Condition:
1. used, from an old stock, has some scratches on the body;
2. not tested; working condition is unknown;
3. Usually I send unit in 5-10 business days after receiving payment – this time I need for unit testing procedure and preparing reliable packaging.
Also we can provide other resistance, capacitance and inductance standards, decade box and other etalons.
Please take a look on my other items!
If you haven’t found the needed item in my listing, please contact me. I’ll try to help you.Resistance box P4834 designed to be used as electrical resistance multivalued
standard (MMEС) in
DC and AC circuits.
Nominal resistance value of one decade
higher decade 105
Ohm
lower decade 10-2 Ohm
Accuracy class 0.02
/ 2.5 • 10-7.
Resistance box P4834 (hereinafter - the box) is designed to be used as electrical resistance multivalued standard (MMEС)
in DC and AC circuits.
Normal working conditions:
ambient temperature (20 ± 2) ° C;
relative humidity from 25 to 80%;
atmospheric pressure 84-106.7 kPa (630-800 mm
Hg.)
DC;
power is not more than nominal (specified in Table 1).
Resistance box P4834
Working conditions of the box:
ambient air temperature from 15 ° to 25 ° C;
relative humidity from 25 to 80%;
atmospheric pressure 84-106.7 kPa (630-800 mm
Hg.)
operating position - any position.
Technical
characteristics
Basic parameters and dimensions of the resistance box are shown in
Table 1.
Table 1
Parameter |
Parameter value |
Accuracy class, с/d |
0.02/2.5·10-7 |
Nominal value of one decade
resistance, Ohm: |
105 10-2 |
Number of decades |
8 |
Nominal power dissipation per
stage, Watt, at its nominal resistance: 10-2 and105
Ohm 10-1 and 104
Ohm from 1 to 103
Ohm |
0.003 0.03 0.3 |
Maximum power dissipation per
one decade, Watt, at its nominal resistance: 10-2 and 105
Ohm 10-1 and 104
Ohm from 1 to 103
Ohm |
0.005 0.05 0.5 |
Higher limit of frequency range, kHz |
50 |
Dimensions, mm |
310х212х175 |
Weight, kg, not more than |
5 |
Resistance boxes decades provide ability
to set resistance value in
accordance with number (0,
1, 2, 3, 4, 5, 6, 7, 8, 9, 10) x10n, where n = -2;
-1; 0, 1; 2, 3, 4, 5.
Acceptable deviation
limit of boxes actual resistance value (δ) in
percentage from nominal under
normal using conditions is defined by the formula:
δ=±(0.02 + 2.5 · 10-7(106/R-1))
where R - nominal value of resistance, Ohm, under
normal using conditions.
Limiting value of boxes constant time (T) at exclusion of primary inductance is equal to value shown in table 2.
Table 2
Nominal value of enabled resistance, Ohm |
Time constant, τ, с |
From 1 to 10 enable. |
2·10-7 |
More than 10 to 103 |
1·10-7 |
More than 103 to
104 |
5·10-7 |
More than 104 to
105 |
1·10-6 |
More than 105 to
106 |
1·10-5 |
Average initial resistance value does not
exceed:
0.012 Ohm
at clamp "5" - "9";
0.024 Ohm
at clamp "1" - "9" for HR11
set switchers on clamp
"2" - "3"
and HR12 at clamp "4" - "5".
Initial resistance values variation is less than 0.0012
Ohm and 0.0024 Ohm.
Primary inductance
L0 in microhenries at boxes clamps "5" - "9" does not exceed value defined
by the formula L0 = 0.1 m +0.2, (2)
where m - number
of enabled decades of the box.
Inductance at resistance
turn on is not more than
1 Ohm at same clamps does not exceed 0.8 mkH.
Acceptable additional
error limit of the resistance box, caused by changes in
ambient temperature between the upper
(lower) temperature range limit in normal using
conditions and in some point of temperature working conditions
corresponds to the largest resistance
change (Rmax), is equal to the value
determined by the formula (1).
Acceptable additional error limit of resistance box (δр) in percentage from its nominal
value when the changing power
dissipation from nominal to any value
does not exceeding maximum power under normal using conditions and thermal
equilibrium steady state, is equal to value determined by the formula (1).
Acceptable additional error limit of resistance box (δр) as a percentage, caused by frequency changes from zero to the
upper frequency range limit shown
in table 3 (frequency
error) is equal to ± 0.05%.
Electric insulation resistance between case and
isolated by DC electric circuit in working using conditions is not less
than 5 • 1010 Ohm.
