds (lbs) while the secondary, a mathematically
proportional kilograms (kg). Because of their math equivalency, all
options function correctly, regardless of display selection. System calibration
can be accomplished using a 3-point "live" load, such as actual
weight on a scale, or via electronic instrument calibration using a
DC voltage source. To reduce settling
indications on the display or option outputs, the display may be rounded
to count by 1, 2, 5, 10, or 100 counts via a simple program menu selection. Auto zero (tare)
may be accomplished by the auto zero menu command or while the process
is running. A simple, simultaneous push of the arrow down - (Ø)
and ENT keys rezeros the indicator. Three Base Models There are three
base models of strain-gage indicators from which you can select. The
models vary by their excitation power supply and the availability of
option slots. The Model 620
is for a user-supplied, external excitation source. It has two available
option slots. The Model 621
includes a built-in excitation supply capable of driving one or two
350 The Model 622
includes a higher output built-in excitation supply and, because it
comes in a larger double-width chassis, the ability to add up to four
options. This excitation supply provides 5, 10, 15, or 20VDC selection
with the capability to excite up to eight 350 Order Models 620G--8 for use with external supply and up to two options, 621G -8 for built-in supply and one option slot, 622g--8 for built-in supply and four options slots. NOTE: " " specifies power: 1 = 115VAC, 2 = 230VAC.
|
bridges. Supply
voltage is switch selectable for 5, 10, or 15VDC. One option slot is
available.
Strain-gage Range Table |
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| Range | Order Code | Accuracy(±)* | Resolution | |
| -15mV to +100mV | -8 | 0.01% | 1µV per count | |
| -30mV to +200mV | -8 | 0.01% | 1µV per count | |
| -75mV to +500mV | -8 | 0.01% | 1µV per count | |
| -1500mV to +1V | -8 | 0.01% | 1µV per count | |
| * Accuracy percentage is of reading, ±1digit. | ||||
Series 600 Options |
| Tailor the basic
instruments and your applications with options to extend your measurement
capabilities. A complete explanation, any usage restrictions, and option
ordering codes are included in the following descriptions. Any option
can be ordered now or added in the future so your Series 600 Indicator
will never be obsolete. Available options
slot summary: 610 Models: 2, 612 Models: 5, 620 Model: 2, 621 Model:
1, 622 Model: 4. Multiple inputs.
Monitor as many as 24 inputs. The first multiple input card provides
an additional five channels of thermocouple or voltage, or two channels
of RTD, or thermistor inputs. Additional cards add six more thermocouple
or voltage, or three more RTD or thermistor inputs. One card per Model
610 or a maximum of 4 cards per Model 612 instruments. (This feature
is not for use with current loop or strain-gage versions.) Order
Option -21 for 6 input of thermocouple or voltage, -21 for 3 inputs
of RTD or thermistor. Differential measurement. This card provides an additional input channel and the capability to display the difference (sT) between the two channels. The -22 option card
can be specified with thermocouple and voltage input models. The -23
option is specifically for use with RTD or thermistor configurations. This function can
be combined with other options: maximum, minimum, and average deltas
when used with math capability, scaled analog output of differentials
when used with analog output, and alarm points based on differential
limits (Cannot be used in same indicator with -20 and -21 options. Not
for use with current loop or strain-gage versions.) Order Option
-22 for DELTA and 2 thermocouple or voltage inputs, -23 for DELTA and
2 RTD or thermistor inputs. Scaling and offset.
Specifically designed for use with voltage and current loop versions
of the 610 and 612, this option provides wide range user scaling of
the display to process units. With this option
you can rescale and offset inputs for display in direct engineering
units to ±99999 counts. In addition, you can assign alphanumeric labels
or dead zeros to the displayed units. For example, 4-20mA
could be scaled to display "0.00-255.00 PSI", "LBS",
"KG", "GPM", etc. And it's easy. Unlike with other
instruments, you need not perform any computations or enter any formulas.
Simply enter upper and lower input and output values. The Series 600
does the rest, adjusting the optimum slope and offset for you automatically.
(This option is not for use with Models 620, 621, or 622 as digital
scaling is included as standard.) Order Option -1 Math expressions.
