6.4.2 Statistical surveillant general measurement error test:

6.4.2.1 Statistical surveillant voltage measurement precision test:

Adjust the monitored power and work power the same time, to make sure the surveillant can fit the demand of 0.5 grade precision for voltage measurement while the voltage is rating, and 120%, and 80%.

6.4.2.2 Statistical surveillant general measurement error test while the voltage is eligible ratio, ultra-upper limit ratio and ultra-lower limit ratio.

a. Input a start time and ensure the output power is required ratio, then start machine, adjust the monitored voltage to fluctuate within rating. When the test is over 10mins, turn off the power. Display or print individually voltage eligible ratio as 100%, ultra-upper limit ratio as 0.00% and ultra-lower limit ratio as 0.00%. The max is the max out-put voltag, and the min is the min out-put voltageduring the above 10min, accordingly calculate relatively error. All statistic should be fit the demand of 5.5.1;

b. Adjust the monitored power and ensure it change slowly between the upper limit of rating and the upper limit of measurement range. Input the monitored power into the machine, if it displays ultra-upper limit rating, record the number. Then the machine goes into the next 10mins working time. 10mins later turn off the power. Display or print individually voltage eligible ratio as 50%, ultra-upper limit ratio as 50% and ultra-lower limit ratio as 0.00%. The max is the max out-put voltag, and the min is the same as 6.4.2.2 clause a, accordingly calculate relatively error. All statistic should be fit the demand of 5.5.1;

c. Adjust the monitored power and ensure it change slowly between the lower limit of rating and the lower limit of measurement range. Input the monitored power into the machine, if it displays ultra-lower limit rating, record the number, and calculate the basic error while the lower limit of given voltage rating. Then the machine goes into the next 10mins working time. 10mins later turn off the power. Display or print individually voltage eligible ratio as 33%, ultra-upper limit ratio as 33% and ultra-lower limit ratio as 33%. The max is the same as 6.4.2.2 clause b ,and the min is the min out-put voltag, accordingly calculate relatively error. All statistic should be fit the demand of 5.5.1.

6.4.3 General measurement error test for recording surveillant monitoring voltage total time, time of voltage excessupper limit, and time of voltage excess lower limit:

a. Calculagraph of surveillant locates in the start position, adjust the monitoredvoltage and put into surveillant., and adjust the monitored voltage within the given voltage. 10mins later turn off the power. The total time should display as 10min, ultra-upper limit time and ultra-lower limit time should be 0；

b. Adjust the monitored power and ensure it fluctuate between the upper limit of rating and the upper limit of measurement range. Input the monitored power into the machine, then the machine goes into the next 10mins working time. 10mins later turn off the power. The total time should display as 20min, ultra-upper limit time should be 10mins, and ultra-lower limit time should be 0；

c. Adjust the monitored power and ensure it fluctuate between the lower limit of rating and the lower limit of measurement range. Input the monitored power into the machine, then the machine goes into the next 10mins working time. 10mins later turn off the power. The total time should display as 30min, ultra-lower limit time should be 10mins, and ultra-lower limit time should be 10mins. All statistic should be fit the demand of 5.5.1.

6.4.4 Time error test:

a. Set a trial value for year, month, date, hour, minute, second, and keep runing continuously3days, measure the time a time every 24hours, comparing with the standard time, calculate the AG of error, and the error should fit the demand of cluase 5.5.4;

b. Set a value of the end of a year, such as 1991-12-31 59:30, 30s later, to see if the time conversion fit the demand of clause 5.4.1.3, ie, it shows 1992-1-1 0:0:0

6.4.5 Sensitivity test:

As the recording surveillant is concerning, during the test, if the monitored voltage narrowly drive the surveillant alarming for excessing rating and turning back to eligible status from excessing rating status, record the voltage value. The sensitivity calculated should fit the demand of clause 5.5.3.

6.5 Environment test:

6.5.1 Temp test and power voltage, frequency test:

a.Turn on the surveillant individually while in 40±2℃, 20±2℃ and-5±2℃, after heat balance(at least one hour), proceed with test according to the clause 6.4.2 and 6.4.3(hereby call it precision test for short), then keep the power frequence at 50Hz, work voltage at upper limit and lower limit individually. Then change the work voltage to rating value, and match the frequency at 52.5Hz and 47.5Hz individually, proceed with precision test during the above conditions, calculate relatively error, All statistic should be fit the demand of clause 5.5.1;

b.At the upper limit of limited temperature, turn on surveillant, after heat balance, proceed with function test. Then adjust the work voltage to lower limit value, and frequency to 47.5Hz to proceed with function tset;

c. At the lower limit of limited temperature, turn on surveillant, after heat balance, proceed with test according to the clause 6.3.2 (hereby call it function test for short). Then adjust the work voltage to upper limit value, and frequency to 52.5Hz to proceed with function tset;

d.At the upper limit and lower limit temp of storage condition, turn off the powerat least 4 hours. Thenrenew the temp to 20±2℃, and turn on the power, after heat ba;ance, proceed with function test;

e.During temp test refer to GB6587.2, and power frequency and voltage fit the demand of clause a, b and c. The temp tset can be proceeded accordingly the phase of temp. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.2 Humidity test:

a.It can ne associated with temp test, when the temp is 40±2℃、20±2℃, proceed with precision test according ly different humidity of 90%, 55%, 20%;

b.Humidity storage test is that when the temp and humidity both locate upper limit value, turn off surveillant and keep 24 hours, then renew the temp to 20±2℃, and humidity to 55%±10%, hereafter turn on power, after heat and humidity balance, proceed with precision test;

c. During humidity test refer to GB6587.2. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.3 Shake test:

At the condition of no pack and non-working, surveillant can stand shake from three axises and recycle twice. The procedure should fit the demand shown as Form4. During the test refer to the GB6587.4. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.4 Impact test:

At the condition of no pack and non-working, surveillant can stand the impact of a half sin wave and fit the demand of Form4. During the test refer to the GB6587.4. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.5 Incline drop test:

Proceed test while surveillant is on working, and fit the demand of Form4. Test four times in different position. During the tset refer to the GB6587.5. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.6 Transport test

Packed in stated transport package, the position is vertical and fixed, and fit the demand of Form4. During the test refer to the GB6587.6. After tests, inspection for surveillant shoud fit the clause 5.6.

