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Model
500T - High Quality, Small |
Select
this text to download Literature for the 500 Series in PDF format. The Model 500T is designed for a variety of temperature measuring applications. Excellent accuracy and small size combine to make it the ideal choice for most industrial temperature indications. The 500T features a unique 0.1° or 1° automatic resolution. For temperature measurements below 1000°F, the instrument displays to a 0.1° resolution. With a measurement more than 1000°F, the instrument automatically switches to a 1° resolution. Thermocouple types R, S, and B only display in 1° increments. For any applications where a 1° resolution is desired for everything, the unit can be set to display only 1° increments throughout its measuring range. For ease of installation, each instrument is supplied in a standard 1/8" DIN 1.9" x 3.8" (4.8cm x 9.6cm) plastic case and has rear-accessible universal screw terminals. Large LEDs make temperature readings easy to read. Power is derived from 115 or 230VAC. Power is selectable via an internal slide switch. Select among nine
temperature sensors of thermocouple types, J, K, T, E, R, S, and B or
100 Alarm Setpoint Option. The alarm option provides a single or dual limit setpoint that can be set to any point, + or -, within the 500T's measuring range. The user digitally selects the setpoint with two buttons located on the front panel. Selection of Hi or Lo (single) alarm or Hi and Lo (dual) alarms is set via a jump-jack located in the option card. Once the setpoint is set, it may be reviewed for its actual value by pressing the View button. A front panel LED illuminates red (single alarm) or red/yellow (dual alarm) when the alarm trips. The Alarm Setpoint
option card also includes one Form C, 0.5A relay (single alarm) or two
Form C, 0.5A relays (dual alarm) for hook-up to external lamps, buzzers,
or on/off control elements. Relay terminals are accessible at the rear
of the instrument and provide hook-up for Normally Open or Normally
Closed operation. Multiple Inputs Option. The cost of measuring multiple temperature sensors can be cut using the 500T's ability to switch between up to six sensor inputs with its multi-input option. All input types contained in the 500T (thermocouple or RTD) can be switched, but they must all be of the same type (e.g., type K thermocouple). A miniature rotary
switch, accessible at the front lens, allows convenient switching between
inputs. Sensor hook-up is a snap-on/off terminal block located at the
rear of the instrument. Model 500T Accessories. The Rack Adapter Plate permits easy mounting of Model 500T Indicators in standard 19" (48.3cm) instrument racks. Four versions are available for mounting 1, 2, 3, or 4 indicators. Order Accessories -RKS1 for 1 cutout; -RKS2 for 2 cutouts; -RKS3 for 3 cutouts; -RKS4 for 4 cutouts.
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Model 500T General Specifications |
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Repeatability
±1 count
Stability with Temperature
Zero: 1µV/°C
Span: 0.01%
Thermocouple Reference Junction
Internal, automatic, 0.03%°C/°C, 5° to 45°C
Break Detection
Upscale, =50nA;
Stability with Time
1°/year
Noise Rejection
NMRR: 60dB @ 5./60Hz (±0.1Hz)
CMRR: 120dB @ 50/60Hz (±0.1Hz with
250
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; 3-wire,
Platinum RTDs, either .00385 or .00392 alpha. Each of these nine are
selected via a miniature rotary switch located directly behind the snap-off
front lens. No calibration is required to switch between thermocouple
types. Another miniature DIP switch, also behind the lens, selects between
F or C display. 
