Test Equipment (Electrical & Measurement Equipment)
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Manufacture: Yokogawa Product Description: Model 2752 is a precision laboratory standard Kelvin bridge for measuring resistance below 100ohms to an accuracy of +-0.03 to 0.05%. This instrument is used not only for high-precision measurement of resistance but also for measurement of electrical conductivity of conductors and calibration of low resistance instruments. It is also designed for testing large-capacity shunts and measuring lead resistance per unit length of bar or wire conductors in combination with accessory.
For exact measurement of low resistance, precision type
Measuring Range: 0.10000 ohms to 111.10 ohms (Consist of five decades)
Features: Also for measurement of electrical conductivity of conductors and calibration of low resistance instruments.
Specifications:
Measuring Range 0.1000m Ohms to 111.10 Ohms in five digits
Measuring Arm (At Multiplier x1) 100m Ohms x 10 + 10m Ohms x 10 + 1m Ohms x10 + (0.05 to 1.05m Ohms)
Multiplier x 0.001, x 0.01, x 0.1, x 1, x 10, x 100
Min. Division 0.00001m Ohms at x 0.001 0.0001m Ohms at x 0.01 0.001m Ohms at x 0.1 0.01m Ohms at x 1 0.1m Ohms at x 10 1 Ohms at x100
Accuracy +-(0.03 Ohms of reader +1micro Ohms)at temperature at 10 to 35 degrees C+-2.5 degrees C At resistances potential Leads and current leads less then 10m Ohms/wire +-(0.05 Ohms x multiplier +0.01m Ohms)at temperature at 10 to 40 degrees C
Current Rating 30A at x 0.001 10A at x 0.01 3A at x 0.1 0.5A at x 1 0.15A at x 10 0.05A at x 100
Power Source Two 1.5V batteries (R20P)
External Power Source is also usable and needed Terminals are provided
Insulation Resistance More than 100M Ohms at 500V DC between the electric circuit and the case
Dielectric Strength 500V AC for one minute between electric circuit and case
Dimensions 310 x 491 x 140mm (12 1/4 x 19 3/8 x 5 1/2")
Weight 25.3lbs (11.5kg)
Case Grey Metal Case, with Plastic Feet and carrying handles
Manufacture: Yokogawa Product Description: Model 2755 Measures resistances from the 100 m Ohms to the 110M Ohms Range by operation of switches. Batteries and the Galvanometer are self-contained, for your safety. The Front Panel is provided with power and galvanometer circuit selectors, One ratio arm dia, and four measuring arm dials. Model 2755 is also equipped with a Murray and Varley Loop tester for convenient location of line faults such are "shorts" and "Grounds" in power, telephone, telegraph, and signal cables.
No Auxiliary attachment require
Galvanometers with a built-in protection circuit
Compact, lightweight
Built-in Murray & Varley loop Testers
Measuring Range: 1.000 ohm to 10.00 Megohms (Consist of four decades)
Can be used as 5-dial decade resistance box.
Specifications:
Measuring Range 1.000 Ohms to 10.00M Ohms
Measuring Arm x 1m Ohms, x 10 Ohms + 10 Ohms x 10 + 100 Ohms x 10 + 1000 Ohms x10 (min. one step: 1 Ohms)
Ratio Arms x 0.001 x 0.01, x 0.01, x 0.1, x 1, x 10, 100, x 1000 (M10, M100, M1000... Murray & Varley loop testing)
Accuracy +-0.1% of reading on 100 Ohms to 100k Ohms Range +-0.3% of reading on 10 Ohms to 1M Ohms Range +-0.6% of reading on 1 Ohms to 10M Ohms Range
Temperature coefficient of Resistance Elements +-0.5 x 10-5 / degrees C at ambient temperature of 5 to 35 degrees C (41 to 95 degrees F) +-2 x 10-5 / degrees C at ambient temperature of 20 to 35 degrees C (68 to 95 degrees F)
Manufacture: Yokogawa Product Description: Model 2768 is a Precision bridge used for the exact determination of resistance in the 100 m Ohms to the 110M Ohms Range with an accuracy of 0.01 to 0.05%. Since this instrument includes a high-sensitivity transistorized galvanometer and bridge power source, no auxiliary device is needed.