6.5.7 Anti-interference test:

Add a sharp pulse interference voltageto to surveillant power, which has the below parameter:

Pulse breadth: 1000V;

Pulse width: 0.1~2цs:

Pulse cycle: 20ms

Exert time: ﹥30ms。

Under those interference condition, proceed with precision test, calculate relatively error. All statistic should be fit the demand of clause 5.5.1.

6.5.8 Harmonious wave effect test:

Under the condition of standard use, add individually harmonious wave to rating value, upper limit value and lower limit value of the monitored voltage to make sure the voltage wave aberranceto be 5%, during this condition, surveillant can work reliably. All statistic should be fit the demand of clause 5.5.1.

6.6 Reliability test:

6.6.1 Test scheme:

Adopt Changeable Time Cut trial Test XVIIC cheme of SJ1889 Electronic Measurement instrument Reliability test scheme to proceed with reliability test. The samples must be sampled randomly from which have been inspected consistency. Sample sheme as Form5.

Form5

Judgement test report according to Form6

Form 6

6.6.2 Tset condition:

a. Surveillant works in the upper limit value of normal working temp and humidity;

b. Surveillant works continuously 8hours as a cycle, every one cycle check panel function at least twice, and also check printer, if any;

c. During every 24hours, the voltage value is in upper limit value for one third, in rating value for one third, and in lower limit value for the rest one third;

d. The product being on test, should be proceed with function tests while inspect at normal temp, after shake test, and during high temp test, the voltage value is in upper limit value, rating value, and lower limit value. The shake test can be arranged before or after the test.

6.6.3 Failure judgement:

If one of the follow errors occurs, while on testing, surveillant is failure:

a. Data display irregular;

b. Buttons are out of work;

c.Preset data loss or program disorder;

d. After time delay, time circuit is out of order;

e. Although the power is supplied within permission bound, after the power is cut off, the reserved data loss;

f. The printed content disaccords with what displays .

6.6.4 Calculation failure qty:

a. One failure is recored as failure qty;

b. During tests, if the same error occures twice and above, each failure is recored as failure qty individually;

c. During tests, if the errors are caused by operation mistake or by external extra stree, they arenot recored as failure;

d. Subordinativefailure is not recored as failure qty.

6.6.5 Reliabiluity test should be proceed, when inspect, and it must be proceed with,if surveillant resumes after stopping production for one year or more, main material or parts are changed, and models are changed.

7.1 Inspection sort

.Surveillant inspections are classified to be identifying inspection, quality consistency inspection and customers acceptance inspection. The inspection items should accord with the demand of Form7.

7.2 Sample sheme for identifying inspection

Inspection item1~4, Sample randomly 5 pieces. Samples choice: fetch all, if production is less than 10 pieces, if the quantity is more than 10 pieces, after complete 10 pieces, then proceed to sample.

Inspection item5~13, Sample randomly 2 pieces from the eligible items out of item1~4.

Inspection item14, according to clause 6.6.

7.3 Inspection Judgement

During the item1~13, one or two failure is allowed, otherwise, it’s failure.

If item14 accord with clause 5.7, it’s eligible.

7.4 Identifying inspection

Identifying inspection is proceeded when new product is made. During prodution, if product structure, material, or artwork change, and thise change maybe effct the capability; if resume to produce after stopping producing more thanone year, identifying inspection is required.

The cycle of identifying inspection is general 2years.

7.5 Quality consistency inspection

Quality consistency inspection is to proceed with non-damage test for all products or all samples.

7.6 Customers acceptance inspection

Form 7

Note：●means necessary inspection items

×Non-necessary items

For customers acceptance inspection, appearance inspection, basic safe test, function test, precision test, are necessity, customers can proceed to other inspection listed in Form7.

8.1 Mark

8.1.1 Product nameplate:

a. Manufacturer and brand;

b. Product name, spec, model and certification mark;

c. Rating value;

d. gate and serial No.

8.1.2 Master package should be marked the followings with hard to washdown paint:

a. Manufacturer and brand;

b. Product name, spec, model and certification mark;

c. Gross weight

d. Volume

e. Up, fragile, dampproof marks.

8.2 Package

8.2.1 surveillant should be packed in dampproof, quakeproof and dustproof package.Escort mat should not make the package bulge, and make surveillant move during transport. After transport, package should be in good condition.

8.2.2 There are brochures of tech data, test reports, eligibility card, spare parts anditem list.

8.3 Transport

Transport and load&unload surveillant must accord with the instruction marked in the package. All transport methods are allowed.

8.4 Storage

Surveillant is storeed in warehouse in the condition of -40~60℃ temp and relative humidity no more than 90%. No acid, alkali, corrosive and explosive gas, and free from dust and rain or snow corrosion.