GB/T 22777-2019Numeral information calendars (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 22777-2008 "Digital Information Calendar". Compared with GB/T 22777-2008, the main technical changes are as follows:

--- Modified the "scope" (see Chapter 1);

--- Updated normative references (see Chapter 2);

---Modified the "flag" requirement (see 4.1);

--- Removed the requirement for cumulative error in "Work Reliability" (see 4.4);

--- Removed the "instantaneous daily difference" requirement;

--- Revised the indicator of "real walking difference" (see 4.5);

---Modified the requirements of "input power and current" (see 4.6);

---Modified the "memory function" requirements and test methods (see 4.11, 5.3.12);

--- Revised the "moisture resistance" requirements and test methods (see 4.14, 5.3.16);

--- Modified the "display synchronization" requirement (see 4.17.1);

--- Added "temperature indication function" requirements and test methods (see 4.18, 5.3.22);

---Modified "power supply" (see 5.1.2);

---Modified "instrument equipment" (see Table 2);

---Modified the test method for "power cord and plug" and "component" (see 5.3.7, 5.3.8);

--- Revised the "appearance" test method (see 5.3.17);

--- Revised the type inspection of the "Power Cord and Plug" and "Component" items (see 6.2.1.3);

--- Modified "Transportation Storage" (see 7.3.2).

1 Scope

This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of digital information calendars (hereinafter referred to as information calendars).

This standard is applicable to digital clock products that display basic information such as time, date, and week, and additional information in digital form.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB 1002 Single-phase plug and socket type and basic parameters and dimensions for household and similar purposes

GB/T 2828.1 Sampling procedures for sampling by sampling - Part 1: Batch-to-batch sampling plan, searched by AQL

GB/T 2829 Cycle Inspection Counting Sampling Procedures and Tables (Applicable to Inspection of Process Stability)

GB 4706.1-2005 Safety of household and similar electrical appliances - Part 1: General requirements

GB/T 5023.5 PVC insulated cables of rated voltages up to and including 450 750V, Part 5: Flexible cables (cords)

GB/T 6046 pointer type quartz clock

3 Electrical parameters

The electrical parameters of the information calendar are as follows:

---Rated voltage: AC220V;

---Rated frequency: 50Hz.

Note: Electrical parameters with other requirements can be agreed between the supplier and the buyer.

4 Requirements