Insulation between case and insulated from case by DC electric circuit can withstand for
1 min of test voltage alternating current frequency (50 ± 1) Hz, rms value is
equal to 2 kV.
Table 3
Decade factor |
Frequency
range upper limit , kHz |
«х 1 Ohm» «х 10 Ohm», «х 102
Ohm» «х 103 Ohm» «х 104 Ohm» «х 105 Ohm» |
25 50 10 5 1 |
Switches can withstand 50000 turns from lock to lock, have a smooth running and precise fit.
Box rate mean time between failures
is 10000 hours, taking into account regulated
operational documentation.
Mean time between failures is set for working using conditions and dissipation power to one level
and is not more than nominal.
Failure criterion is box’s discrepancy to formulas requirements (1).
Average life time of box’s operating state 24
hours
Full average box life service is10 years.
Box fixed-failure operating time in working conditions and maximum power
dissipation at same level is 1000 hours
Box specified life service - 5 years.
Silver content in box – 3 g.
Non-ferrous metals content in box:
aluminum alloys - 576.5 g;
copper alloys 1470.63 g.
Condition:
1. used, from an old stock, has some scratches on the body;
2. not tested; working condition is unknown;
3. Usually I send unit in 5-10 business days after receiving payment – this time I need for unit testing procedure and preparing reliable packaging.
If necessary we can take photos of a device from various angles.
Technical Documentation
In case you didn't find in technical specifications for the device all necessary information you are interested in, feel free to contact me. I will look through the technical documentation for the device and I will be happy to consult you.
Also I may speak directly with the manufacturer and find out more specific information about this product.
If some technical parameters for the device (error, accuracy, measuring range, operating voltage and frequency) do not meet your requirements, please, e-mail me and I will negotiate with the manufacturer whether it is possible to deliver you a device on the desired specifications without a cost increase and in the shortest time.
On delivering the device, electric circuit diagrams and all technical documentation for operation, calibration and maintenance will be supplied. Also there will be documents that testify the accuracy and compliance with specifications.
In addition, translation of technical documentation into the customer’s language may be discussed.
Delivery set
On delivering the device will be completely ready for use.
There are all necessary cables, adapters, sensors and spare parts as envisaged in technical documentation. Hence, there is no point in purchasing any additional repair & measurement equipment.
Packaging
Immediately after checking, the device will be wrapped in several layers of strong air-bubble film and placed into a strong cardboard box. Extra cardboard plates will be used for fixation.
If necessary, wooden box or pallet may be used. For a more reliable fixation foam can be applied. The whole box will be placed in a waterproof polyethylene bag which will be wound with several layers of packing tape.
A special handle will be made for ease of transportation.
Thus, I guarantee qualitative and conscientious packing of the device that reduces to minimum the possibility of damage during transportation.
Discount (from-10% to -90%)
I suggest you a device which is unique in its class and price category with the following specifications: (accuracy, measurement range, error, temperature operating conditions), endurance and durability (military performance, aluminum, stainless steel, titanium or carbolite casing, shock and vibration resistance, high maintainability and reliability), free measuring kit (cables, adapters, load, fuses, etc.), 1year warranty.
If you consider the price for this device unreasonably high, and you know the similar equipment at a lower price, please, let me know.
I will help you to compare these two models. In case your model (which is cheaper) is the same as the device I suggest or even it is better, then
I guarantee to sell you a unit at that cheaper price with additional 10% discount.
Shipping details:
Please, mind that I ship from Ukraine (Europe, +2), so that the shipping time may differ from your local time.
I send goods via AirMailpost.
App. delivery time :
Europe – 7-15 days;
USA, Japan&others – 10-20 days (depends on a country).
I will ship in 5-10 business days after payment clearance.
The goods may also be delivered by the express mail services such as DHL, UPS, FedEx, TNT or EMS.
With express delivery you will mostly receive your goods within 3-7 working days.
Payment details:
I expect payment in 4 days after the auction ends.
I accept a PayPal payment as the safest way of payment (preferably).
If you do not have a PayPal account you can pay by wire transfer to my credit card.
Other variants of payment are acceptable, for example in case of pickup way of shipping, i can accept cash payment.
(This will be an official purchase on eBay).
Please, tell me if you cannot pay in time, we can always negotiate it.
When purchasing a few items, you’ll save on shipping.
Return policy:
I accept refunds and returns. If there is something wrong with the device, please, inform me within 5 days after receiving it.
I will refund your costs or send you the other item, as you wish (after I receive the previous item).
Please only serious bidders!