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Simpson 79 Wattmeter Rectangular Style
Click image to enlarge
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Features:
- Compensated Wattmeters for Low Value Power
Measurement
- ±2% F.S. Accuracy (±3% F.S. for Compensated
Type)
- Calibration for Either Magnetic or Non-Magnetic Panels
- Three Popular Sizes: 2-1/2", 3-1/2", 4-1/2"
- Phenolic Cases With Glass Windows
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Description
For unsurpassed stability and quality
performance look to Simpson's rectangular style meters. The rectangular
style offers an attractive look with sharp, beveled edges and glass
windows for easy viewing. Available in 2-1/2", 3-1/2"
and 4-
1/2" sizes (3-1/2", 4-1/2" sizes only for Compensated
type), this style can be ordered in ranges from 20 to 3000 watts.
Due to power dissipation, errors are usually prevalent in standard
wattmeters at low values of power. This error is corrected in Simpson’s
Compensated wattmeters. Standard wattmeters have a single phase
accuracy of ±2% of full scale (F.S.) (±3% of full
scale for Compensated type). Wattmeters have the Simpson dynamometer
movement that is calibrated for either magnetic or non-magnetic
panels and for a frequency range of 25-125 Hz. The dynamometer movement
is air-damped, using the same high quality pivots and jewels as
the other fine Simpson meters to support the moving element. This
style of meter is ideal for many other electrical functions. |
Models, Options, & Accessories
| Model |
Description |
List Price |
Sale Price |
| 10720 |
79 0-75 WATTS 4.5 RECT |
$243.75 |
| $231.56 |  |
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| 10730 |
79 0-150 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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| 10740 |
79 0-300 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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| 10750 |
79 0-600 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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| 10760 |
79 0-750 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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| 10770 |
79D---- 0-1500 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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| 10780 |
79D---- 0-3000 WATTS 4.5 RECT |
$243.75 |
| $231.56 | |
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Ordering Options
Specifications
| Accuracy |
±2% F.S; Compensated meters: ±3% F.S. |
| Movement |
Dynamometer |
| Suspension |
Pivot and jewel |
| Tracking |
±3% |
| Shielding |
Calibration is unaffected by magnetic panel mounting |
| Response Time |
1.5 seconds maximum |
| Overload (1 sec.) |
10 times F.S. |
| Overload (Continuous) |
1.5 times F.S. |
| Repeatability |
2% |
| Dial |
Sharp clear scale. Each dial arc is calibrated to track the specific type of movement used. |
| Resistance |
±15% |
| Operating Temperature |
-4ºF to +149ºF (-20ºC to +65ºC) |
| Case |
High density black phenolic |
| Pointer |
Spade pointer, with black matte finish |
| Scale Length |
Model 177: 1.60" (40.60mm)
Model 77: 2.30" (58.40mm)
Model 79: 3.50" (89.0mm) |
| Net Weight |
Model 177: 9oz (0.26kg)
Model 77: 9oz (0.26kg)
Model 79: 12oz (0.34kg) |
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