80%RH non-condensing
Multi-input Option Accuracy
Add ±0.5°C/±1°F to
instrument accuracy specification
Alarm Relay Contact Rating
0.5A @ 120VAC (noninductive load) Form C
Case Construction
One-piece, black plastic
Installation
Secured to panel by U-channel
bracket supplied with indicator
Size (H x W x D)
Case: 1.57" x 3.54" x 5.35" (1/8" DIN)
(4cm x 9cm x 13.6cm)
Bezel: 1.89" x 3.78" (4.8cm x 9.6cm)
Panel cutout: 1.77" x 3.62" (4.5cm x 9.2cm)
Weight
1 lb. (454 g)
Power
115/230VAC (±10%), 50-60Hz, 400Hz
Warranty
1 year
Thermocouple Range Table |
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| 1° Resolution | 0.1° Resolution | ||||
| Sensor Type | Range/Display | Accuracy (±)* | Range/Display | Accuracy (±)* | |
| Iron-Constantan | J | -337°
to +1403°F -205° to +762°C |
1°,
±0.03% 1°, ±0.03% |
-99.9°
to +999.9°F -99.9° to +761.8°C |
0.9°
0.5° |
| Chromel®**-Alumel®** | K | -331°
to +2510°F -202° to +1377°C |
1°,
±0.03% 1°, ±0.03% |
-99.9°
to +999.9°F -99.9° to +999.9°C |
0.9°
0.5° |
| Copper-Constantan | T | -346°
to +755°F -210° to +401°C |
1°,
±0.03% 1°, ±0.03% |
-99.9°
to +754.6° F -99.9° to +401.4°C |
0.9°
0.5° |
| Chromel®**-Constantan | T | -338°
to +1835°F -205° to +1002°C |
1°,
±0.03% 1°, ±0.03% |
-99.9°
to +999.9°F -99.9° to +999.9°C |
0.9°
0.5° |
| Platinum-Platinum
13%, Rhodium |
R | +32°
to +3216°F 0° to +1769°C |
1°,
±0.05% 1°, ±0.05% |
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| Platinum-Platinum
10%, Rhodium |
S | +32°
to +3218°F 0° to +1770°C |
1°,
±0.05% 1°, ±0.05% |
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| Platinum
30%, Rhodium-Rhodium 6%,Rhodium |
B | +601°
to +3325°F =316° to +1829°C |
1°,
±0.05% 1°, ±0.05% |
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* Accuracy percentage
of reading, ±1 digit. |
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Model 500D - Economical, User-Scalable, DC Input Indicator |
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Select this text to download the Model 500D Operator's Manual in PDF format. Featuring total user flexibility for input and display, the Doric Model 500D may be the last DC input indicator you'll ever have to specify. The scaling flexibility with 4-digit resolution, high accuracy, small size, and low cost makes the Model 500D the best value DC input indicator. The 500D's flexibility is unique. You can select between milliamp or voltage input with a switch easily accessible behind the snap-off front lens. Full scales are 0-20mA or 0-10V. These or any subset (e.g., 4-20mA, 1-5V, 200mV-2.5V, etc.) can be scaled. Scaling and calibrating the 500D to display engineering units from the DC input has never been easier. Two simple push buttons conveniently located behind the snap-off lens are used to set zero (Lo), full scale (Hi) and a decimal point. The 500D can be scaled within its wide -999 to 9999 display count. The microprocessor-based design of the 500D provides superior measurement stability, 1-digit repeatability, and 0.02% accuracy. For ease of installation, each instrument is supplied in a standard 1/8" DIN 1.9" X 3.8" (48mm X 96mm) plastic case and has rear-accessible universal screw terminals. Large LEDs make process readings easy to read, even from a distance. Power is derived from 115 or 230VAC and is selectable via an internal slide switch. Whether your application is for straight DC measurement or process measurements from DC transducers, transmitters, signal conditioners, or other instrumentation, the 500D is the answer. Model 500D Options. The Model 500D accommodates either an alarm setpoint or multiple input option. Additionally, a DC excitation supply can be specified. Any of these options can be included at the time of initial order or easily installed later in the field. Alarm Setpoint. The alarm option provides a single or dual limit setpoint that can be set to any point, + or -, within the 500D's measuring range. The user digitally selects the setpoint with two buttons located on the front panel. Selection of Hi or Lo (single) alarm or Hi and Lo (dual) alarms is set via a jump-jack located in the option card. Once the setpoint is set, it may be reviewed for its actual value by pressing the View button. A front panel LED illuminates red (single alarm) or red/yellow (dual alarm) when the alarm trips. The Alarm Setpoint
option card also includes one Form C, 0.5A relay (single alarm) or two
Form C, 0.5A relays (dual alarm) for hook-up to external lamps, buzzers,
or on/off control elements. Relay terminals are accessible at the rear
of the instrument and provide hook-up for Normally Open or Normally
Closed operation. Multiple Inputs. The cost of measuring multiple, like-scaled sensors can be cut using the 500D's ability to switch between up to six inputs with its multi-input option. Both input types (mA or Volt) can be switched but cannot be mixed in a single unit. For example, all inputs 1-5VDC to display 0-2750. A miniature rotary
switch, accessible at the front lens, allows convenient switching between
inputs. Sensor hook-up is to snap-on/off terminal block located at the
rear of the instrument. DC Excitation Supply. To directly power transmitters and transducers, a 500D or 500D with Alarm Setpoint can be ordered with a built-in DC supply. This option eliminates the cost and extra installation of more expensive external supplies. This supply provides 30mA at 24VDC. In transducer applications which require a lower voltage, instructions are provided to accomplish this with a resistor/jumper change on the option board. Further, its design is electrically floating, allowing it to be grounded anywhere. The hook-up is made
at the rear screw terminal block making both 4-wire and 2-wire configurations
easy to wire. Series 500 Accessories. The Rack Adapter Plate permits easy mounting of 500 Series Indicators in standard 19" instrument racks. Four versions are available for mounting 1, 2, 3, or 4 indicators. Order Accessories RKS1 for 1 cutout; RKS2 for 2 cutouts; RKS3 for 3 cutouts; RKS4 for 4 cutouts.