+-0.01% Accuracy
Superior Resistor Element
Minimized contact resistance
Guarding and shielding
Stable Operation
Heat-insulated pushbutton Keys
Specifications:
Measuring Arm 0 to 11, 111 Ohms adjustable in 0.1 Ohms steps, (consists of five decades; 1,000 Ohms x 10 + 100 Ohms x 10 Ohms x 10 + 1 Ohms x 10 + 0.1 Ohms x 10)
Multiplier x 100m Ohms, x 1 Ohms, x 10 Ohms, x100 Ohms, x1k Ohms, x 10k Ohms, x100k Ohms, x1M Ohms, and x10M Ohms
Accuracy (at 23+-2 degrees, less then 75%) x 100m Ohms range.. +-0.5m Ohms, x 1 Ohms range... (+-0.02% of setting +0.5m Ohms) x 10 Ohms range, x 100k Ohms & 1M Ohms ranges... +-0.02% of setting x100 Ohms x 1k Ohms & x 10k Ohms ranges... +-0.01% of setting x10M Ohms range... +-0.05% of setting
Maximum Allowable Input 0.2W continuously for ratio arm, 0.2W continuously per element of Measuring arms
Galvanometer (built-in) Max sensitivity... approx. 10microV/div. (provided with a sensitivity adjuster)
Galvanometer Battery Single 9V battery (JIS 6F22 or equivalent)
Galvanometer Battery life Approx. 300 Hours
Insulation Resistance More then 1000 Ohms at 250V DC at ambient Humidity of less then 75% between electric circuit and case
Dielectric Strength 500V AC for one minute between electric circuit and case
Bridge power source (built-in) Power source range 1.5/3/6/15V selectable Power source battery four 1.5V batteries (JIS R20P, ANSI D, Mono 1.5V or equivalent) and a single 9V battery (JIS 6F22, ANSI 6F22, Energieblock 9V or equivalent)
Case Grey metal Case, with plastic feet and carrying handles
Manufacture: Yokogawa Product Description: Accuracy: +-7% rdg; Features: 3 ranges, Output to recorder. General-purpose model
0 to 3000lx in switch selected, three ranges
Cosine and color corrected
Output to recorder (standard)
Compact and light weight (0.9 kg)
Standard carrying case
No power source required
Specifications:
Measuring Range 0 to 30, 0 to 1000, and 0 to 3000 lx (switch selectable)
Accuracy +-7% of reader (23 degrees C+-2 degrees C)
Photocell Selenium cell with plastic molding
Photocell Lead Approx. 1.1m (3.6ft) long
Cosine Correction Angle of incident: Correction by globe cover 10degrees within +-1.5% 30 degrees within +-3% 60 degrees within +-10% 80 degrees within +-30%
Indicator Taut band suspension type with a mirror scale
Manufacture: Yokogawa Product Description: The Yokogawa 3286A High Sensitivity Luxmeter is best used for measuring the low intensities of illumination from 0 to 300 lx in 5 ranges. This model is far more sensitive, thus making reading more accurate when used.
Accuracy: +-7% rdg
Features: 5 ranges, Output to recorder
Cosine and color corrected
Standard carrying case and pocket light
0 to 3, 0 to 10, 0 to 30, 0 to 100 and 0 to 300 lx (switch selectable)
Specifications:
Measuring Range 0 to 300, 0 to 10, 0 to 30, 0 to 100 and 0 to 300 lx (switch selectable)
Accuracy +-7% of reader (23 degrees C+- degrees _C)
Photocell Selenium cell with plastic molding
Photocell Lead Approx. 1.1m (3.6ft) long
Cosine Correction Angle of incident: Correction by globe cover 10 degrees within +-1.5% 30 degrees within +-3% 60 degrees within +-10% 80 degrees within +-30%
Indicator Taut band suspension type with a mirror scale