Provides display of maximum, minimum, rate of change, or the timed average
value of measurements. Front panel keys allow you to view the math value
or switch back to view the actual measured value. Order Option -04 Alarms. Each
option card provides two alarms with separate limits and relays. Up
to two cards can be specified. Any combination of high, low, or ± values
can be used to trigger the alarm from either actual or math processed
input. Trigger delay and a settable dead-band are included as standard.
Order Option -03 (Up to 2 per instrument.) DC power.
For automotive, marine, aviation, or plant DC power loops, the Series
600 can be configured for 12 or 24VDC power operation. (Cannot be used
in Models 621 or 622.) Order Option -10 for 9-16VDC, -11 for 18-32VDC
(One type per instrument.) Analog output. For output to recorders or other analog input instruments, you can choose from two fully isolated linearized and analog outputs. Both output types, 4-20mA or 0-10VDC, can be fully scaled. Output can be assigned to direct measurements or math values. Order Option: -06 for 4-20mA, -05 for 0-10VDC Scanning Option. The scanning option gives the capability to scan multiple inputs by working with the multi-input cards in your indicator. This new option requires no programming; thus, no special menu prompts are given with this option installed. The display readout shows the value of multi-input card channels at a default rate of 3.4 seconds a channel. The display rate can be made slower (6.8 sec) - refer to the configuration instructions to change the rate of display. It is recommended that the scanning option not be used with a communications option such as serial output, etc., since measurement data cannot be identified as discrete channels. Order Option: -31
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Digital Outputs |
| Three digital output
modes are available for output to digital equipment. Serial output.
RS232C or 20mA interface sends display information in serial ASCII format.
Includes user-selectable transmission rates from 300 to 9600 baud, line
feed, and carriage return. Order Option -07 IEEE-488 output.
For integrating IEEE-488 Bus based measurement or analytical systems.
Main indicator and other options can be programmed via the IEE-488 Bus.
Order Option -08 Series 600 accessories.
The Rack Adapter Plate permits mounting of the Series 600 instruments
in a standard 19" (48.2cm) instrument rack. Different versions
have cutouts for 1, 2, or 3 indicators. Order Accessory -RKM1 for 1 cutout for Models 610, 620, or 621; -RKM2 for 2 cutouts for Models 610, 620, or 621; -RKM3 for 3 cutouts for Models 610, 620, or 621; -RKD1 for 1 cutout for Models 612 or 622.
|
Model 600 Series General Specifications |
Repeatability
±1 digit
Stability with Ambient Temperature
Zero: 0.5µV/°C
Span: 0.005% rdg/°C
Reference Junction automatic built-in,
0.018°/° for 0°-50°C J, K, T, E, N, C,
G, D, CGI,FeCon, and CuCon thermocouples
For R, S, and B thermocouples: 0.03°/°
Noise Rejection
NMRR:
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60dB at 50Hz or 60Hz ±0.1Hz
CMRR: 
90%RH noncondensing
Display
8 digits, 14-segment alphanumeric red LEDs
0.54" (13.7mm) H.
Also one negative ("-") LED at left of array
Input Connections
Sensors: screw terminal blocks
Multi-input: quick connect
AC power: plug-in
DC power: screw terminal blocks
Alarms Option
2 alarm settings per alarm option -
up to 2 alarm options per instrument,
Form C relay output (1A at 120VAC) reset
auto, manual, remote, and override selectable
alarm delay and deadband
Multi-input Options -20 and -21 Accuracy
Thermocouple: ±10µV to ±70µV depending on
T/C type and measurement point
RTD:
Cu10: ±10m
600 Series Ordering Guide |
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| Base Model | Power Code | Range Codes | Options Code |
| 610
612 |
1=
90-132VAC 2=190-262VAC |
-1
(Thermocouple) -2 (Voltage) -4 (Current & Loop) -5 (RTD) -6 (Thermistor) |
See 600 Series Options List for individual details and codes. |
| 620
621 622 |
-8 (Strain-gage) |
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| Examples: | 610-1-1-03
612-2-5-21-21-06-04 621-18 622-1-8-16-03-03-07 |
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