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Model 500D General Specifications |
Repeatability
±1 count
Stability with Temperature
Zero: 1µV/°C
Span: 0.01%rdg/°C
Stability with Time
10 counts/year max.
Noise Rejection
NMRR: 60dB @ 50/60Hz, ±0.1Hz
CMRR: 120dB @ 50/60Hz
±0.1Hz with 250
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Model 500D Ordering Guide |
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| Model | Description |
| 500D-10 | 500D Meter; 115/230VAC power; nominally set by factory for 115VAC |
| 500D-10-09 | 500D Meter with DC; Excitation Option built in |
| 500D-10-03 | 500D Meter with Alarm Option built in |
| 500D-10-20* | 500D Meter with Six-channel Selector built in* |
| 500D-10-09-03 | 500D Meter with both DC Excitation and Alarm Option built in |
| *Switching current loops: 1N4002 diodes should be installed on the inputs to maintain loop continuity. | |
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Model 500G - User-Scalable Strain-Gage & Load Cell Indicator |
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Select this text to download the Model 500G Operator's Manual in PDF format. The Model 500G features total user flexibility for strain-gage input, range, and display. It is compatible with both bonded-foil type (2mV/V, 3mV/V, 4mV/V) transducers and higher output, semiconductor (10mV/V, 20mV/V, 30mV/V) type strain-gages. Combining this input flexibility with user scaling, 4-digit display, small size, and low cost makes the Model 500G the best value strain-gage and load cell indicator available. The 500G's bright, LED display provides excellent operator readability. Its microprocessor design and ratiometric measuring circuit assure high accuracy with superior repeatability. The 500G includes a built-in, 10VDC excitation supply to power the strain-gage transducer to save you separate sourcing costs. Scaling and calibrating the 500G to display engineering units from the strain-gage input have never been easier. Two simple push buttons conveniently located behind the snap-off lens are used to set zero (Lo), full-scale (Hi), and a decimal point. Because the 500G's scaling is digitally set, there are no pots to drift nor complicated formulas to compute to set DIP switch gain-ranges. It can achieve sensitivities as low as 1µV per count and can be scaled anywhere within its wide -999 to 9999 display count. For ease of installation, each instrument is supplied in a standard 1/8 DIN 1.9" x 3.8" (48mm x 96mm) plastic case and has rear-accessible universal screw terminals. Large LEDs make process readings easy to see and read, even from a distance. Power is derived from 115 or 230VAC and is selectable via an internal slide switch. Whether your strain-gage application calls for measuring pressure, weight, torque, tension, or thrust, the 500G is the answer. Alarm Setpoint Option. The alarm option provides a single or dual limit setpoint that can be set to any point, + or -, within the 500G's measuring range. The user digitally selects the setpoint with two buttons located on the front panel. Selection of Hi or Lo (single) alarm or Hi and Lo (dual) alarms is set via a jump-jack located in the option card. Once the setpoint is set, it may be reviewed for its actual value by pressing the View button. A front panel LED illuminates red (single alarm) or red/yellow (dual alarm) when the alarm trips. Each Alarm Setpoint
option card also includes one Form C, 0.5A relay (single alarm) or two
Form C, 0.5A relays (dual alarm) for hook-up to external lamps, buzzers,
or on/off control elements. Relay terminals are accessible at the rear
of the instrument and provide hook-up for Normally Open or Normally
Closed operation. Series 500 Accessories. The Rack Adapter Plate permits easy mounting of 500 Series Indicators in standard 19" (48.3cm) instrument racks. Four versions are available for mounting 1, 2, 3, or 4 indicators. Order Accessories RKS1 for 1 cutout; RKS2 for 2 cutouts; RKS3 for 3 cutouts; RKS4 for 4 cutouts.
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| Model 500G General Specifications | ||
| 0-5mV/V | 0-50mV/V | |
| Input
Range (user selectable) |
50mV maximum full-scale | 500mV maximum full-scale |
| Sensitivity
minimum 1 display count |
maximum
1µV/count, minimum 1 display count |
maximum 10µV/count |
| Accuracy | ±0.02%
rdg, ±1 count for sensitivities  2µV/count;
±0.02% rdg, ±4 counts for sensitivities <2µV/count |
±0.02%
rdg, ±1 count for sensitivities 20µV/count;
±0.02% rdg, ±4 counts for sensitivities <20µV/count |
Display Scaling Range
-999 to 9999
Stability with Temperature
Zero: 1µV/°C
Span: 0.01%rdg/°C
Stability with Time
10 counts/year max.
Noise Rejection
NMRR: 60dB @ 50/60Hz, ±0.1Hz
CMRR: 120dB @ 50/60Hz, ±0.1Hz
with 250
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